Vehicle starting control method and device, electronic equipment and vehicle

Abstract

The application provides a vehicle starting control method and device, an electronic device and a vehicle, and belongs to the technical field of vehicles. When a starting instruction for an electric vehicle is received, the starting state of the electric vehicle is acquired. When the starting state is a braking working state, the electric vehicle is driven at a first torque output rate. After the starting state is switched from the braking working state to a braking idle state, the first torque output rate is switched to a second torque output rate. The second torque output rate is smaller than the first torque output rate. Different torque output powers are output according to different starting states when the vehicle starts, so that the torque output power of the vehicle can gently rise when the vehicle starts, the push-back feeling caused by the starting of the vehicle is reduced, the vehicle is prevented from shaking, and the starting smoothness and comfort are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a vehicle starting control method and device, an electronic device, and a vehicle. BACKGROUND

[0002] With the continuous development of science and technology, electric vehicles have become a common type of modern life with their green and pollution-free characteristics. In the related art, when an electric vehicle starts, because the automatic vehicle hold (AVH) or the electrical park brake (EPB) limits the starting state, the electric vehicle needs to be released from the limitation and then driven at a fixed torque output rate.

[0003] However, the torque output rate of the electric vehicle is wide and relatively abrupt, and when the electric vehicle is released from the limitation, the abrupt and fixed single torque output rate causes a pushback feeling, and even causes vehicle shaking, and the starting smoothness and comfort are low. SUMMARY

[0004] Therefore, the embodiments of the present application provide a vehicle starting control method and device, an electronic device, and a vehicle, which can solve the problem of the fixed torque output rate causing a pushback feeling and low starting smoothness and comfort in the related art.

[0005] According to a first aspect of the present application, a vehicle starting control method is provided, and the method comprises the following steps:

[0006] When a starting instruction for the electric vehicle is received, a starting state of the electric vehicle is acquired.

[0007] When the starting state is a brake working state, the electric vehicle is driven at a first torque output rate.

[0008] When the starting state is switched from the brake working state to a brake idle state, the first torque output rate is switched to a second torque output rate, and the first torque output rate is less than the second torque output rate.

[0009] Optionally, the step of switching the first torque output rate to the second torque output rate comprises the following steps:

[0010] The first torque output rate is uniformly accelerated to the second torque output rate.

[0011] In the case of acceleration to the second torque output rate, the electric vehicle is driven at the second torque output rate.

[0012] Optionally, the control of the uniform acceleration of the first torque output rate to the second torque output rate comprises:

[0013] The control of the uniform acceleration of the first torque output rate to the second torque output rate comprises:

[0014] Optionally, the control of the uniform acceleration of the first torque output rate to the second torque output rate comprises:

[0015] The growth rate of the first torque output rate to the second torque output rate is determined according to the actual vehicle speed of the electric vehicle;

[0016] The first torque output rate is uniformly accelerated to the second torque output rate based on the growth rate.

[0017] According to a second aspect of the present application, a vehicle starting control device is provided, and the device comprises:

[0018] An acquisition module is configured to acquire a starting state of an electric vehicle when a starting instruction for the electric vehicle is received;

[0019] A driving module is configured to drive the electric vehicle at a first torque output rate when the starting state is a braking working state;

[0020] A switching module is configured to switch the first torque output rate to a second torque output rate when the starting state is switched from the braking working state to a braking idle state, the first torque output rate being less than the second torque output rate.

[0021] Optionally, the switching module is further configured to:

[0022] The control of the uniform acceleration of the first torque output rate to the second torque output rate comprises:

[0023] In the case of acceleration to the second torque output rate, the electric vehicle is driven at the second torque output rate.

[0024] Optionally, the switching module is further configured to:

[0025] The control of the uniform acceleration of the first torque output rate to the second torque output rate comprises:

[0026] Optionally, the switching module is further configured to:

[0027] The growth rate of the first torque output rate to the second torque output rate is determined according to the actual vehicle speed of the electric vehicle;

[0028] The first torque output rate is uniformly accelerated to the second torque output rate based on the growth rate.

