| US 7,513,240 B2 | ||
| High pressure fuel pump provided with damper | ||
| Satoshi Usui, Hitachinaka (Japan); Hiroshi Odakura, Hitachiota (Japan); Toru Onose, Ibaraki (Japan); Atsuji Saito, Hitachinaka (Japan); Masami Abe, Hitachi (Japan); and Hiroyuki Yamada, Hitachinaka (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan); and Hitachi Car Engineering Co., Ltd., Hitachinaka-shi (Japan) | ||
| Filed on Jan. 11, 2007, as Appl. No. 11/622,170. | ||
| Application 11/622170 is a continuation of application No. 10/274034, filed on Oct. 21, 2002, granted, now 7,165,534. | ||
| Claims priority of application No. 2002-057132 (JP), filed on Mar. 04, 2002. | ||
| Prior Publication US 2007/0107698 A1, May 17, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F02M 59/46 (2006.01) | ||
| U.S. Cl. 123—467 [123/446; 138/30] | 7 Claims |
| 1. A high-pressure fuel feed pump, comprising
a pump body;
a pressurizing chamber formed in said pump body;
an intake valve provided at an inlet of said pressurizing chamber;
a discharge valve provided at an outlet of said pressurizing chamber;
a plunger arranged to go into and out of said pressurizing chamber for pressuring a fuel in the pressuring chamber and discharging
the fuel through said discharge valve;
a low-pressure chamber formed in said pump body and separated from ambient by a metal housing fixed to said pump body;
a first low-pressure fuel passage for conducting a low-pressure fuel therethrough;
a second low-pressure fuel passage for conducting the low-pressure fuel from said low-pressure chamber to said intake valve;
and
a metal damper arranged in said low-pressure chamber and having two metal diaphragms bonded to a peripheral edge thereof;
wherein outer surfaces of said two metal diaphragms are each exposed to an internal of the low-pressure fuel flow from said
first low-pressure fuel passage to said intake valve.
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