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CN111959493B - Method and device for determining energy flow of hybrid electric vehicle with series-parallel structure and vehicle - Google Patents

Method and device for determining energy flow of hybrid electric vehicle with series-parallel structure and vehicle Download PDF

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Publication number
CN111959493B
CN111959493B CN202010897644.0A CN202010897644A CN111959493B CN 111959493 B CN111959493 B CN 111959493B CN 202010897644 A CN202010897644 A CN 202010897644A CN 111959493 B CN111959493 B CN 111959493B
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vehicle
state
driving motor
determining
energy flow
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CN111959493A (en
Inventor
裴鹏宇
朱杰
陈杰
杨官龙
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Deep Blue Automotive Technology Co ltd
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Chongqing Changan New Energy Automobile Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B60W2050/146—Display means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/083—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention aims to provide a method and a device for determining the energy flow of a hybrid electric vehicle with a series-parallel structure and the vehicle, which can accurately determine and display the energy flow direction of the whole vehicle in the running or stopping process, present the current vehicle power flow direction for a driver and promote the technological sense. The method for determining the energy flow of the hybrid electric vehicle with the series-parallel structure comprises the following steps: collecting the working state of the whole vehicle, the output current information of a battery, the actual output torque of a front driving motor and a rear driving motor, the output torque of a generator, the working state of a front axle clutch, the working state of an engine, the charging state of the vehicle and the vehicle speed information at the current moment; determining an energy flow state according to the whole vehicle working state of the vehicle, current information of a power battery, actual output torque of a front driving motor and a rear driving motor, output torque of a generator, working state of a front axle clutch, working state of an engine, charging state of the vehicle and vehicle speed information; and outputting and displaying the energy flow state.

Description

Method and device for determining energy flow of hybrid electric vehicle with series-parallel structure and vehicle
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a method and a device for determining energy flow of a hybrid vehicle with a series-parallel structure and a vehicle.
Background
With the increasing serious problems of global energy shortage, environmental pollution caused by automobile emission and the like, the promotion of high-efficiency and low-emission new energy automobiles has become the consensus of all the circles. Hybrid new energy automobiles are also becoming a trend in national policy direction and industry development. With the increase of automobile families, the number of alternative automobile products is increased, and the convenient man-machine interaction display is also a consideration factor for people to select automobiles and a selling point for manufacturers to sell automobiles.
The hybrid electric vehicle has two or more power sources of an engine and a motor, and has different driving or energy recovery control modes due to the coupling mechanism. When the vehicle runs, the pure electric vehicle only drives the motor or recovers energy, the flow direction of the energy is simpler, but different energy flows are caused by different starting and stopping of the engine, driving and recovering of the motor and control of the coupling mechanism of the hybrid electric vehicle, and how to determine the flow direction of the energy and how to display the energy to a driver is complex and important.
Disclosure of Invention
The invention aims to provide a method and a device for determining the energy flow of a hybrid electric vehicle with a series-parallel structure and the vehicle, which can accurately determine and display the energy flow direction of the whole vehicle in the running or stopping process, present the current vehicle power flow direction for a driver and promote the technological sense.
In order to achieve the above object, an embodiment of the present invention provides a method for determining an energy flow of a hybrid vehicle with a serial-parallel structure, including:
collecting the working state of the whole vehicle, the output current information of a battery, the actual output torque of a front driving motor and a rear driving motor, the output torque of a generator, the working state of a front axle clutch, the working state of an engine, the charging state of the vehicle and the vehicle speed information at the current moment;
determining an energy flow state according to the whole vehicle working state of the vehicle, current information of a power battery, actual output torque of a front driving motor and a rear driving motor, output torque of a generator, working state of a front axle clutch, working state of an engine, charging state of the vehicle and vehicle speed information;
and outputting and displaying the energy flow state.
