The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2005
Filed:
Feb. 28, 2002
Shizuka Yamaguchi, Hitachinaka, JP;
Noboru Baba, Hitachiota, JP;
Toshiaki Nagayama, Urizura, JP;
Katsuyoshi Terakado, Urizura, JP;
Arata Kagiyama, Naka, JP;
Hideki Machimura, Tokai, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Yukio Takahashi, Hitachinaka, JP;
Masayoshi Kotaki, Hitachinaka, JP;
Kazuo Ojima, Hitachinaka, JP;
Shizuka Yamaguchi, Hitachinaka, JP;
Noboru Baba, Hitachiota, JP;
Toshiaki Nagayama, Urizura, JP;
Katsuyoshi Terakado, Urizura, JP;
Arata Kagiyama, Naka, JP;
Hideki Machimura, Tokai, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Yukio Takahashi, Hitachinaka, JP;
Masayoshi Kotaki, Hitachinaka, JP;
Kazuo Ojima, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel pump, of which sliding mechanism parts in its fuel chamber have good wear resistance under a severe environment, and a direct fuel injection engine using the fuel pump are provided. 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, a slipper and a plunger sliding in a lubricating oil and at least one of sliding surfaces of sliding members of a plunger and a cylinder 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.