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

Abstract

The invention discloses a vehicle chassis acceleration performance test method and a vehicle acceleration performance test method. The acceleration performance test method comprises the following steps: controlling a vehicle chassis to at least respectively perform acceleration motion in a first test environment and a second test environment, and at least respectively acquiring first acceleration performance of the vehicle chassis in the first test environment and second acceleration performance of the vehicle chassis in the second test environment; the overall acceleration performance of the vehicle chassis is obtained at least based on the first acceleration performance and the second acceleration performance; wherein the first test environment comprises one of a driving road, a chassis test platform and a whole vehicle test platform, and the second test environment comprises the other one of the driving road, the chassis test platform and the whole vehicle test platform. Through the mode, the acceleration performance of the vehicle chassis can be tested, the reliability of the vehicle chassis and the vehicle is improved, and the test period of the acceleration performance of the vehicle can be shortened.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, in particular to an acceleration performance test method for a vehicle chassis and an acceleration performance test method for a vehicle. Background Art

[0002] Acceleration performance is a crucial performance of a vehicle, which not only affects the user experience of the vehicle, but also affects the driving and riding safety, etc. And the vehicle chassis, as an essential independent product of the vehicle, has a great influence on the overall performance of the vehicle.

[0003] In order to evaluate the acceleration performance of a vehicle, in the related art, an acceleration performance test at the vehicle level is carried out, and the acceleration performance test of the vehicle chassis is not realized. The acceleration performance test at the vehicle level not only results in a long test cycle for the acceleration performance of the vehicle, but also causes the problem that when the vehicle chassis is an independently delivered product, its acceleration performance cannot be accurately verified. Summary of the Invention

[0004] In view of the above problems, the acceleration performance test method for a vehicle chassis provided by the present application is to realize the acceleration performance test 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 acceleration performance of the vehicle.

[0005] In a 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 an acceleration movement at least respectively in a first test environment and a second test environment, 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 a driving road, a chassis test platform, and a vehicle test platform. The present application can realize the separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is an independently delivered product, its acceleration performance can be accurately verified; and the overall acceleration performance of the vehicle chassis provided by the present application is comprehensively obtained based on at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, and can comprehensively consider the acceleration performance in various test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0006] In some embodiments, the above-mentioned control of the vehicle chassis performs acceleration movements at least in a first test environment and a second test environment respectively, and at least obtains the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, including: controlling the vehicle chassis to perform an acceleration movement on a driving road and obtaining the first acceleration performance of the vehicle chassis; controlling the vehicle chassis to perform an acceleration movement on a chassis test platform and obtaining the second acceleration performance of the vehicle chassis; controlling the vehicle chassis to perform an acceleration movement on a vehicle test platform and obtaining the third acceleration performance of the vehicle chassis; the above-mentioned obtaining of the overall acceleration performance of the vehicle chassis is at least based on the first acceleration performance and the second acceleration performance, including: obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance. In this embodiment, the acceleration performances of the vehicle chassis in three different test environments are obtained respectively, and the overall acceleration performance of the vehicle chassis is comprehensively obtained based on the acceleration performances in the three test environments. Therefore, the overall acceleration performance not only considers the first acceleration performance of the vehicle chassis on the actual driving road, but also considers the second acceleration performance of the vehicle chassis in the experimental environment and the third acceleration performance of the entire vehicle in the experimental environment, which can improve the test accuracy of the acceleration performance of the vehicle chassis and the vehicle.

[0007] In some embodiments, the first acceleration performance includes the first acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed on a driving road; the second acceleration performance includes the second acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed on a chassis test platform; the third acceleration performance includes the third acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed on a vehicle test platform. In this embodiment, the acceleration performance of the vehicle chassis is characterized by the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed, which is simple and easy to implement, and has high accuracy. The evaluation and definition of the acceleration performance are more intuitive; and in this embodiment, the same parameters are used to characterize the acceleration performance in different test environments, which can simplify the calculation and improve the measurement accuracy of the acceleration performance of the vehicle chassis.