Preferably, the step of determining the energy flow state includes:
if the vehicle is in a vehicle stationary state, the vehicle is in a non-drivable mode and the vehicle is in a non-externally connected charging state, determining that the energy flow of the vehicle is in a stationary state;
if the charging gun of the vehicle is inserted and charging is performed, determining that the energy flow of the vehicle is in an externally connected charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an inactive state, the generator is in an inactive state, the engine is in a direct-drive state and the vehicle is in a parallel driving state, determining that the energy flow of the vehicle is in the engine direct-drive state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an idle state, the engine is in a direct-drive state, the battery is charged through the generator, and the vehicle is in a parallel driving state, the energy flow of the vehicle is determined to be in a mixed driving mode precursor charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-working state, the rear driving motor is in a driving state, the engine charges the battery through the generator, the current of the power battery is smaller than the set electric quantity value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the engine charges a battery through a generator, the current of a power battery is smaller than the set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive discharging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is driven and the front driving motor is driven, the battery is determined to be in a state of being not charged and not discharged according to the working state of the battery, and the vehicle is determined to be in a serial driving state or a parallel driving state, the energy flow of the vehicle is determined to be in a hybrid mode four-wheel drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode front driving motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear drive motor is in a power generation state, the front drive motor is in a non-power generation state and the vehicle is determined to be in a serial drive state or a parallel drive state, determining that the energy flow of the vehicle is in a hybrid mode and the rear drive motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a power generation state, and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-drive motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the front driving motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-power generation state, the rear driving motor is in a power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the energy recovery state of the rear driving motor;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-drive motor energy recovery state in a pure electric mode;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode precursor state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a drivable mode, the front driving motor is in a non-driving state, the rear driving motor is in a driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode rear driving state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a driving state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-wheel drive state in a pure electric mode;
if the speed of the vehicle is zero, the vehicle is in a serial or parallel driving state, and the engine charges the battery through the generator, the energy flow of the vehicle is determined to be in an idle speed charging state;
if the speed of the vehicle is zero and the battery is not in a charging state, determining that the energy flow of the vehicle is in an idling state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a non-power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode sliding state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a non-power generation state, and the engine is in a working state, determining that the energy flow of the vehicle is in a hybrid mode sliding state;
if the speed of the vehicle is greater than the set speed value and the vehicle is in the non-drivable mode, determining that the energy flow of the vehicle is in the non-drivable mode coasting state.
Preferably, the method comprises the steps of,
the parallel driving state refers to the state that the front axle clutch is closed and the engine is in a working state, and the series driving state refers to the state that the front axle clutch is opened and the engine is in a working state;
and when the output torque of the generator is larger than a first set value, determining that the generator is in a driving state, and when the generator is smaller than a second set value, determining that the generator is in an energy recovery state, and when the output torque of the generator is zero, determining that the engine is in an unoperated state.
The embodiment of the invention also provides a device for determining the energy flow of the hybrid electric vehicle with the series-parallel structure, which comprises the following steps:
the acquisition module is used for acquiring the working state of the whole vehicle, the output current information of the battery, the actual output torque of the front driving motor and the rear driving motor, the output torque of the generator, the working state of the front axle clutch, the working state of the engine, the charging state of the vehicle and the vehicle speed information at the current moment;
the determining module is used for determining an energy flow state according to the whole vehicle working state of the vehicle, current information of the power battery, actual output torque of the front driving motor and the rear driving motor, output torque of the generator, working state of the front axle clutch, working state of the engine, charging state of the vehicle and vehicle speed information;
and the display module is used for outputting and displaying the energy flow state.
The embodiment of the invention also provides an automobile, comprising the energy flow determining device of the series-parallel structure hybrid automobile.
The beneficial effects of the invention are as follows:
the energy flow direction of the whole vehicle in the running or parking process can be accurately determined and displayed, the current real vehicle power flow direction is presented to a driver, a user can know the power source working state of the vehicle at any time, and the technological sense is improved.
Drawings
FIG. 1 is a block diagram of a vehicle powertrain as analyzed by the present invention;
FIG. 2 is a flow chart of the energy flow determination of the present invention;
in the figure, a 1-generator; 2-front axle gearboxes; 3-engine; 4-a precursor motor/generator integrated inverter; 5-a precursor motor; 6-a power battery; 7-a rear-drive motor inverter; 8-a rear drive motor; 9-a rear decelerator; 10. a front axle clutch; 11. a rear axle clutch.
Detailed Description
Embodiments of the present invention are described in detail below. It should be understood that the examples are only for the purpose of illustrating the invention and are not intended to limit the scope of the invention.
