Crowell & Moring LLP
Fuel pump and direct fuel injection engine
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.
Hitachi, Ltd.
F F C F C F F F C F F F F C F F
F02M F04B C23C F04B C23C F04B F02M F04B C23C F04B F02M F02M F05C C23C F04B F02M
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Kazuo Toshiaki Masayoshi Hiroyuki Arata Shizuka Yukio Hideki Katsuyoshi Noboru
Ojima Nagayama Kotaki Yamada Kagiyama Yamaguchi Takahashi Machimura Terakado Baba