CN116066551A - Method, device, equipment, storage medium and vehicle for forced downshift of vehicle - Google Patents

Abstract

The present invention relates to the technical field of vehicle control, in particular to a vehicle forced downshift method, device, equipment, storage medium and vehicle. The method includes: acquiring the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; when the engine speed is less than a preset speed threshold, the engine output torque reaches a preset torque threshold, and the accelerator pedal opening is greater than a first preset When the opening threshold and the vehicle acceleration are less than the preset acceleration threshold, a kick-down signal is generated; the kick-down signal is transmitted to the automatic transmission controller of the vehicle, wherein the automatic transmission controller is used to Control transmission kickdown. The invention is used to solve the problem of poor intelligence in the forced downshift starting mode in the prior art.

Description

Vehicle forced downshift method, device, equipment, storage medium and vehicle

technical field

The present invention relates to the technical field of vehicle control, in particular to a vehicle forced downshift method, device, equipment, storage medium and vehicle.

Background technique

For a vehicle equipped with an automatic transmission, when the vehicle enters a steep climb from a flat road or enters a steep climb from a small slope at a high speed and with a heavy load, the automatic transmission is in a high position and the driving resistance Gradually increases, even if the driver fully depresses the accelerator pedal to make the engine output the maximum torque at the current speed, but because the automatic transmission is in a high gear with a small speed ratio, the driving torque at the wheel ends and the driving resistance are in a balanced state. In this situation, the speed of the whole vehicle remains unchanged, and the driver feels that the power of the whole vehicle is insufficient.

In the prior art, for the above situation, for a vehicle equipped with an automatic transmission, when the accelerator pedal is pressed to the bottom and the opening of the accelerator pedal is 100%, and then continues to step down deeply, it will feel like stepping on a button and make a pimple sound. At this time, the downshift acceleration (Kick Down, KD) switch is triggered, the KD switch signal becomes 1, and the engine controller will send the KD switch signal to the automatic transmission controller. When the automatic transmission controller receives the KD switch signal of 1, it judges that the driver needs to increase the power of the vehicle, activates the kickdown function, and immediately lowers the current gear by one or two gears, thereby increasing the transmission capacity. The speed ratio is increased, the driving torque of the wheel end is increased, and the acceleration ability of the vehicle is improved.

However, the current problem is that many drivers do not know that when there is insufficient power, they need to step on the accelerator pedal to 100%, and then continue to step on the accelerator pedal deeply, so that the KD switch function can be activated, so that the automatic transmission Do a downshift. This method cannot automatically identify and solve the insufficient power condition, resulting in poor vehicle control intelligence.

Contents of the invention

The invention provides a vehicle forced downshift method, device, equipment, storage medium and vehicle, which are used to solve the problem of poor intelligence in the kickdown start mode in the prior art.

The present invention provides a vehicle kickdown method, comprising: obtaining the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration of the vehicle; when the engine speed is less than a preset speed threshold and the engine output torque reaches a preset When a torque threshold is set, and the accelerator pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset acceleration threshold, a kickdown signal is generated; and the kickdown signal is transmitted to the The automatic transmission controller of the vehicle described above, wherein the automatic transmission controller is used for controlling transmission kickdown based on the kickdown signal.

According to a vehicle kickdown method provided by the present invention, when the engine speed is lower than a preset speed threshold, and the engine output torque reaches a preset torque threshold, and the accelerator pedal opening is greater than a first preset When the opening threshold and the vehicle acceleration are less than a preset acceleration threshold, generating a kickdown signal includes: acquiring that the engine speed is less than a preset speed threshold, and that the engine output torque reaches a preset torque threshold, and The accelerator pedal opening is greater than a first preset opening threshold and the vehicle acceleration is less than a preset acceleration threshold; when the duration reaches a preset threshold, the kickdown signal is generated.

