公开(公告)号：EP2055929A3

公开(公告)日：2010-12-08

申请号：EP08018891.5

申请日：2008-10-29

Applicant: Hitachi Ltd.

Inventor： Aritomi, Shunsuke ,  Maekawa, Noriyuki ,  Machimura, Hideki ,  Nemoto, Masashi

IPC: F02M59/34 ,  F02M59/46 ,  G05D7/01 ,  F04B49/24 ,  F02M37/00

CPC classification number: F02M63/0265 ,  F02M37/0029 ,  F02M37/0052 ,  F02M59/366 ,  F02M63/0036 ,  F02M63/005 ,  F02M63/0054 ,  F04B49/035 ,  G05D7/0133

Abstract: An object of the present invention is to reduce the pressure loss in a relief valve employed for a high-pressure liquid supply pump. Disclosed is a high-pressure liquid supply pump for pressurizing a liquid and supplying the pressurized liquid from a low-pressure side to a high-pressure side. The pump includes a relief path (210) which releases the pressurized liquid from the high-pressure side (12) to the low-pressure side (100), and a relief valve (200) which is positioned in the relief path (210) and equipped with an intermediate chamber (207), a valve seat (201) positioned toward the high-pressure side (12) of the intermediate chamber (207), a ball valve (202) that is attachable to and detachable from the valve seat (201), and a ball valve retainer (203) for pressing the ball valve (202) against the valve seat (201). The relief path (210) is configured so that an inflow path to the intermediate chamber (207) and an outflow path from the intermediate chamber (207) both produce a restriction effect. The ball valve retainer (203) has a pressure reception surface for receiving the pressure from the intermediate chamber (207). A first pressure reception area, which detaches the ball valve (202) from the valve seat (201) upon receipt of liquid pressure of the pressurized liquid from a high-pressure section when the relief valve (200) closes, is smaller than a second pressure reception area, which lifts the ball valve (202) and the ball valve retainer (203) upon receipt of liquid pressure from the intermediate chamber (207).

公开(公告)号：EP1310577A1

公开(公告)日：2003-05-14

申请号：EP02004241.2

申请日：2002-02-26

Applicant: Hitachi, Ltd.

Inventor： Yamaguchi, Shizuka ,  Baba, Noboru ,  Nagayama, Toshiaki ,  Terakado, Katsuyoshi ,  Kagiyama, Arata ,  Machimura, Hideki ,  Yamada, Hiroyuki ,  Takahashi, Yukio ,  Kotaki, Masayoshi ,  Ojima, Kazuo

IPC: C23C8/80 ,  C23C28/00 ,  F02M59/44 ,  F02M63/02 ,  F04B1/12 ,  F04B1/14 ,  F04B53/14

CPC classification number: C23C28/044 ,  C23C8/80 ,  C23C28/00 ,  C23C28/048 ,  F02M59/102 ,  F02M59/366 ,  F02M59/445 ,  F02M63/0225 ,  F02M2200/02 ,  F04B1/0408 ,  F04B1/0413 ,  F04B1/0421 ,  F04B1/0426 ,  F04B1/143 ,  F04B1/146 ,  F05C2253/12

Abstract: The invention relates to a fuel pump, of which sliding mechanism parts in its fuel chamber have good wear resistance under a severe environment, and to a direct fuel injection engine using the fuel pump.
In a fuel pump for pressurizing and delivering fuel to a fuel injector of a vehicle engine, at least one of sliding surfaces of a slant plate (9), a slipper (10) and a plunger (11) sliding in a lubricating oil and at least one of sliding surfaces of sliding members of a plunger (11) and a cylinder (13) contacting with and sliding on each other through the fuel are formed of a hardened layer composed of any one of a nitrided layer, a carburization-quenched layer and a carbonitrided layer, or coated with a high corrosion resistant and hard metal compound layer over the hardened layer.

Abstract translation: 本发明涉及一种燃料泵，其燃料室中的滑动机构部件在恶劣的环境下具有良好的耐磨性，以及使用该燃料泵的直接燃料喷射发动机。 在用于将燃料加压并输送到车辆发动机的燃料喷射器的燃料泵中，倾斜板（9），拖鞋（10）和在润滑油中滑动的柱塞（11）的滑动表面中的至少一个 柱塞（11）和与燃料接触并相互滑动的气缸（13）的滑动构件的至少一个滑动表面由由氮化层，渗碳淬火层 和碳化渗碳层，或者在硬化层上涂覆高耐腐蚀和硬质金属化合物层。

公开(公告)号：EP1063428A3

公开(公告)日：2001-10-31

申请号：EP00104550.9

申请日：2000-03-13

Applicant: Hitachi, Ltd.

