Acceleration performance test method for vehicle chassis and acceleration performance test method for vehicle

Abstract

An acceleration performance test method for a vehicle chassis. The acceleration performance test method for a vehicle chassis comprises: controlling a vehicle chassis (2) to perform accelerated motion at least in each of a first test environment and a second test environment, and at least respectively acquiring a first acceleration performance of the vehicle chassis (2) in the first test environment and a second acceleration performance of the vehicle chassis (2) in the second test environment (S21); and acquiring an overall acceleration performance of the vehicle chassis (2) at least on the basis of the first acceleration performance and the second acceleration performance, wherein the first test environment comprises one of a road of travel, a chassis test platform and a whole-vehicle test platform, and the second test environment comprises the other one of the road of travel, the chassis test platform and the whole-vehicle test platform (S22). In this way, the acceleration performance of a vehicle chassis can be tested, the reliability of the vehicle chassis and a vehicle is improved, and the test period of the acceleration performance of the vehicle can also be shortened. The present application further relates to an acceleration performance test method for a vehicle.

Description

Vehicle chassis acceleration performance test method and vehicle acceleration performance test method

[0001] This application claims priority to Chinese patent application No. 2024100121160, filed on January 3, 2024, entitled “Method for testing acceleration performance of vehicle chassis and method for testing acceleration performance of vehicle”, which is incorporated herein by reference in its entirety.

Technical field

[0002] The present application relates to the field of vehicle technology, and in particular to a method for testing the acceleration performance of a vehicle chassis and a method for testing the acceleration performance of a vehicle. [Background Technology]

[0003] Acceleration performance is a crucial aspect of vehicle performance, affecting not only the user experience but also driving safety. The chassis, as an essential independent component of a vehicle, significantly impacts its overall performance.

[0004] To evaluate a vehicle's acceleration performance, related technologies typically conduct full-vehicle acceleration tests, but fail to fully test the chassis. This not only results in a longer test cycle, but also prevents accurate verification of the chassis' acceleration performance when delivered as a standalone product. [Summary of the invention]

[0005] In view of the above problems, the present application provides a method for testing the acceleration performance of a vehicle chassis to realize the test of the acceleration performance of the vehicle chassis, thereby improving the reliability of the vehicle chassis and the vehicle, and it can also shorten the test cycle of the vehicle's acceleration performance.

[0006] In the first aspect, the present application provides an acceleration performance test for a vehicle chassis. The acceleration performance test method includes: controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment; obtaining the overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another of a driving road, a chassis test platform, and a whole vehicle test platform. The present application can realize a separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is delivered as an independent product, its acceleration performance is accurately verified; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by comprehensively considering the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0007] In some embodiments, the controlling of the vehicle chassis to perform acceleration motion under at least a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance of the vehicle chassis under the second test environment, respectively, includes: controlling the vehicle chassis to perform acceleration motion on a driving road and obtaining the first acceleration performance of the vehicle chassis; controlling the vehicle chassis to perform acceleration motion on a chassis test platform and obtaining the second acceleration performance of the vehicle chassis; and controlling the vehicle chassis to perform acceleration motion on a full vehicle test platform and obtaining a third acceleration performance of the vehicle chassis. The obtaining of the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance includes: obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance. This embodiment obtains the acceleration performance of the vehicle chassis under three different test environments, and comprehensively obtains the overall acceleration performance of the vehicle chassis based on the acceleration performance under the three test environments. Therefore, the overall acceleration performance not only takes into account the first acceleration performance of the vehicle chassis on an actual driving road, but also takes into account the second acceleration performance of the vehicle chassis under the experimental environment and the third acceleration performance of the full vehicle under the experimental environment, thereby improving the accuracy of the acceleration performance test of the vehicle chassis and the vehicle.

[0008] In some embodiments, the first acceleration performance includes a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a driving road; the second acceleration performance includes a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a chassis test platform; and the third acceleration performance includes a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a full vehicle test platform. This embodiment characterizes the acceleration performance of the vehicle chassis by the acceleration time from a preset starting speed to a preset ending speed. This is simple to implement, has high accuracy, and makes the evaluation and definition of acceleration performance more intuitive. Furthermore, this embodiment uses the same parameters to characterize acceleration performance under different test environments, which simplifies calculations and improves the accuracy of measuring the acceleration performance of the vehicle chassis.

[0009] In some embodiments, obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance includes calculating the average of the first acceleration duration, the second acceleration duration, and the third acceleration duration as the acceleration duration for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed. Calculating the average of the acceleration durations for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed under different test conditions as the acceleration performance of the vehicle chassis can improve the accuracy of testing the acceleration performance of the vehicle chassis.