According to a vehicle kick-down method provided by the present invention, after the said kick-down signal is transmitted to the automatic transmission controller of the vehicle, it also includes: acquiring the accelerator pedal opening degree again; When the accelerator pedal opening degree is less than a second preset opening degree threshold value, a kickdown release signal is generated, wherein the second preset opening degree threshold value is smaller than the first preset opening degree threshold value; The kick-down release signal is transmitted to the automatic transmission controller, wherein the automatic transmission controller is used to control the transmission to release the kick-down based on the kick-down release signal.

According to a vehicle kickdown method provided by the present invention, the acquisition of the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration of the vehicle includes: acquiring the engine speed transmitted by the engine speed sensor; The fuel injection quantity, and based on the fuel injection quantity and the engine speed, obtain the engine output torque; obtain the accelerator pedal opening transmitted by the accelerator pedal sensor; obtain the vehicle speed information transmitted by the instrument of the vehicle, and Based on the vehicle speed information, the vehicle acceleration is acquired.

According to a vehicle kickdown method provided by the present invention, the kickdown signal is a closing signal of a downshift acceleration switch; the kickdown cancellation signal is a disconnection signal of the downshift acceleration switch.

According to a vehicle kick-down method provided by the present invention, the transmitting the kick-down signal to the automatic transmission controller of the vehicle includes: transmitting the kick-down signal to the automatic transmission controller based on the controller local area network The automatic transmission controller of the vehicle; the transmitting the kick-down release signal to the automatic transmission controller includes: based on the controller local area network, transmitting the kick-down release signal to The automatic transmission controller.

The present invention also provides a kickdown device for a vehicle, comprising: an acquisition module for acquiring the vehicle's engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; a processing module for when the engine speed is less than a preset When the rotational speed threshold, and the engine output torque reaches a preset torque threshold, and the accelerator pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset acceleration threshold, a kickdown signal is generated a transmission module, configured to transmit the kick-down signal to an automatic transmission controller of the vehicle, wherein the automatic transmission controller is configured to control a gearbox kick-down based on the kick-down signal.

The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the program, the forced descent of the vehicle as described above can be realized. file method.

The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the vehicle kick-down method described in any one of the above methods is realized.

The present invention also provides a vehicle, which realizes kick-down through any one of the vehicle kick-down methods described above.

The vehicle kickdown method, device, equipment, storage medium and vehicle provided by the present invention obtain the vehicle's engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; when the engine speed is less than the preset speed threshold and the engine output When the torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, a kickdown signal is generated; the kickdown signal is transmitted to the automatic transmission of the vehicle A gearbox controller, wherein the automatic transmission controller is used to control the transmission kickdown based on the kickdown signal. In the above process, the driving state of the vehicle is determined in an all-round and fast manner through the four vehicle driving information of engine speed, engine output torque, accelerator pedal opening and vehicle acceleration, and the generated kick-down signal is used to control the gearbox to complete the kick-down . This process can automatically identify whether the vehicle has insufficient power based on the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration, and automatically complete the kick-down process, which improves the intelligence of the vehicle kick-down process.

Description of drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are the For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is one of the schematic flow charts of the vehicle kick-down method provided by the present invention;

Fig. 2 is the second schematic flow diagram of the vehicle kick-down method provided by the present invention;

Fig. 3 is a structural schematic diagram of a vehicle kick-down device provided by the present invention;

Fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

For the existing technology, the vehicle enters the working condition of climbing a large slope from a flat road or enters a large slope climbing from a small slope, resulting in insufficient power, and further detailed analysis is made. Taking a specific experimental data as an example, from the test From the 2393rd second, the vehicle under high speed and heavy load enters the steep slope climbing condition, and the speed begins to decrease. At 2410 seconds, the vehicle speed dropped to 86.92km/h. From the 2410th second to the 2436th second, that is, within 26 seconds, even if the driver depresses the accelerator pedal to 100% opening, the engine outputs the corresponding maximum torque at 1130 rpm, but because the automatic transmission controller It is at 1130 rpm but not lower than the downshift speed point, so the highest 12th gear has been maintained, resulting in a balance between the wheel drive torque and driving resistance, the vehicle speed has always remained at 86.92km/h, and the vehicle acceleration has always been 0. During the 26 seconds, the engine kept outputting the maximum torque at 1130 rpm, and the driver heard a "thumping" sound in the cab, which produced a strong feeling that the vehicle was underpowered.

