FUEL SUPPLY DEVICE AND FUEL SUPPLY METHOD

摘要

A fuel supply device is equipped with a linear actuator, a reciprocating pump which is provided with a pressurizing piston driven by the linear actuator and reciprocating in the axial direction and which draws in fuel when the pressurizing piston moves in a first direction in the axial direction and pressurizes and discharges the fuel when the pressurizing piston moves in a second direction in the axial direction, and a controller for controlling the driving of the linear actuator. The aforementioned controller, in accordance with the load of the aforementioned internal combustion engine, controls the linear actuator so as to adjust the supply amount of fuel discharged from a pressurizing cylinder by adjusting the ratio between the discharge time and the intake time of the fuel by the aforementioned reciprocating pump without altering the reciprocation time of the aforementioned pressurizing piston. The ratio between the discharge time and the intake time of the fuel is adjusted by adjusting, in accordance with the load of the internal combustion engine, the stroke length of the aforementioned pressurizing piston and the movement speed of the pressurizing piston in the aforementioned second direction.