A vehicle throttle characteristic design method, device, equipment and storage medium

Abstract

A vehicle throttle characteristic design method, device, equipment and storage medium, relate to the automobile driving technical field, including, according to the throttle pedal signal and engine speed signal, actual throttle pedal opening and actual engine speed are obtained respectively;According to the actual throttle pedal opening and pedal coefficient, get the conversion throttle pedal opening;According to the common engine speed and the actual engine speed, the relationship between the initial value of the throttle pedal and the conversion throttle pedal opening is determined, and the reference amount of the actual engine speed deviating from the common engine speed;The torque initial value is determined according to the throttle pedal initial value and the reference amount, and based on the torque initial value and the torque coefficient, the maximum torque percentage that can reflect the vehicle driving characteristic under each actual throttle pedal opening and actual engine speed is calculated, and the vehicle throttle characteristic design is carried out based on the maximum torque percentage. The present application can realize the vehicle throttle characteristic design by using only the throttle and speed signal.

Description

Technical Field

[0001] This application relates to the field of automotive driving technology, specifically to a method, apparatus, device, and storage medium for designing vehicle throttle characteristics. Background Technology

[0002] The characteristics of a car's throttle are the engine torque output characteristics at a certain engine speed and throttle opening at a certain vehicle speed. In other words, at a certain vehicle speed, the corresponding curves of engine speed and torque at different throttle openings are shown.

[0003] Currently, if there is no accurate external acceleration sensor signal input for the vehicle, subjective evaluation is usually used to debug the vehicle. However, when using external acceleration sensor signals, the system is too dependent on acceleration parameters, which is not conducive to platform-based design. Summary of the Invention

[0004] This application provides a method, apparatus, device, and storage medium for designing vehicle throttle characteristics, which can achieve vehicle throttle characteristic design using only throttle and speed signals.

[0005] In a first aspect, embodiments of this application provide a vehicle throttle characteristic design method, the vehicle throttle characteristic design method comprising:

[0006] The actual accelerator pedal opening and the actual engine speed are obtained based on the accelerator pedal signal and the engine speed signal, respectively.

[0007] Based on the actual accelerator pedal opening and pedal coefficient, a converted accelerator pedal opening that reflects the vehicle's driving characteristics is obtained.

[0008] Based on the commonly used engine speed and the actual engine speed, determine the relationship between the initial value of the accelerator pedal and the converted accelerator pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed;

[0009] The initial torque value is determined based on the initial value of the accelerator pedal and the reference value. Based on the initial torque value and the torque coefficient, the maximum torque percentage that can reflect the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed is calculated. The vehicle's throttle characteristics are designed based on the maximum torque percentage.

[0010] In conjunction with the first aspect, in one embodiment, obtaining the converted accelerator pedal opening that reflects the vehicle's driving characteristics based on the actual accelerator pedal opening and pedal coefficient includes:

[0011] According to the formula: Calculate the converted accelerator pedal opening Pa, where α is the actual accelerator pedal opening and Pdchar is the pedal coefficient.

[0012] In conjunction with the first aspect, in one embodiment, determining the relationship between the initial pedal value and the converted accelerator pedal opening based on the commonly used engine speed and the actual engine speed includes:

[0013] According to the formula: Determine the relationship between the initial pedal value and the converted accelerator pedal opening, where MeanPedal is the percentage of the commonly used pedal, MeanPedalPerc is the commonly used pedal opening, EngineSpeed ​​is the actual engine speed, and MeanSpeed ​​is the commonly used engine speed.

[0014] In conjunction with the first aspect, in one embodiment, determining the reference amount by which the actual engine speed deviates from the common engine speed based on the commonly used engine speed and the actual engine speed includes:

[0015] According to the formula: Gain P = (MeanSpeed ​​- EngineSpeed) × PGain, calculate the gain P that the actual engine speed deviates from the commonly used engine speed, where Pgain is the proportional gain.

[0016] In conjunction with the first aspect, in one embodiment, determining the initial torque value based on the initial pedal value and a reference value, and calculating the maximum percentage of torque reflecting the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and a torque coefficient, includes:

[0017] Calculate the initial torque value using the formula: Initial torque value = Initial pedal value + Gain P.

[0018] According to the formula: Maximum torque percentage = Initial torque value TorqueChar ×100, calculate the maximum torque percentage, where TorqueChar is the torque coefficient.

