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Method for measuring rolling resistance coefficient of vehicle

A technology of rolling resistance coefficient and measurement method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of large rolling resistance and large rolling resistance coefficient, and achieve the effect of low cost, high precision and high precision

Active Publication Date: 2012-01-18
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

obviously k 0 It is larger than the actual rolling resistance, so the rolling resistance coefficient calculated according to the formula ② will also be too large

Method used

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  • Method for measuring rolling resistance coefficient of vehicle
  • Method for measuring rolling resistance coefficient of vehicle
  • Method for measuring rolling resistance coefficient of vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] 1. Meteorological conditions such as temperature measurement: the temperature during the test is 30°C, and the wind is light (<2m / s).

[0048] 2. Adjust the tire pressure: adjust the tire pressure to the vehicle manufacturer's recommended value of 220kPa under cold conditions.

[0049] 3. Configure the vehicle mass to m 1 : The test vehicle takes a driver, and then loads sandbags to make the vehicle quality reach the maximum design total mass of the vehicle of 2050kg.

[0050] 4. When the mass of the vehicle is m 1 Carry out the sliding test and record the data under certain conditions: Carry out 5 sets of sliding tests (one round trip) on a level, dry asphalt road surface, the initial speed is 50km / h, use a portable GPS device (sampling frequency 10Hz) to record the data of each sliding Vehicle speed-time curves and gliding distance, get 10 vehicle speed-time curves.

[0051] 5. Configure the vehicle mass to m 2 : All the sandbags are unloaded, leaving only one dri...

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Abstract

The invention discloses a method for measuring a rolling resistance coefficient of a vehicle by adopting a load changing method. The method for measuring the rolling resistance coefficient of the vehicle comprises the following steps of: calculating to acquire a running resistance and vehicle speed curve under conditions of masses m1 and m2 of the vehicle through a road sliding test; calculating to acquire an average value of increments, caused by the change of the mass, of running resistances; and finally calculating the rolling resistance coefficient. Compared with the conventional measurement method, the method has the advantages that measurement equipment is simple, the cost is low and the precision of the measured result is high.

Description

technical field [0001] The invention relates to the technical field of vehicle performance parameter testing, in particular to a method for measuring vehicle rolling resistance coefficient. Background technique [0002] At present, there are two main methods for measuring the vehicle rolling resistance coefficient (referred to as the rolling resistance coefficient). One is the bench measurement method represented by the GBT-18861 automobile tire rolling resistance measurement method. This method is currently recognized as more accurate. The method for measuring the rolling resistance coefficient; the other is the road measurement method, which uses a road sliding test (such as the GBT-12536 automobile sliding test method) to obtain a running resistance-vehicle speed curve, and then calculates the rolling resistance coefficient. In the latter method, the rolling resistance coefficient is often calculated as follows: Assuming that the running resistance of the vehicle when sli...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 张希波万方琦
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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