Honda Motor Co., Ltd.

Kaoru Akiyama

Shusuke Akazaki

Shunichi Saito

A fuel injection apparatus for an internal combustion engine having a plurality of cylinders is provided. The fuel injection apparatus includes a fuel injection valve and an in-cylinder pressure sensor disposed for each of the plurality of cylinders. The fuel injection valve injects fuel into a combustion chamber of each cylinder and the in-cylinder pressure sensor detects a pressure in the combustion chamber. The fuel injection apparatus includes a cylinder pair actuating circuit and a noise suppressing circuit. The cylinder pair actuating circuit is provided corresponding to a cylinder pair which is a combination of two cylinders included in the plurality of cylinders, for supplying actuating current to two actuating solenoids of the two fuel injection valves mounted on the cylinder pair. The noise suppressing circuit is provided between the cylinder pair actuating circuit and the actuating solenoids. The noise suppressing circuit includes two output terminals connected respectively to the two actuating solenoids of the two fuel injection valves. When actuating one of the two injection valves, the grounding impedance between the output terminal connected to the actuating solenoid of the other of the two injection valves and the ground, is reduced.

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Tokyo, Japan

Kaoru Akiyama