Caravan V6-181 3.0L SOHC VIN 3 FI (1987)
Fuel Injector: Description and Operation
Fig. 7 Fuel injector
The fuel injector, Fig. 7, is a solenoid operated valve which is energized and controlled by the SMEC. When voltage is applied to the injector
solenoid, a spring loaded ball is lifted off its seat and fuel is sprayed into the combustion chamber through spray orifices. The spray orifices and injector
tip design cause the fuel to be sprayed in an even conical pattern prior to entering the intake air stream.
The amount of fuel delivered by the injector is determined by the amount of time that the injector solenoid is energized. The SMEC determines the
amount of fuel necessary to maintain ideal air/fuel mixtures based upon various sensor inputs. The SMEC then energizes the fuel injector for a sufficient
amount of time to deliver the necessary amount of fuel.