[0029] According to a third aspect of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the vehicle start control method according to the first aspect when executing the computer program.

[0030] According to a fourth aspect of the present application, a computer readable storage medium is provided, wherein the computer readable storage medium stores a computer program, and the computer program is executable on a processor to implement the vehicle start control method according to the first aspect.

[0031] According to the related art, the present application has the following advantages:

[0032] The vehicle start control method, device, electronic device and vehicle provided by the present application, when receiving a start instruction for the electric vehicle, acquire the start state of the electric vehicle, when the start state is the braking working state, drive the electric vehicle at a first torque output rate, and when the start state switches from the braking working state to the braking idle state, switch the first torque output rate to a second torque output rate, and the second torque output rate is less than the first torque output rate. Different torque output rates can be determined according to different start states, so as to reduce the pushback feeling, and improve the start smoothness and comfort.

[0033] The above description is only a summary of the technical solutions of the present application, in order to enable the person skilled in the art to better understand the technical means of the present application, and to implement the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the present application. Moreover, the same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 is a step flowchart of a vehicle start control method provided by an embodiment of the present application;

[0036] Figure 2 is a step flowchart of a torque output rate switching method provided by an embodiment of the present application;

[0037] Figure 3 is a variation diagram of a torque output rate provided by an embodiment of the present application;

[0038] Figure 4is a structural block diagram of a vehicle starting control device provided by an embodiment of the present application.

[0039] Figure 5 is a structural block diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present application will be described in detail with reference to the drawings. Although exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thoroughly and completely understood, and will fully convey the scope of the application to those skilled in the art.

[0041] The power output of a traditional fuel vehicle is generally gentle and has a small adjustment range due to engine limitations. In contrast, the power torque output rate of an electric vehicle is aggressive and has a large adjustment range due to different driving methods. The output rate is fixed at each throttle opening. When the electric vehicle is limited by, for example, AVH or EPB, the limitation is first removed, and the electric vehicle is then driven at a fixed torque output rate. The sudden torque output rate after the limitation is removed causes a pushback feeling, and the starting smoothness and comfort are low. Therefore, the present application proposes a vehicle starting control method to solve the above technical problems.

[0042] Figure 1 is a step flowchart of a vehicle starting control method provided by an embodiment of the present application, as shown in Figure 1 The method comprises S101-S103.

[0043] S101, when a starting instruction for the electric vehicle is received, the starting state of the electric vehicle is acquired.

[0044] In the embodiment of the present application, the controller of the electric vehicle acquires the starting state of the electric vehicle when a starting instruction for the electric vehicle is received. The starting instruction can be determined according to user input or automatically generated by the system. The starting state includes a brake working state and a brake idle state. The starting state indicates the working condition of the unit for parking in the electric vehicle. When in the brake working state, the electric vehicle is limited for driving. When in the brake idle state, the electric vehicle is unblocked and allows the driver to drive.

[0045] Specifically, the unit for parking includes an AVH (Automatic Vehicle Hold) and an EPB (Electrical Park Brake). The starting state of the electric vehicle is determined by an AVH / EPB signal, which is a digital signal and has two working conditions of 0 and 1. When the AVH / EPB signal is 0, it indicates that the AVH / EPB releases the parking restriction, and at this time, the starting state of the electric vehicle is a brake idle state; when the AVH / EPB signal is 1, it indicates that the AVH / EPB executes the parking restriction, and at this time, the starting state of the electric vehicle is a brake working state.

[0046] S102, when the starting state is the brake working state, driving the electric vehicle at a first torque output rate.

[0047] S103, when the starting state switches from the brake working state to the brake idle state, switching the first torque output rate to a second torque output rate, the first torque output rate being less than the second torque output rate.

