气阀机构就相当于一个交警，指挥空气和燃料在合适的时间进出引擎。
It lets air and fuel in and out of the engine at the proper time.
结果表明该方法是可行的，便于实现气阀机构故障的在线实时监测与诊断。
The results show that the method is feasible and effective on achieving the on-line motoring and the diagnosis of valve train faults.
通过模拟柴油机气阀机构的两种常见的主要故障：气阀漏气和气门间隙异常。
By simulating two kinds of main fault of a valve train, which are the gas leak and abnormal lash, the vibration signals of a cylinder head have been measured.
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