For vehicles equipped with automatic transmission, when the accelerator pedal is pressed to the bottom and the opening of the accelerator pedal is 100%, then the KD switch will be activated to trigger the forced downshift function. But at present, many drivers don't know that the KD switch function can only be activated after stepping on the accelerator pedal to 100%, and then continue to step down on the accelerator pedal deeply.

Based on the above, the present application provides a vehicle kick-down method, device, equipment, storage medium and vehicle to realize intelligent kick-down. The vehicle kick down method, device, equipment, storage medium and vehicle of the present invention will be described below with reference to FIGS. 1 to 4 .

In one embodiment, the vehicle kickdown method can be implemented in any device capable of data processing, such as a processor, a controller, and the like. Preferably, the method is implemented in the engine controller, and the following embodiments are introduced by taking the engine controller as an example. As shown in Figure 1, the implementation process of the vehicle forced downshift method is as follows:

Step 101, acquiring the engine speed, engine output torque, accelerator opening and vehicle acceleration of the vehicle.

In this embodiment, during the driving process of the vehicle, first collect information that can determine the driving state of the vehicle, specifically, the information includes the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration, so as to analyze these information, to determine whether to activate the kick-down function. It should be noted that the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration can be collected continuously after the vehicle is started, so that it can respond in time when a forced downshift is required.

In this embodiment, four kinds of vehicle driving information, including engine speed, engine output torque, accelerator pedal opening and vehicle acceleration, can comprehensively identify the driving state of the vehicle and make the control of the kickdown function more precise. At the same time, the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration are relatively easy to collect vehicle driving information, and the collection time is short, so that the vehicle driving state can be quickly determined, and the timeliness and accuracy of kickdown can be improved.

In one embodiment, the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration of the vehicle are obtained. The specific implementation process is as follows: obtain the engine speed transmitted by the engine speed sensor; obtain the fuel injection quantity of the vehicle, and based on the fuel injection quantity and The engine speed is obtained to obtain the engine output torque; the accelerator pedal opening transmitted by the accelerator pedal sensor is obtained; the vehicle speed information transmitted by the instrument of the vehicle is obtained, and the vehicle acceleration is obtained based on the vehicle speed information.

In this embodiment, the engine controller obtains the engine speed, the engine output torque, the opening degree of the accelerator pedal and the vehicle acceleration respectively. Specifically, the engine is equipped with an engine speed sensor, and the engine speed sensor collects the engine speed in real time, and transmits the engine speed to the engine controller. The fuel injection quantity of the vehicle can be collected by the relevant device configured in the fuel tank, and then transmitted to the engine controller; based on the fuel injection quantity and engine speed, the corresponding engine output torque can be determined. For example, as shown in Table 1, the fuel injection The relationship between the quantity and the engine speed corresponding to the engine output torque is as follows:

Table 1 Example diagram of the relationship between engine speed, fuel injection quantity and engine output torque

In Table 1, when the engine speed (abbreviated as speed in Table 1) is 200 revolutions per minute (r/min), and the fuel injection quantity is 10 milligrams (mg), the corresponding engine output torque is 100 Newton meters (Nm) ,And so on.

The accelerator pedal of the vehicle is equipped with an accelerator pedal sensor, which can detect the opening degree of the accelerator pedal and transmit the opening degree of the accelerator pedal to the engine controller. The instrument configured on the vehicle can detect the vehicle speed information during the driving process in real time. After the instrument transmits the vehicle speed information to the engine controller, the engine can calculate the vehicle acceleration based on the vehicle speed information.

