Objective evaluation method and system for linearity of vehicle re-acceleration dynamic performance

Abstract

The present invention relates to the field of vehicle evaluation technology, and specifically to a method and system for objectively evaluating the linearity of vehicle re-acceleration dynamic performance. The method comprises obtaining the acceleration gains corresponding to different accelerator pedal stroke increments when the vehicle is traveling at a constant speed; calculating the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments, and the better the linearity, the better the linearity of the re-acceleration dynamic performance corresponding to the current speed of the vehicle. The method can evaluate the linearity of vehicle re-acceleration dynamic performance, and can be used to evaluate the linearity of dynamic performance of two or more vehicles intuitively and quantitatively, in particular, when used to compare the linearity of dynamic performance of two or more vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle evaluation, and in particular to a method and system for objectively evaluating the linearity of vehicle re-acceleration dynamic performance. Background Art

[0002] The dynamics of a vehicle is an important indicator for evaluating its performance. On the one hand, dynamics plays a decisive role in the transportation efficiency of a vehicle, so it is one of the most basic and important performances of a vehicle. On the other hand, vehicle dynamics is crucial to improving customer experience and enhancing the competitiveness of vehicle models. The customer experience is the dynamic performance of the vehicle when the accelerator pedal is pressed down for part of the stroke, which is closer to the actual use conditions, in daily driving. Therefore, the objective evaluation of partial load dynamic performance, which is closer to daily driving, has important guiding significance for the early research and development process of automobile models.

[0003] At present, the re-acceleration dynamic performance of a vehicle is usually evaluated by the ultimate dynamic performance that the vehicle can achieve when the accelerator pedal is opened to 100%. The time interval value of the vehicle accelerating through a certain speed range is usually used for evaluation. Commonly used evaluation speed ranges include 40-80km / h, 60-100km / h, 80-120km / h, etc. This evaluation method directly uses time data as the evaluation standard, that is, the smaller the time value, the better the vehicle dynamic performance.

[0004] In actual driving, drivers rarely press the accelerator pedal to 100% and usually do not know how much the accelerator pedal is opened. The above evaluation method uses objective data when the accelerator pedal is opened to 100%, which well reflects the maximum power performance that the vehicle can provide, but cannot evaluate the power performance of the vehicle when the accelerator pedal is partially pressed during actual driving. Since the accelerator pedal is rarely pressed to 100% in daily driving conditions, it cannot well reflect the actual daily driving experience.

[0005] In addition, when driving, the accelerator pedal input directly reflects the driver's expectation of the vehicle's power. The accelerator pedal travel is an absolute quantity that can be directly controlled and felt by the driver, while the accelerator pedal opening is a relative quantity related to the total accelerator pedal travel. The driver needs to compare it with the total accelerator pedal travel, which puts higher requirements on non-professional driving reviewers, increases the difficulty of evaluation, and there is a problem that the evaluation benchmark is not uniform due to the influence of the total pedal travel.

[0006] At present, an objective evaluation method for evaluating the partial load re-acceleration dynamic performance of vehicles using acceleration gain has gradually been formed in the industry. Usually, the acceleration gain corresponding to a certain amount of accelerator pedal stroke s at any uniform speed is used to quantitatively evaluate the partial load re-acceleration dynamic performance of vehicles. In particular, it can provide an intuitive and quantitative evaluation when used to compare the dynamic performance of two or more vehicles.

[0007] The above evaluation method uses the acceleration gain corresponding to a certain amount of accelerator pedal stroke at any uniform driving speed to evaluate the vehicle's re-acceleration dynamic performance, thereby achieving an objective quantitative evaluation. However, it only describes the acceleration gain corresponding to a selected certain amount of accelerator pedal stroke increment s, and does not point out the relationship between the acceleration gains corresponding to different accelerator pedal stroke increments s, nor does it point out how to evaluate the acceleration gains corresponding to different accelerator pedal stroke increments s. Therefore, it cannot well evaluate the linearity of the re-acceleration dynamics.

[0008] In addition, the accelerator pedal increment pressed by the driver directly reflects the driver's expectation of the vehicle's power. In actual driving, the accelerator pedal increment s pressed by the driver each time will be different. The driver hopes that the change in the re-acceleration capacity corresponding to each different accelerator pedal increment s1, s2, s3... will show a certain regularity and can be easily mastered. It is best to have a certain linear change regularity with the accelerator pedal increment.