[0048] In the embodiments of the present application, the starting state includes the brake working state and the brake idle state. When the starting state is the brake working state, it indicates that the electric vehicle is still restricted by the parking unit, and at this time, the controller drives the electric vehicle at a first torque output rate. When the starting state switches from the brake working state to the brake idle state, it indicates that the electric vehicle is not restricted by the parking unit, and the torque output rate of the electric vehicle switches from the first torque output rate to the second torque output rate, and the controller drives the electric vehicle at the second torque output rate. The first torque output rate is less than the second torque output rate.

[0049] It should be noted that the second torque output rate is generally the target torque output rate required by the electric vehicle when starting, i.e., the starting torque output rate set by the electric vehicle when it is shipped, which can be obtained according to the factory setting of the electric vehicle. The first torque output rate is less than the second torque output rate, and the first torque output rate and the second torque output rate have a coefficient relationship, which is greater than 0 and less than 1. The setting of the coefficient can be obtained by multiple tests before the electric vehicle is shipped, which can reduce the pushback feeling when the electric vehicle is driven at the first torque output rate. For example, the first torque output rate can be 60% or 70% of the second torque output rate, and the specific setting can be determined according to actual needs, which is not limited here.

[0050] The first torque output rate and the second torque output rate constitute a segmented torque output rate, the electric vehicle is first driven at a lower torque output rate, and then driven at a higher torque output rate, so as to reduce the pushback feeling of the electric vehicle and improve the starting smoothness and comfort.

[0051] In summary, when the starting instruction for the electric vehicle is received, the starting state of the electric vehicle is acquired. When the starting state is the braking working state, the electric vehicle is driven at the first torque output rate. When the starting state switches from the braking working state to the braking idle state, the first torque output rate is switched to the second torque output rate. The second torque output rate is less than the first torque output rate. By outputting different torque output powers according to different starting states of the vehicle at the starting time, the torque output power of the vehicle at the starting time can be gently increased, the push-back feeling generated by the vehicle at the starting time is reduced, the vehicle is prevented from shaking, and the starting smoothness and comfort are improved.

[0052] Optionally, Figure 2 is a step flowchart of a torque output rate switching method provided by the embodiment of the application, as shown in the figure, the method comprises S201-S202: Figure 2 S201, the first torque output rate is uniformly accelerated to the second torque output rate.

[0053] S201, the first torque output rate is uniformly accelerated to the second torque output rate.

[0054] S202, in the case of acceleration to the second torque output rate, the electric vehicle is driven at the second torque output rate.

[0055] In the embodiment of the application, the first torque output rate can be uniformly accelerated to the second torque output rate, further ensuring the smoothness and comfort at the starting time. Optionally, when the first torque output rate is uniformly accelerated to the second torque output rate, the acceleration can be according to the preset time length or according to the actual situation of the electric vehicle.

[0056] Figure 3 is a variation diagram of the torque output rate provided by the embodiment of the application. As shown in the figure, when the starting instruction for the electric vehicle is received, the starting state is the braking working state, at this time, the torque output rate is the first torque output rate, the first torque output rate is sixty percent of the second torque output rate. At the same time, when the starting state switches from the braking working state to the braking idle state, the first torque output rate starts to switch and is uniformly accelerated to the second torque output rate within a time length of 200 milliseconds (ms). As can be seen from the figure, the segmented torque output rate ensures the smoothness of the electric vehicle at the starting time and also ensures the starting power of the electric vehicle. Figure 3 Optionally, the step S201 can comprise: controlling the first torque output rate to uniformly accelerate to the second torque output rate within a preset time length. The preset time length is a time length preset for the electric vehicle.

[0057]

[0058] ​In the embodiments of the present application, the preset time length is obtained by multiple tests before the electric vehicle is shipped, and the acceleration that meets the torque output rate can weaken the pushback feeling. For example, the preset time length can be set to 200 milliseconds or 300 milliseconds.

[0059] Optionally, the step S201 can include: determining a growth rate of the first torque output rate to the second torque output rate according to the actual vehicle speed of the electric vehicle; and uniformly accelerating the first torque output rate to the second torque output rate based on the growth rate.