It should be noted that the acquisition methods of the above-mentioned engine speed, engine output torque, accelerator pedal opening and vehicle acceleration are the preferred methods provided by this application. After collecting the engine speed, engine output torque, accelerator pedal opening or vehicle acceleration, it is transmitted to the engine controller for processing.

Step 102, when the engine speed is less than the preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, generate a mandatory downshift signal.

In this embodiment, after obtaining the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration, the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration are judged respectively, when the engine speed is less than When the speed threshold is preset, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, the kickdown signal is used to implement the kickdown Function.

In this embodiment, the preset rotational speed threshold, the preset torque threshold, the first preset opening threshold and the preset acceleration threshold can be set respectively according to empirical data, experimental data, vehicle configuration and/or actual needs, preferably Yes, the preset speed threshold can be set to 1400 revolutions per minute (r/min), the preset torque threshold can be set to the maximum set value under the current engine speed, the first preset opening threshold is set to 100%, and the preset The acceleration threshold was set at 0.01 meters per second squared (m/s ² ).

In one embodiment, when the engine speed is less than the preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, The kickdown signal is generated, and the specific implementation process is as follows: the engine speed is less than the preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset The duration of the acceleration threshold; when the duration reaches a preset duration threshold, a kickdown signal is generated.

In this embodiment, when the engine speed is less than the preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, it is detected that the The duration of the state is to obtain the duration, and then when it is determined that the duration reaches the preset duration threshold, a kick-down signal is generated immediately. Wherein, the preset duration threshold can be set according to experience, experimental data and actual needs. By detecting the duration, it is possible to avoid false triggering of the kick-down function and ensure the driving safety of the vehicle.

Step 103 , transmitting the kick-down signal to the automatic transmission controller of the vehicle, wherein the automatic transmission controller is used to control the transmission kick-down based on the kick-down signal.

In this embodiment, after the engine controller generates the kick-down signal, it transmits the kick-down signal to the automatic transmission controller of the vehicle. The automatic transmission controller activates the transmission kick-down operation based on the kick-down signal, increases the transmission speed ratio, and increases the wheel-end driving torque to solve the power shortage problem.

In one embodiment, after the forced downshift signal is transmitted to the automatic transmission controller of the vehicle, the accelerator pedal opening is acquired again; when the acquired accelerator pedal opening is smaller than the second preset opening threshold, a mandatory A downshift release signal, wherein the second preset opening threshold is smaller than the first preset opening threshold; the kick-down release signal is transmitted to the automatic transmission controller, wherein the automatic transmission controller is used to release the kick-down based on The signal controls the gearbox to release the kickdown.

In this embodiment, the kick-down function is automatically activated based on the kick-down signal. After the vehicle speed increases and the vehicle passes through the climbing condition smoothly, the driver will notice that the driver will release the accelerator pedal autonomously. At this time, if the accelerator pedal opening is detected When it is smaller than the second preset opening threshold, a kick-down release signal is generated and transmitted to the automatic transmission controller to cancel the transmission kick-down mode. Wherein, the second preset opening threshold can be set according to empirical data, experimental data, vehicle configuration and/or actual needs, preferably, the second preset opening threshold can be set to 90%.

In this embodiment, by reasonably setting the second preset opening threshold, the forced downshift can be released at a reasonable time to ensure the driving safety of the vehicle.

In one embodiment, the kick-down signal is transmitted to the automatic transmission controller of the vehicle, and the specific implementation process is as follows: based on the controller local area network, the kick-down signal is transmitted to the automatic transmission controller of the vehicle; The signal is transmitted to the automatic transmission controller, including: based on the controller local area network, the kick-down release signal is transmitted to the automatic transmission controller.

In this embodiment, the engine controller and the automatic transmission controller can be connected through a controller area network (Controller Area Network, CAN), so as to facilitate the transmission of the kick-down signal and the kick-down contact signal. Furthermore, the engine controller can also communicate with components configured on the vehicle such as instrumentation through CAN, so as to facilitate the transmission of data such as vehicle speed information.

