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Method for measuring running resistance of automobile

A technology of driving resistance and measurement method, which is applied in the direction of vehicle testing, force/torque/power measuring instrument, measuring device, etc. It can solve the problems of high cost and long measurement period of the proving ground, and achieve low cost, short measurement period, The effect of high data accuracy

Active Publication Date: 2014-02-05
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the whole vehicle is subjected to high and low temperature environment simulation tests in the environmental chamber, and the driving resistance loaded on the vehicle by the chassis dynamometer needs to be measured in a professional test field. However, the test field has a long measurement period and high cost

Method used

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  • Method for measuring running resistance of automobile
  • Method for measuring running resistance of automobile
  • Method for measuring running resistance of automobile

Examples

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Embodiment 1

[0021] figure 1 It is a schematic diagram of the layout of the environmental chamber of a method for measuring the running resistance of a car in the present invention. This embodiment describes a method for measuring the running resistance of a car, which includes the following steps:

[0022] 1) Drive the vehicle at a constant speed on the expressway, and drive the vehicle at different gears and speeds, and record the engine oil temperature, engine outlet water temperature, engine inlet water temperature, exhaust temperature, Ambient temperature, ambient humidity and sunlight intensity parameters, and record the parameters in Table 1 and Table 2;

[0023] 2) Fix the vehicle on the chassis dynamometer, and adjust the temperature, humidity, and sunlight simulation control parameters of the environmental chamber to be the same as those measured outdoors in step 1;

[0024] 3) Use the chassis dynamometer to drag the vehicle so that the vehicle runs at a constant speed and gear ...

Embodiment 2

[0036] This embodiment describes a method for measuring the running resistance of an automobile, which includes the following steps,

[0037] 1. Run the vehicle for at least 30 minutes before the measurement to ensure that the engine oil temperature is at 90°C.

[0038] 2. Select an expressway with gentle road surface, drive the vehicle at a constant speed in different gears on the selected road section, measure engine water temperature, engine oil temperature, throttle opening and other parameters, and record the measured parameters in Table 1 and Table 2.

[0039] 3. After the expressway measurement is completed, fix the vehicle on the chassis dynamometer, adjust the control parameters of the environmental chamber such as temperature, humidity, and sunlight simulation to be the same as the parameters of the outdoor measurement, and set the chassis dynamometer to constant speed mode. The vehicle is operated until the engine oil temperature is at 90°C.

[0040] 4. According t...

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Abstract

The invention discloses a method for measuring the running resistance of an automobile. Outdoor condition parameters are simulated inside an environment cabin, the automobile runs on a chassis dynamometer at the constant speed by adjusting the opening degrees of a throttle, the wheel edge force of the chassis dynamometer and the driving force of the automobile are balanced when the automobile runs at the constant speed, and the wheel edge force of the chassis dynamometer at the moment is the running resistance of the automobile. The running resistance of the automobile under corresponding loads can be measured by loading the various loads such as full loads and half loads, measurement is not required to be carried out in a professional testing ground, road measurement data and environment cabin measurement data are compared, it is guaranteed that the error is smaller than 2% on the basis of road measurement parameters, accurate and reliable measurement data are guaranteed, the measurement period is short, cost is low, and the data accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of automobile measurement and testing, in particular to a method for measuring automobile running resistance. Background technique [0002] At present, the whole vehicle is subjected to high and low temperature environment simulation tests in the environmental chamber, and the driving resistance loaded on the vehicle by the chassis dynamometer needs to be measured in a professional test field. However, the test field has a long measurement period and high cost. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a method for measuring automobile running resistance with short measurement period, low cost and high data accuracy. [0004] In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a method for measuring automobile running resistance, comprising the following steps: [0005] 1) Drive the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01M17/007
Inventor 郑涛杜鸿震吕伟马胜龙
Owner CHERY AUTOMOBILE CO LTD
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