[0009] Therefore, based on the above defects in the art, there is an urgent need for a method that can evaluate the linearity of re-acceleration dynamics.

[0010] The present invention takes the driving habits and perception habits of customers during actual driving as the starting point, and proposes to evaluate the linearity of the vehicle's partial load re-acceleration dynamics based on the linear change relationship between the acceleration gains corresponding to a set of actual accelerator pedal travel increments s1, s2, s3... depressed by the driver. Summary of the invention

[0011] The purpose of the present invention is to address the defects of the prior art and provide an objective evaluation method and system for the linearity of vehicle re-acceleration dynamic performance, which can evaluate the linearity of vehicle partial load re-acceleration dynamic performance, especially when used for comparing the dynamic linearity of two or more vehicles, and can perform intuitive and quantitative evaluation.

[0012] A method for objectively evaluating the linearity of vehicle re-acceleration dynamic performance of the present invention comprises:

[0013] Obtain the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed;

[0014] The linearity between the acceleration gains corresponding to different accelerator pedal travel increments is calculated. When the linearity is better, it is determined that the linearity of the re-acceleration dynamic performance corresponding to the vehicle at the current vehicle speed is better.

[0015] More preferably, the different accelerator pedal stroke increments show an increasing trend in an arithmetic progression.

[0016] Preferably, the method of obtaining the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed includes:

[0017] The vehicle is driven at a constant speed, and an accelerator pedal stroke increment is selected in sequence in an incremental manner under the pedal stroke corresponding to the current vehicle speed to perform an accelerator pedal pressing action until the vehicle reaches a maximum acceleration, and the maximum acceleration corresponding to the current accelerator pedal stroke increment is recorded to obtain a maximum acceleration data group;

[0018] The acceleration gain under each accelerator pedal stroke increment is calculated in sequence according to the maximum acceleration data set, and the acceleration gain data set A=[k1, k2, k i ……k n ], i takes any value from 1 to n, and n is the number of acceleration gain data in the data group. The above method is used to select an accelerator pedal stroke increment in an incremental manner to perform the accelerator pedal pressing action, which is conducive to accurately obtaining the linear change relationship between the acceleration gains, thereby realizing the objective evaluation of the linearity of the re-acceleration dynamic performance.

[0019] More preferably, the acceleration gain under the accelerator pedal stroke increment is the ratio of the maximum acceleration to the corresponding accelerator pedal stroke increment.

[0020] Preferably, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is calculated including:

[0021] Calculate k2-k1, k3-k2...k in acceleration gain data group A in sequence n -k n-1 The value of is obtained to obtain a set of difference arrays formed by the difference values. If the closeness between the differences in the difference array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better.

[0022] Preferably, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is calculated including:

[0023] Calculate k2 / k1, k3 / k2, ... k in acceleration gain data group A in sequence n / k n-1 The value of is used to obtain a ratio array formed by ratios. If the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal travel increments is better.

[0024] More preferably, the increment is in the form of an arithmetic progression.

[0025] The present invention also provides a vehicle re-acceleration dynamic performance linearity objective evaluation system, comprising:

[0026] A data acquisition unit, used to acquire acceleration gains corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed, and send the acceleration gains to a data calculation unit;

[0027] The data calculation unit is used to calculate the linearity between the acceleration gains corresponding to different accelerator pedal travel increments, and when the linearity is better, it is judged that the linearity of the re-acceleration power performance corresponding to the vehicle at the current vehicle speed is better.

[0028] Preferably, the data calculation unit calculates the linearity between acceleration gains corresponding to different accelerator pedal stroke increments including:

[0029] Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2-k1, k3-k2...k n -k n-1 , to obtain a set of difference arrays formed by the difference values, wherein the higher the proximity between the difference values ​​in the difference array, the better the linearity between the acceleration gains corresponding to different accelerator pedal travel increments; or

[0030] Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2 / k1, k3 / k2...k n / k n-1 The value of , a ratio array formed by ratios is obtained, if the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better;

[0031] Wherein, i takes any value from 1 to n, and n is the number of acceleration gain data in the data group.