Inventor： Ono, Yoshinobu ,  Takahashi, Yukio ,  Machimura, Hideki ,  Hashida, Minoru ,  Kotaki, Masayoshi ,  Yamamura, Takefumi

IPC: F04B1/20 ,  F04B1/14 ,  F04B1/12 ,  F04B53/16

CPC classification number: F04B1/2021 ,  F04B1/122 ,  F04B1/14 ,  F04B53/164

Abstract: The present invention provides an axial plunger pump which does not need bellows by restricting fuel to a cylinder bore (13) configuring a pump portion and by lubricating the other portion with oil. The high pressure fuel pump comprises a plunger (11) reciprocating according to a shaking movement of a swash plate (9), a cylinder block (12) forming a pump chamber (14) together with the plunger (11), and a sealing member provided between the plunger and a cylinder bore for sealing oil leaked from the pump chamber (14) to a chamber surrounding the pump chamber (14), wherein oil in the oil chamber is supplied from the outside of the high pressure fuel pump.

公开(公告)号：EP2055934B1

公开(公告)日：2013-05-15

申请号：EP08019127.3

申请日：2008-10-31

Applicant: Hitachi Ltd.

Inventor： Munakata, Akihiro ,  Machimura, Hideki ,  Hosokawa, Kazutaka

IPC: F02M59/48 ,  F04B53/16 ,  B23K33/00 ,  F02M59/02

CPC classification number: F02M59/02 ,  B23K11/16 ,  B23K11/26 ,  B23K20/023 ,  B23K33/006 ,  B23K33/008 ,  B23K2201/04 ,  B23K2203/02 ,  F02M59/48 ,  F02M59/485 ,  F02M2200/8084 ,  F04B1/0404 ,  F04B53/168

公开(公告)号：EP1995446B1

公开(公告)日：2011-02-23

申请号：EP08009388.3

申请日：2008-05-21

Applicant: Hitachi Ltd.

Inventor： Munakata, Akihiro ,  Machimura, Hideki ,  Yamauchi, Hideaki ,  Kitajima, Daisuke ,  Nemoto, Masashi

IPC: F02M55/04 ,  F02M59/48 ,  G05D16/06

CPC classification number: F02M55/04 ,  F02M59/102 ,  F02M59/366 ,  F02M59/367 ,  F02M59/48 ,  F02M63/0225 ,  F02M2200/315 ,  F04B11/0016

公开(公告)号：EP1378664A3

公开(公告)日：2009-03-11

申请号：EP02024405.9

申请日：2002-10-28

Applicant: Hitachi, Ltd.

Inventor： Yamaguchi, Shizuka ,  Baba, Noboru ,  Takahashi, Masaya ,  Terakado, Katsuyoshi ,  Kagiyama, Arata ,  Kotaki, Masayoshi ,  Sawada, Shogo ,  Ojima, Kazuo ,  Yamada, Hiroyuki ,  Machimura, Hideki ,  Takahashi, Yukio

IPC: F04B53/16 ,  F04B1/04

CPC classification number: C23C28/321 ,  C23C28/345 ,  F04B1/0404 ,  F04B53/162 ,  F05C2201/021 ,  F05C2201/903 ,  F05C2253/12 ,  Y10S428/936 ,  Y10T137/7036 ,  Y10T137/85978 ,  Y10T428/1275 ,  Y10T428/12944

Abstract: The invention relates to a fuel pump for an inter-cylinder direct fuel injection apparatus, in which occurrence of corrosion and attrition caused by cavitation or erosion can be suppressed, their resistance against the environment can be improved, and an excellent lifetime can be achieved in the case of the use of an aluminum material even if the temperature reaches as high as 100°C or higher and the pressure reaches as high as 7 to 12 MPa. In the fuel pump for an inter-cylinder direct fuel injection apparatus, made of aluminum or an aluminum alloy, a coating film ( 501) plated with Ni-P or a Ni-P based material is formed by electroless plating.

公开(公告)号：EP1310577B1

公开(公告)日：2004-11-24

申请号：EP02004241.2

申请日：2002-02-26

Applicant: Hitachi, Ltd.

Inventor： Yamaguchi, Shizuka ,  Baba, Noboru ,  Nagayama, Toshiaki ,  Terakado, Katsuyoshi ,  Kagiyama, Arata ,  Machimura, Hideki ,  Yamada, Hiroyuki ,  Takahashi, Yukio ,  Kotaki, Masayoshi ,  Ojima, Kazuo

IPC: C23C8/80 ,  C23C28/00 ,  F02M59/44 ,  F02M63/02 ,  F04B1/12 ,  F04B1/14 ,  F04B53/14

CPC classification number: C23C28/044 ,  C23C8/80 ,  C23C28/00 ,  C23C28/048 ,  F02M59/102 ,  F02M59/366 ,  F02M59/445 ,  F02M63/0225 ,  F02M2200/02 ,  F04B1/0408 ,  F04B1/0413 ,  F04B1/0421 ,  F04B1/0426 ,  F04B1/143 ,  F04B1/146 ,  F05C2253/12