Patent ID: 7284539

Claim:
A fuel pressure controller of a direct injection internal combustion engine that pressurizes fuel and supplies the fuel to an injector with a high-pressure pump and that injects the fuel directly into a cylinder of the engine through the injector, the fuel pressure controller comprising: a fuel pressure sensing device that senses fuel pressure supplied from the high-pressure pump to the injector; a target fuel pressure setting device that sets target fuel pressure in accordance with an operation state of the engine; and a fuel pressure control device that controls a discharge amount of the high-pressure pump by F/F-F/B combination control using feedforward control and feedback control to conform the fuel pressure sensed by the fuel pressure sensing device to the target fuel pressure, wherein the fuel pressure control device performs F/B single control for controlling the discharge amount of the high-pressure pump through only the feedback control without using the feedforward control when an operation state of the engine is an idling condition.