[0019] In conjunction with the first aspect, in one implementation, it further includes:

[0020] Set the minimum engine speed at which the slope takes effect, the maximum slope limit for low-speed indicated torque, and the maximum slope limit for high-speed indicated torque;

[0021] When the actual engine speed is less than the minimum engine speed at which the slope takes effect, the maximum torque percentage changes according to the maximum slope limit of the low speed indicated torque.

[0022] When the actual engine speed is greater than or equal to the minimum engine speed at which the slope takes effect, and the indicated torque slope is greater than the maximum slope limit of the high-speed indicated torque, the maximum torque percentage changes according to the maximum slope limit of the high-speed indicated torque.

[0023] In conjunction with the first aspect, in one implementation, when the actual engine speed is less than the idle speed value, the idle speed value is taken as the actual engine speed.

[0024] Secondly, embodiments of this application provide a vehicle throttle characteristic design device, the vehicle throttle characteristic design device comprising:

[0025] The data acquisition module obtains the actual accelerator pedal opening and the actual engine speed based on the accelerator pedal signal and the engine speed signal, respectively.

[0026] The calculation module calculates the equivalent accelerator pedal opening based on the actual accelerator pedal opening and pedal coefficient, which reflects the vehicle's driving characteristics.

[0027] The calculation module also determines the relationship between the initial value of the pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed, based on the commonly used engine speed and the actual engine speed.

[0028] The calculation module also determines the initial torque value based on the initial pedal value and the reference value, and calculates the maximum torque percentage that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, and designs the vehicle's throttle characteristics based on the maximum torque percentage.

[0029] Thirdly, embodiments of this application provide a vehicle throttle characteristic design device, the vehicle throttle characteristic design device including a processor, a memory, and a vehicle throttle characteristic design program stored in the memory and executable by the processor, wherein when the vehicle throttle characteristic design program is executed by the processor, it implements the steps of any of the vehicle throttle characteristic design methods described above.

[0030] Fourthly, embodiments of this application provide a computer-readable storage medium storing a vehicle throttle characteristic design program, wherein when the vehicle throttle characteristic design program is executed by a processor, it implements the steps of the vehicle throttle characteristic design method as described above.

[0031] The beneficial effects of the technical solutions provided in this application include at least the following:

[0032] The vehicle throttle characteristic design method in this application obtains the actual throttle pedal opening and the actual engine speed based on the throttle pedal signal and the engine speed signal, respectively; obtains the converted throttle pedal opening that reflects the vehicle's driving characteristics based on the actual throttle pedal opening and the pedal coefficient; determines the relationship between the initial value of the throttle pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the common engine speed, based on the commonly used engine speed and the actual engine speed; determines the initial value of torque based on the initial value of the throttle pedal and the reference amount; and calculates the maximum percentage of torque that reflects the vehicle's driving characteristics at each actual throttle pedal opening and actual engine speed based on the initial value of torque and the torque coefficient, and designs the vehicle throttle characteristics based on the maximum percentage of torque.

[0033] Therefore, vehicle throttle characteristics can be designed using only accelerator pedal and engine speed signals, eliminating the need for acceleration sensor hardware and ensuring high system reliability. Furthermore, it reduces the system's dependence on acceleration parameters, making it more suitable for platform-based design. Attached Figure Description

[0034] Figure 1 This is a flowchart illustrating an embodiment of the vehicle throttle characteristic design method of this application;

[0035] Figure 2 This is a schematic diagram showing the percentage of maximum torque that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed.

[0036] Figure 3 This is a structural block diagram of the vehicle throttle characteristic design device of this application;

[0037] Figure 4 This is a schematic diagram of the hardware structure of the vehicle throttle characteristic design device involved in the embodiments of this application. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0039] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0040] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0041] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0042] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] In a first aspect, embodiments of this application provide a method for designing vehicle throttle characteristics.

[0045] In one embodiment, reference is made to Figure 1 , Figure 1 This is a schematic flowchart illustrating an embodiment of the vehicle throttle characteristic design method of this application. Figure 1As shown, the vehicle throttle characteristic design method includes:

[0046] S1. Based on the accelerator pedal signal and the engine speed signal, obtain the actual accelerator pedal opening and the actual engine speed, respectively.

[0047] It is worth noting that this embodiment does not require acceleration sensor hardware; it only needs to collect accelerator pedal signals and engine speed signals. After collecting the signals, the actual accelerator pedal opening α and the actual engine speed EngineSpeed ​​can be obtained.

[0048] S2. Based on the actual accelerator pedal opening and pedal coefficient, obtain the converted accelerator pedal opening that reflects the vehicle's driving characteristics.