[0010] In some embodiments, the above-mentioned method of obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance further includes: obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration; in response to the first difference, the second difference, and the third difference being less than or equal to a difference threshold, calculating the average of the first acceleration duration, the second acceleration duration, and the third acceleration duration as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. If it is determined that the difference between the acceleration durations of the vehicle chassis accelerating from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the acceleration durations measured for the vehicle chassis under multiple test environments have a small deviation, then the host computer calculates the average of the acceleration durations of the vehicle chassis accelerating from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

[0011] In some embodiments, the above-mentioned acquisition of the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance also includes: in response to one of the first difference, the second difference and the third difference being less than or equal to the difference threshold, and the other two being greater than the difference threshold, the average of the two acceleration durations corresponding to the difference less than the difference threshold is used as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. If one of the first difference, the second difference and the third difference is less than or equal to the difference threshold, and the other two are greater than the difference threshold, it can be considered that the test error of one of the test environments is large, and the corresponding test data is abandoned. The upper computer calculates the average of the other two acceleration durations with smaller deviations as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. In this way, test data with larger test errors can be automatically eliminated, thereby improving the test accuracy of the vehicle chassis.

[0012] In some embodiments, the above-mentioned control of the vehicle chassis to perform acceleration motions at least in a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment, respectively, includes: controlling the vehicle chassis to perform multiple acceleration motions on a driving road at multiple sets of different preset starting speeds and ending speeds, and obtaining a first acceleration duration of the vehicle chassis for each acceleration motion; controlling the vehicle chassis to perform multiple acceleration motions on a chassis test platform at multiple sets of different preset starting speeds and ending speeds, and obtaining a second acceleration duration of the vehicle chassis for each acceleration motion; controlling the vehicle chassis to perform multiple acceleration motions on a full vehicle test platform at multiple sets of different preset starting speeds and ending speeds, and obtaining a third acceleration duration of the vehicle chassis for each acceleration motion. This embodiment obtains the acceleration performance of the vehicle chassis under multiple acceleration conditions in each test environment, which can enrich the acceleration performance evaluation and parameter index definition of the vehicle chassis and vehicle.

[0013] In some embodiments, controlling the vehicle chassis to perform accelerated motion on the chassis test platform and obtaining the second acceleration performance of the vehicle chassis includes: obtaining a device loading curve; determining a resistance value of the vehicle chassis on the chassis test platform based on the device loading curve; and controlling the vehicle chassis to perform accelerated motion on the chassis test platform against the corresponding resistance value. This embodiment further sets the resistance between the vehicle chassis and the chassis test platform based on the device loading curve of the vehicle chassis, thereby simulating the accelerated motion of the vehicle chassis on an actual driving road, making the accelerated motion of the vehicle chassis on the chassis test platform more consistent with the accelerated motion on an actual driving road, thereby improving the accuracy of the vehicle chassis acceleration performance test.

[0014] In the second aspect, the present application provides an acceleration performance test for a vehicle. The acceleration performance test method includes: obtaining the overall acceleration performance of the vehicle chassis using the above-mentioned acceleration performance test method; obtaining the vehicle's entire vehicle acceleration performance based on the overall acceleration performance, the first attribute parameter of the vehicle chassis, and the second attribute parameter of the vehicle's upper body. This embodiment first tests the acceleration performance of the vehicle chassis alone, and then obtains the vehicle's entire vehicle acceleration performance based on the acceleration performance and first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle's upper body. It does not require an acceleration performance test for the entire vehicle, can improve the definition of vehicle and component parameter indicators at different levels in the vehicle development process, and can shorten the OEM's test cycle during the vehicle development process, simplify the process, and reduce the burden of results.

[0015] In some embodiments, the first attribute parameters include a first test mass of the vehicle chassis, a first frontal area of ​​the vehicle chassis, a tire rolling resistance coefficient of the vehicle chassis, and a first drag coefficient of the vehicle chassis; the second attribute parameters include a second test mass of the upper body, a second frontal area of ​​the upper body, and a second drag coefficient of the upper body. This embodiment uses the test mass, frontal area, tire rolling resistance coefficient, and first drag coefficient as relevant parameters for obtaining acceleration performance, thereby improving the accuracy of vehicle acceleration performance testing.

[0016] In some embodiments, the acceleration performance includes the acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed. The above-mentioned method of obtaining the vehicle's entire vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis, and the second attribute parameter of the vehicle's upper body includes: obtaining the fourth difference between the second test mass and the first test mass, the fifth difference between the second drag coefficient and the first drag coefficient, and the sixth difference between the second frontal area and the first frontal area, respectively; obtaining the product of the acceleration time, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient; and obtaining the sum of the percentage of the product and the acceleration time as the vehicle's entire vehicle acceleration time. This embodiment can obtain the vehicle's entire vehicle acceleration time through the above-mentioned preset relationship, and because the entire vehicle acceleration performance takes into account the acceleration time of the vehicle chassis, the attribute parameters of the vehicle chassis, and the attribute parameters of the upper body, it can improve the accuracy of the vehicle acceleration time test.

[0017] In some embodiments, the acceleration performance testing method further includes defining vehicle parameter indicators based on the vehicle acceleration performance and the overall acceleration performance of the vehicle chassis. This embodiment can define vehicle parameter indicators based on the vehicle acceleration performance and the overall acceleration performance of the vehicle chassis, which can improve the definition of vehicle and component parameter indicators at different levels during the vehicle development process.

[0018] Different from the prior art: The vehicle chassis acceleration performance testing method provided by the present application first controls the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtains at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment; then obtains the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another of the driving road, the chassis test platform, and the whole vehicle test platform. In this way, the present application can achieve a separate test of the acceleration performance of the vehicle chassis, so that the acceleration performance of the vehicle chassis can be accurately verified when it is delivered as an independent product; and the present application obtains the overall acceleration performance of the vehicle chassis based on the first acceleration performance of the vehicle chassis under at least the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the accuracy of the test of the vehicle chassis acceleration performance and thus improving its reliability.

