CN110816247A - Hybrid system and its control method - Google Patents

Abstract

The present invention relates to the technical field of transmissions, in particular to a hybrid power system and a control method thereof. The hybrid system includes an engine, a clutch, a motor and a transmission. The engine is selectively connected to one end of the transmission through the clutch, and the motor is selectively connected to the other end of the transmission. The hybrid system also includes a first shift mechanism and a second shift mechanism that are independent of each other. gear mechanism, the first gear shift mechanism is arranged at the gear shift position of the engine, and is used to perform the gear shifting operation between the engine and the transmission, and the second gear shift mechanism is arranged at the first gear shift position of the motor, and is used to execute the gear shift operation of the motor Shift operation with the transmission. In the present invention, a first shift mechanism and a second shift mechanism that are independent of each other are arranged in the hybrid power system, so that when the first shift mechanism drives the engine and the transmission to be separated, the motor and the transmission can be driven by the second shift mechanism. The transmission is coupled to maintain the speed of the transmission at a steady state.

Description

Hybrid system and its control method

technical field

The present invention relates to the technical field of transmissions, in particular to a hybrid power system and a control method thereof.

Background technique

This section provides merely background information related to the present disclosure and is not necessarily prior art.

The power interruption of the existing electronically controlled mechanical transmission (Automated Mechanical Transmission, AMT for short) when shifting gears is a major disadvantage of the AMT. The power interruption will cause sudden changes in vehicle acceleration and even shocks, thereby causing occupant discomfort.

SUMMARY OF THE INVENTION

The present invention provides a hybrid power system, which aims to at least solve the technical problem of power loss of the transmission during the shifting process and to optimize the shifting speed of some working conditions. The purpose is achieved through the following technical solutions:

A first aspect of the present invention provides a hybrid power system. The hybrid power system includes an engine, a clutch, a motor and a transmission. The engine is selectively connected to one end of the transmission through the clutch, and the motor is selectively connected to the other end of the transmission. The hybrid power system It also includes a first shifting mechanism and a second shifting mechanism that are independent of each other. The first shifting mechanism is arranged at the shift position of the engine and is used to perform the shifting operation between the engine and the transmission. The second shifting mechanism is arranged At the first shift position of the electric motor, it is used to perform the shifting operation between the electric motor and the transmission.

In the present invention, a first shift mechanism and a second shift mechanism that are independent of each other are arranged in the hybrid power system, so that when the first shift mechanism drives the engine and the transmission to be separated, the motor and the transmission can be driven by the second shift mechanism. The transmission is coupled to maintain the speed of the transmission at a steady state.

Further, the first shift mechanism is a synchronizer structure, and the electric motor further includes a second shift position, and the second shift position and the shift position of the engine form a common gear position at the synchronizer structure.

Further, the second shifting mechanism is a sliding sleeve structure, and the sliding sleeve structure controls the combination or separation of the motor and the transmission at the first shifting position.

Further, the first gear shift of the electric motor is a single gear, and when the second shifting mechanism combines the electric motor with the transmission, the electric motor drives the transmission to run at a fixed rotational speed.

A second aspect of the present invention also provides a control method for a hybrid power system. The control method for the hybrid power system is implemented according to the hybrid power system of the first aspect of the present invention. The control method for the hybrid power system includes the steps of: obtaining a hybrid power system. The power system is in the shifting state; according to the shifting state is the static gearing state, the first shifting mechanism is controlled to drive the engine and the transmission to be combined at the shifting position, and the second shifting mechanism is controlled to drive the motor and the transmission to be in the first gear. combined.

Further, after obtaining that the hybrid power system is in the gear shifting state, the step further includes: according to the shifting state being the static shifting state, controlling the first shifting mechanism to drive the engine and the transmission to separate at the shifting position, and controlling the second shifting. The mechanism drive motor is disengaged from the transmission at first gear.

Further, after obtaining that the hybrid power system is in a gear shifting state, the step further includes: according to the shifting state being a downshifting state and performing a shifting operation, controlling the first shifting mechanism to drive the engine and the transmission to separate at the shifting position, and simultaneously. The second shifting mechanism is controlled to drive the motor and the transmission to disengage at the first gear.

Further, after obtaining that the hybrid power system is in a gear shifting state, the step further includes: according to the shifting state being a downshifting state and performing a gear shifting operation, controlling the first shifting mechanism to drive the engine to combine with the transmission at the shifting position, and at the same time. The second shifting mechanism is controlled to drive the motor to be combined with the transmission at the first gear.