[0060] In the embodiments of the present application, the controller of the electric vehicle pre-stores a correspondence relationship between the vehicle and the growth rate, and after obtaining the actual vehicle speed, the controller queries the correspondence relationship to obtain the growth rate, and then uniformly accelerates the first torque output rate to the second torque output based on the growth rate. It should be noted that the preset time length or the correspondence relationship between the vehicle speed and the growth rate is obtained by multiple tests before the electric vehicle is shipped, and the test can be performed by a physical object or by simulation software.

[0061] In summary, when receiving the starting instruction of the electric vehicle, the embodiments of the present application obtain the starting state of the electric vehicle, drive the electric vehicle at the first torque output rate when the starting state is the braking working state, and uniformly switch the first torque output rate to the second torque output rate after the starting state switches from the braking working state to the braking idle state, to ensure smooth switching and reduce the pushback feeling. By outputting different torque output powers according to different starting states of the vehicle at the starting time, the torque output power of the vehicle at the starting time can be gently increased, the pushback feeling generated by the vehicle at the starting time is reduced, the vehicle is prevented from shaking, and the starting smoothness and comfort are improved.

[0062] Figure 4 is a structural block diagram of a vehicle starting control device 30 provided by the embodiments of the present application, and the device includes:

[0063] The obtaining module 301 is configured to obtain the starting state of the electric vehicle when receiving the starting instruction of the electric vehicle.

[0064] The driving module 302 is configured to drive the electric vehicle at the first torque output rate when the starting state is the braking working state.

[0065] The switching module 303 is configured to switch the first torque output rate to the second torque output rate after the starting state switches from the braking working state to the braking idle state, and the first torque output rate is less than the second torque output rate.

[0066] Optionally, the switching module 303 is further configured to:

[0067] control the first torque output rate to uniformly accelerate to the second torque output rate;

[0068] in the case of accelerating to the second torque output rate, drive the electric vehicle at the second torque output rate.

[0069] Optionally, the switching module 303 is further configured to:

[0070] control the first torque output rate to uniformly accelerate to the second torque output rate in a preset time length, the preset time length being a time length preset by the electric vehicle.

[0071] Optionally, the switching module 303 is further configured to:

[0072] determine a growth rate of the first torque output rate to the second torque output rate according to an actual vehicle speed of the electric vehicle;

[0073] control the first torque output rate to uniformly accelerate to the second torque output rate based on the growth rate.

[0074] In summary, when the starting instruction for the electric vehicle is received, the starting state of the electric vehicle is acquired, when the starting state is the braking working state, the electric vehicle is driven at the first torque output rate, when the starting state is switched from the braking working state to the braking idle state, the first torque output rate is uniformly switched to the second torque output rate, to ensure smooth switching and reduce the pushback feeling. At the same time, the electric vehicle is driven at the first torque output rate at the starting time, to avoid slow vehicle starting and ensure starting acceleration.

[0075] For the above-mentioned embodiments of the server, since they are basically similar to the method embodiments, the description is relatively simple, and the related parts are referred to the part of the method embodiments.

[0076] The embodiment of the application further provides a vehicle, which can include the vehicle starting control method described above.

[0077] The embodiment of the application further provides an electronic device, such as Figure 4 As shown in the figure, it includes a processor 401, a communication interface 402, a memory 403 and a communication bus 404, wherein the processor 401, the communication interface 402 and the memory 403 complete mutual communication through the communication bus 404,

[0078] The memory 403 is used to store computer programs;

[0079] The processor 401 is used to execute the programs stored in the memory 403, to realize the steps in any of the vehicle starting control methods described above.

[0080] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0081] The communication interface is used for communication between the terminal and other devices.

[0082] The memory can include a Random Access Memory (RAM) and can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the processor.

[0083] The processor mentioned above can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0084] In another embodiment provided in the present application, a computer readable storage medium is also provided, and the computer readable storage medium stores instructions, when the instructions run on a computer, the computer executes the vehicle starting control method in any of the above embodiments.