Brief Description of the Drawings

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0020] FIG1 is a schematic structural diagram of some embodiments of the vehicle of the present application;

[0021] FIG2 is a flow chart of some embodiments of the acceleration performance testing method of the vehicle chassis of the present application;

[0022] FIG3 is a flow chart of other embodiments of the acceleration performance testing method for a vehicle chassis of the present application;

[0023] FIG4 is a schematic diagram of a specific flow chart of step S34 in the embodiment of FIG3 ;

[0024] FIG5 is another specific flow chart of step S34 in the embodiment of FIG3 ;

[0025] FIG6 is a schematic diagram of a specific flow chart of step S32 in the embodiment of FIG3 ;

[0026] FIG7 is a flow chart of some embodiments of the vehicle acceleration performance testing method of the present application;

[0027] FIG. 8 is a schematic diagram of a specific flow chart of step S72 in the embodiment of FIG. 7 .

[0028] The reference numerals in the detailed description are as follows: vehicle 1000 a ; battery 100 a ; controller 200 a ; motor 300 a ; upper vehicle body 1 ; vehicle chassis 2 . [Specific implementation method]

[0029] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0035] A vehicle usually consists of four major parts: the engine, the upper body, the vehicle chassis and the electrical equipment. Among them, the engine is the power unit of the vehicle. The function of the vehicle chassis is to support and install the assembly of the engine and other components to form the vehicle shape of the car, and to receive the power of the engine to make the vehicle move and ensure normal driving. The vehicle chassis consists of four parts: the transmission system, the running system, the steering system and the braking system. The electrical equipment consists of two major parts: the power supply and the electrical equipment. The upper body is installed on the vehicle chassis for the driver and passengers to ride or load cargo.

[0036] As an indispensable independent product of a vehicle, the performance of the vehicle chassis has a great impact on the overall performance of the vehicle.

[0037] In order to evaluate the acceleration performance of a vehicle, the related art only conducts acceleration performance tests at the vehicle level, that is, it is necessary to test the upper body and the vehicle chassis together, and does not consider and implement the acceleration performance test of the vehicle chassis. The acceleration performance test at the vehicle level not only leads to a longer test cycle for the vehicle's acceleration performance, but also results in the vehicle chassis as an independent delivery product. Its acceleration performance cannot be accurately verified, and its reliability is low. In addition, in the related art, the test method for the acceleration performance test at the vehicle level is simple, resulting in low test accuracy of the vehicle chassis and the vehicle's acceleration performance.

[0038] During the development of a vehicle chassis, especially an integrated intelligent chassis, in order to adapt to more upper bodies and components, it is necessary to define the performance attribute indicators of the vehicle chassis in the early stage of development. Therefore, it is very important to test the acceleration performance of the vehicle chassis. The technical solution provided in this application can realize the acceleration performance test of the vehicle chassis, so that the acceleration performance of the entire vehicle can be combined with the upper body for reference and verification.

[0039] Based on the above considerations, the acceleration performance testing method of the vehicle chassis provided in the present application first controls the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtains at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment; then obtains the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes the other of the driving road, the chassis test platform, and the whole vehicle test platform. In this way, the present application can realize a separate test of the acceleration performance of the vehicle chassis, so that the acceleration performance of the vehicle chassis can be accurately verified when it is delivered as an independent product; and the present application obtains the overall acceleration performance of the vehicle chassis based on the first acceleration performance of the vehicle chassis under at least the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the accuracy of the test of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0040] The acceleration performance test method of the vehicle chassis and the acceleration performance test method of the vehicle disclosed in the embodiments of the present application can be used for fuel vehicles, gas vehicles or new energy vehicles. The new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.

[0041] In some embodiments, as shown in FIG1 , a vehicle 1000a includes an upper body 1, a vehicle chassis 2, a controller 200a, and a motor 300a. A battery 100a is also disposed on the vehicle chassis 2. The battery 100a can be used to power the vehicle 1000a. For example, the battery 100a can serve as an operating power source for the vehicle 1000a. The controller 200a controls the battery 100a to power the motor 300a, for example, to meet the power requirements of the vehicle 1000a during startup, navigation, and driving.

[0042] The integrated chassis technology of electric vehicles, namely CTC (Cell to Chassis), is a battery technology that directly integrates the electrode assembly of the battery 100a into the vehicle chassis 2. It can reduce the footprint of the vehicle 1000a and the vehicle chassis 2 and reduce manufacturing costs, and can also increase the volume energy density of the battery 100a and load more batteries 100a.

[0043] Of course, the vehicle chassis provided in this application can be a CTC vehicle chassis or other vehicle chassis.

[0044] In some embodiments, as shown in FIG2 , the acceleration performance testing method of a vehicle chassis specifically includes the following steps:

[0045] Step S21: controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment.

[0046] Among them, the vehicle chassis of this embodiment is an integrated intelligent chassis with complete functions such as battery, motor, electronic control, acceleration, braking, and steering, and can be delivered as an independent product.