[0049] After obtaining the actual accelerator pedal opening α, we can use the formula: Calculate the converted accelerator pedal opening Pa, where α is the actual accelerator pedal opening and Pdchar is the pedal coefficient.

[0050] Pdchar can be adjusted according to the actual driving quality definition of the vehicle. Specifically, if Pdchar is between 0 and 1, the ratio of the calculated accelerator pedal opening to the actual accelerator pedal opening shows a gradual increase, with a relatively smooth characteristic, resembling a logarithmic curve. If Pdchar is 1, the ratio of the calculated accelerator pedal opening to the actual accelerator pedal opening shows a direct linear relationship. If Pdchar is greater than 1, the calculated accelerator pedal opening shows a steep increase, resembling an exponential curve.

[0051] S3. Based on the commonly used engine speed and the actual engine speed, determine the relationship between the initial value of the accelerator pedal and the converted accelerator pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed.

[0052] Specifically, firstly according to the formula: The relationship between the initial pedal value and the calculated accelerator pedal opening is determined. MeanPedal is the percentage of the commonly used pedal, which can be obtained from vehicle market user data statistics. MeanPedalPerc is the commonly used pedal opening, which can be obtained from vehicle driving behavior analysis. EngineSpeed ​​is the actual engine speed, and MeanSpeed ​​is the commonly used engine speed, which can be obtained from vehicle market user data statistics.

[0053] It is worth noting that when the actual engine speed is less than the idle speed, the idle speed is taken as the actual engine speed.

[0054] Then, according to the formula: Gain P = (MeanSpeed ​​- EngineSpeed) × PGain, calculate the gain P that the actual engine speed deviates from the commonly used engine speed, where Pgain is the proportional gain.

[0055] When there is a deviation between the actual engine speed and the commonly used engine speed, the greater the gain, the stronger the compensation for the deviation, which is reflected in the throttle characteristics as a larger rate of torque change when deviating from the commonly used engine speed.

[0056] S4. Determine the initial torque value based on the initial value of the accelerator pedal and the reference value. Based on the initial torque value and the torque coefficient, calculate the maximum torque percentage that can reflect the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed. Design the vehicle's throttle characteristics based on the maximum torque percentage.

[0057] Specifically, the initial torque value is first calculated using the formula: Initial Torque Value = Initial Pedal Value + Gain P. It's worth noting that, based on the formula for the initial pedal value, it can be considered a dimensionless quantity. Simultaneously, the proportional gain Pgain is set to be multiplied by the engine speed to eliminate the dimension of the engine speed, thus also becoming a dimensionless quantity. Therefore, an additive calculation can be performed here, and the resulting initial torque value is also dimensionless.

[0058] Then, according to the formula: Maximum torque percentage = Initial torque value TorqueChar ×100, calculate the maximum torque percentage, where TorqueChar is the torque coefficient.

[0059] TorqueChar is similar to PdChar mentioned above and can also be adjusted according to the actual driving quality of the vehicle. Specifically, if TorqueChar is between 0 and 1, the maximum torque percentage increases gradually, with a smooth characteristic, and the overall change resembles a logarithmic curve. If TorqueChar is 1, the maximum torque percentage has a directly proportional linear relationship with the actual accelerator pedal opening. If TorqueChar is greater than 1, the maximum torque percentage exhibits a steep increase, and the overall change resembles an exponential curve.

[0060] It is worth noting that some embodiments also include:

[0061] Set the minimum engine speed at which the slope takes effect, the maximum slope limit for low-speed indicated torque, and the maximum slope limit for high-speed indicated torque;

[0062] When the actual engine speed is less than the minimum engine speed at which the slope takes effect, the maximum torque percentage changes according to the minimum slope limit of the low speed indicated torque.

[0063] When the actual engine speed is greater than or equal to the minimum engine speed at which the slope takes effect, and the indicated torque slope is greater than the maximum slope limit of the high-speed indicated torque, the maximum torque percentage changes according to the maximum slope limit of the high-speed indicated torque.

[0064] In other words, the above steps are a supplement to determining the maximum torque percentage as a whole. They can be understood as a piecewise function. Only when the relevant conditions are met will the calculation be performed according to the formula for the maximum torque percentage given above. When the conditions are not met, the calculation needs to be performed in the supplementary way mentioned above.

[0065] The following is a specific example to illustrate this point and aid understanding:

[0066] First, define a certain vehicle throttle characteristic:

[0067] Low idle speed = 600 rpm;

[0068] pedal coefficient pedalchar = 4;

[0069] MeanPedalPerc = 40% (often used pedal percentage)

[0070] The commonly used pedal opening is MeanPedal = 30.

