INJECTION TIME MEASURING APPARATUS IN PEAK AND HOLD INJECTION

摘要

PURPOSE: A device for measuring the injection time of peak and holder injectors is provided to controls injectors by computing the exact injection time according to engine load of a vehicle. CONSTITUTION: A device for measuring the injection time of peak and holder injectors comprises resistors, an injector selection switch, relays and integrators. The resistors detect peak voltage and hold voltage per one cycle which are supplied to the peak and holder injectors. A user drives the peak and holder injectors or a saturation injector through a main controller or a sub controller using an injector selection switch. The relays make a closed contact point switch off, driven by the output signals of sub controller when the user tries to drive the peak and holder injectors or the saturation injector. The integrators integrate the peak voltage and the holder voltage of the peak and holder injectors per one cycle and convert it into the drive voltage.