Nippon Soken, Inc.

Kenji Iwamoto

Kouichi Moriguchi

Makoto Kuroyanagi

Ryuiti Matusiro

An internal combustion engine with an apparatus for controlling supercharging pressure. The engine includes at its exhaust pipe a by-pass conduit by-passing a turbine of the supercharger. A by-pass valve (so-called waste gate valve) is arranged in the by-pass conduit, which by-pass valve is connected to a diaphragm type actuator. The actuator has a diaphragm opened to the intake pipe at a position between the compressor of the supercharger and a throttle valve. A fixed orifice is arranged in the conduit. The conduit is at a position between the fixed orifice and the actuator connected to the atmosphere via variable orifice. The orifice is operated in accordance with the engine acceleration condition so that the pressure at which the by-pass valve is opened is increased when the engine is accelerating.

Turbocharged internal combustion engine with apparatus for controlling

An internal combustion engine with a supercharger, for use in a vehicle having an acceleration pedal. A throttle valve disposed in an intake system of the engine is interlocked with the acceleration pedal and is movable between an idle position when the acceleration pedal is in a non-load position and a full-open position when the acceleration pedal is in a predetermined intermediate-load position. The throttle valve is held in its full-open position when the acceleration pedal is between the predetermined intermediate-load position and a full-load position. A control device is interlocked with the acceleration pedal for controlling the operation of the supercharger so as to cause the same to perform its supercharging only when the acceleration pedal is between the predetermined intermediate-load position and the full-load position.

Growing community of inventors

Nishio, Japan

Kenji Iwamoto