ELECTROMAGNETIC FUEL INJECTION VALVE AND METHOD OF MANUFACTURING THE SAME

WIPO Patent Application WO/2005/083261

A1

An electromagnetic fuel injection valve, wherein the front end of a non-magnetic cylindrical body surrounding a part of a movable core with a rear end surface used as a movable side attraction acting surface is coaxially joined to the rear end of a magnetic cylindrical body forming a part of a valve housing, and the front part of a fixed core with a front end surface used as a fixed side attraction acting surface is fixedly fitted to the rear part of the non-magnetic cylindrical body so as to oppose the fixed side attraction acting surface to the movable side attraction acting surface. The front part of the fixed core (22) is fixedly fitted to the non-magnetic cylindrical body (26) so as to fit closely to the intermediate part inner surface of the non-magnetic cylindrical body (26) at its portion corresponding to the fixed side attraction acting surface (42), and an annular recessed part (44) having a flat surface part (44a) continued flush with the fixed side attraction acting surface (42) is formed on the inner surface side of the non-magnetic cylindrical body (26) so that an annular chamber (45) can be formed in the clearance thereof from the rear part outer peripheral surface of the movable core (18). Thus, since the areas of the opposed surfaces of the fixed core and the movable core can be set maximally, chips and magnetic particles can be prevented from being deposited and adhered.

AKABANE AKIRA (JP)

PCT/JP2005/003129

September 09, 2005

February 25, 2005

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KEIHIN CORP (JP)
AKABANE AKIRA (JP)

F02M61/16; F02M51/06; (IPC1-7): F02M51/06

JPH07279794A	1995-10-27
JPH07189852A	1995-07-28

See also references of EP 1719906A4

Ochiai, Takeshi (6-3 Taito 2-chome, Taito-k, Tokyo 16, JP)

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