Fuel supply apparatus for internal combustion engine

摘要

A fuel supply apparatus includes: a low-pressure fuel system applying pressure to a fuel in a fuel tank by using a first low-pressure pump and supplying the fuel to port fuel injection valves; a high-pressure fuel system applying pressure to the fuel in the fuel tank by using a second low-pressure pump, applying further pressure to the fuel by using a high-pressure pump driven by an internal combustion engine, and supplying the fuel to in-cylinder fuel injection valves; and an ECU controlling actuation of at least the first low-pressure pump and the second low-pressure pump in accordance with an operation state of the internal combustion engine. As the low-pressure fuel system and the high-pressure fuel system are independent of each other, pulsation generated from the high-pressure pump does not propagate to the port fuel injection valves.