Gas fuel injector
AssigneeNikki Co., Ltd.
InventorsTsutomu Murakami, Shutaro Aizawa, Naokazu Kaneko
Life of this patent
Estimating the term…
Abstract
A gas fuel injector is provided, comprising a main body with an internal fuel passage, an opening/closing valve, and a solenoid for actuating the valve. The valve includes a shaft with a proximal end fixed to a solenoid plunger, a valve body at the distal end, and a valve seat member facing the valve body. The valve seat member includes a central valve hole, an annularly projecting peripheral wall, and an annular seat surface at the distal end of the wall. The valve body includes a sealing surface with a tapered, arched, or spherical shape that contacts the seat surface when the valve is closed.
Claims13
A gas fuel injector, comprising:
- a main body defining a fuel passage therein;
- an opening/closing valve disposed in the main body and configured to open and close the fuel passage;
- and
- a solenoid disposed within the main body and configured to drive the opening/closing valve to open upon energization,
- wherein the opening/closing valve comprises:
- a valve shaft having a proximal end fixed to a plunger of the solenoid;
- a valve body provided on a distal end of the valve shaft;
- and
- a valve seat member disposed in the main body and facing the valve body,
- wherein the valve seat member comprises:
- a valve hole extending through a center portion of the valve seat member;
- a peripheral wall projecting annularly to a predetermined height along an outer periphery of an opening of the valve hole;
- and
- a seat surface having an annular shape located at a distal end portion of the peripheral wall,
- wherein the valve body comprises:
- a sealing surface having a tapered, arched, or spherical shape configured to contact the seat surface when the opening/closing valve is in a closed position.
Dependencies are inferred from the claim text.