[0071] The commonly used engine speed MeanSpeed ​​= 1250;

[0072] Pgain = 0;

[0073] Torque coefficient TorqueChar = 0.4;

[0074] The minimum engine speed at which the slope takes effect is 1000.

[0075] The maximum slope limit for low-speed indicated torque (maximum permissible slope) = 0.9;

[0076] The maximum slope limit for high-speed indicated torque (maximum permissible slope) = 0.1.

[0077] Then, based on the method for determining the maximum torque percentage described above, calculations are performed to obtain the maximum torque percentage at each actual accelerator pedal opening and actual engine speed. For details, please refer to [link / reference needed]. Figure 2 As shown.

[0078] In summary, the vehicle throttle characteristic design method in this application obtains the actual throttle pedal opening and the actual engine speed based on the throttle pedal signal and the engine speed signal, respectively; obtains the converted throttle pedal opening that reflects the vehicle's driving characteristics based on the actual throttle pedal opening and the pedal coefficient; determines the relationship between the initial value of the throttle pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the common engine speed, based on the commonly used engine speed and the actual engine speed; determines the initial torque value based on the initial throttle pedal value and the reference amount; and calculates the maximum torque percentage that reflects the vehicle's driving characteristics at each actual throttle pedal opening and actual engine speed based on the initial torque value and the torque coefficient, and designs the vehicle throttle characteristics based on the maximum torque percentage.

[0079] Therefore, vehicle throttle characteristics can be designed using only accelerator pedal and engine speed signals, eliminating the need for acceleration sensor hardware and ensuring high system reliability. Furthermore, it reduces the system's dependence on acceleration parameters, making it more suitable for platform-based design.

[0080] Secondly, embodiments of this application also provide a vehicle throttle characteristic design device.

[0081] In one embodiment, reference is made to Figure 3 , Figure 3 This is a structural block diagram of an embodiment of the vehicle throttle characteristic design device of this application. Figure 3 As shown, the vehicle throttle characteristic design device includes: a data acquisition module and a calculation module.

[0082] The acquisition module obtains the actual accelerator pedal opening and the actual engine speed based on the accelerator pedal signal and the engine speed signal, respectively.

[0083] The calculation module calculates the equivalent accelerator pedal opening based on the actual accelerator pedal opening and pedal coefficient, which reflects the vehicle's driving characteristics.

[0084] The calculation module also determines the relationship between the initial value of the pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed, based on the commonly used engine speed and the actual engine speed.

[0085] The calculation module also determines the initial torque value based on the initial pedal value and the reference value, and calculates the maximum torque percentage that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, and designs the vehicle's throttle characteristics based on the maximum torque percentage.

[0086] Furthermore, in one embodiment, the calculation module obtains a converted accelerator pedal opening that reflects the vehicle's driving characteristics based on the actual accelerator pedal opening and the pedal coefficient, including:

[0087] According to the formula: Calculate the converted accelerator pedal opening Pa, where α is the actual accelerator pedal opening and Pdchar is the pedal coefficient.

[0088] Further, in one embodiment, the calculation module determines the relationship between the initial pedal value and the converted accelerator pedal opening based on the commonly used engine speed and the actual engine speed, including:

[0089] According to the formula: Determine the relationship between the initial pedal value and the converted accelerator pedal opening, where MeanPedal is the percentage of the commonly used pedal, MeanPedalPerc is the commonly used pedal opening, EngineSpeed ​​is the actual engine speed, and MeanSpeed ​​is the commonly used engine speed.

[0090] Furthermore, in one embodiment, the calculation module determines a reference amount by which the actual engine speed deviates from the common engine speed based on the commonly used engine speed and the actual engine speed, including:

[0091] According to the formula: Gain P = (MeanSpeed ​​- EngineSpeed) × PGain, calculate the gain P that the actual engine speed deviates from the commonly used engine speed, where Pgain is the proportional gain.

[0092] Further, in one embodiment, the calculation module determines the initial torque value based on the initial pedal value and a reference value, and calculates the maximum percentage of torque that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, including:

[0093] Calculate the initial torque value using the formula: Initial torque value = Initial pedal value + Gain P.

[0094] According to the formula: Maximum torque percentage = Initial torque value TorqueChar ×100, calculate the maximum torque percentage, where TorqueChar is the torque coefficient.