[0085] In another embodiment provided in the present application, a computer program product containing instructions is also provided, when the instructions run on a computer, the computer executes the vehicle starting control method in any of the above embodiments.

[0086] In the embodiments described above, all or some of the steps can be implemented by hardware, software, firmware or any combination thereof. When implemented by software, all or some of the steps can be implemented in the form of one or more computer programs or program elements. The computer programs reside (at least temporarily) in a memory of a computer during execution. The memory can be a RAM memory, a flash memory, a ROM memory, an EPROM memory, or any other suitable memory. The memory can be integral to or separate from the computer. The computer programs can be written in any suitable programming language, such as C, C++, Java, Visual Basic, etc. The computer programs can be written in assembly or machine language, if desired. The computer programs can be distributed over network coupled file servers, or can be distributed by any other suitable means.

[0087] It is to be noted that the terms such as first and second, etc., are used herein merely to differentiate one entity or action from another, and do not necessarily require or imply any such actual relationship or order between such entities or actions. Also, the terms "comprising", "containing", or any other similar term are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not necessarily contain only those elements, but can contain other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0088] Each of the embodiments in the present specification is described in a related manner, and the same or similar parts among the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the method embodiments.

[0089] The above merely provides the preferred embodiments of the application, and not intended to limit the protection scope of the application. Any modification, equivalent replacement, improvement, and the like made within the principle and technical scope of the application shall fall into the protection scope of the application.

Claims

1. A vehicle starting control method, characterized in that, The method includes: Upon receiving a start command for an electric vehicle, the starting status of the electric vehicle is obtained; When the starting state is the braking working state, the electric vehicle is driven at the first torque output rate; When the starting state switches from the braking working state to the braking idle state, switching the first torque output rate to the second torque output rate includes: controlling the first torque output rate to accelerate uniformly to the second torque output rate; the control of the first torque output rate to accelerate uniformly to the second torque output rate includes: pre-storing the correspondence between the vehicle and the growth rate, determining the growth rate from the first torque output rate to the second torque output rate based on the correspondence according to the actual speed of the electric vehicle; and uniformly accelerating the first torque output rate to the second torque output rate based on the growth rate; the first torque output rate is less than the second torque output rate.

2. The method according to claim 1, characterized in that, Switching the first torque output rate to the second torque output rate includes: When accelerating to the second torque output rate, the electric vehicle is driven at the second torque output rate.

3. The method according to claim 1, characterized in that, The control of the first torque output rate to accelerate uniformly to the second torque output rate includes: The first torque output rate is controlled to accelerate at a constant speed to the second torque output rate over a preset duration.

4. A vehicle starting control device, characterized in that, The device includes: The acquisition module is used to acquire the starting status of the electric vehicle when a start command for the electric vehicle is received. The drive module is used to drive the electric vehicle at a first torque output rate when the starting state is a braking working state; A switching module is used to switch the first torque output rate to a second torque output rate when the starting state switches from the braking working state to the braking idle state. This includes: controlling the first torque output rate to accelerate uniformly to the second torque output rate; the control of the first torque output rate to accelerate uniformly to the second torque output rate includes: pre-storing a correspondence between the vehicle and the growth rate, determining the growth rate from the first torque output rate to the second torque output rate based on the actual speed of the electric vehicle and the correspondence; and uniformly accelerating the first torque output rate to the second torque output rate based on the growth rate; wherein the first torque output rate is less than the second torque output rate.

5. The apparatus according to claim 4, characterized in that, The switching module is also used for: When accelerating to the second torque output rate, the electric vehicle is driven at the second torque output rate.

6. The apparatus according to claim 4, characterized in that, The switching module is also used for: The first torque output rate is controlled to accelerate at a constant speed to the second torque output rate over a preset duration.

7. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the vehicle start control method according to any one of claims 1 to 3.

8. A vehicle, characterized in that, Includes the vehicle start-up control method according to any one of claims 1 to 3.

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