上升范围
It is proposed that there is a quicker valve-opening speed during the lift of the valve with asymmetrical, N-times harmonic wave cam, and an enlarged wrap angle during the buffer, which can effectively increase the lifting range of tappet stem and approve charging;
非对称N次谐波凸轮的气门上升段的气门开启速度可取得较大,并将缓冲段包角增大,可以有效地提高上升段的挺柱升程丰满系数,改善充气性能;
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