It is mainly consisted of body, connecting pipe cushion container, piston chamber, disc, valve stem and other parts.

主要由阀体、连接管、缓冲容器、活塞室、阀瓣、阀杆等零件组件。

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Intake stroke: the camshaft opens the intake valve and the piston moves down the cylinder. This creates vacuum and sucks in air and fuel into the combustion chamber above the piston.

进气行程：凸轮轴打开进气阀，活塞在汽缸中向下运动，产生一段真空。

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When the coil power, the pilot valve by the spring return, pilot hole closed throttle valve chamber pressurized by the piston return spring and thrust, the electromagnetic valve is closed.

当线圈断电时，先导阀芯靠弹簧复位，先导孔关闭，阀腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。

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