弁のおどりに関する力学的研究　１　　おどり現象の観察

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  • A Dynamic Study of Valve Jump Mechanism(1st Report, Observation of Jump Phenomena).

抄録

Overhead valve mechanism (OHV) is a widespread mechanism for internal combustion engine, but in this type of valve train, a serious problem known as valve jump is likely to occur at high speed. A rig test is arranged in such a way as to enable the measurement of the push rod force representing the vibration state of valve mechanism under different engine speed. By means of FFT analysis, the engine speed at which the first jump occurs can accurateiy be determined. Accurate detection of the part responsible for the jump can be achieved by isolating electrically all the parts constituting the valve train and measuring the different forces under different rpm's. It is clarified that valve jump is the phenomenon which separates between can and tappet, those which constitute valve mechanism.

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