[0047] Among them, the acceleration performance of the vehicle chassis refers to the ability of the vehicle chassis to quickly increase its driving speed.

[0048] In one application scenario, during vehicle or chassis design, common operating conditions can be set based on research, WLTC and CLTC standard operating conditions, and road speed limit regulations. Common operating conditions include at least starting acceleration conditions and overtaking acceleration conditions. The host computer sets a preset throttle opening and a corresponding preset starting speed and a preset ending speed, and controls the throttle opening to the preset throttle opening through a throttle opening control device.

[0049] During the acceleration performance test of the starting acceleration condition, the vehicle chassis is at rest, the starting speed is preset to zero, and the tester or operating equipment adjusts the throttle opening of the vehicle chassis through the throttle opening control device, and makes the throttle opening fully open, the vehicle chassis starts and begins to accelerate; when the speed accelerates to the preset end speed, the throttle opening control device controls the throttle opening to be reduced to 0, entering the deceleration stage, and the throttle opening control device records the driving speed data;

[0050] When conducting an acceleration performance test under overtaking acceleration conditions, the tester or operating equipment adjusts the throttle opening of the vehicle chassis through the throttle opening control device to make the speed reach the preset starting speed. The throttle opening control device controls the throttle opening to be fully open, the vehicle chassis starts to accelerate, and starts to record the driving speed; when the vehicle chassis accelerates to the preset ending speed, the throttle opening control device controls the throttle opening to be reduced to 0, entering the deceleration stage, and the throttle opening control device records the driving speed data.

[0051] In one application scenario, the power spectrum of the vehicle speed signal can be analyzed, and the vehicle speed signal can be low-pass filtered to make the filtered speed curve smooth. The smoothed vehicle speed signal is then differentiated to obtain the acceleration signal, and finally the acceleration performance is obtained based on the acceleration signal.

[0052] This embodiment at least controls the vehicle chassis to adopt the above-mentioned method to control the vehicle chassis to perform accelerated movement in a first test environment and obtain a first acceleration performance, and controls the vehicle chassis to adopt the above-mentioned control method to control the vehicle chassis to perform accelerated movement in a second test environment and obtain a second acceleration performance.

[0053] Step S22: Obtaining the overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another one of a driving road, a chassis test platform, and a whole vehicle test platform.

[0054] The chassis test platform refers to a test platform used to test the acceleration performance of the vehicle chassis, which may include a four-motor test bench, etc., on which the driving environment of the vehicle chassis on the road can be simulated, thereby simulating the accelerated driving of the vehicle chassis; the whole vehicle test platform refers to a test platform used to test the acceleration performance of the whole vehicle, which may include a vehicle dynamometer, etc.

[0055] The present application can realize the separate testing of the acceleration performance of the vehicle chassis, so that the acceleration performance of the vehicle chassis can be accurately verified when it is delivered as an independent product; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by comprehensively considering the first acceleration performance of the vehicle chassis under at least the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

[0056] In some embodiments, steps S31 to S33 in the method as shown in Figure 3 can be used to control the vehicle chassis to perform acceleration movement at least under the first test environment and the second test environment, and at least obtain the first acceleration performance of the vehicle chassis under the first test environment and the second acceleration performance under the second test environment, that is, the above-mentioned step S21.

[0057] Step S31: controlling the vehicle chassis to perform accelerated motion on the driving road, and obtaining a first acceleration performance of the vehicle chassis.

[0058] In the actual use environment of the vehicle, that is, when certain driving and braking conditions are met on the driving road, the acceleration movement of the vehicle chassis on the driving road is controlled to perform an acceleration test to obtain the first acceleration performance of the vehicle chassis.

[0059] Step S32: controlling the vehicle chassis to perform accelerated motion on the chassis test platform, and obtaining a second acceleration performance of the vehicle chassis.

[0060] The vehicle chassis is mounted on a chassis test platform, and the vehicle chassis is controlled to perform accelerated motion on the chassis test platform to perform an acceleration test and obtain a second acceleration performance of the vehicle chassis.

[0061] Step S33: controlling the vehicle chassis to perform accelerated motion on the whole vehicle test platform, and obtaining a third acceleration performance of the vehicle chassis.

[0062] The vehicle chassis is mounted on a whole vehicle test platform, and the vehicle chassis is controlled to perform accelerated motion on the whole vehicle test platform to perform an acceleration test and obtain the third acceleration performance of the vehicle chassis.

[0063] The overall acceleration performance of the vehicle chassis can be obtained based on at least the first acceleration performance and the second acceleration performance, ie, the above-mentioned step S22, by step S34 in the method shown in FIG. 3 .

[0064] Step S34: Obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance.

[0065] The host computer processes the first acceleration performance, the second acceleration performance and the third acceleration performance to obtain the overall acceleration performance of the vehicle chassis.

[0066] This embodiment obtains the acceleration performance of the vehicle chassis under three different test environments respectively, and comprehensively obtains the overall acceleration performance of the vehicle chassis based on the acceleration performance under the three test environments. Therefore, the overall acceleration performance not only takes into account the first acceleration performance of the vehicle chassis on the actual driving road, but also takes into account the second acceleration performance of the vehicle chassis under the experimental environment and the third acceleration performance of the vehicle under the experimental environment, which can improve the test accuracy of the vehicle chassis and the acceleration performance of the vehicle.

