公开(公告)号：US20150233332A1

公开(公告)日：2015-08-20

申请号：US14704057

申请日：2015-05-05

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Minoru HASHIDA ,  Hiroyuki YAMADA ,  Masayuki SUGANAMI ,  Sunao TAKAHASHI ,  Toru ONOSE ,  Hideaki YAMAUCHI ,  Kazuichi ISHIGE

IPC: F02M59/10 ,  F02M59/44 ,  F02M59/02

CPC classification number: F02M59/102 ,  F02M59/025 ,  F02M59/44 ,  F02M59/442 ,  F04B1/0408 ,  F04B1/0426

Abstract: A high-pressure fuel pump includes a pump body, a plunger, a retainer, a spring that is configured to energize the plunger in a direction opposite to a direction of the pressurizing chamber, and a tappet covering the retainer from a side of an end portion of the retainer and the plunger. The retainer is provided with a projection portion protruding to a side of the tappet. The projection portion is separated from the tappet by a predetermined distance along an axial direction of the plunger.

Abstract translation: 高压燃料泵包括泵体，柱塞，保持器，弹簧，其构造成沿着与加压室的方向相反的方向对柱塞通电;以及从端部的侧面覆盖保持器的挺杆 保持器和柱塞的一部分。 保持器设置有突出部分，突出到挺杆的一侧。 突出部分沿着柱塞的轴向与挺杆分开预定的距离。

公开(公告)号：US20190003475A1

公开(公告)日：2019-01-03

申请号：US16126774

申请日：2018-09-10

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Satoshi USUI ,  Shingo TAMURA ,  Katsumi MIYAZAKI ,  Sunao TAKAHASHI ,  Masayuki SUGANAMI ,  Minoru HASHIDA

IPC: F04B53/14 ,  F02M59/48 ,  F02M37/00 ,  F02M59/44 ,  F04B11/00 ,  F04B9/04 ,  F04B35/01 ,  F02M55/04

Abstract: A high pressure fuel pump includes a pump housing, pressure and damper chambers, a metal diaphragm, a press-fitted portion, and a weld portion. The pressure chamber is provided in the pump housing. The damper chamber is formed by the pump housing and a damper cover. The metal diaphragm damper is arranged in the damper chamber. At the press-fitted portion, an annular surface of the damper cover is press fitted to an annular surface of the pump housing. The weld portion fixes the damper cover to the pump housing at an entire circumference of the press-fitted portion.

公开(公告)号：US20170276130A1

公开(公告)日：2017-09-28

申请号：US15617766

申请日：2017-06-08

Applicant: Hitachi, Automotive Systems, Ltd.

Inventor： Satoshi USUI ,  Shingo TAMURA ,  Katsumi MIYAZAKI ,  Sunao TAKAHASHI ,  Masayuki SUGANAMI ,  Minoru HASHIDA

IPC: F04B53/14 ,  F02M59/48 ,  F02M59/44 ,  F02M37/00 ,  F04B9/04 ,  F04B11/00 ,  F02M55/04 ,  F04B35/01

CPC classification number: F04B53/143 ,  F02M37/0041 ,  F02M55/04 ,  F02M59/442 ,  F02M59/48 ,  F04B9/042 ,  F04B11/0008 ,  F04B35/01

Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.