[0032] The above method uses the proximity of the difference or ratio between the acceleration gain data to objectively evaluate the re-acceleration power linearity of the vehicle when the vehicle is traveling at a uniform speed. The judgment method is simple, highly accurate, and easy to implement.

[0033] The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0034] The beneficial effect of the present invention is that the method can evaluate the linearity of the re-acceleration dynamic performance of a vehicle by obtaining the acceleration gains corresponding to different accelerator pedal stroke increments when the vehicle is traveling at a constant speed, and calculating the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments. In particular, when used for comparing the linearity of dynamic performance of two or more vehicles, the method can be evaluated intuitively and quantitatively. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a method for objectively evaluating the linearity of vehicle re-acceleration dynamic performance according to the present invention;

[0036] Figure 2 It is a schematic diagram of the vehicle speed and acceleration gain curve of the present invention. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0039] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0040] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0042] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0043] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".

[0044] Embodiment 1

[0045] Figure 1 The schematic diagram of the structure of a method for objectively evaluating the linearity of vehicle re-acceleration dynamic performance provided by a preferred embodiment of the present application is shown. For the sake of convenience, only the part related to the present embodiment is shown, which is described in detail as follows:

[0046] The present invention provides an objective evaluation method for the linearity of vehicle re-acceleration dynamic performance:

[0047] Obtain the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed;

[0048] The linearity between the acceleration gains corresponding to different accelerator pedal travel increments is calculated. When the linearity is better, it is determined that the linearity of the re-acceleration dynamic performance corresponding to the vehicle at the current vehicle speed is better.

[0049] More preferably, the different accelerator pedal stroke increments show an increasing trend in an arithmetic progression.

[0050] Preferably, the method of obtaining the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed includes:

[0051] The vehicle is driven at a constant speed, and an accelerator pedal stroke increment is selected in sequence in an incremental manner under the pedal stroke corresponding to the current vehicle speed to perform an accelerator pedal pressing action until the vehicle reaches a maximum acceleration, and the maximum acceleration corresponding to the current accelerator pedal stroke increment is recorded to obtain a maximum acceleration data group;

[0052] The acceleration gain under each accelerator pedal stroke increment is calculated in sequence according to the maximum acceleration data set, and the acceleration gain data set A=[k1, k2, k i ……k n ], i takes any value from 1 to n, and n is the number of acceleration gain data in the data group. The above method is used to select an accelerator pedal stroke increment in an incremental manner to perform the accelerator pedal pressing action, which is conducive to accurately obtaining the linear change relationship between the acceleration gains, thereby realizing the objective evaluation of the linearity of the re-acceleration dynamic performance.

[0053] More preferably, the acceleration gain under the accelerator pedal stroke increment is the ratio of the maximum acceleration to the corresponding accelerator pedal stroke increment.

[0054] Preferably, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is calculated including:

[0055] Calculate k2-k1, k3-k2...k in acceleration gain data group A in sequence n -k n-1 The value of is obtained to obtain a set of difference arrays formed by the difference values. If the closeness between the differences in the difference array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better.

[0056] Preferably, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is calculated including:

[0057] Calculate k2 / k1, k3 / k2, ... k in acceleration gain data group A in sequence n / k n-1 The value of is used to obtain a ratio array formed by ratios. If the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal travel increments is better.

[0058] More preferably, the increment is in the form of an arithmetic progression.

[0059] The present invention also provides a vehicle re-acceleration dynamic performance linearity objective evaluation system, comprising:

[0060] A data acquisition unit, used to acquire acceleration gains corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed, and send the acceleration gains to a data calculation unit;

[0061] The data calculation unit is used to calculate the linearity between the acceleration gains corresponding to different accelerator pedal travel increments, and when the linearity is better, it is judged that the linearity of the re-acceleration power performance corresponding to the vehicle at the current vehicle speed is better.

[0062] Preferably, the data calculation unit calculates the linearity between acceleration gains corresponding to different accelerator pedal stroke increments including:

[0063] Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2-k1, k3-k2...k n -k n-1 , to obtain a set of difference arrays formed by the difference values, wherein the higher the proximity between the difference values ​​in the difference array, the better the linearity between the acceleration gains corresponding to different accelerator pedal travel increments; or

[0064] Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2 / k1, k3 / k2...k n / k n-1 The value of , a ratio array formed by ratios is obtained, if the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better;

[0065] Wherein, i takes any value from 1 to n, and n is the number of acceleration gain data in the data group.