In one embodiment, the kick down signal is a closing signal of a kick down acceleration (Kick Down, KD) switch; the kick down release signal is a disconnection signal of a kick down acceleration switch.

In this embodiment, the kick-down signal and the kick-down cancel signal can be analog signals related to different KD switches respectively. Specifically, the kick-down signal can be assigned a value of 1 for the KD switch signal, and the kick-down cancel signal can be Assign a value of 0 to the KD switch signal. In this way, it is convenient to realize automatic kick-down on the basis of existing vehicles.

In one embodiment, after the accelerator pedal opening is acquired again, if the acquired accelerator pedal opening is greater than or equal to the second preset opening threshold, the accelerator pedal opening is continuously acquired until the accelerator pedal opening is less than the second preset opening threshold. Preset opening threshold.

In this embodiment, if the accelerator pedal opening obtained again is greater than or equal to the second preset opening threshold, it indicates that the current working condition of the vehicle still requires kickdown, and at this time, the gearbox kickdown operation continues to be effective . However, during the continuation of the kick-down operation, it is still necessary to continuously obtain the opening of the accelerator pedal. Once the opening of the accelerator pedal is smaller than the second preset opening threshold, the kick-down mode of the gearbox is released in time to resume normal driving of the vehicle, ensuring Vehicle safety, enhance driver experience.

In a specific embodiment, as shown in Figure 2, the vehicle kickdown method is completed by a program preset in the engine controller, and the specific process of realization is as follows:

Step 201: The vehicle is started, the program starts to run, and step 202 is executed.

Step 202: Determine whether the following four conditions are met at the same time: the engine speed is less than the preset speed threshold (for example, the preset speed threshold is 1400r/min), and the engine output torque reaches the preset torque threshold (for example, the first preset opening degree When the threshold is 100%, the preset torque threshold is the maximum torque at the current speed), and the accelerator pedal opening is greater than the first preset opening threshold (for example, the first preset opening threshold is 100%), and The vehicle acceleration is less than the preset acceleration threshold (for example, the preset acceleration threshold is 0.01m/s2); and the duration that satisfies the above four conditions at the same time is obtained, and it is judged whether the duration is greater than the preset duration threshold (for example, the preset duration threshold is 3 seconds), if yes, execute step 203; if not, execute step 207.

Step 203: It is determined that the vehicle enters into an insufficient power condition, and step 204 is executed.

Step 204: Although the driver does not continue to step on the pedal deeply to trigger the KD switch signal after stepping on the accelerator opening to 100%, the engine controller generates a kick-down signal after recognizing that the vehicle enters an insufficient power condition, That is, the KD switch signal is assigned a value of 1, which is sent to the automatic transmission controller through the CAN bus, and the forced downshift operation of the transmission is started, and step 205 is executed.

Step 205: Determine whether the opening of the accelerator pedal is less than the second preset opening threshold (for example, the second preset opening threshold is 90%), if it is determined that the driver no longer needs the strong power mode, then perform step 206, if not , execute step 204, and continue to keep the gearbox in the forced downshift state.

Step 206: The engine controller assigns the KD switch signal to 0, and sends it to the automatic transmission controller through the CAN bus, and the transmission exits the kick-down mode, and then executes step 207.

Step 207: The vehicle runs under normal conditions, and continues to observe until the next underpowered condition or the vehicle is turned off.

The vehicle kick-down device provided by the present invention is described below, and the vehicle kick-down device described below and the vehicle kick-down method described above can be referred to in correspondence. As shown in Figure 3, the vehicle kickdown device includes:

An acquisition module 301, configured to acquire the engine speed, engine output torque, accelerator pedal opening and vehicle acceleration of the vehicle;

The processing module 302 is configured to be used when the engine speed is less than the preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold , generating a kickdown signal;

The transmission module 303 is configured to transmit the forced downshift signal to the automatic transmission controller of the vehicle, wherein the automatic transmission controller is used to control the transmission downshift based on the forced downshift signal.

