公开(公告)号：US20130302192A1

公开(公告)日：2013-11-14

申请号：US13944270

申请日：2013-07-17

Applicant: Hitachi, Ltd.

Inventor： Kenichiro TOKUO ,  Satoshi USUI ,  Hiroyuki YAMADA ,  Junichi SHIMADA ,  Masami ABE

IPC: F04B53/10

CPC classification number: F04B53/10 ,  F02M59/102 ,  F02M59/366 ,  F02M59/367 ,  F02M63/0015 ,  F02M63/004 ,  F02M63/0042 ,  F02M63/0043 ,  F02M63/0078 ,  F02M63/025 ,  F02M2200/28 ,  F02M2200/304

Abstract: A plunger type high-pressure fuel pump includes a plunger reciprocated in a cylinder. A fluid pressurizing chamber of the pump has a chamber with a capacity that changes with reciprocation of the plunger. An electromagnetic valve is provided between the pressurizing chamber and a fluid suction passage; as well as a discharge valve. The electromagnetic valve includes a valve member including a suction valve; a solenoid coil adapted to displace the valve member; an anchor made of a magnetic material provided integrally with the valve member; and a core forming a magnetic circuit to attract the anchor by the electromagnetic force and dividing the inside of the electromagnetic valve into an internal space and an external space communicating with the fluid suction passage. The anchor or the core is provided with a fluid passage through which fluid can flow between the internal space and the external space formed by the anchor and the core, respectively, when the suction valve is in an opened state.

Abstract translation: 柱塞型高压燃料泵包括在气缸中往复运动的柱塞。 泵的流体加压室具有容积随柱塞往复运动而变化的腔室。 在加压室和流体抽吸通道之间设有电磁阀; 以及排气阀。 电磁阀包括具有吸入阀的阀构件; 适于移动所述阀构件的电磁线圈; 由与阀构件一体设置的磁性材料构成的锚固件; 以及形成磁路的磁芯，其通过电磁力吸引锚固件，并将电磁阀的内部分成内部空间和与流体抽吸通道连通的外部空间。 锚固件或芯部设置有流体通道，当吸入阀处于打开状态时，流体可以分别通过该流体通道在内部空间和由锚固件和芯部形成的外部空间之间流动。