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System testing method of multiple working condition loading of vehicle table amalog road test

A multi-working-condition, test-method technology, applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve the problem of affecting the accuracy of road tests, large test workload, and ignoring the equivalent inertia of vehicle neutral rotating parts. and other problems, to achieve the effect of improving detection accuracy and operability, and simplifying the test

Inactive Publication Date: 2005-03-23
吴明
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AI Technical Summary

Problems solved by technology

[0002] At present, how to determine the load and vehicle load of the inspected vehicle in each working condition of the road test when the vehicle's transient working condition pollutant emission detection, ASM working condition method exhaust emission detection, fuel economy detection and sliding performance detection are carried out on the chassis dynamometer in my country. The load on the test bench and the load of the vortex machine are usually determined by testing or estimating the load of each part. The test workload is relatively large, and some coefficients need to be estimated. error
In my invention patent application "Automobile multi-working condition simulation loading method on chassis dynamometer", it is difficult to meet the detection accuracy requirements for the high-precision simulation required for vehicle type certification and vehicle production consistency inspection.
During the sliding test of the existing vehicle neutral road test, the accuracy of the road test is affected due to the neglect of the equivalent inertia of the vehicle neutral rotating parts

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0054] 1. Use a sample car in good technical condition for each model series, first use the free and loaded sliding method twice or the free sliding method of increasing and decreasing inertia twice to obtain the m of each model series 3 、m 4 、m 5 、m 2 and the system resistance F at each speed point D , and input it into the computer, and then measure the system resistance F at each speed point by coasting in neutral on the road test t and the sliding distance from the specified initial speed to zero speed, and input it into the computer. Calibrate the eddy current machine at different stable temperatures, input the corresponding parameters of the eddy current machine temperature, vehicle speed, loading force and excitation current or corresponding control parameters into the computer, and automatically determine the control current according to the eddy current machine temperature, vehicle speed, and loading force.

[0055] 2. When carrying out the performance inspection ...

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Abstract

The invention is a system experiment method for multiple operating condition carriers in simulating road test. When detecting each kind of operating condition simulating to automobile road test with chassis dynamometer of automobile, it uses road test vehicle to slide in neutral gear to detect the system resistance at each speed point, uses free and secondary sliding method or secondary free sliding method by increasing or subtracting inertia, detects the system resistance at each speed point and the equivalent weight inertia of each part of the automobile, and detects the turbine force at each point, carries on accurate loading to automobile through the demarcation of the turbine. The method is accurate and quick.

Description

technical field [0001] The system test method of automobile bench test simulating road test multi-working condition load is to use road test and bench test system test method to determine the load of eddy current machine when the car simulates road test on chassis dynamometer for various performance tests, which belongs to automobile performance Detection method technical field. Background technique [0002] At present, how to determine the load and vehicle load of the inspected vehicle in each working condition of the road test when the vehicle's transient working condition pollutant emission detection, ASM working condition method exhaust emission detection, fuel economy detection and sliding performance detection are carried out on the chassis dynamometer in my country. The load on the test bench and the load of the vortex machine are usually determined by testing or estimating the load of each part. The test workload is relatively large, and som...

Claims

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Application Information

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IPC IPC(8): G01M17/007
Inventor 吴明
Owner 吴明
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