[0008] In some embodiments, the above-mentioned 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 includes: calculating the mean value 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. Calculating the mean value of the acceleration durations of the vehicle chassis accelerating from a preset starting speed to a preset ending speed in different test environments as the acceleration performance of the vehicle chassis can improve the test accuracy of 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 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 a difference threshold, 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. If it is determined that the difference between the acceleration durations for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed in any two test environments is less than or equal to the difference threshold, that is, the deviation of the acceleration durations measured for the vehicle chassis in multiple test environments is small, the host computer calculates the average of the acceleration durations for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed in different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

[0010] 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 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, taking the average 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. 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 discarded. The host computer calculates the average of the other two acceleration durations with smaller deviations as the acceleration duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed. In this way, the test data with large test errors can be automatically eliminated, thereby improving the test accuracy of the vehicle chassis.

[0011] In some embodiments, the above-mentioned control of the vehicle chassis performs acceleration motions at least respectively in a first test environment and a second test environment, and at least respectively obtains the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, including: controlling the vehicle chassis to perform multiple acceleration motions on a driving road at multiple different preset starting speeds and ending speeds, and obtaining the 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 different preset starting speeds and ending speeds, and obtaining the second acceleration duration of the vehicle chassis for each acceleration motion; controlling the vehicle chassis to perform multiple acceleration motions on a vehicle test platform at multiple different preset starting speeds and ending speeds, and obtaining the third acceleration duration of the vehicle chassis for each acceleration motion. In this embodiment, the acceleration performance of the vehicle chassis under multiple acceleration conditions in each test environment is obtained, which can enrich the evaluation of the acceleration performance of the vehicle chassis and the vehicle and the definition of parameter indicators.

[0012] In some embodiments, the above-mentioned control of the vehicle chassis to perform an acceleration motion on a chassis test platform and obtain the second acceleration performance of the vehicle chassis includes: obtaining an equipment loading curve; determining the resistance value of the vehicle chassis on the chassis test platform based on the equipment loading curve; controlling the vehicle chassis to resist the corresponding resistance value and perform an acceleration motion on the chassis test platform. In this embodiment, the resistance between the vehicle chassis and the chassis test platform is further set based on the equipment loading curve of the vehicle chassis, so as to simulate the acceleration motion of the vehicle chassis on an actual driving road, making the acceleration motion of the vehicle chassis on the chassis test platform more in line with the acceleration motion on an actual driving road, thereby improving the accuracy of the vehicle chassis acceleration performance test.

[0013] In a 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 of the vehicle by using the above-mentioned acceleration performance test method; obtaining the vehicle's overall 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. In this embodiment, the acceleration performance of the vehicle chassis is first tested separately, and then the vehicle's overall vehicle acceleration performance is obtained based on the acceleration performance of the vehicle chassis, the first attribute parameter, and the second attribute parameter of the vehicle's upper body. There is no need to test the acceleration performance of the entire vehicle, which can improve the definition of vehicle and component parameter indicators at different levels in the vehicle development process, and can shorten the test cycle of the vehicle manufacturer in the vehicle development process, simplify the process and reduce the result burden.

[0014] In some embodiments, the first attribute parameters include the first test mass of the vehicle chassis, the first windward area of the vehicle chassis, the tire rolling resistance coefficient of the vehicle chassis, and the first aerodynamic drag coefficient of the vehicle chassis; the second attribute parameters include the second test mass of the upper body, the second windward area of the upper body, and the second aerodynamic drag coefficient of the upper body. In this embodiment, by using the test mass, the vehicle windward area, the tire rolling resistance coefficient, and the first aerodynamic drag coefficient as the relevant parameters for obtaining the acceleration performance, the test accuracy of the vehicle's acceleration performance can be improved.

