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；
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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