Referring to fig. 1, the automobile of the present invention is assembled according to the system block diagram in fig. 1, and in fig. 2, there is provided a method for determining an energy flow of a hybrid automobile system with a series-parallel structure based on the system in fig. 1, the method specifically comprising:
step S1, the whole vehicle controller is used for controlling the front axle clutch, the engine and the vehicle speed according to the whole vehicle driving signals, the generator torque requests, the received actual torques of the front driving motor and the rear driving motor, the current of the power battery, the charging state, the working state of the front axle clutch, the working state of the engine and the vehicle speed signals. The drivable mode refers to a mode corresponding to a state in which "ready" is displayed on the vehicle meter.
Step S2, the whole vehicle controller makes the following judgment according to the signals:
the output torque of the generator is larger than a certain value, the engine is considered to be in a driving state, and the output torque of the generator is smaller than the certain value, the engine is considered to be in an energy recovery state, and the engine does not work when the output torque of the generator is zero; the front axle clutch is closed and the engine is considered to be in a parallel driving state when working, and the front axle clutch is opened and the engine is considered to be in a series driving state when working; the vehicle speed is greater than a certain value and is determined as the vehicle is in motion, and is smaller than a certain value and is determined as the vehicle is in a stationary state; and determining the working states of the front motor and the rear motor according to the actual torque of the front motor and the rear motor.
Step S3 is entered, the vehicle controller determines the state of energy flow according to the driving mode, the charging state, the serial-parallel state, the vehicle speed, the working states of the front driving motor and the rear driving motor, and the working state of the generator, and in this embodiment, the energy flow states determined according to the above information are divided into 26 types. As in table 1:
1. the vehicle is stationary and in a non-drivable state, and is in a non-externally connected charging state to be considered as a stationary state;
2. the vehicle charging gun is inserted, and the charging state is determined as an external charging state;
3. the vehicle is in a running mode, the speed is greater than a certain value, the vehicle is in a parallel driving state, the front and rear driving motors and the generator do not work, the front axle clutch is closed, and the direct driving of the engine is determined as an engine direct driving state;
4. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a parallel driving state, the front and rear driving motors do not work, the front axle clutch is closed, the engine directly drives and charges the battery through the generator to be identified as the hybrid mode precursor charging;
5. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a serial driving state, the front driving motor does not work, the rear driving motor is driven, the engine charges a battery through the generator, the front axle clutch is opened, and the current of the power battery is smaller than a certain value, and is determined to be in a hybrid mode for rear drive charging;
6. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a serial or parallel driving state, a front driving motor is driven, a rear driving motor is driven, an engine charges a battery through a generator, and the current of a power battery is less than a certain value and is determined to be in a hybrid mode for four-wheel drive charging;
7. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the rear driving motor is in a serial or parallel driving state, the front driving motor is driven, and the current of the power battery is greater than a certain value and is determined as the precursor discharge of the hybrid mode;
8. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the front driving motor is in a serial state, the rear driving motor is driven, the front axle clutch is opened, the current of the power battery is greater than a certain value, and the hybrid mode is identified as rear drive discharge;
9. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a serial or parallel driving state, the front driving motor is driven, the rear driving motor is driven, and the current of the power battery is greater than a certain value, and is regarded as four-wheel drive discharge in a hybrid mode;
10. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the rear driving motor does not work in a serial or parallel driving state, the front driving motor is driven, and the current of the power battery is zero and is determined to be kept in a mixed mode precursor;
11. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the front driving motor is in a serial driving state, the rear driving motor is driven, and the current of the power battery is zero and is determined to be in a mixed driving mode for rear driving and maintenance;
12. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a serial or parallel driving state, the front driving motor is driven, the rear driving motor is driven, and the current of the power battery is zero and is determined to be kept in a hybrid mode four-wheel drive;