[0066] The above method uses the proximity of the difference or ratio between the acceleration gain data to objectively evaluate the re-acceleration power linearity of the vehicle when the vehicle is traveling at a uniform speed. The judgment method is simple, highly accurate, and easy to implement.

[0067] The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0068] Embodiment 2

[0069] This embodiment takes the driving habits and perception habits of customers in the actual driving process as the starting point, and proposes to evaluate the linearity of the vehicle's partial load re-acceleration dynamics based on the linear change relationship between the acceleration gains corresponding to a set of actual accelerator pedal stroke increments s1, s2, s3... pressed by the driver. Specifically, it is an objective evaluation method for the linearity between the vehicle's partial load re-acceleration dynamics corresponding to multiple stroke increments in an arithmetic progression such as s, s+b, s+2b, s+3b..., which includes the following process:

[0070] Step 1: When the vehicle is traveling at a certain speed v for dynamic performance evaluation, such as 60 km / h, the accelerator pedal is pressed with certain accelerator pedal travel increments s, s+b, s+2b, s+3b, etc., such as 10 mm, 15 mm, 20 mm, 25 mm, etc.; the accelerator pedal travel increments pressed and the maximum accelerations a1, a2, a3, a4, etc. reached by the vehicle are recorded; the selection of typical operating points and the data recording table are as follows:

[0071] Serial number 1 2 3 4 5 6 7 8 9 10 11 Vehicle speed (km / h) 10 20 30 40 50 60 70 90 110 130 150 Accelerator pedal travel increment s(mm) a1 Accelerator pedal travel increment s+b (mm) a2 Accelerator pedal travel increment s+2b (mm) a3 Accelerator pedal travel increment s+3b (mm) a4

[0072] Step 2: Extract the vehicle uniform speed v, accelerator pedal increments s1, s1+b, s1+2b, s1+3b, ... and vehicle accelerations a1, a2, a3, a4, ... in step 1;

[0073] Step 3: Divide the vehicle acceleration values ​​a1, a2, a3, a4, etc. by the accelerator pedal increments s, s+b, s+2b, s+3b, etc. to obtain a set of acceleration gain data sets A, including s-ACCGain, (s+b)-ACCGain, (s+2b)-ACCGain, (s+3b)-ACCGain, etc. and plot them as Figure 2 in the form of Figure 2 In the figure, the curves correspond to s-ACCGain, (s+b)-ACCGain, (s+2b)-ACCGain, and (s+3b)-ACCGain from bottom to top.

[0074] Step 4: Subtract or divide the group of acceleration gains s-ACCGain, (s+b)-ACCGain, (s+2b)-ACCGain, (s+3b)-ACCGain, etc. in sequence to obtain x1=[(s+b)-ACCGain]-[s-ACCGain], x2=[(s+2b)-ACCGain]-[(s+b)-ACCGain], x3=[(s+3b)-ACCGain]-[(s+2b)-ACCGain], etc. or y1=[(s+b)-ACCGain] / [s-ACCGain], y2=[(s+2b)-ACCGain] / [(s+b)-ACCGain], y3=[(s+3b)-ACCGain] / [(s+2b)-ACCGain], etc.;

[0075] Step 5: Use the calculation results of step 4 to objectively evaluate the linearity of the vehicle's re-acceleration power when the vehicle is traveling at a constant speed: the closer x1, x2, x3... or y1, y2, y3... are, the more linear the re-acceleration power corresponding to the vehicle speed.

[0076] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0077] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0078] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0079] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0080] Those skilled in the art may also understand that the various illustrative logical blocks, units, and steps listed in the embodiments of the present invention may be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly demonstrate the interchangeability of hardware and software, the various illustrative components, units, and steps described above have generally described their functions. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present invention.

[0081] The various illustrative logic blocks or units described in the embodiments of the present invention can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination of the above. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0082] The steps of the method or algorithm described in the embodiments of the present invention can be directly embedded in hardware, a software module executed by a processor, or a combination of the two. The software module can be stored in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or other storage media of any form in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a user terminal. Optionally, the processor and the storage medium can also be arranged in different components in the user terminal.

