GAS FUEL INJECTION VALVE

WIPO Patent Application WO/2010/016343

A1

A gas fuel injection valve wherein a valve housing (2) is provided with a nozzle member (3) having a flat valve seat (8) and a nozzle hole (10) penetrating through the center of the valve seat, and also with a magnetic circular tube body (4) joined to the nozzle member (3).  The nozzle member (3) consists of a synthetic resin, and on the outer periphery of the nozzle member (3) are formed a first fitting section (11) fitted in a fitting connecting hole (18) in a front end section of the magnetic circular tube body (4), a second fitting section (12) fitted in a mounting hole (1) in an air intake path member (P1) of an engine, and a connecting recess (13) located between both the fitting sections (11, 12).  A staking tube section (22) formed at the front end of the magnetic circular tube body (4) is staked to the connecting recess (13) side to join the magnetic circular tube body (4) and the nozzle member (3) together.  An annular seal groove (15) in which a seal (17) is mounted is formed in the outer periphery of the second fitting section (12), and the seal (17) makes close contact with the inner peripheral surface of the mounting hole (1) in the air intake path member (P1).  Thus, the seal groove in which the seal (17), which makes close contact with the inner peripheral surface of the mounting hole (1) in the air intake path member (P1), is mounted can be formed without using a special ring member.

TAKIGUCHI NAOTO (JP)

PCT/JP2009/061854

February 11, 2010

June 29, 2009

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KEIHIN CORP (JP)
TAKIGUCHI NAOTO (JP)

F02M21/02; F02M51/06; F02M69/04

WO2007088790A1

2007-08-09

JP2004518065A	2004-06-17
JP2006312883A	2006-11-16
JPS6043166A	1985-03-07
JP2007040245A	2007-02-15

See also references of EP 2314854A4

OCHIAI Takeshi et al. (JP)
Ochiai 健 (JP)

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