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A Study of Valve Spring Surge in High-Speed Internal Combustion Engine
Published October 19, 1993 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Valve spring surge that is observed in high-speed internal combustion engines can cause valves to jump or bounce, resulting in part failure.
The intensity of such spring surge must be reduced in order to assure engine performance and reliability. In this study, it was found that reducing the valve spring clearance at full lift is effective in lowering the intensity of spring surge. This effect was confirmed experimentally and by numerical simulation. An application of the simulation program is also presented. It was confirmed that shifting the natural frequency of the inner and outer springs is effective in preventing valve jump or bounce even if spring surge occurs.