[0015] In some embodiments, the acceleration performance includes the acceleration duration for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; the obtaining of the vehicle's overall acceleration performance based on the acceleration performance, the first attribute parameters of the vehicle chassis, and the second attribute parameters of the vehicle's upper body includes: respectively obtaining the fourth difference between the second test mass and the first test mass, the fifth difference between the second aerodynamic drag coefficient and the first aerodynamic drag coefficient, and the sixth difference between the second windward area and the first windward area; obtaining the product of the acceleration duration, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient; and obtaining the sum value of the percentage ratio of the product and the acceleration duration as the vehicle's overall acceleration duration. In this embodiment, the vehicle's overall acceleration duration can be obtained through the above preset relationship, and because the overall vehicle acceleration performance takes into account the acceleration duration of the vehicle chassis, the attribute parameters of the vehicle chassis, and the attribute parameters of the upper body, the test accuracy of the overall vehicle acceleration duration can be improved.

[0016] In some embodiments, the acceleration performance test method further includes: defining the parameter indicators of the vehicle based on the overall vehicle acceleration performance and the overall acceleration performance of the vehicle chassis. In this embodiment, the parameter indicators of the vehicle can be defined based on the overall vehicle acceleration performance and the overall acceleration performance of the vehicle chassis, which can improve the definition of the parameter indicators of vehicles and components at different levels in the overall vehicle development process.

[0017] Differences from the prior art: The acceleration performance testing method of the vehicle chassis provided by this application first controls the vehicle chassis to perform acceleration movements at least in a first test environment and a second test environment respectively, and at least obtains the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment respectively; 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 vehicle test platform, and the second test environment includes the other of a driving road, a chassis test platform, and a vehicle test platform. In this way, this application can achieve the separate testing of the acceleration performance of the vehicle chassis, enabling the acceleration performance of the vehicle chassis to be accurately verified when it is delivered as an independent product; and this application is based on the overall acceleration performance of the vehicle chassis obtained by comprehensively considering at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, and can comprehensively consider the acceleration performance in multiple test environments, thereby improving the testing accuracy of the acceleration performance of the vehicle chassis and thus enhancing its reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of this application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 is a schematic structural diagram of some embodiments of the vehicle of this application;

[0020] Figure 2 is a schematic flowchart of some embodiments of the acceleration performance testing method of the vehicle chassis of this application;

[0021] Figure 3 is a schematic flowchart of other embodiments of the acceleration performance testing method of the vehicle chassis of this application;

[0022] Figure 4 is Figure 3 a specific flowchart of step S34 in the embodiment;

[0023] Figure 5 is Figure 3 another specific flowchart of step S34 in the embodiment;

[0024] Figure 6 is Figure 3 a specific flowchart of step S32 in the embodiment;

[0025] Figure 7It is a schematic flowchart of some embodiments of the vehicle acceleration performance test method of the present application;

[0026] Figure 8 is Figure 7 A specific flowchart of step S72 in the embodiment.

[0027] The reference numerals in the detailed description are as follows:

[0028] Vehicle 1000a; battery 100a; controller 200a; motor 300a; upper body 1; vehicle chassis 2. Detailed description of the specific implementation

[0029] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field 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 description and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0031] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0032] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0033] In the description of the embodiments of this application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of sheets" refers to more than two sheets (including two sheets).

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0035] A vehicle generally consists of four major parts: an engine, an upper body, a vehicle chassis, and electrical equipment. Among them, the engine is the power device of the vehicle; the function of the vehicle chassis is to support and install the engine and the assemblies of other components, form the vehicle shape of the automobile, receive the power of the engine, make the vehicle move, and ensure normal driving; the vehicle chassis consists of four parts: a powertrain, a running gear, a steering system, and a braking system; the electrical equipment consists of two major parts: a power source and an electrical appliance; the upper body is installed on the vehicle chassis for the driver and passengers to ride or load goods.

