High-pressure fuel pump control apparatus for an internal combustion engine

摘要

A control device for a high-pressure fuel pump (1) for an internal combustion engine; the high pressure fuel pump is comprised of :
a pressurizing member (2) being reciprocated by rotation of a pump driving cam (100) mounted on the internal combustion engine; a pressurized chamber (12) whose volume is varied by reciprocation of the pressurizing member to perform pump action by repeating a charging stroke and a discharging stroke; and
a solenoid valve (8) which is installed as a suction valve in a fuel charging passage (10) to the pressurized chamber such that a pump suction pressure generated in the pressurized chamber in the charging stroke is exerted on the solenoid valve in a valve opening direction, and that is closed at OFF state of an electric driving signal and opened at ON state of the electric driving signal, so that a discharging rate of the high-pressure fuel pump of variable discharge rate type is controlled by an opening and closing control of the solenoid valve.
The control apparatus is characterized in that an output as to the ON state of the electric driving signal for the solenoid is set to start on the way of the charging stroke of the high-pressure fuel pump.