For large discharge and lowlift head, it is especially suitable to use tubular pumps for their economic characteristics.
贯流泵是适用于大流量、低扬程的一种经济泵型。
2
Under low to medium load levels, the valves are set for lowlift and early closure to reduce pumping losses and improve fuel economy.
低中负荷水平下，阀门设置较低的升力系数和早期关闭泵损失减少，提高燃油经济性。
3
Using these inputs, the ECU is programmed to switch from the lowlift to the high lift cam lobes when the conditions mean that engine output will be improved.