公开(公告)号：US07024980B2

公开(公告)日：2006-04-11

申请号：US10443850

申请日：2003-05-23

申请人： Takuya Uryu ,  Yoshihiko Onishi

发明人： Takuya Uryu ,  Yoshihiko Onishi

IPC分类号： F01B9/06

CPC分类号： F02M59/102 ,  F02M2200/02 ,  F04B1/0439

摘要： A high-pressure fuel pump of a simple construction is capable of distributing the position of contact between a tappet and a cam so as to improve durability of the tappet without causing seizure of a piston. A cylinder is arranged in a housing, and the piston is received in the cylinder for sliding reciprocation so that fuel is sucked into the cylinder and pressurized by the piston. The tappet is arranged inside one end of the housing for reciprocation, and contacts the cam, which rotates with a camshaft of an engine, so as transmit a driving force of the engine to the piston. A sleeve is arranged between the tappet and the housing, and clearance fitted to an outer peripheral surface of the tappet and an inner peripheral surface of the housing. The tappet is caused to rotate on its own axis by a frictional force generated between the cam and the tappet.

摘要翻译： 具有简单结构的高压燃料泵能够分配挺杆和凸轮之间的接触位置，从而提高挺杆的耐久性，而不会引起活塞的卡住。 气缸布置在壳体中，并且活塞容纳在气缸中用于滑动往复运动，使得燃料被吸入气缸并被活塞加压。 挺杆布置在壳体的一端内用于往复运动，并接触与发动机的凸轮轴一起旋转的凸轮，以将发动机的驱动力传递到活塞。 套筒布置在挺杆和壳体之间，并且间隙安装在挺杆的外周表面和壳体的内周表面上。 通过在凸轮和挺杆之间产生的摩擦力使得挺杆在其自身的轴线上旋转。