[0095] Furthermore, in one embodiment, the computing module is also used for:

[0096] Set the minimum engine speed at which the slope takes effect, the maximum slope limit for low-speed indicated torque, and the maximum slope limit for high-speed indicated torque, so that:

[0097] When the actual engine speed is less than the minimum engine speed at which the slope takes effect, the maximum torque percentage changes according to the minimum slope limit of the low speed indicated torque.

[0098] When the actual engine speed is greater than or equal to the minimum engine speed at which the slope takes effect, and the indicated torque slope is greater than the maximum slope limit of the high-speed indicated torque, the maximum torque percentage changes according to the maximum slope limit of the high-speed indicated torque.

[0099] Furthermore, in one embodiment, the computing module is also used for:

[0100] When the actual engine speed is less than the idle speed, the idle speed is taken as the actual engine speed.

[0101] The functions of each component in the above-mentioned vehicle throttle characteristic design device correspond to the steps in the above-mentioned vehicle throttle characteristic design method embodiment, and their functions and implementation processes will not be described in detail here.

[0102] In summary, the vehicle throttle characteristic design device of this application comprises: an acquisition module that obtains the actual throttle pedal opening and the actual engine speed based on the throttle pedal signal and the engine speed signal, respectively; a calculation module that obtains a converted throttle pedal opening that reflects the vehicle's driving characteristics based on the actual throttle pedal opening and the pedal coefficient; a determination of the relationship between the initial value of the throttle pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the common engine speed, based on the commonly used engine speed and the actual engine speed; a determination of the initial torque value based on the initial throttle pedal value and the reference amount; and, based on the initial torque value and the torque coefficient, calculation of the maximum torque percentage that reflects the vehicle's driving characteristics at each actual throttle pedal opening and actual engine speed, and design of the vehicle throttle characteristics based on the maximum torque percentage.

[0103] Therefore, vehicle throttle characteristics can be designed using only accelerator pedal and engine speed signals, eliminating the need for acceleration sensor hardware and ensuring high system reliability. Furthermore, it reduces the system's dependence on acceleration parameters, making it more suitable for platform-based design.

[0104] Thirdly, embodiments of this application provide a vehicle throttle characteristic design device, which can be a personal computer (PC), laptop computer, server, or other device with data processing capabilities.

[0105] Reference Figure 4 , Figure 4 This is a schematic diagram of the hardware structure of the vehicle throttle characteristic design device involved in the embodiments of this application. In the embodiments of this application, the vehicle throttle characteristic design device may include a processor, a memory, a communication interface, and a communication bus.

[0106] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0107] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting components within the vehicle throttle characteristic design equipment, as well as interfaces used for interconnecting the vehicle throttle characteristic design equipment with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0108] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0109] The processor can be a general-purpose processor, which can call the vehicle throttle characteristic design program stored in memory and execute the vehicle throttle characteristic design method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the vehicle throttle characteristic design program is called can be referred to in the various embodiments of the vehicle throttle characteristic design method of this application, and will not be repeated here.

[0110] Those skilled in the art will understand that Figure 4 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0111] Fourthly, embodiments of this application also provide a computer-readable storage medium.

[0112] The present application provides a computer-readable storage medium storing a vehicle throttle characteristic design program, wherein when the vehicle throttle characteristic design program is executed by a processor, it implements the steps of the vehicle throttle characteristic design method described above.

[0113] The method implemented when the vehicle throttle characteristic design program is executed can be referred to in various embodiments of the vehicle throttle characteristic design method of this application, and will not be repeated here.

[0114] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0115] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0116] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for designing vehicle throttle characteristics, characterized in that, The vehicle throttle characteristic design method includes: The actual accelerator pedal opening and the actual engine speed are obtained based on the accelerator pedal signal and the engine speed signal, respectively. Based on the actual accelerator pedal opening and pedal coefficient, a converted accelerator pedal opening that reflects the vehicle's driving characteristics is obtained. Based on the commonly used engine speed and the actual engine speed, determine the relationship between the initial value of the pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed; The initial torque value is determined based on the initial value of the pedal and the reference value. Based on the initial torque value and the torque coefficient, the maximum torque percentage that can reflect the vehicle driving characteristics at each actual accelerator pedal opening and actual engine speed is calculated. The vehicle throttle characteristics are designed based on the maximum torque percentage. The step of obtaining the converted accelerator pedal opening, which reflects the vehicle's driving characteristics, based on the actual accelerator pedal opening and pedal coefficient includes: According to the formula: Calculate the converted accelerator pedal opening Pa, where α is the actual accelerator pedal opening and Pdchar is the pedal coefficient; The process of determining the relationship between the initial pedal value and the converted accelerator pedal opening based on commonly used engine speeds and actual engine speeds includes: According to the formula: Determine the relationship between the initial value of the pedal and the converted throttle pedal opening, where MeanPedal is the percentage of the commonly used pedal, MeanPedalPerc is the commonly used pedal opening, EngineSpeed ​​is the actual engine speed, and MeanSpeed ​​is the commonly used engine speed. The step of determining the reference amount by which the actual engine speed deviates from the commonly used engine speed based on the commonly used engine speed and the actual engine speed includes: According to the formula: Calculate the gain P that the actual engine speed deviates from the commonly used engine speed, where Pgain is the proportional gain. The process of determining the initial torque value based on the initial pedal value and reference value, and calculating the maximum percentage of torque that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, includes: According to the formula: Calculate the initial value of the torque; According to the formula: Calculate the maximum torque percentage, where TorqueChar is the torque coefficient.

