FUEL INJECTION CONTROL DEVICE FOR INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To improve the driving efficiency by detecting a pushing force loaded on a plunger inside an injector driven by a cam moving in linkage with an engine revolution for enabling to control independently the fuel injection timing and the injection volume based on a change of pushing force and an engine loading. CONSTITUTION:A unit injector 24 is provided to be driven by a cam 22 moving in linkage with an engine revolution via a driving machanism 35 provided with a lifter 51 and a pressure detector 52. This detector 52 is formed to detect a pushing force with a piezo-electric element loaded on the plunger 26 of the injector 24 by the cam 22. A holder 25 of the injector 24 is provided with a control valve 36 and a fuel supply route 37b of this valve 36 is connected with the third control fuel passage 31c of the injector 24 and a fuel return route 37c is connected with the fourth return passage 43d respectively. This control valve 36 controls the driving for controlling the fuel injection timing and the injection volume based on the outputs of the above-said pressure detector 52 and a load detector (unillustrated).