Japan Electronic Control Systems Company, Limited

Unisia Jecs Corporation

Toshio Namba

Junichi Furuya

Masanobu Osaki

Akihiko Araki

Mitsuru Miyata

Hirokazu Simizu

Apparatus and a method for controlling fuel supply to engine

Secondary air is supplied to a position upstream of a catalyst disposed in an exhaust passage of an engine. An oxygen sensor is disposed between a secondary air supply portion of the exhaust passage and the catalyst. The supply amount of the secondary air is feedback controlled so that the oxygen concentration in the exhaust gas detected by the oxygen sensor approaches a target value corresponding to a theoretical air/fuel ratio. A second oxygen sensor for air/fuel ratio control is disposed upstream of the secondary air supply portion. Air/fuel ratio feedback control adjusts the air/fuel ratio of air entering the engine so that the oxygen concentration at the second oxygen sensor approaches the same target value as at the other oxygen sensor.

Method and system for controlling secondary air for internal combustion

An apparatus supplies assist air toward an injection nozzle of a fuel injection valve of an internal combustion engine, to atomize an injected fuel. The apparatus starts and stops supplying the assist air according to engine operating conditions while correcting ignition timing or an engine intake air quantity, to thereby suppress fluctuations in engine output.

Method of and an apparatus for controlling assist air in an internal

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Isesaki, Japan

Toshio Namba