[0067] In some embodiments, the overall acceleration performance of the vehicle chassis can be obtained based on a first acceleration performance of the vehicle chassis on a driving road and a second acceleration performance on a chassis test platform, or based on the first acceleration performance of the vehicle chassis on a driving road and a third acceleration performance on a whole vehicle test platform, or based on the second acceleration performance of the vehicle chassis on a chassis test platform and a third acceleration performance on a whole vehicle test platform, or based on the first acceleration performance of the vehicle chassis on a driving road, or based on the second acceleration performance of the vehicle chassis on a chassis test platform.

[0068] In some embodiments, the first acceleration performance includes a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a driving road; the second acceleration performance includes a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a chassis test platform; the third acceleration performance includes a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a whole vehicle test platform.

[0069] This embodiment characterizes the acceleration performance of the vehicle chassis by the acceleration time from a preset starting speed to a preset ending speed. This is simple and easy to implement, has high accuracy, and makes the evaluation and definition of acceleration performance more intuitive. In addition, this embodiment uses the same parameters to characterize the acceleration performance under different test environments, which can simplify calculations and improve the measurement accuracy of the acceleration performance of the vehicle chassis.

[0070] In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance and the third acceleration performance, that is, the above-mentioned step S34 specifically includes: calculating the average of the first acceleration duration, the second acceleration duration and the third acceleration duration as the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed.

[0071] The host computer calculates the average acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

[0072] In some embodiments, the mean is an average.

[0073] In some embodiments, the mean can be a weighted value, and weights can be set for multiple test environments based on historical data or actual needs. The upper computer obtains the weighted value based on the acceleration time and corresponding weights under multiple test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

[0074] In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance, and the third acceleration performance, that is, the above-mentioned step S34 specifically includes steps S41 and S42 as shown in FIG. 4 .

[0075] Step S41: respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration.

[0076] The host computer calculates the difference in acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed on any two of the driving road, chassis test platform and vehicle test platform.

[0077] Step S42: In response to the first difference, the second difference and the third difference being less than or equal to the difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed.

[0078] The difference threshold may be set based on specific test environments and performance requirements of the vehicle chassis.

[0079] If it is determined that the difference between the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the deviation of the acceleration times measured for the vehicle chassis under multiple test environments is small, then the upper computer calculates the average of the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

[0080] In some embodiments, the mean is an average value; or the mean can be a weighted value, and weight values ​​can be set for multiple test environments based on historical data or actual needs and other factors. The upper computer obtains the weighted value based on the acceleration time and corresponding weight value under multiple test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

[0081] In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance, and the third acceleration performance, that is, the above-mentioned step S34 specifically includes steps S51 to S53 as shown in Figure 5.

[0082] Step S51: respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration.

[0083] The host computer calculates the difference in acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed on any two of the driving road, chassis test platform and vehicle test platform.

[0084] Step S52: In response to the first difference, the second difference and the third difference being less than or equal to the difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed.

[0085] If it is determined that the difference between the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the deviation of the acceleration times measured for the vehicle chassis under multiple test environments is small, then the upper computer calculates the average of the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

[0086] Step S53: In response to one of the first difference, the second difference and the third difference being less than or equal to the difference threshold, and the other two being greater than the difference threshold, the average of the two acceleration durations corresponding to the differences less than the difference threshold is taken as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed.

[0087] If one of the first, second, and third differences is less than or equal to the difference threshold, and the other two are greater than the difference threshold, it is considered that one of the test environments has a large test error. The corresponding test data is discarded, and the host computer calculates the average of the other two acceleration times with smaller deviations as the acceleration time for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed. In this way, test data with large test errors can be automatically eliminated, thereby improving the accuracy of vehicle chassis testing.

[0088] If the first difference, the second difference and the third difference are all greater than the difference threshold, the host computer abandons the test data.

[0089] The difference threshold may be set based on specific test environments and performance requirements of the vehicle chassis.

[0090] In some embodiments, the mean is an average value; or the mean can be a weighted value, and weight values ​​can be set for multiple test environments based on historical data or actual needs and other factors. The upper computer obtains the weighted value based on the acceleration time and corresponding weight value under multiple test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

[0091] In some embodiments, the vehicle chassis is controlled to perform acceleration movements at least in a first test environment and a second test environment, and at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment are obtained, that is, the above-mentioned step S21 specifically includes: controlling the vehicle chassis to perform multiple acceleration movements on the driving road with multiple sets of different preset starting speeds and ending speeds, and obtaining a first acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on the chassis test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining a second acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on the whole vehicle test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining a third acceleration duration of the vehicle chassis for each acceleration movement.

[0092] Multiple sets of different preset starting speeds and ending speeds can be set based on the acceleration index of the vehicle chassis and the acceleration index of the vehicle. For example, the preset starting speed and ending speed can be (0km / h, 100km / h), (50km / h, 80km / h), (60km / h, 100km / h), (80km / h, 120km / h), etc., that is, the vehicle speed of the vehicle chassis under a variety of different test environments, that is, the acceleration time of working conditions such as 0-100km / h, 50-80km / h, 60-100km / h, 80-120km / h, etc.

