![]() ![]() High current drivers used to control the fuel injector solenoids and coil primary current are optically isolated from the computer by the use of fiber optic cables. A prototype card installed in the computer contains counters and discrete logic which control the timing of ignition and injection events. Inputs required for the system include manifold absolute pressure, manifold air temperature, a once per revolution crankshaft pulse, a once per cycle camshaft pulse, and a relative encoder pulse train to determine crank angle. A system was designed for controlling fuel injection and ignition timing for use on a port fuel injected, gas-fueled engine.
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