FUEL INJECTION DEVICE

WIPO Patent Application WO/2011/122051

A1

A fuel injection device (100) is provided with a control body (40) in which a nozzle hole (44) is formed, a nozzle needle (60) which opens and closes the nozzle hole (44), a pressure control chamber (53) which controls the movement of the nozzle needle (60), an inlet passage (52) which introduces high-pressure fuel into the pressure control chamber (53), an outlet passage (54) which causes fuel within the pressure control chamber (53) to flow out thereof, and a floating plate (70) which opens and closes the inlet passage (52). In the fuel injection device (100), the control body (40) has a cylinder (56) for defining the pressure control chamber (53) in the radial direction. The inner wall section (56a) of the cylinder (56) has formed therein a communication groove (57a) for connecting an inlet space (53a) in the pressure control chamber (53), the inlet space (53a) being located on the side of the floating plate (70) which faces the inlet passage (52), and a back pressure space (53b) in the pressure control chamber (53), the back pressure space (53b) being located on the side of the floating plate (70) which faces the nozzle needle (60).

YAMADA MASATO (JP)
KOBANE YOICHI (JP)
ADACHI NAOFUMI (JP)
YAMASHITA TUKASA (JP)

PCT/JP2011/001970

October 06, 2011

March 31, 2011

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DENSO CORP (JP)
YAMADA MASATO (JP)
KOBANE YOICHI (JP)
ADACHI NAOFUMI (JP)
YAMASHITA TUKASA (JP)

F02M47/00; F02M51/06

EP1656498B1	2008-11-26
JP2008175155A	2008-07-31
JPH08232812A	1996-09-10
JP2009250074A	2009-10-29
JP2009528480A	2009-08-06

KIN, Junhi (JP)
Gold Junki (JP)

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