Hochdruckkraftstoffzufuhrvorrichtung für eine Brennkraftmaschine

摘要

The high-pressure fuel supply device for an internal combustion engine for pressurizing fuel to a high pressure and supplying the pressurized fuel to the internal combustion engine. The device includes: a fuel pressure chamber defined by a cylinder and a plunger disposed in the cylinder so as to reciprocate in the cylinder; a fuel flow passage for pumping out fuel from a fuel tank with a pump and sending the pumped fuel to the fuel pressure chamber; a check valve disposed in the fuel flow passage for permitting flow of the fuel only to the fuel pressure chamber; a fuel supply passage associating the fuel pressure chamber with the internal combustion engine for pressing the fuel in the fuel pressure chamber pressurized by reciprocation of the plunger into the internal combustion engine; a fuel spill passage associating the fuel pressure chamber with the fuel tank; and a fuel spill valve disposed in the fuel spill passage for changing a spill amount of fuel to be returned to the fuel tank by opening and closing the fuel spill valve, so as to regulate an amount of fuel to be pressed to flow from the fuel pressure chamber to the internal combustion engine.