13. the vehicle is in a drivable mode, the vehicle speed is greater than a certain value, the vehicle is in a serial or parallel driving state, the front driving motor generates power (the torque is greater than a certain value and the vehicle is in an energy recovery state), and the rear driving motor does not generate power and is identified as the energy recovery of the hybrid mode precursor motor;
14. the vehicle is in a drivable mode, the vehicle speed is greater than a certain value, the front driving motor is in a serial driving state, the front axle clutch is opened, the rear driving motor is in a power generating state (the torque is greater than a certain value and the rear driving motor is in an energy recovery state), and the rear driving motor is in a hybrid driving mode and is used for recovering energy;
15. the vehicle is in a running mode, the vehicle speed is greater than a certain value, the vehicle is in a serial or parallel driving state, and the front driving motor and the rear driving motor are both in a power generation state to charge the power battery and determine that the hybrid mode is four-wheel drive energy recovery;
16. the vehicle is in a drivable mode, the vehicle speed is greater than a certain value, the engine is in a non-working state, the front driving motor is in a power generation state (torque is greater than a certain value and is in an energy recovery state) to charge the power battery, the front axle clutch is opened, and the rear driving motor is in the non-power generation state and is identified as the energy recovery of the precursor in the pure electric mode;
17. the vehicle is in a drivable mode, the vehicle speed is greater than a certain value, the engine is in a non-working state, the front axle clutch is opened, the front driving motor is in a non-power generation state, the rear driving motor is in a power generation state (torque is greater than a certain value and in an energy recovery state), and the rear driving motor is identified as a pure electric mode and then is used for energy recovery;
18. the vehicle is in a drivable mode, the vehicle speed is greater than a certain value, the engine is in a non-working state, the front axle clutch is opened, and the front driving motor and the rear driving motor are in a power generation state (torque is greater than a certain value and in an energy recovery state) and are determined to be in a pure electric mode for four-wheel drive energy recovery;
19. the vehicle is in a running mode, the speed is greater than a certain value, the engine is in a non-working state, the front driving motor is in a driving state, the front axle clutch is opened, and the rear driving motor is in a non-driving state and is considered to be a pure electric mode precursor;
20. the vehicle is in a running mode, the speed is greater than a certain value, the engine is in a non-working state, the front driving motor is in a non-driving state, the front axle clutch is opened, and the rear driving motor is in a driving state and is identified as a pure electric mode and then driven;
21. the vehicle is in a running mode, the speed is greater than a certain value, the engine is in a non-working state, the front driving motor is in a driving state, the front axle clutch is opened, and the rear driving motor is in the driving state and is considered to be a pure electric four-wheel drive;
22. the vehicle is at rest, the mode of the vehicle is in a serial or parallel state, and the engine charges the battery through the generator to be identified as idle charging;
23. the vehicle is at rest, the engine is not working, and the battery is not in a charged state and is considered to be idle;
24. the vehicle is in a running mode, the speed is greater than a certain value, the engine is in a non-working state, and the front and rear driving motors are in a non-power generation state and are determined to be in a pure electric mode for sliding;
25. the vehicle is in a running mode, the speed of the vehicle is larger than a certain value, the engine is in a working state, and the front and rear driving motors are in a non-power generation state and are determined to be in a hybrid mode for sliding;
26. the vehicle is in a non-drivable mode, and the vehicle speed is greater than a certain value and is determined to be in a vehicle non-drivable mode for sliding;
27. if none of the conditions of the above states is satisfied, the energy flow state remains the last state.
Figure GDA0002717924010000051
Figure GDA0002717924010000061
TABLE 1
And S4, transmitting the determined energy flow state to an instrument of the vehicle for display.
The embodiment of the invention also provides a device for determining the energy flow of the hybrid electric vehicle with the series-parallel structure, which comprises the following steps:
the acquisition module is used for acquiring the working state of the whole vehicle, the output current information of the battery, the actual output torque of the front driving motor and the rear driving motor, the output torque of the generator, the working state of the front axle clutch, the working state of the engine, the charging state of the vehicle and the vehicle speed information at the current moment;
the determining module is used for determining an energy flow state according to the whole vehicle working state of the vehicle, current information of the power battery, actual output torque of the front driving motor and the rear driving motor, output torque of the generator, working state of the front axle clutch, working state of the engine, charging state of the vehicle and vehicle speed information;
and the display module is used for outputting and displaying the energy flow state.
