| 摘要 |
PROBLEM TO BE SOLVED: To perform fine control, specially highly precise control of injection quantity at high temperature, in a compact electronically controlled fuel injection system. SOLUTION: The electronically controlled fuel injection system consists of a plunger pump 800, a reflux passage 140 for refluxing fuel pressurized in an initial region of a force-feed stroke, a valve element 820 for shutting the reflux passage in a latter region of the force-feed stroke, an inlet orifice nozzle 60 for making the fuel pressurized in the latter region of the force-feed stroke pass, an outlet orifice nozzle 70 for refluxing a part of the fuel passing through the inlet orifice nozzle, an injection nozzle 1000 for injecting the fuel corresponding to a difference between the fuel passing through the inlet orifice nozzle and the fuel passing through the outlet orifice nozzle, and control means 80, 90 for controlling the plunger pump so as to move in response to an engine cycle. |