[0093] This embodiment obtains the acceleration performance of the vehicle chassis under various acceleration conditions in each test environment, which can enrich the acceleration performance evaluation and parameter index definition of the vehicle chassis and the vehicle.

[0094] In some embodiments, the vehicle chassis is controlled to perform accelerated motion on the chassis test platform, and the second acceleration performance of the vehicle chassis is obtained, that is, the above-mentioned step S32 specifically includes steps S61 to S63 as shown in Figure 6.

[0095] Step S61: Obtaining a device loading curve.

[0096] The equipment loading curve can be obtained by referring to the vehicle end conversion or by looking up the table C.1 in the GB18352.5 standard.

[0097] Step S63: Determine the resistance value of the vehicle chassis on the chassis test platform based on the equipment loading curve.

[0098] In order to enable the vehicle chassis to drive normally on the chassis test platform, it is necessary to simulate the resistance value of the vehicle chassis on the driving road. The resistance value can be set based on the equipment loading curve of the vehicle chassis.

[0099] The chassis test platform can be provided with a damping simulation device connected to the wheel end of the vehicle chassis, such as a resistance motor. By setting the resistance output of the resistance motor to the wheel end of the vehicle chassis, the resistance conditions received by the vehicle chassis during actual driving under different working conditions can be simulated.

[0100] Step S63: Control the vehicle chassis to resist the corresponding resistance value and perform accelerated motion on the chassis test platform.

[0101] This embodiment further sets the resistance between the vehicle chassis and the chassis test platform based on the equipment loading curve of the vehicle chassis, so as to simulate the acceleration movement of the vehicle chassis on the actual driving road, so that the acceleration movement of the vehicle chassis on the chassis test platform is more consistent with the acceleration movement on the actual driving road, thereby improving the accuracy of the vehicle chassis acceleration performance test.

[0102] In some embodiments, the present application further proposes a method for testing the acceleration performance of a vehicle. As shown in FIG7 , the acceleration performance testing method of this embodiment specifically includes the following steps:

[0103] Step S71: Acquire the acceleration performance of the vehicle chassis.

[0104] In some embodiments, the vehicle chassis is controlled to perform acceleration motion at least under a first test environment and a second test environment, and at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment are obtained; the overall acceleration performance of the vehicle chassis is obtained based on at least the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another of a driving road, a chassis test platform, and a whole vehicle test platform. In this way, the present application can realize a separate test of the acceleration performance of the vehicle chassis, so that the acceleration performance of the vehicle chassis can be accurately verified when it is delivered as an independent product; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by comprehensively considering the acceleration performance under multiple test environments, thereby improving the accuracy of the test of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0105] In one application scenario, acceleration performance may include acceleration, controlling the vehicle chassis to accelerate on the driving road, and obtaining a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; controlling the vehicle chassis to accelerate on the chassis test platform, and obtaining a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; controlling the vehicle chassis to accelerate on the whole vehicle test platform, and obtaining a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; calculating the average of the first acceleration time, the second acceleration time and the third acceleration time as the acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed.

[0106] Step S72: Obtaining the vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis, and the second attribute parameter of the vehicle upper body.

[0107] The host computer obtains the acceleration performance of the vehicle based on the acceleration performance of the vehicle chassis, the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle, thereby realizing the acceleration performance test of the whole vehicle.

[0108] Different types of upper bodies can be loaded onto the vehicle chassis to test the acceleration performance of different vehicle models.

[0109] This embodiment first tests the acceleration performance of the vehicle chassis separately, and then obtains the acceleration performance of the vehicle based on the acceleration performance and first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body. There is no need to perform acceleration performance testing on the entire vehicle, which can improve the definition of vehicle and component parameter indicators at different levels in the vehicle development process, shorten the test cycle of the OEM in the vehicle development process, simplify the process and reduce the burden of results.

[0110] In some embodiments, the first attribute parameters include a first test mass of the vehicle chassis, a first frontal area of ​​the vehicle chassis, a tire rolling resistance coefficient of the vehicle chassis, and a first drag coefficient of the vehicle chassis; the second attribute parameters include a second test mass of the upper vehicle body, a second frontal area of ​​the upper vehicle body, and a second drag coefficient of the upper vehicle body.

[0111] In terms of vehicle acceleration performance, the biggest difference between the vehicle chassis and the entire vehicle is that the entire vehicle has an upper body, so its wind resistance is significantly greater than that of the vehicle chassis. Therefore, this embodiment uses the first frontal area and first drag coefficient of the vehicle chassis and the second frontal area and second drag coefficient of the upper body as consideration parameters for the acceleration performance test of the entire vehicle, which can improve the measurement accuracy of the acceleration performance of the entire vehicle.

[0112] Among them, the first test mass of the vehicle chassis refers to the sum of the curb mass and the load mass of the vehicle chassis; the second test mass of the upper body is the sum of the curb mass and the load mass of the upper body.

[0113] The rolling resistance coefficient of the tires on the vehicle chassis, that is, the tire specifications are defined during vehicle development. This can be found based on different starting and ending speeds, and the rolling resistance coefficient of the tires at the current vehicle speed can be calculated.

