Engine valve mechanism motion characteristic test method and system thereof

Abstract

The invention provides an engine valve mechanism motion characteristic test method which comprises the following steps: S1, forming a mounting space in the cylinder body of an engine, arranging a laser displacement sensor in the mounting space, wherein the laser displacement sensor opposes the air valve of the valve mechanism, and the laser displacement sensor is used for measuring valve displacement of the engine valve mechanism; S2, driving the engine to operate through external power equipment, and acquiring a valve displacement signal which is measured by the laser displacement sensor in operation of the engine; and S3, comparing the valve displacement signal which is measured by the laser displacement sensor with a preset valve displacement signal, thereby determining whether the engine valve mechanism motion characteristic is abnormal. The invention further provides an engine valve mechanism motion characteristic test system. According to the engine valve mechanism motion characteristic test method, the laser displacement sensor in the engine cylinder is directly used for measuring the valve of the engine valve mechanism. The engine valve mechanism motion characteristic test method has advantages of: high versatility, convenient use and higher accuracy.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method and system for testing the motion characteristics of an engine valve mechanism. Background technique [0002] The gas distribution mechanism of the engine is the control mechanism of the intake and exhaust pipes. It regularly opens and closes the intake valve and exhaust valve of each cylinder according to the work sequence of each cylinder of the engine and the requirements of the working cycle of each cylinder, so that The fresh mixed gas enters the cylinder, and the combustion exhaust gas is discharged out of the cylinder to ensure sufficient intake and exhaust; when the intake valve and exhaust valve are closed, the cylinder is guaranteed to be sealed. [0003] The engine valve train includes a valve group and a valve drive group, the function of the valve group is to open and close the intake port and the exhaust port, and the function of the valve drive group is to make ...

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Problems solved by technology

[0006] Aiming at the aforementioned existing test methods that are not applicable to the engine of the cup-shaped hydraulic lifter and the test of using the seat displacement of the valve spring to determine the valve seat rebound, there will be technical problems of insufficient test versatility, convenience and accuracy. Provide a new test method for the motion characteristics of the engine valve train

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