[0036] As an essential independent product of a vehicle, the product 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 technology only conducts acceleration performance tests at the vehicle level, that is, it is necessary to conduct tests in combination with the upper body and the vehicle chassis, and does not consider and implement the acceleration performance test of the vehicle chassis. The acceleration performance test at the vehicle level not only results in a longer test cycle for the acceleration performance of the vehicle, but also leads to the problem that when the vehicle chassis is delivered as an independent product, its acceleration performance cannot be accurately verified and its reliability is not high. Moreover, in the related technology, the test method for the acceleration performance test at the vehicle level is simple, resulting in a low test accuracy for the acceleration performance of the vehicle chassis and the vehicle.

[0038] In the development process 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, the acceleration performance test of the vehicle chassis is crucial. The technical solution provided by the present application can realize the acceleration performance test of the vehicle chassis, so that the acceleration performance of the vehicle at the vehicle end can be referenced and verified in combination with the upper body.

[0039] Based on the above considerations, the acceleration performance test method for the vehicle chassis provided by this application first controls the vehicle chassis to perform acceleration movements at least in a first test environment and a second test environment respectively, and at least obtains the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment respectively; 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 vehicle test platform, and the second test environment includes the other of a driving road, a chassis test platform, and a vehicle test platform. In this way, this application can achieve the separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is an independently delivered product, its acceleration performance can be accurately verified; and this application is based on the overall acceleration performance of the vehicle chassis comprehensively obtained from at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, and can comprehensively consider the acceleration performance in multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis and thus improving its reliability.

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

[0041] In some embodiments, as Figure 1 shown, the vehicle 1000a includes an upper body 1, a vehicle chassis 2, a controller 200a, and a motor 300a. A battery 100a is also provided on the vehicle chassis 2. The battery 100a can be used for power supply of the vehicle 1000a. For example, the battery 100a can be used as the operating power source of the vehicle 1000a. The controller 200a is used to control the battery 100a to supply power to the motor 300a. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000a.

[0042] The integrated chassis technology of electric vehicles, that is, 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 floor area of the vehicle 1000a and the vehicle chassis 2 and reduce the manufacturing cost, and can also improve the volume energy density of the battery 100a to load more batteries 100a.

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

[0044] In some embodiments, as Figure 2 shown, the acceleration performance test method for the vehicle chassis specifically includes the following steps:

[0045] Step S21: Control the vehicle chassis to perform acceleration motions at least in a first test environment and a second test environment respectively, and at least obtain a first acceleration performance of the vehicle chassis in the first test environment and a second acceleration performance in the second test environment.

[0046] Among them, the vehicle chassis in 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 rapidly increase its driving speed.

[0048] In an application scenario, during the design of the whole vehicle or the vehicle chassis, based on investigations, WLTC and CLTC standard working conditions, road speed limit regulations, etc., common working conditions can be set. The common working conditions at least include a starting acceleration condition and an overtaking acceleration condition; the upper computer sets a preset throttle opening and corresponding preset starting speed and preset termination speed, and controls the throttle opening to the preset throttle opening through a throttle opening control device;

[0049] When conducting the acceleration performance test of the starting acceleration condition, when the vehicle chassis is in a stationary state and the preset starting speed is zero, a tester or an operating device, etc., adjusts the throttle opening of the vehicle chassis through the throttle opening control device and fully opens the throttle opening. The vehicle chassis starts and begins to accelerate; when the speed accelerates to the preset termination speed, the throttle opening control device controls the throttle opening to decrease to 0 and enters the deceleration stage, and the throttle opening control device records the driving speed data;

[0050] When conducting the acceleration performance test of the overtaking acceleration condition, a tester or an operating device, etc., 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, and the vehicle chassis starts to accelerate and begins to record the driving speed; when the vehicle chassis accelerates to the preset termination speed, the throttle opening control device controls the throttle opening to decrease to 0 and enters the deceleration stage, and the throttle opening control device records the driving speed data.