[0114] This embodiment uses the test mass, the vehicle's frontal area, the tire rolling resistance coefficient, and the first drag coefficient as relevant parameters for obtaining the acceleration performance, thereby improving the test accuracy of the vehicle's acceleration performance.

[0115] In some embodiments, the acceleration performance includes the acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed. The acceleration time may be an average of the acceleration times of the vehicle chassis from the preset starting speed to the preset ending speed under a variety of different test environments.

[0116] The process of obtaining the vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis, and the second attribute parameter of the vehicle upper body specifically includes steps S81 to S83 as shown in FIG. 8 .

[0117] Step S81: respectively obtaining a fourth difference between the second test mass and the first test mass, a fifth difference between the second drag coefficient and the first drag coefficient, and a sixth difference between the second frontal area and the first frontal area.

[0118] The upper computer obtains the fourth difference (M4′-M1′) between the second test mass M4′ and the first test mass M1′, the fifth difference (W2-W1) between the second drag coefficient W2 and the first drag coefficient W1, and the sixth difference (A2-A1) between the second frontal area A2 and the first frontal area A1.

[0119] Step S82: Obtain the product of the acceleration time, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient.

[0120] The host computer obtains the product of the acceleration time T4, the fourth difference (M4′-M1′), the fifth difference (W2-W1), the sixth difference (A2-A1), and the tire rolling resistance coefficient F1, namely T4*(M4′-M1′)*(W2-W1)*(A2-A1)*F1.

[0121] Step S83: Obtain the sum of the percentage of the product and the acceleration time as the entire vehicle acceleration time.

[0122] The upper computer obtains the percentage of the product (T4*(M4′-M1′)*(W2-W1)*(A2-A1)*F1) and the sum of the acceleration time T4, T5=[T4*{(M4′-M1′)*(W2-W1)*(A2-A1)*F1} / 100]+T4, which is the entire vehicle acceleration time.

[0123] This embodiment can obtain the vehicle's entire vehicle acceleration time through the above-mentioned preset relationship, and because the vehicle's acceleration performance takes into account the acceleration time of the vehicle chassis, the attribute parameters of the vehicle chassis and the attribute parameters of the upper body, it can improve the test accuracy of the vehicle's entire vehicle acceleration time.

[0124] In some embodiments, the acceleration performance testing method further includes defining vehicle parameter indicators based on the vehicle acceleration performance and the overall acceleration performance of the vehicle chassis. This embodiment can define vehicle parameter indicators based on the vehicle acceleration performance and the overall acceleration performance of the vehicle chassis, which can improve the definition of vehicle and component parameter indicators at different levels during the vehicle development process.

[0125] In some embodiments, the first curb mass M1, the first test mass M1′, the first frontal area A1, the tire rolling resistance coefficient F1 (the rolling resistance at the current vehicle speed can be searched and calculated according to different starting speeds and ending speeds), and the first drag coefficient W1 of the vehicle chassis are determined. After certain driving and braking conditions are met on the actual driving road, the acceleration verification of the vehicle chassis on the driving road is controlled to obtain a first acceleration time T1; the vehicle chassis is installed on a four-motor test bench, and the equipment loading curve is obtained (the conversion can be referred to the whole vehicle end or the table C.1 in GB18352.5 is looked up), and an acceleration test of the vehicle chassis is performed on the four-motor test bench to obtain a second acceleration time T2; the vehicle chassis is installed on a vehicle dynamometer, and an acceleration test of the vehicle chassis is performed on the vehicle dynamometer to obtain a third acceleration time T3; the difference between any two of T1, T2, and T3 is compared, when When the differences are all within 2‰, it is judged that the acceleration test of the vehicle chassis meets the index requirements, and the average value T4 of T1, T2, and T3 is calculated; when the acceleration time T4 of the vehicle chassis is determined, when matching different upper bodies, the second curb mass M4, the second test mass M4′, the frontal area A2, and the drag coefficient W2 of the upper body are determined, and the vehicle acceleration time T5 of the whole vehicle is calculated, T5=[T4*{((M4′-M1′)*(W2-W1)*(A2-A1)*F1)} / 100]+T4; according to the result of T5, verification is carried out on upper bodies of different shapes and weights, and compared with the simulation value to obtain the acceleration time of the whole vehicle; on the basis of T4, the acceleration time of the vehicle chassis under different test conditions, that is, working conditions (0-100km / h, 50-80km / h, 60-100km / h, 80-120km / h, etc.) is obtained. Through the above-mentioned method, this embodiment can realize the direct acceleration performance test of the vehicle chassis without the vehicle body parts installed; this embodiment can improve the definition of vehicle and component parameter indicators at different levels in the vehicle development process; this embodiment can also shorten the test cycle of the OEM in the vehicle development process, simplify the testing process and reduce the result burden; this embodiment can also enhance the use coverage of the vehicle chassis and adapt to more comprehensive and complete vehicle models.

[0126] Finally, it should be noted that the above embodiments 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, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for testing the acceleration performance of a vehicle chassis, characterized in that, The acceleration performance test method includes: Controlling the vehicle chassis to perform acceleration movements at least in a first test environment and a second test environment respectively, and at least respectively obtaining a first acceleration performance of the vehicle chassis in the first test environment and a second acceleration performance in the second test environment; Obtaining the overall acceleration performance of the vehicle chassis at least based on the first acceleration performance and the second acceleration performance; Wherein, the first test environment includes one of a driving road, a chassis test platform, and a vehicle test platform, and the second test environment includes the other of the driving road, the chassis test platform, and the vehicle test platform.