2. The vehicle throttle characteristic design method as described in claim 1, characterized in that, Also includes: Set the minimum engine speed at which the slope takes effect, the maximum slope limit for low-speed indicated torque, and the maximum slope limit for high-speed indicated torque; When the actual engine speed is less than the minimum engine speed at which the slope takes effect, the maximum torque percentage changes according to the minimum slope limit of the low speed indicated torque. When the actual engine speed is greater than or equal to the minimum engine speed at which the slope takes effect, and the indicated torque slope is greater than the maximum slope limit of the high-speed indicated torque, the maximum torque percentage changes according to the maximum slope limit of the high-speed indicated torque.

3. The vehicle throttle characteristic design method as described in claim 1, characterized in that: When the actual engine speed is less than the idle speed, the idle speed is taken as the actual engine speed.

4. A vehicle throttle characteristic design device, characterized in that, The vehicle throttle characteristic design device includes: The data acquisition module obtains the actual accelerator pedal opening and the actual engine speed based on the accelerator pedal signal and the engine speed signal, respectively. The calculation module calculates the equivalent accelerator pedal opening based on the actual accelerator pedal opening and pedal coefficient, which reflects the vehicle's driving characteristics. The calculation module also determines the relationship between the initial value of the pedal and the converted throttle pedal opening, as well as the reference amount by which the actual engine speed deviates from the commonly used engine speed, based on the commonly used engine speed and the actual engine speed. The calculation module also determines the initial torque value based on the initial pedal value and the reference value, and calculates the maximum torque percentage that can reflect the vehicle driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, and designs the vehicle throttle characteristics based on the maximum torque percentage. The step of obtaining the converted accelerator pedal opening, which reflects the vehicle's driving characteristics, based on the actual accelerator pedal opening and pedal coefficient includes: According to the formula: Calculate the converted accelerator pedal opening Pa, where α is the actual accelerator pedal opening and Pdchar is the pedal coefficient; The process of determining the relationship between the initial pedal value and the converted accelerator pedal opening based on commonly used engine speeds and actual engine speeds includes: According to the formula: Determine the relationship between the initial value of the pedal and the converted throttle pedal opening, where MeanPedal is the percentage of the commonly used pedal, MeanPedalPerc is the commonly used pedal opening, EngineSpeed ​​is the actual engine speed, and MeanSpeed ​​is the commonly used engine speed. The step of determining the reference amount by which the actual engine speed deviates from the commonly used engine speed based on the commonly used engine speed and the actual engine speed includes: According to the formula: Calculate the gain P that the actual engine speed deviates from the commonly used engine speed, where Pgain is the proportional gain. The process of determining the initial torque value based on the initial pedal value and reference value, and calculating the maximum percentage of torque that reflects the vehicle's driving characteristics at each actual accelerator pedal opening and actual engine speed based on the initial torque value and torque coefficient, includes: According to the formula: Calculate the initial value of the torque; According to the formula: Calculate the maximum torque percentage, where TorqueChar is the torque coefficient.

5. A vehicle throttle characteristic design device, characterized in that, The vehicle throttle characteristic design device includes a processor, a memory, and a vehicle throttle characteristic design program stored in the memory and executable by the processor, wherein when the vehicle throttle characteristic design program is executed by the processor, it implements the steps of the vehicle throttle characteristic design method as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a vehicle throttle characteristic design program, wherein when the vehicle throttle characteristic design program is executed by a processor, it implements the steps of the vehicle throttle characteristic design method as described in any one of claims 1 to 3.

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