- 专利标题: High pressure fuel supply pump for internal combustion engine
- 专利标题(中): 内燃机用高压供油泵
-
申请号: EP08007645.8申请日: 1999-06-18
-
公开(公告)号: EP1950411A1公开(公告)日: 2008-07-30
- 发明人: Yamada, Hiroyuki , Tahara, Shigenori , Saito, Atsuji , Takahashi, Yukio , Abe, Masami
- 申请人: Hitachi, Ltd. , Hitachi Car Engineering Co., Ltd.
- 申请人地址: 6-6, Marunouchi 1-chome Chiyoda-ku Tokyo 100-8280 JP
- 专利权人: Hitachi, Ltd.,Hitachi Car Engineering Co., Ltd.
- 当前专利权人: Hitachi, Ltd.,Hitachi Car Engineering Co., Ltd.
- 当前专利权人地址: 6-6, Marunouchi 1-chome Chiyoda-ku Tokyo 100-8280 JP
- 代理机构: Beetz & Partner
- 优先权: JP3161999 19990209; JP12990399 19990511
- 主分类号: F02M59/46
- IPC分类号: F02M59/46 ; F02M59/36 ; F02M63/02 ; F04B49/24 ; F02M59/44 ; F04B53/16
摘要:
The invention provides a high pressure fuel supply pump having a cylinder (108) being press-fitted into a pump body (100) at a press-fitted portion (108c),a plunger (102) for engaging slidably with a sliding hole (108a) which is formed at said cylinder (108), and an end of said plunger (102) is reciprocating in a pressurizing chamber (112) formed in said pump body (100), an intake valve mechanism (105, 105a) provided at a fuel inlet (220B) of said pressurizing chamber (112), a low pressure fuel passage (110) formed at said pump body (100) for introducing fuel into said fuel inlet (220B), an exhaust valve mechanism (106, 106a) provided at a fuel outlet (106b) of said pressurizing chamber (112), a seal member (120) arranged at an outer surface of a portion of said plunger (102) which is projecting from an end side of said cylinder (108) opposite to said pressurizing chamber (112) such that a fuel chamber (107) is formed by covering said end side of said cylinder (108) opposite to said pressurizing chamber (112) with said seal member (120).
According to the invention, an end portion of said sliding hole (108a) of said cylinder and a lower end of an opening portion of said pump body (100) into which said cylinder is inserted are arranged to discharge into said fuel chamber (107).
According to the invention, an end portion of said sliding hole (108a) of said cylinder and a lower end of an opening portion of said pump body (100) into which said cylinder is inserted are arranged to discharge into said fuel chamber (107).
公开/授权文献
信息查询