2. The acceleration performance test method according to claim 1, wherein The controlling the vehicle chassis to perform acceleration movements at least in a first test environment and a second test environment respectively, and at least respectively obtaining a first acceleration performance of the vehicle chassis in the first test environment and a second acceleration performance in the second test environment includes: Controlling the vehicle chassis to perform acceleration movement on the driving road and obtaining the first acceleration performance of the vehicle chassis; Controlling the vehicle chassis to perform acceleration movement on the chassis test platform and obtaining the second acceleration performance of the vehicle chassis; Controlling the vehicle chassis to perform acceleration movement on the vehicle test platform and obtaining the third acceleration performance of the vehicle chassis; The obtaining the overall acceleration performance of the vehicle chassis at least based on the first acceleration performance and the second acceleration performance includes: Obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance.

3. The acceleration performance test method according to claim 2, wherein The first acceleration performance includes a first acceleration duration of the vehicle chassis from a preset start speed to a preset end speed on the driving road; The second acceleration performance includes a second acceleration duration of the vehicle chassis from the preset start speed to the preset end speed on the chassis test platform; The third acceleration performance includes a third acceleration duration of the vehicle chassis from the preset start speed to the preset end speed on the vehicle test platform.

4. The acceleration performance test method according to claim 3, wherein The obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance includes: Calculating the mean of the first acceleration duration, the second acceleration duration, and the third acceleration duration as the acceleration duration of the vehicle chassis from the preset start speed to the preset end speed.

5. The acceleration performance test method according to claim 4, wherein The obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance further includes: Respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration; In response to the first difference, the second difference, and the third difference all being less than or equal to the difference threshold, calculate the average value of the first acceleration duration, the second acceleration duration, and the third acceleration duration as the acceleration duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed.

6. The acceleration performance test method according to claim 5, wherein The obtaining of the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance further includes: In response to one of the first difference, the second difference, and the third difference being less than or equal to the difference threshold and the other two being greater than the difference threshold, take the average value of the two acceleration durations corresponding to the difference less than the difference threshold as the acceleration duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed.

7. The acceleration performance test method according to claim 3, wherein The controlling the vehicle chassis to perform acceleration movements at least respectively in a first test environment and a second test environment, and at least respectively obtaining the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment includes: Controlling the vehicle chassis to perform multiple acceleration movements on the driving road at multiple different preset starting speeds and ending speeds, and obtaining the first acceleration duration of the vehicle chassis for each acceleration movement; Controlling the vehicle chassis to perform multiple acceleration movements on the chassis test platform at the multiple different preset starting speeds and ending speeds, and obtaining the second acceleration duration of the vehicle chassis for each acceleration movement; Controlling the vehicle chassis to perform multiple acceleration movements on the vehicle test platform at the multiple different preset starting speeds and ending speeds, and obtaining the third acceleration duration of the vehicle chassis for each acceleration movement.

8. The acceleration performance test method according to any one of claims 2 to 7, characterized in that The controlling the vehicle chassis to perform an acceleration movement on the chassis test platform and obtaining the second acceleration performance of the vehicle chassis includes: Obtaining the equipment loading curve; Based on the equipment loading curve, determining the resistance value of the vehicle chassis on the chassis test platform; Controlling the vehicle chassis to resist the corresponding resistance value and perform an acceleration movement on the chassis test platform.

9. A method for testing the acceleration performance of a vehicle, characterized in that, The acceleration performance test method includes: Adopting the acceleration performance test method according to any one of claims 1 to 8 to obtain the overall acceleration performance of the vehicle chassis of the vehicle; Based on the overall acceleration performance, the first attribute parameters of the vehicle chassis, and the second attribute parameters of the upper body of the vehicle, obtaining the overall vehicle acceleration performance of the vehicle.

10. The acceleration performance test method according to claim 9, characterized in that The first attribute parameters include the first test mass of the vehicle chassis, the first frontal area of the vehicle chassis, the tire rolling resistance coefficient of the vehicle chassis, and the first drag coefficient of the vehicle chassis; The second attribute parameters include the second test mass of the upper body, the second frontal area of the upper body, and the second drag coefficient of the upper body.

11. The acceleration performance test method according to claim 10, wherein, The acceleration performance includes the acceleration duration for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; obtaining the vehicle's overall acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis, and the second attribute parameter of the vehicle's upper body includes: respectively obtaining a fourth difference between the second test mass and the first test mass, a fifth difference between the second drag coefficient and the first drag coefficient, and a sixth difference between the second frontal area and the first frontal area; obtaining the product of the acceleration duration, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient; obtaining the sum of the percentage ratio of the product and the acceleration duration as the vehicle's overall acceleration duration.

12. The acceleration performance test method according to any one of claims 9 to 11, characterized in that The acceleration performance test method further includes: defining the parameter index of the vehicle based on the vehicle's overall acceleration performance and the overall acceleration performance of the vehicle chassis.

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