Patent ID: 7201150

Claim:
An energy-saving high-pressure fuel supply control device for internal combustion engine comprising: a high-pressure fuel pump that has a plunger driven to reciprocate by a pump cam interlocked with an internal combustion engine, sucks low-pressure fuel via a flow rate control valve during a movement of the plunger from a top dead center toward a bottom dead center, pressurizes the sucked fuel during a movement of the plunger from the bottom dead center toward the top dead center, and supplies the high-pressure fuel provided by the pressurization, to a fuel rail; and an electronic control unit that performs energization control to the flow rate control valve, wherein at a time point that is logically determined from the time point of the bottom dead center and when the pressure of the high-pressure fuel rises to a pressure to hold closing of the flow rate control valve, the electronic control unit ends the energization of the flow rate control valve to restrain energization energy to the flow rate control valve, wherein the time point when the energization of the flow rate control valve is ended is deviated toward a lag side in advance by a time that causes deviation of the bottom dead center of the plunger toward the lag side from the original bottom dead center.