计算结果表明，对称凸轮会得到一个不对称的气门运动规律。
It is found that the displacement, velocity and acceleration of air valve are unsymmetrical although the shape of CAM is symmetrical.
根据气门运动规律设计气门弹簧特性，按等强度原则设计组合式气门弹簧。
The design of the valve spring performance should be in accordance with the valve movement pattern and...
结果表明，采用高次多项式动力凸轮用于高速汽油机凸轮设计，能够获得相对平稳的气门运动特性。
The research results reveal that comparative valve balanced movement characteristic can obtain using high order polynomial dynamic cam in high speed gasoline engine.
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