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Method for measuring actual sliding resistance coefficient of electric vehicle by using VBOX equipment

A technology for electric vehicles and coasting resistance, which is applied to measuring devices, force/torque/power measuring instruments, and vehicle testing, etc., can solve the problems of complex measurement process and low accuracy of coasting resistance coefficient, etc., so as to improve the test efficiency and shorten the Development cycle, the effect of precise method

Pending Publication Date: 2021-11-16
德力新能源汽车有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low accuracy and complicated calculation process of the electric vehicle sliding resistance coefficient in the prior art, and propose a method of using VBOX equipment to measure the actual sliding resistance coefficient of the electric vehicle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method of using VBOX equipment to measure the actual sliding resistance coefficient of an electric vehicle proposed by the present invention comprises the following steps:

[0022] S1. Connect the VBOX device on the electric car and connect it to the computer;

[0023] S2. Find a horizontal road with a good adhesion coefficient. From 0 to 30 seconds, the speed of the electric vehicle will rise to half of the maximum speed at a constant speed; from 31 to 60 seconds, the speed of the electric vehicle will rise to 75% of the maximum speed; The speed of the car rises to the maximum speed at a constant speed, so that the speed of the electric vehicle reaches the maximum speed, and after running smoothly, switch the gear of the electric vehicle transmission to neutral;

[0024] S3. When the electric vehicle starts to slide, turn on the VBOX device, record the speed of the electric vehicle during the slide and the elapsed time corresponding to the time when the start of the ...

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Abstract

The invention belongs to the technical field of vehicle performance parameter testing, particularly relates to a method for measuring an actual sliding resistance coefficient of an electric vehicle by using VBOX equipment, and solves the problems of low accuracy of the sliding resistance coefficient of the electric vehicle and complex measurement and calculation process in the prior art. The method comprises the following steps that VBOX equipment is connected to an electric vehicle, and a computer is connected; a horizontal road with a good adhesion coefficient is found, and after the vehicle reaches the highest speed, a gear is switched to an N gear; when the vehicle starts to slide in the vehicle, the speed and time in the sliding process are recorded by using the VBOX equipment, and a sliding curve is recorded; and the recorded data are processed, a sliding resistance coefficient is measured and calculated, and finally verification is conducted according to the collected original data and results. According to the invention, by means of the VBOX equipment, the sliding curve is combed, then calculation is carried out, and the sliding resistance coefficient is very convenient and accurate to measure and calculate.

Description

technical field [0001] The invention relates to the technical field of vehicle performance parameter testing, in particular to a method for measuring the actual sliding resistance coefficient of an electric vehicle by using a VBOX device. Background technique [0002] The sliding resistance coefficient of a vehicle reflects the chassis transmission system and modeling design level of the vehicle. During the vehicle research and development process, a multi-wheel sliding resistance test is required to analyze the impact of chassis system component changes, design parameters, and vehicle shape optimization on improving vehicle driving resistance. , and finally combined with the power system performance parameter simulation to calculate the vehicle performance index, and make a reasonable market positioning for the research and development vehicle. Therefore, an accurate, reasonable, and comprehensive evaluation of vehicle sliding resistance is conducive to the setting and achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01L5/28
CPCG01M17/007G01L5/286
Inventor 曹俊奚晓翔刘海宝杨德超赵建新
Owner 德力新能源汽车有限公司
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