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Vehicle bench test simulation road test transient condition loading method

A transient working condition and road test technology, applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve problems such as poor operability and achieve the effect of reducing equipment costs

Active Publication Date: 2012-07-18
路亚科消防车辆制造有限公司
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AI Technical Summary

Problems solved by technology

The three methods (2), (3), and (4) need to determine the road test resistance and bench test resistance of the vehicle to be inspected, and also need to determine the equivalent inertia of the corresponding rotating parts of the vehicle, which is not easy to operate.

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] On a chassis dynamometer with a single inertia flywheel, a light gasoline vehicle is used as an example to measure exhaust gas emissions under a transient operating mode to illustrate the specific implementation of the transient operating mode loading method of the vehicle bench test simulation road test.

[0021] Suppose the basic mass of the single-inertia flywheel chassis dynamometer is 900kg, and the reference mass RM of the inspected vehicle is 1350kg, borrowing the full mechanical inertia to simulate the loading formula of the inertial flywheel chassis dynamometer, according to the standard GB18285-2005 "Ignition Engine Automobile exhaust pollutant emission limits and measurement methods (dual idle speed method and simple working condition method)" to conduct transient working condition exhaust emission detection. The specific implementation steps are as follows:

[0022] 1. Borrowing from the standard GB18352.3-2005 "Limits and Measurement Methods of Pollutant Emissio...

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Abstract

The invention relates to a vehicle bench test simulation road test transient condition loading method. According to test statistics, a formula of a difference of a road test system resistance formula and a bench test system resistance formula of vehicle neutral gear sliding in different reference quality ranges is obtained; there is no need to test a detected vehicle or calculate system resistance of the road test and the bench test. The vehicle reference quality is used to replace the sum of a vehicle translation quality and a correlated revolving member equivalent inertia and there is no need to measure the correlated revolving member equivalent inertia of the detected vehicle. When constant-speed condition simulation is carried out, the formula of the road test system resistance and bench test system resistance formula difference is used to determine a loading force to carry out constant force control; and when accelerated condition simulation is carried out, product of a difference between the vehicle reference quality and a stand basic quality and a regulated accelerated speed is added; and speed changing and loading force changing are employed to control loading.

Description

Technical field [0001] A vehicle bench test simulation road test transient condition loading method is a method for loading a power absorption device when a car or motorcycle simulates a road test transient condition on a chassis dynamometer, and belongs to the technical field of vehicle performance bench test detection methods. Background technique [0002] As the requirements for energy saving and emission reduction of vehicles become higher and higher, the bench test is used to simulate the transient conditions of the road test to detect the fuel consumption or exhaust emissions of automobiles or motorcycles. The transient conditions include idling, acceleration, constant speed, and deceleration conditions. , Which more comprehensively and accurately reflects the fuel consumption or exhaust emissions of the vehicle on the actual road. There are three types of inertia flywheels for chassis dynamometers used in the prior art, one is a non-inertia flywheel, the other is a single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 吴明
Owner 路亚科消防车辆制造有限公司
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