[0051] In an application scenario, it is possible to perform power spectrum analysis on the vehicle speed signal, perform low-pass filtering on the vehicle speed signal to make the filtered vehicle speed curve smooth, then take the derivative of the smooth vehicle speed signal to obtain an acceleration signal, and finally obtain the acceleration performance based on the acceleration signal.

[0052] This embodiment at least controls the vehicle chassis to perform acceleration motion by using the above method in the first test environment to obtain the first acceleration performance, and controls the vehicle chassis to perform acceleration motion by using the above control method in the second test environment to obtain the second acceleration performance.

[0053] Step S22: Obtain 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 vehicle test platform, and the second test environment includes the other of a driving road, a chassis test platform, and a vehicle test platform.

[0054] The chassis test platform refers to a test platform for testing the acceleration performance of the vehicle chassis, which may include a four-motor bench, etc. On the four-motor bench, the driving environment of the vehicle chassis on the road can be simulated, so as to simulate the accelerating driving of the vehicle chassis; the vehicle test platform refers to a test platform for testing the acceleration performance of the entire vehicle, which may include a vehicle dynamometer, etc.

[0055] This application can realize the independent test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is used as an independent delivery product, its acceleration performance can be accurately verified; and this application is based on the first acceleration performance of the vehicle chassis at least in the first test environment and the second acceleration performance in the second test environment to comprehensively obtain the overall acceleration performance of the vehicle chassis, which can comprehensively consider the acceleration performance in multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0056] In some embodiments, it can be achieved by steps S31 to S33 in the method as shown in Figure 3 to control the vehicle chassis to perform accelerating motions at least in the first test environment and the second test environment respectively, and at least obtain the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment respectively, that is, the above step S21.

[0057] Step S31: Control the vehicle chassis to perform an accelerating motion on the driving road and obtain the first acceleration performance of the vehicle chassis.

[0058] After certain driving and braking conditions are available on the actual use environment of the vehicle, that is, on the driving road, control the accelerating motion of the vehicle chassis on the driving road to conduct an acceleration test and obtain the first acceleration performance of the vehicle chassis.

[0059] Step S32: Control the vehicle chassis to perform an accelerating motion on the chassis test platform and obtain the second acceleration performance of the vehicle chassis.

[0060] Install the vehicle chassis on the chassis test platform, and control the vehicle chassis to perform an accelerating motion on the chassis test platform to conduct an acceleration test and obtain the second acceleration performance of the vehicle chassis.

[0061] Step S33: Control the vehicle chassis to perform an accelerating motion on the vehicle test platform and obtain the third acceleration performance of the vehicle chassis.

[0062] Mount the vehicle chassis on the vehicle complete test platform, and control the vehicle chassis to perform an acceleration motion on the vehicle complete test platform to conduct an acceleration test, so as to obtain the third acceleration performance of the vehicle chassis.

[0063] It can be achieved by step S34 in the method as shown in Figure 3 to obtain the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance, that is, the above-mentioned step S22.

[0064] Step S34: Obtain 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] In this embodiment, the acceleration performances of the vehicle chassis in three different test environments are respectively obtained, and the overall acceleration performance of the vehicle chassis is comprehensively obtained based on the acceleration performances in the three test environments. Therefore, this overall acceleration performance not only considers the first acceleration performance of the vehicle chassis on the actual driving road, but also considers the second acceleration performance of the vehicle chassis in the experimental environment and the third acceleration performance of the whole vehicle in the experimental environment, which can improve the test accuracy of the acceleration performance of the vehicle chassis and the vehicle.

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

[0068] In some embodiments, the first acceleration performance includes the first acceleration duration of the vehicle chassis accelerating from a preset start speed to a preset end speed on the driving road; the second acceleration performance includes the second acceleration duration of the vehicle chassis accelerating from a preset start speed to a preset end speed on the chassis test platform; the third acceleration performance includes the third acceleration duration of the vehicle chassis accelerating from a preset start speed to a preset end speed on the vehicle complete test platform.