In one embodiment, the processing module 302 is configured to obtain that the engine speed is less than a preset speed threshold, and the engine output torque reaches a preset torque threshold, and the accelerator pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset The duration of the acceleration threshold; when the duration reaches a preset duration threshold, a kickdown signal is generated.

In one embodiment, the vehicle kick-down device further includes a release module, the release module is used to obtain the accelerator pedal opening again after the kick-down signal is transmitted to the automatic transmission controller of the vehicle; In the case of less than the second preset opening threshold, a kick-down release signal is generated, wherein the second preset opening threshold is smaller than the first preset opening threshold; the kick-down release signal is transmitted to the automatic transmission controller , wherein the automatic transmission controller is used to control the transmission to release the kick-down based on the kick-down release signal.

In one embodiment, the obtaining module 301 is configured to obtain the engine speed transmitted by the engine speed sensor; obtain the fuel injection quantity of the vehicle, and obtain the engine output torque based on the fuel injection quantity and the engine speed; obtain the accelerator pedal opening torque transmitted by the accelerator pedal sensor. Acquire the vehicle speed information transmitted by the instrument of the vehicle, and obtain the vehicle acceleration based on the vehicle speed information.

In one embodiment, the kickdown signal is a closing signal of the downshift acceleration switch; the kickdown release signal is a disconnection signal of the downshift acceleration switch.

In one embodiment, the transmission module 303 is configured to transmit the kick-down signal to the automatic transmission controller of the vehicle based on the controller area network;

In one embodiment, the release module is configured to transmit the kick-down release signal to the automatic transmission controller based on the controller area network.

Figure 4 illustrates a schematic diagram of the physical structure of an electronic device, as shown in Figure 4, the electronic device may include: a processor (processor) 401, a communication interface (Communications Interface) 402, a memory (memory) 403 and a communication bus 404, Wherein, the processor 401 , the communication interface 402 , and the memory 403 communicate with each other through the communication bus 404 . The processor 401 can call the logic instructions in the memory 403 to execute the vehicle kick down method, the method includes: acquiring the vehicle's engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; when the engine speed is less than a preset speed threshold , and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, a kick-down signal is generated; the kick-down signal is transmitted to An automatic transmission controller of the vehicle, wherein the automatic transmission controller is configured to control the transmission kickdown based on the kickdown signal.

In addition, the above logic instructions in the memory 403 may be implemented in the form of software function units and when sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

On the other hand, the present invention also provides a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer During execution, the computer can execute the vehicle kick-down method provided by each of the above embodiments, the method includes: acquiring the vehicle's engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; when the engine speed is less than a preset speed threshold, And when the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, generate a kickdown signal; transmit the kickdown signal to the vehicle An automatic transmission controller, wherein the automatic transmission controller is used to control the transmission kickdown based on the kickdown signal.

In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the vehicle kick-down method provided by the above-mentioned embodiments is implemented, and the method includes : Obtain the vehicle's engine speed, engine output torque, accelerator pedal opening and vehicle acceleration; when the engine speed is less than a preset speed threshold, and the engine output torque reaches the preset torque threshold, and the accelerator pedal opening is greater than the first preset opening threshold, and the vehicle acceleration is less than the preset acceleration threshold, generate a kick-down signal; transmit the kick-down signal to the automatic transmission controller of the vehicle, wherein the automatic transmission controller is used to control the shift based on the kick-down signal box kickdown.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative efforts.

Through the above description of the implementations, those skilled in the art can clearly understand that each implementation can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic discs, optical discs, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments.

