Method for detecting exhaust spark trap device for automobile and detecting test stand

Abstract

The invention relates to a detecting method of a spark arrester for motor vehicle exhaust, fan rotating speed instructions corresponding to each gear are obtained by calculation or test according to the diameter gear-dividing of a tail pipe of an engine of the motor vehicle, a detecting test bed control system installed with fan rotating speed program control software is input so as to be used for changing the fan rotating speed to achieve standard air flow requirement in a conveying pipe, and then detection is carried out according to detection standard. The method has the advantages that a flow regulating valve on the conveying pipe is removed, the detection process has convenient operation and quick adjustment; the software controlling the fan rotating speed program guarantees the air flow stability inside the conveying pipe and causes detection data processing to be accurate; the gear-dividing of the tail pipe of the engine of the motor vehicle is carried out according to diameter, thus simplifying the procedure and bringing convenience for the detection operation of a quencher on the premise of guaranteeing the accuracy of the detection.

Description

technical field [0001] The invention relates to a performance detection method and a detection device of a spark extinguisher, in particular to a detection method and a detection test bench for a motor vehicle exhaust spark extinguisher for the spark extinguishment performance. Background technique [0002] The national standard GB13365-2005 "Motor Vehicle Exhaust Spark Extinguisher" stipulates that the spark extinguishing performance of the extinguisher is detected by the ratio of the activated carbon particles collected at the outlet of the extinguisher on the test device to the total amount of carbon particles used in the test. The existing spark extinguishing performance test is based on the engine displacement and rated speed of the vehicle that the extinguisher is suitable for, and the air flow in the test pipeline is adjusted with a regulating valve. The adjustment is troublesome and the detection speed is slow, which affects the accuracy of data processing, especially...

AI Technical Summary

Problems solved by technology

The existing spark extinguishing performance test is based on the engine displacement and rated speed of the vehicle that the extinguisher is suitable for, and the air flow in the test pipeline is adjusted with a regulating valve. The adjustment is troublesome and the detection speed is slow, which affects the accuracy of data processing, especially According to the engine displacement and rated speed of different vehicles, it is more difficult to adjust and the detection accuracy is difficult to guarantee. Therefore, for a long time, only the type test of the motor vehicle exhaust spark arrester is required, and no factory inspection is required for each product. Unqualified motor vehicle exhaust spark arresters are often the cause of accidents

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