[0083] In one or more exemplary designs, the above functions described in the embodiments of the present invention can be implemented in hardware, software, firmware or any combination of the three. If implemented in software, these functions can be stored on a computer-readable medium, or transmitted in the form of one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media that facilitate the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by any general or special computer. For example, such computer-readable media can include but are not limited to RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program codes in the form of instructions or data structures and other forms that can be read by general or special computers, or general or special processors. In addition, any connection can be appropriately defined as a computer-readable medium, for example, if the software is transmitted from a website site, server or other remote resource through a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wirelessly, such as infrared, wireless and microwave, it is also included in the defined computer-readable medium. The disk and disc include compact disk, laser disk, optical disk, DVD, floppy disk and blue-ray disk. Disks usually copy data magnetically, while discs usually copy data optically with lasers. The above combination can also be included in computer readable media.

[0084] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for objectively evaluating the linearity of vehicle re-acceleration dynamic performance, characterized by: Obtain the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed, and obtain the acceleration gain data set A = [k1, k2, k i ……k n ], i takes any value from 1 to n, n is the number of acceleration gain data in the data group; Calculating the linearity between acceleration gains corresponding to different accelerator pedal travel increments, when the linearity is better, it is judged that the linearity of the re-acceleration dynamic performance corresponding to the vehicle at the current vehicle speed is better; The linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is calculated as follows: Calculate k2-k1, k3-k2...k in acceleration gain data group A in sequence n -k n-1 The value of , a set of difference arrays formed by the difference values ​​is obtained, if the closeness between the difference values ​​in the difference array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better; Alternatively, calculate k2 / k1, k3 / k2, ... k in acceleration gain data set A in sequence. n / k n-1 The value of is used to obtain a ratio array formed by ratios. If the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal travel increments is better.

2. The objective evaluation method for linearity of vehicle re-acceleration dynamic performance according to claim 1, characterized in that: The different accelerator pedal stroke increments are in an arithmetic progression increasing trend.

3. The objective evaluation method for linearity of vehicle re-acceleration dynamic performance according to claim 1, characterized in that: The method of obtaining the acceleration gain corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed includes: The vehicle is driven at a constant speed, and an accelerator pedal stroke increment is selected in sequence in an incremental manner under the pedal stroke corresponding to the current vehicle speed to perform an accelerator pedal pressing action until the vehicle reaches a maximum acceleration, and the maximum acceleration corresponding to the current accelerator pedal stroke increment is recorded to obtain a maximum acceleration data group; The acceleration gain under each accelerator pedal stroke increment is calculated in sequence according to the maximum acceleration data set.

4. The objective evaluation method for linearity of vehicle re-acceleration dynamic performance according to claim 3, characterized in that: The acceleration gain under the accelerator pedal stroke increment is the ratio of the maximum acceleration to the corresponding accelerator pedal stroke increment.

5. The objective evaluation method for linearity of vehicle re-acceleration dynamic performance according to claim 2, characterized in that: The increasing step is in the form of an arithmetic progression.

6. An objective evaluation system for the linearity of vehicle re-acceleration dynamic performance, characterized in that: include: A data acquisition unit, used to acquire acceleration gains corresponding to different accelerator pedal travel increments when the vehicle is traveling at a constant speed, and send the acceleration gains to a data calculation unit; A data calculation unit, used for calculating the linearity between acceleration gains corresponding to different accelerator pedal stroke increments, and when the linearity is better, it is judged that the linearity of the re-acceleration power performance corresponding to the vehicle at the current vehicle speed is better; The data calculation unit calculates the linearity between acceleration gains corresponding to different accelerator pedal stroke increments, including: Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2-k1, k3-k2...k n -k n-1 , to obtain a set of difference arrays formed by the difference values, wherein the higher the proximity between the difference values ​​in the difference array, the better the linearity between the acceleration gains corresponding to different accelerator pedal travel increments; or Calculate the acceleration gain data set A = [k1, k2, k i ……k n ] in k2 / k1, k3 / k2...k n / k n-1 The value of , a ratio array formed by ratios is obtained, if the closeness between the ratios in the ratio array is higher, the linearity between the acceleration gains corresponding to different accelerator pedal stroke increments is better; Wherein, i takes any value from 1 to n, and n is the number of acceleration gain data in the data group.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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