In yet another aspect, the present invention also provides a vehicle, which realizes kick-down through the vehicle kick-down method provided in any one of the above embodiments. Specifically, the vehicle provided by the present invention may be any one of heavy trucks, trailers, excavators, bolter diggers, bulldozers, road rollers, and concrete pump trucks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A forced downshift method for a vehicle, comprising:

acquiring the engine speed, the engine output torque, the accelerator pedal opening and the vehicle acceleration of the vehicle;

generating a forced downshift signal when the engine speed is less than a preset speed threshold, the engine output torque reaches a preset torque threshold, the accelerator pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset acceleration threshold;

transmitting the forced downshift signal to an automatic transmission controller of the vehicle, wherein the automatic transmission controller is configured to control a forced downshift of the transmission based on the forced downshift signal.

2. The method according to claim 1, characterized in that the generating a forced downshift signal in the case where the engine speed is less than a preset speed threshold and the engine output torque reaches a preset torque threshold and the accelerator pedal opening is greater than a first preset opening threshold and the vehicle acceleration is less than a preset acceleration threshold, includes:

acquiring duration time when the engine speed is smaller than a preset speed threshold, the engine output torque reaches a preset torque threshold, the accelerator pedal opening is larger than a first preset opening threshold, and the vehicle acceleration is smaller than a preset acceleration threshold;

and when the duration reaches a preset duration threshold, generating the forced downshift signal.

3. The method of a forced downshift of a vehicle according to claim 1, further comprising, after said transmitting said forced downshift signal to an automatic transmission controller of said vehicle:

acquiring the opening of the accelerator pedal again;

generating a forced downshift release signal when the re-acquired accelerator pedal opening is smaller than a second preset opening threshold, wherein the second preset opening threshold is smaller than the first preset opening threshold;

transmitting the forced downshift release signal to the automatic transmission controller, wherein the automatic transmission controller is configured to control the transmission to release the forced downshift based on the forced downshift release signal.

4. The method of forced downshift of a vehicle according to claim 1, wherein said acquiring an engine speed, an engine output torque, an accelerator pedal opening, and a vehicle acceleration of the vehicle comprises:

acquiring the engine speed transmitted by an engine speed sensor;

acquiring the fuel injection quantity of the vehicle, and acquiring the engine output torque based on the fuel injection quantity and the engine speed;

acquiring the opening of the accelerator pedal transmitted by an accelerator pedal sensor;

and acquiring vehicle speed information transmitted by an instrument of the vehicle, and acquiring the vehicle acceleration based on the vehicle speed information.

5. The forced downshift method according to claim 3, wherein the forced downshift signal is a closing signal of a downshift accelerator switch;

the forced downshift release signal is an off signal of the downshift accelerator switch.

6. The method of a forced downshift of a vehicle according to claim 3, wherein said transmitting said forced downshift signal to an automatic transmission controller of said vehicle comprises:

transmitting the forced downshift signal to the automatic transmission controller of the vehicle based on a controller area network;

the transmitting the forced downshift release signal to the automatic transmission controller includes:

the forced downshift release signal is transmitted to the automatic transmission controller based on the controller area network.

7. A forced downshift apparatus for a vehicle, characterized by comprising:

the acquisition module is used for acquiring the engine rotating speed, the engine output torque, the accelerator pedal opening and the vehicle acceleration of the vehicle;

the processing module is used for generating a forced downshift signal under the condition that the engine rotating speed is smaller than a preset rotating speed threshold value, the engine output torque reaches a preset torque threshold value, the accelerator pedal opening is larger than a first preset opening threshold value and the vehicle acceleration is smaller than a preset acceleration threshold value;

and a transmission module for transmitting the forced downshift signal to an automatic transmission controller of the vehicle, wherein the automatic transmission controller is configured to control a forced downshift of the transmission based on the forced downshift signal.

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the vehicle forced downshift method according to any one of claims 1 to 6 when executing the program.

9. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the vehicle forced downshift method according to any one of claims 1 to 6.

10. A vehicle characterized in that the vehicle achieves a forced downshift by the vehicle forced downshift method according to any one of claims 1 to 6.

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