Honda Giken Kogyo Kabushiki Kaisha

Katsuichi Shiroyama

Urataro Asaka

Toru Hatanaka

A three-valve prechamber internal combustion engine is provided with a conduit through which atmospheric air may be drawn into the intake passage leading to the prechamber. A solenoid valve in the conduit is opened during deceleration of the engine to lean-out any over-rich mixture and to remove any fuel droplets clinging to the walls of the auxiliary intake passage, thus preventing the temporary formation of an over-rich mixture which is not ignited by the spark plug. Such an over-rich mixture when exhausted into the exhaust passage contacts the hot portions thereof to be explosively ignited to produce the undesirable afterburning phenomenon.

Growing community of inventors

Shiki, Japan

Katsuichi Shiroyama