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CAC Gasoline Engine Maintenance And Servicing Manual 83 IWM523 fuel injector applied in the system is of the shortened type of the first generation. It is entirely made of stainless steel and superior in the function. The advantage may be embodied when the commercial Technical parameters: -winding resistance when fuel injector is not operating, it is sealed and doesn’t allow fuel drain. Fuel needed by engine, is controlled by ECU(supplied electricity by relay (87))directly. And ECU decides the open time of each intake Fuel injection time is controlled by the following measures: controlled by time and not related to TDC signal. ECU has a basic current control circuit to control fuel injector. The circuit produces the maximal current(signal) at the first control order speed up the opening of injector. Once maximum current is attained , Injection duration is showed on the 2-dimension figure as a function of engine speed and intake manifold absolute pressure . After engine warming up or speed turns to be stable, injection duration is 1~4mS. Injection duration is increasing basically under special operation condition, such as accelerating, cold starting, engine warming up. As accelerator pedal is released, fuel will be cut off.( ti=0mS). Running condition ——intake air temperature sensor “ATS05” are installed in the plastic setting molding case. Sensor resistance will changed with intake air temperature.
Fig. 138 fuel injector +12V relay ECU 18 insert pin |