seating force

The influence of engine speeds and valve gaps on the valve seating force has been examined.

讨论了转速与气门间隙对落座力的影响。

The seating performance evaluating indicators were proposed. The control of valve seating velocity and holding force was investigated.

提出了气门落座特性的评价指标，研究了气门落座速度和落座保持的控制方法。

In this thesis, the calculation method of the elastic force and strength of varied section open-ring has been proVided, If this kind seating ring of supporting ring is used in cylinder case, the uniform elastie force ex-erted on cylinder wall by the ring is produced.

本文主要论证了变截面开口圆环的弹力集度及强度校核计算方法，缸套内采用这种密封环或支承环，可使圆环对缸壁沿圆周产生均匀的弹力。

Under the valve spring preload and seating impact force, the deformation at the site of contact accumulated more and more big, eventually leading to the valve seat fatigue failure.

气门座圈在预紧力和落座冲击力的共同作用下，在接触部位变形累计越来越大，最终导致气门座疲劳破坏。