Function test device and method of engine variable valve timing (VVT) system

Abstract

The invention relates to a function test device and a function test method of an engine variable valve timing (VVT) system, wherein the function test device comprises crocodile clips, a lead and a phase control valve plug-in unit, one end of the lead is divided into two branches to be connected with a pair of crocodile clips, the other end of the lead is connected with the phase control valve plug-in unit, one crocodile clip is used for being connected with an external power source, the other crocodile clip is used for grounding, and the phase control valve plug-in unit is connected with a phase control valve of the VVT system. The device and the method have the advantages that the structure is simple, the design is reasonable, the cost is low, the test method has simple processes, is easy to use, whether the function of the engine VVT system is ineffective or not can be judged through dependently controlling the phase control valve during the development period of a VVT engine under the premise of no VVT drive data, the development period of the engine is shortened, and the research and development of new products are promoted.

Description

technical field [0001] The invention relates to an engine VVT ​​system function test device and a test method, belonging to the technical field of automobile engine maintenance and detection. Background technique [0002] At present, with the continuous development of automobile technology, variable valve timing (VVT) technology can significantly improve the charging efficiency and increase engine power, and is more and more widely used in the field of automobile engines. However, due to the invisibility of the engine VVT ​​system, in the development stage of the VVT ​​engine, due to the lack of complete matching electronic control unit (ECU) data, it is impossible to effectively judge whether the function of the engine VVT ​​system is effective, which may affect the development of new engines. 1. The production plan has a serious impact; if the VVT ​​function of the VVT ​​engine fails after batch production, it is often necessary to use a professional fault diagnosis instru...

AI Technical Summary

Problems solved by technology

However, due to the invisibility of the engine VVT ​​system, in the development stage of the VVT ​​engine, due to the lack of complete matching electronic control unit (ECU) data, it is impossible to effectively judge whether the function of the engine VVT ​​system is effective, which may affect the development of new engines. , The production plan has a serious impact; if the VVT ​​function of the VVT ​​engine fails after mass production, it is often necessary to use a professional fault diagnosis instrument to determine whether it is faulty, the process is complicated and the cost is high

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