Aisan Kogyo Kabushiki Kaisha

Hideki Ito

Toshiro Makimura

Hiroshi Kawazoe

Seiji Ii

Hitoshi Takeuchi

Takaaki Takagi

Motohiro Baba

A fuel injection port formed in a seat is opened and closed by a movable valve supported by a flat spring . The movable valve is biased by an elastic force of a coil spring in a direction that closes the fuel injection port . When electric power is supplied to a solenoid coil , the movable valve is moved to a direction that opens the fuel injection port as a result of an electromagnetic attraction force between a magnetic circuit M for generating an electromagnetic attraction force and the movable valve . Air gaps G , G and G are formed within the fuel injection port and permeance ratios between the air gaps may be set to optimal valves.

Electromagnetic fuel injection valve

A fuel injection port formed in a seat is opened and closed by a movable valve supported by a flat spring The movable valve is biased by an elastic force of a coil spring in a direction that closes the fuel injection port When electric power is supplied to a solenoid coil the movable valve is moved to a direction that opens the fuel injection port as a result of an electromagnetic attraction force between a magnetic circuit M for generating an electromagnetic attraction force and the movable valve Air gaps G G and G are formed within the fuel injection port and permeance ratios between the air gaps may be set to optimal values.

An electromagnetic fuel injector comprising a fixed iron core, a solenoid formed by winding a coil around the fixed iron core, a coil holder fixed to the solenoid, an injector casing surrounding the solenoid and the coil holder and formed of a material having high magnetic permeability, a movable iron core inserted between the fixed iron core and the injector casing, a compression spring normally biasing the movable iron core toward an injection nozzle of the injector, a valve body connected at its base to the movable iron core and formed with a flange at a base portion thereof, a stopper adapted to abut against the flange of the valve body and restrict a movable range, a valve housing incorporated in a front portion of the injector casing and slidably supporting the valve body, the valve housing being formed at its front end portion with a valve seat adapted to abut against the valve body, and a radiation member closely fitted on an outer periphery of the injector casing. A connection member may be provided connecting a plurality of injectors mounted on cylinders in a multi-cylinder engine for radiating heat generated in the injectors.

Growing community of inventors

Obu, Japan

Hideki Ito