- 专利标题： Mechanism for restraining fuel pressure pulsation and high pressure fuel supply pump of internal combustion engine with such mechanism
-
申请号： US16126774申请日： 2018-09-10
-
公开(公告)号： US11047380B2公开(公告)日： 2021-06-29
- 发明人: Satoshi Usui , Shingo Tamura , Katsumi Miyazaki , Sunao Takahashi , Masayuki Suganami , Minoru Hashida
- 申请人： Hitachi Automotive Systems, Ltd.
- 申请人地址： JP Hitachinaka
- 专利权人： Hitachi Automotive Systems, Ltd.
- 当前专利权人： Hitachi Automotive Systems, Ltd.
- 当前专利权人地址： JP Hitachinaka
- 代理机构： Crowell & Moring LLP
- 优先权： JPJP2008-114758 20080425
- 主分类号： F04B53/16
- IPC分类号： F04B53/16 ; F02M55/04 ; F04B39/12 ; F04B11/00 ; F02M59/48 ; F02M37/00
摘要：
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.