[0069] In this embodiment, the acceleration performance of the vehicle chassis is characterized by the acceleration duration from the preset starting speed to the preset ending speed. This method is simple and easy to implement, with high accuracy. The evaluation and definition of the acceleration performance are more intuitive. Moreover, in this embodiment, the same parameters are used to characterize the acceleration performance in different test environments, which can simplify the calculation 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, step S34 specifically 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 starting speed to the preset ending speed.

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

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

[0073] In some embodiments, this mean can be a weighted value. Weights can be set for multiple test environments based on factors such as historical data or actual requirements. The host computer obtains the weighted value based on the acceleration durations and the corresponding weights in multiple test environments, and uses this 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, step S34 specifically includes Figure 4 steps S41 and S42 as shown below.

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

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

[0077] Step S42: 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 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 starting speed to the preset ending speed.

[0078] Among them, the difference threshold can be set based on specific test environments and the performance requirements of the vehicle chassis, etc.

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

[0080] In some embodiments, this average value is the arithmetic mean; or this average value can be a weighted value, and weight values can be set for multiple test environments based on factors such as historical data or actual requirements. The host computer obtains the weighted value based on the acceleration durations in multiple test environments and the corresponding weight values, and uses this 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, step S34 specifically includes steps S51 to S53 as Figure 5 shown in

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

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

[0084] Step S52: 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 of the vehicle chassis from the preset starting speed to the preset ending speed.

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

[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 difference less than the difference threshold is used as the acceleration duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed.

[0087] 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 relatively large, and the corresponding test data is discarded. The host computer calculates the average of the other two acceleration durations with smaller deviations as the acceleration duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed. In this way, the test data with relatively large test errors can be automatically excluded, thereby improving the test accuracy of the vehicle chassis.

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

[0089] Among them, the difference threshold can be set based on specific test environments and performance requirements of the vehicle chassis, etc.

[0090] In some embodiments, the average value is the arithmetic mean; or the average value can be a weighted value. Weight values can be set for multiple test environments based on factors such as historical data or actual requirements. The host computer obtains the weighted value based on the acceleration durations in multiple test environments and the corresponding weight values, and uses this 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 the first test environment and the second test environment, and at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment are obtained respectively. That is, the above step S21 specifically includes: controlling the vehicle chassis to perform multiple acceleration movements at multiple different preset starting speeds and ending speeds on the driving road, and obtaining the first acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements at multiple different preset starting speeds and ending speeds on the chassis test platform, and obtaining the second acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements at multiple different preset starting speeds and ending speeds on the vehicle test platform, and obtaining the third acceleration duration of the vehicle chassis for each acceleration movement.

[0092] Multiple groups 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 (0 km / h, 100 km / h), (50 km / h, 80 km / h), (60 km / h, 100 km / h), (80 km / h, 120 km / h), etc. That is, obtain the vehicle speeds of the vehicle chassis in multiple different test environments, that is, the acceleration durations under working conditions such as 0 - 100 km / h, 50 - 80 km / h, 60 - 100 km / h, 80 - 120 km / h, etc.

[0093] In this embodiment, obtaining the acceleration performance of the vehicle chassis under multiple acceleration working conditions in each test environment can enrich the evaluation of the acceleration performance of the vehicle chassis and the vehicle and the definition of parameter indicators.

[0094] In some embodiments, control the vehicle chassis to perform an acceleration movement on the chassis test platform, and obtain the second acceleration performance of the vehicle chassis. That is, step S32 specifically includes steps S61 to S63 as shown in Figure 6 the following.

[0095] Step S61: Obtain the equipment loading curve.

[0096] The equipment loading curve can be obtained by referring to the conversion of the vehicle end or by looking up the table according to 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, and this 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. The resistance output of the resistance motor to the wheel end of the vehicle chassis can be set to simulate the resistance situation received by the vehicle chassis during actual driving under different working conditions.