Further, after obtaining that the hybrid power system is in a gear shifting state, the step further includes: according to the shifting state being an upshifting state, controlling the second shifting mechanism to drive the motor to combine with the transmission at the first gear position, and performing adjustment on the transmission through the motor. speed operation; according to the completion of the speed regulation operation, the first shifting mechanism is controlled to drive the engine to combine with the transmission at the shifting position.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a schematic structural diagram of a hybrid power system according to an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a control method of a hybrid power system according to an embodiment of the present invention;

10, engine; 11, clutch; 12, transmission; 13, motor; 14, first shift mechanism; 15, second shift mechanism.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" can also be intended to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising" and "having" are inclusive and thus indicate the presence of stated features, elements and/or components, but do not exclude the presence or addition of one or more other features, elements, components , and/or their combination.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be described by these terms limit. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," "third," and "fourth," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present invention, unless otherwise expressly specified and limited, the terms "arrangement" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; It can be directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "on", "outer", "between" room" etc. This spatially relative term is intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "above the other elements or features" above features". Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in FIG. 1 , according to an embodiment of the present invention, a first aspect of the present invention provides a hybrid power system. The hybrid power system includes an engine 10 , a clutch 11 , a transmission 12 and a motor 13 , and the engine 10 communicates with the transmission through the clutch 11 . One end of 12 is selectively connected, and the motor 13 is selectively connected with the other end of the transmission 12. The hybrid system also includes a first shift mechanism 14 and a second shift mechanism 15 that are independent of each other, and the first shift mechanism 14 is arranged on the engine. The shift position of the motor 10 (not shown in the figure) is used to perform the shift operation between the engine 10 and the transmission 12, and the second shift mechanism 15 is provided at the first shift position of the electric motor 13 to execute the shift operation. Shifting operation between the electric motor 13 and the transmission 12 .

In the present embodiment, by providing the first shift mechanism 14 and the second shift mechanism 15 independent of each other in the hybrid system, the first shift mechanism 14 can drive the engine 10 and the transmission 12 in a disconnected state. The motor 13 is coupled with the transmission 12 through the second shifting mechanism 15 to maintain the speed of the transmission 12 in a stable state.

Continuing to refer to FIG. 1 , according to an embodiment of the present invention, the first shift mechanism 14 is a synchronizer structure, the motor 13 further includes a second shift position, and the second shift position and the shift position of the engine 10 are in the synchronizer structure A common gear is formed at the position, and the synchronizer structure is used to control the engine 10 and the motor 13 to synchronously pick up the gear and synchronously engage the gear. The second shifting mechanism 15 is a sliding sleeve structure, the second shifting mechanism 15 controls the motor 13 to be combined or separated from the transmission 12 at the first shifting position, and the first shifting position of the motor 13 is a single gear, and the first shifting position of the motor 13 is a single gear. When the second shift mechanism 15 combines the motor 13 with the transmission 12, the motor 13 drives the transmission 12 to operate at a fixed rotational speed.

As shown in FIG. 2 , the second aspect of the present invention also provides a control method for a hybrid power system. The control method for the hybrid power system is implemented according to the hybrid power system of the first aspect of the present invention. The control method of the hybrid power system The method includes the steps of: S10, acquiring that the hybrid power system is in a gear shifting state, and controlling the hybrid power system to perform a torque clearing operation according to the hybrid power system being in a gear shifting state; S12, according to the completion of the torque clearing operation, and the gear shifting state is a static gear shifting state , controlling the first shifting mechanism 14 to drive the engine 10 to combine with the transmission 12 at the shifting position, and controlling the second shifting mechanism 15 to drive the motor 13 to combine with the transmission 12 at the first gear;

Further, after step S10, it also includes: controlling the first shift mechanism 14 to drive the engine 10 and the transmission 12 to separate at the shift position according to the shift state being the static shift state, and simultaneously controlling the second shift mechanism 15 to drive the motor 13 is disengaged from the transmission 12 at first gear.

Further, after step S10, it further includes: according to the shifting state being the downshifting state and performing the shifting operation, controlling the first shifting mechanism 14 to drive the engine 10 to separate from the transmission 12 at the shifting position, and controlling the second shifting mechanism 15 The drive motor 13 is disengaged from the transmission 12 at first gear.

Further, after step S10, it further includes: according to the shifting state being the downshifting state and performing the gear shifting operation, controlling the first shifting mechanism 14 to drive the engine 10 to combine with the transmission 12 at the shifting position, and simultaneously controlling the second shifting The mechanism 15 drives the motor 13 in combination with the transmission 12 in first gear.