The embodiment of the invention also provides an automobile, comprising the energy flow determining device of the series-parallel structure hybrid automobile.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (4)

1. The method for determining the energy flow of the hybrid electric vehicle with the series-parallel connection structure is characterized by comprising the following steps of:
collecting the working state of the whole vehicle, the output current information of a battery, the actual output torque of a front driving motor and a rear driving motor, the output torque of a generator, the working state of a front axle clutch, the working state of an engine, the charging state of the vehicle and the vehicle speed information at the current moment;
determining an energy flow state according to the whole vehicle working state of the vehicle, current information of a power battery, actual output torque of a front driving motor and a rear driving motor, output torque of a generator, working state of a front axle clutch, working state of an engine, charging state of the vehicle and vehicle speed information;
outputting and displaying the energy flow state;
the step of determining the energy flow state according to the whole vehicle working state of the vehicle, the current information of the power battery, the actual output torque of the front driving motor and the rear driving motor, the output torque of the generator, the working state of the front axle clutch, the working state of the engine, the charging state of the vehicle and the vehicle speed information comprises the following steps:
if the vehicle is in a vehicle stationary state, the vehicle is in a non-drivable mode and the vehicle is in a non-externally connected charging state, determining that the energy flow of the vehicle is in a stationary state;
if the charging gun of the vehicle is inserted and charging is performed, determining that the energy flow of the vehicle is in an externally connected charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an inactive state, the generator is in an inactive state, the engine is in a direct-drive state and the vehicle is in a parallel driving state, determining that the energy flow of the vehicle is in the engine direct-drive state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an idle state, the engine is in a direct-drive state, the battery is charged through the generator, and the vehicle is in a parallel driving state, the energy flow of the vehicle is determined to be in a mixed driving mode precursor charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-working state, the rear driving motor is in a driving state, the engine charges the battery through the generator, the current of the power battery is smaller than the set electric quantity value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the engine charges a battery through a generator, the current of a power battery is smaller than the set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive discharging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is driven and the front driving motor is driven, the battery is determined to be in a state of being not charged and not discharged according to the working state of the battery, and the vehicle is determined to be in a serial driving state or a parallel driving state, the energy flow of the vehicle is determined to be in a hybrid mode four-wheel drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode front driving motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear drive motor is in a power generation state, the front drive motor is in a non-power generation state and the vehicle is determined to be in a serial drive state or a parallel drive state, determining that the energy flow of the vehicle is in a hybrid mode and the rear drive motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a power generation state, and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-drive motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the front driving motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-power generation state, the rear driving motor is in a power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the energy recovery state of the rear driving motor;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-drive motor energy recovery state in a pure electric mode;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode precursor state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a drivable mode, the front driving motor is in a non-driving state, the rear driving motor is in a driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode rear driving state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a driving state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-wheel drive state in a pure electric mode;
if the speed of the vehicle is zero, the vehicle is in a serial or parallel driving state, and the engine charges the battery through the generator, the energy flow of the vehicle is determined to be in an idle speed charging state;
if the speed of the vehicle is zero and the battery is not in a charging state, determining that the energy flow of the vehicle is in an idling state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a non-power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode sliding state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a non-power generation state, and the engine is in a working state, determining that the energy flow of the vehicle is in a hybrid mode sliding state;
if the speed of the vehicle is greater than the set speed value and the vehicle is in the non-drivable mode, determining that the energy flow of the vehicle is in the non-drivable mode coasting state.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the parallel driving state refers to the state that the front axle clutch is closed and the engine is in a working state, and the series driving state refers to the state that the front axle clutch is opened and the engine is in a working state;
and when the output torque of the generator is larger than a first set value, determining that the generator is in a driving state, and when the generator is smaller than a second set value, determining that the generator is in an energy recovery state, and when the output torque of the generator is zero, determining that the engine is in an unoperated state.