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

[0101] In this embodiment, further set 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, make the acceleration movement of the vehicle chassis on the chassis test platform more in line with the acceleration movement on the actual driving road, and thus improve the accuracy of the vehicle chassis acceleration performance test.

[0102] In some embodiments, the present application further provides an acceleration performance testing method for a vehicle. As Figure 7 shown, the acceleration performance testing method of this embodiment specifically includes the following steps:

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

[0104] In some embodiments, control the vehicle chassis to perform acceleration movements at least in a first test environment and a second test environment, and at least respectively obtain the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment; at least based on the first acceleration performance and the second acceleration performance, obtain the overall acceleration performance of the vehicle chassis; 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 a driving road, a chassis test platform, and a vehicle test platform. In this way, the present application can achieve the separate testing of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is used as an independently delivered product, its acceleration performance can be accurately verified; and the overall acceleration performance of the vehicle chassis obtained by the present application is based on at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, which can comprehensively consider the acceleration performance in multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis and thus improving its reliability.

[0105] In an application scenario, the acceleration performance may include acceleration. Control the vehicle chassis to perform an acceleration movement on a driving road, and obtain the first acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed; control the vehicle chassis to perform an acceleration movement on a chassis test platform, and obtain the second acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed; control the vehicle chassis to perform an acceleration movement on a vehicle test platform, and obtain the third acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed; calculate the average value 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.

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

[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 realize the acceleration performance test of vehicles of different models.

[0109] In this embodiment, the acceleration performance of the vehicle chassis is first tested separately, and then the overall vehicle acceleration performance of the vehicle is obtained based on the acceleration performance of the vehicle chassis, the first attribute parameters, and the second attribute parameters of the upper body of the vehicle. It is not necessary to test the acceleration performance of the whole vehicle, which can improve the definition of vehicle and component parameter indicators at different levels in the whole vehicle development process, and can shorten the test cycle of the vehicle manufacturer in the whole vehicle development process, simplify the process and reduce the result burden.

[0110] In some embodiments, 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.

[0111] In terms of the acceleration performance of the vehicle, the biggest difference between the vehicle chassis and the whole vehicle is that: due to the upper body equipped on the whole vehicle, its wind resistance is significantly greater than that of the vehicle chassis. Therefore, in this embodiment, the first frontal area and the first drag coefficient of the vehicle chassis, and the second frontal area and the second drag coefficient of the upper body are used as the consideration parameters for the acceleration performance test of the whole vehicle, which can improve the measurement accuracy of the overall vehicle acceleration performance.

[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 tire rolling resistance coefficient of the vehicle chassis, that is, the tire specification is defined during vehicle development, and it can be searched according to different starting speeds and ending speeds, and the tire rolling resistance coefficient at the current vehicle speed can be calculated.

[0114] In this embodiment, the test mass, the vehicle frontal area, the tire rolling resistance coefficient, and the first drag coefficient are used as the relevant parameters for obtaining the acceleration performance, which can improve the test accuracy of the vehicle acceleration performance.

[0115] In some embodiments, the acceleration performance includes the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. This acceleration duration can be the average value of the acceleration durations of the vehicle chassis accelerating from a preset starting speed to a preset ending speed under a variety of different test environments.

[0116] Obtaining the overall vehicle acceleration performance of the vehicle based on the acceleration performance, the first attribute parameters of the vehicle chassis, and the second attribute parameters of the upper body of the vehicle specifically includes steps S81 to S83 as Figure 8 shown.

[0117] Step S81: Obtain the fourth difference between the second test mass and the first test mass, the fifth difference between the second air resistance coefficient and the first air resistance coefficient, and the sixth difference between the second windward area and the first windward area respectively.

[0118] The host computer respectively 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 air resistance coefficient W2 and the first air resistance coefficient W1, and the sixth difference (A2 - A1) between the second windward area A2 and the first windward area A1.

