| 摘要 |
PURPOSE:To make a low cost obtainable with structure simplified by cutting off communication between the first and second pressure chambers, when a shifting means is shifted in the axial direction synchronously with an internal combustion engine to close a communication path, so as to start fuel injection when the shifting means is further shifted to increase an internal pressure in the first pressure chamber to not less than the predetermined. CONSTITUTION:A press feed plunger 51 is driven from the top dead center to the bottom dead center by a cam synchronized with an engine, when the plunger 51 is shifted to the lower by a press stroke L, a spill passage 504 is closed by a side surface of the plunger 51. Consequently, communication between the inside of a pump chamber 52 and the inside of a spill chamber 54 is cut off, when the plunger 51 is further shifted to the lower, fuel in the pump chamber 52 is compressed in accordance with a shifting amount. Consequently, an internal pressure in the pump chamber 52 is increased in accordance with shifting the plunger 51, and fuel in the pump chamber 52 or the like is pressurized in proportion to a displacement amount of the plunger 51. A pressure of fuel in the pump chamber 52 or the like is increased by further shifting the plunger 51, when the internal pressure in the pump chamber 52 is increased to not less than the opening pressure of a nozzle 3, fuel injection is started from a jet hole 38. |
