VALVE DEVICE AND ACCUMULATOR FUEL INJECTION DEVICE USING THE VALVE DEVICE

Japanese Patent JP3589323

B2

PROBLEM TO BE SOLVED: To provide a valve device which can control a flow rate with high precision and a fuel injection device using the valve device.
SOLUTION: A spherical member 43 which can shut off a high pressure introduction passage 52 and a valve seat chamber 25 is in contact with a conical recessed section 421 formed at an end on a high pressure side of a shaft member. The shaft member is opened for the conical recessed section 421 and is provided with a first communicating passage 422 which communicates with the low pressure side. The opening and the valve seat chamber 25 are shut off by a contact section between the spherical member 43 and the conical recessed section 421. When the spherical member 43 leaves a flat plate 51, high pressure fluid flows into the first communicating passage 422 through the valve seat chamber 25 and a second communicating passage 401 from the high pressure introduction passage 52. At this time, since pressure in the first communicating passage 422 is lower than pressure in the valve seat chamber 25, the spherical member 43 is sucked on a shaft member 44 side. Consequently, positional accuracy of the spherical member 43 is improved, and it is possible to control a flow rate with high precision because an area of opening between the flat plate 51 and the spherical member 43 is specified with high precision.

Masashi Eupou
Shuichi Matsumoto

JP27005495A

November 17, 2004

October 18, 1995

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株式会社デンソー

F02M47/00; F16K31/06; (IPC1-7): F16K31/06; F02M47/00

JP61029177U
JP62170465U
JP5133296A

Masaki Hattori

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