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

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

[0121] Step S83: Obtain the sum value of the percentage ratio of the product and the acceleration duration as the vehicle's overall acceleration duration.

[0122] The host computer obtains the sum value T5 = [T4*{(M4′ - M1′)*(W2 - W1)*(A2 - A1)*F1} / 100] + T4 of the percentage ratio of the product (T4*(M4′ - M1′)*(W2 - W1)*(A2 - A1)*F1) and the acceleration duration T4 as the vehicle's overall acceleration duration.

[0123] In this embodiment, the vehicle's overall acceleration duration can be obtained through the above preset relationship. Moreover, since the overall vehicle acceleration performance takes into account the acceleration duration of the vehicle chassis, the attribute parameters of the vehicle chassis, and the attribute parameters of the upper body, the test accuracy of the overall vehicle acceleration duration can be improved.

[0124] In some embodiments, the acceleration performance test method further includes: defining the parameter indicators of the vehicle based on the overall vehicle acceleration performance and the overall acceleration performance of the vehicle chassis. This embodiment can define the parameter indicators of the vehicle based on the overall vehicle acceleration performance and the overall acceleration performance of the vehicle chassis, and can improve the definition of the parameter indicators of vehicles and components at different levels in the overall vehicle development process.

[0125] In some embodiments, the first curb weight 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 found and calculated according to different starting 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 vehicle chassis is controlled to perform an acceleration verification on the driving road to obtain the first acceleration duration T1. The vehicle chassis is installed on a four-motor test bench to obtain the equipment loading curve (which can refer to the conversion at the vehicle end or be looked up in Table C.1 in GB18352.5), and the vehicle chassis is subjected to an acceleration test on the four-motor test bench to obtain the second acceleration duration T2. The vehicle chassis is installed on a vehicle dynamometer, and the vehicle chassis is subjected to an acceleration test on the vehicle dynamometer to obtain the third acceleration duration T3. The differences between any two of T1, T2, and T3 are compared. When the differences are all within 2‰, it is determined 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 duration T4 of the vehicle chassis is determined, when matching different upper bodies, the second curb weight M4, the second test mass M4′, the frontal area A2, and the drag coefficient W2 of the vehicle with the upper body are determined, and the overall vehicle acceleration duration T5 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 with different shapes and weights, and compared with the simulation value to obtain the acceleration duration at the overall vehicle end. Based on T4, the acceleration durations of the vehicle chassis under different test conditions, that is, working conditions (such as 0 - 100 km / h, 50 - 80 km / h, 60 - 100 km / h, 80 - 120 km / h, etc.) are obtained. Through the above method, this embodiment can directly perform the acceleration performance test on the vehicle chassis without the upper body components; this embodiment can improve the definition of vehicle and component parameter indicators at different levels in the overall vehicle development process; this embodiment can also shorten the test cycle of the vehicle factory in the overall vehicle development process, simplify the test process and reduce the result burden; this embodiment can also enhance the usage coverage of the vehicle chassis and adapt to more comprehensive and perfect 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 limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, 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, characterized in that, The first acceleration performance includes a first acceleration duration for the vehicle chassis to accelerate from a preset start speed to a preset end speed on the driving road; The second acceleration performance includes a second acceleration duration for the vehicle chassis to accelerate from the preset start speed to the preset end speed on the chassis test platform; The third acceleration performance includes a third acceleration duration for the vehicle chassis to accelerate 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, characterized in that, 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 for the vehicle chassis to accelerate 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 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, characterized in that, 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 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 load curve; Based on the equipment load 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 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, characterized in that The acceleration performance includes the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed; obtaining the overall vehicle acceleration performance based on the acceleration performance, a first attribute parameter of the vehicle chassis, and a second attribute parameter of the upper body of the vehicle 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 overall vehicle 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 a parameter index of the vehicle based on the overall vehicle acceleration performance and the overall acceleration performance of the vehicle chassis.

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