valve lift curve 气门升程曲线 ; 阀升程图 ; 阀升距图
Calculation program of CAM lift curve is worked out. Valve train of engine is redesigned, and CAM is amended to FB2 type. Then, performance of engine is optimized further.
编制了凸轮升程曲线计算程序，对发动机的配气机构进行了重新设计，确定将配气凸轮修改成为FB2型，使得发动机性能得到进一步优化。
The magnitude of each velocity component and tangential velocity curve changed a lot and the changes were even more obvious along as increasing of the valve lift.
各速度的大小和切向速度分布曲线发生较大变化，并随升程的增大而更加明显；
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