A Measurement System for Continuously Variable Valve Lift and Valve Timing

Abstract

The invention relates to a continuously-variable valve lift and valve timing measurement system, which comprises a measuring and controlling computer, an acquisition card, a crankshaft angle sensor, an electronic micrometer and an adjusting shaft angle equivalent measurement unit, wherein the measurement probe of the electronic micrometer is contacted with a top pressing plate of a valve spring; the input end of the adjusting shaft angle equivalent measurement unit is connected with the tail process hole of an adjusting shaft; the output end of the electronic micrometer is connected with the measuring and controlling computer; the output end of the adjusting shaft angle equivalent measurement unit is connected with the input end of the acquisition card; the input end of the crankshaft angle sensor is connected with an engine crankshaft timing end of an engine cylinder body and the output end is connected with the input end of the acquisition card; and the output end of the acquisitioncard is connected with the measuring and controlling computer. Sufficient data support can be provided for advanced engine benchmarking test data analysis by adopting a continuously-variable valve lift technology and related CAE simulation verification development, and the advanced engine benchmarking test price can be greatly improved.

Description

technical field [0001] The invention belongs to the field of automobile testing, in particular to a measuring system for continuously variable valve lift and valve timing. Background technique [0002] The benchmarking test and analysis of competitive products of the same level in the market, so as to accurately control the development trend and application status of advanced technology in the industry, has become one of the important work items in the product development stage of the automotive industry. However, not all key technical parameters can be directly or effectively measured during the benchmarking process. Incomplete measurement parameters will significantly reduce the benchmarking effect. [0003] Under different operating conditions of an engine that adopts continuously variable valve lift technology, the valve lift will change, and at the same time, the valve timing will be affected. Usually, the signal transmission of the valve lift adjustment control syste...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a system that can measure the lift of the engine's continuously variable valve and its valve timing in the benchmarking test, which can effectively solve the problem that the prior art cannot effectively and accurately measure different working conditions. As a result, the completeness and adequacy of the combustion analysis and performance analysis of the benchmarking engine after the benchmarking test are insufficient, and the value of the benchmarking test cannot fully reflect the problem

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