3. The utility model provides a series-parallel connection structure hybrid vehicle energy flow determining device which characterized in that includes:
the acquisition module is used for acquiring the working state of the whole vehicle, the output current information of the battery, the actual output torque of the front driving motor and the rear driving motor, the output torque of the generator, the working state of the front axle clutch, the working state of the engine, the charging state of the vehicle and the vehicle speed information at the current moment;
the determining module is used for determining an energy flow state according to the whole vehicle working state of the vehicle, current information of the power battery, actual output torque of the front driving motor and the rear driving motor, output torque of the generator, working state of the front axle clutch, working state of the engine, charging state of the vehicle and vehicle speed information;
the display module is used for outputting and displaying the energy flow state;
the determining module specifically comprises:
the step of determining the energy flow state according to the whole vehicle working state of the vehicle, the current information of the power battery, the actual output torque of the front driving motor and the rear driving motor, the output torque of the generator, the working state of the front axle clutch, the working state of the engine, the charging state of the vehicle and the vehicle speed information comprises the following steps:
if the vehicle is in a vehicle stationary state, the vehicle is in a non-drivable mode and the vehicle is in a non-externally connected charging state, determining that the energy flow of the vehicle is in a stationary state;
if the charging gun of the vehicle is inserted and charging is performed, determining that the energy flow of the vehicle is in an externally connected charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an inactive state, the generator is in an inactive state, the engine is in a direct-drive state and the vehicle is in a parallel driving state, determining that the energy flow of the vehicle is in the engine direct-drive state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in an idle state, the engine is in a direct-drive state, the battery is charged through the generator, and the vehicle is in a parallel driving state, the energy flow of the vehicle is determined to be in a mixed driving mode precursor charging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-working state, the rear driving motor is in a driving state, the engine charges the battery through the generator, the current of the power battery is smaller than the set electric quantity value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the engine charges a battery through a generator, the current of a power battery is smaller than the set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive charging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the current of the power battery is larger than a set current value, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear driving discharging state;
if the speed of the vehicle is larger than a set speed value, the vehicle is in a running mode, both front and rear driving motors are in a driving state, the current of the power battery is larger than a set current value, and the vehicle is in a serial driving state, determining that the energy flow of the vehicle is in a hybrid mode four-wheel drive discharging state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a mixed driving mode precursor maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is in a driving state, the front driving motor is in a non-working state, the battery is in a state of neither charging nor discharging, and the vehicle is in a series driving state, determining that the energy flow of the vehicle is in a hybrid mode rear drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear driving motor is driven and the front driving motor is driven, the battery is determined to be in a state of being not charged and not discharged according to the working state of the battery, and the vehicle is determined to be in a serial driving state or a parallel driving state, the energy flow of the vehicle is determined to be in a hybrid mode four-wheel drive maintaining state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode front driving motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the rear drive motor is in a power generation state, the front drive motor is in a non-power generation state and the vehicle is determined to be in a serial drive state or a parallel drive state, determining that the energy flow of the vehicle is in a hybrid mode and the rear drive motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a power generation state, and the vehicle is determined to be in a serial driving state or a parallel driving state, determining that the energy flow of the vehicle is in a hybrid mode four-drive motor energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a power generation state, the rear driving motor is in a non-power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the front driving motor is in an energy recovery state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a non-power generation state, the rear driving motor is in a power generation state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode and the energy recovery state of the rear driving motor;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-drive motor energy recovery state in a pure electric mode;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor is in a driving state, the rear driving motor is in a non-driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode precursor state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a drivable mode, the front driving motor is in a non-driving state, the rear driving motor is in a driving state and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode rear driving state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a driving state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a four-wheel drive state in a pure electric mode;
if the speed of the vehicle is zero, the vehicle is in a serial or parallel driving state, and the engine charges the battery through the generator, the energy flow of the vehicle is determined to be in an idle speed charging state;
if the speed of the vehicle is zero and the battery is not in a charging state, determining that the energy flow of the vehicle is in an idling state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are both in a non-power generation state, and the engine is in a non-working state, determining that the energy flow of the vehicle is in a pure electric mode sliding state;
if the speed of the vehicle is larger than the set speed value, the vehicle is in a running mode, the front driving motor and the rear driving motor are in a non-power generation state, and the engine is in a working state, determining that the energy flow of the vehicle is in a hybrid mode sliding state;
if the speed of the vehicle is greater than the set speed value and the vehicle is in the non-drivable mode, determining that the energy flow of the vehicle is in the non-drivable mode coasting state.
4. An automobile, characterized by comprising the series-parallel structure hybrid automobile energy flow determining device according to claim 3.
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