Further, after step S10, it further includes: according to the shifting state being an upshift state, driving the engine 10 to separate from the current gear through the first shifting mechanism 14, and controlling the second gear according to the separation of the first shifting mechanism 14 from the current gear The shifting mechanism 15 is combined with the first shifting position of the motor 13; the hybrid system is controlled to perform a speed regulation operation on the transmission 12; according to the completion of the speed regulating operation, the engine 10 and the transmission 12 are driven in the target gear through the first shifting mechanism 14 combined.

The hybrid power system of the present invention can realize the uninterrupted power of the AMT through the cooperative driving of the drive motor 13 and the engine 10 during the dynamic shifting process, thereby improving the comfort of the whole vehicle. The first shifting mechanism 14 and the second shifting mechanism 15 do not act simultaneously during the dynamic shifting process, so that the second shifting mechanism 15 can maintain the power transmission of the transmission at the current position, so as to solve the problem of power interruption in the hybrid system. Technical issues and long shift times in certain conditions.

Further, in the static shifting process of the hybrid power system (when the rotational speed of the engine 10 or the vehicle speed is 0), the first shifting mechanism 14 and the second shifting mechanism 15 are used to act at the same time, thereby shortening the shifting time and improving Responsiveness of the hybrid system.

It should be noted that the above-mentioned embodiments merely describe the technical features related to the present invention in the hybrid power system, which does not mean that the hybrid power system only has the above-mentioned technical features. No further description will be given.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions, All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (9)

1. A hybrid system is characterized by comprising an engine, a clutch, a motor and a transmission, wherein the engine is selectively connected with one end of the transmission through the clutch, the motor is selectively connected with the other end of the transmission, the hybrid system further comprises a first gear shifting mechanism and a second gear shifting mechanism which are independent of each other, the first gear shifting mechanism is arranged at a gear shifting position of the engine and used for executing gear shifting operation between the engine and the transmission, and the second gear shifting mechanism is arranged at a first gear shifting position of the motor and used for executing gear shifting operation between the motor and the transmission.

2. The hybrid powertrain system of claim 1, wherein the first shift mechanism is a synchronizer structure and the electric machine further includes a second shift position that forms a common gear with a shift position of the engine at the synchronizer structure.

3. The hybrid system according to claim 1, wherein the second shift mechanism is a sliding sleeve structure that controls the motor to be coupled to or decoupled from the transmission at the first shift position.

4. The hybrid powertrain system of claim 3, wherein the first shift position of the electric motor is a single shift position, and the electric motor drives the transmission to operate at a fixed rotational speed with the second shift mechanism coupling the electric motor with the transmission.

5. A control method of a hybrid system, characterized in that the control method of a hybrid system is implemented according to the hybrid system of any one of claims 1 to 4, the control method of a hybrid system comprising the steps of:

acquiring that the hybrid power system is in a gear shifting state;

and controlling the first gear shifting mechanism to drive the engine to be combined with the transmission at a gear shifting position and controlling the second gear shifting mechanism to drive the motor to be combined with the transmission at the first gear position according to the condition that the gear shifting state is a static gear engaging state.

6. The hybrid system control method of claim 5, wherein the root access hybrid system further comprises, after being in a shift state, the steps of:

and controlling the first gear shifting mechanism to drive the engine to be separated from the transmission at a gear shifting position and controlling the second gear shifting mechanism to drive the motor to be separated from the transmission at the first gear position according to the condition that the gear shifting state is a static gear-disengaging state.

7. The hybrid system control method of claim 5, wherein the root access hybrid system further comprises, after being in a shift state, the steps of:

and controlling the first gear shifting mechanism to drive the engine to be separated from the transmission at the gear shifting position and simultaneously controlling the second gear shifting mechanism to drive the motor to be separated from the transmission at the first gear position according to the gear shifting state which is a downshifting state and executing a gear-disengaging operation.

8. The hybrid system control method of claim 5, wherein the root access hybrid system further comprises, after being in a shift state, the steps of:

and controlling the first gear shifting mechanism to drive the engine to be combined with the transmission at the gear shifting position and simultaneously controlling the second gear shifting mechanism to drive the motor to be combined with the transmission at the first gear position according to the gear shifting state which is a downshifting state and gear engaging operation.

9. The hybrid system control method according to claim 5, characterized by the step of obtaining that the hybrid system is in a shift state further comprising:

controlling the second gear shifting mechanism to drive the motor to be combined with the transmission at the first gear position according to the condition that the gear shifting state is an upshift state, and executing speed regulation operation on the transmission through the motor;

and controlling the first gear shifting mechanism to drive the engine and the transmission to be combined at the gear shifting position according to the completion of the speed regulating operation.

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