Fuel injection apparatus for internal combustion engine

A fuel injection apparatus for an internal combustion engine having a plurality of cylinders, including a fuel injection valve and an in-cylinder pressure sensor disposed in each of the plurality of cylinders, the fuel injection valve injecting fuel into a combustion chamber of each cylinder and the in-cylinder pressure sensor detecting a pressure in the combustion chamber, the fuel injection apparatus comprising:

• at least one cylinder pair actuating circuit provided corresponding to at least one 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 at least one cylinder pair;
• and
• noise suppressing means disposed between the at least one cylinder pair actuating circuit and the actuating solenoids,
• wherein the noise suppressing means includes two output terminals connected respectively to the two actuating solenoids of the two fuel injection valves, and grounding impedance reducing means for reducing a grounding impedance between one of the two output terminals and the ground,
• wherein when actuating one of the two injection valves, the grounding impedance reducing means reduces the grounding impedance between the output terminal connected to the actuating solenoid of the other of the two injection valves and the ground.