发明名称 |
High-pressure fuel supply pump |
摘要 |
A high-pressure fuel supply pump which has no probability of discontinuity of a thin film of fuel at a sliding portion even when the fuel is not needed to be compressed to a high pressure is obtained. Two low-pressure fuel ports are provided on the high-pressure fuel supply pump in addition to a high-pressure discharge port to a high-pressure fuel capacity chamber. One of the two low-pressure fuel ports is connected to a low-pressure fuel capacity chamber and remaining one is connected to a low-pressure fuel supply pump. Accordingly, the interior of the high-pressure fuel supply pump is always filled with fresh fuel even in a mode in which a high-pressure fuel injecting valve does not inject fuel and only a low-pressure fuel injection valve injects fuel, so that a temperature rise of a plunger and a cylinder is prevented and locking of the plunger and the cylinder can be prevented. |
申请公布号 |
US9145860(B2) |
申请公布日期 |
2015.09.29 |
申请号 |
US201013578380 |
申请日期 |
2010.08.20 |
申请人 |
Hitachi Automotive Systems, Ltd. |
发明人 |
Usui Satoshi;Tahara Shigenori;Tokuo Kenichiro;Nemoto Masashi;Munakata Akihiro;Suganami Masayuki;Kawano Tatsuo |
分类号 |
F02M55/02;F02M59/46;F02M59/10;F02M59/36;F02M37/00;F02M55/04;F02M63/02;F02M63/00;F02M69/04 |
主分类号 |
F02M55/02 |
代理机构 |
Foley & Lardner LLP |
代理人 |
Foley & Lardner LLP |
主权项 |
1. A high-pressure fuel supply pump used in an internal combustion engine having high-pressure fuel injection apparatus (23, 24, 30) and low-pressure fuel injection apparatus (41, 43, 44), the apparatuses being supplied with fuel from a low-pressure fuel supply pump, wherein
low-pressure fuel flows to a low-pressure fuel channel of the low-pressure fuel injection apparatus via a low-pressure fuel channel provided in a body of the high-pressure fuel supply pump even while the high-pressure fuel supply pump is making a pause. |
地址 |
Hitachinaka-shi JP |