Computerized Engine Controls: Notes

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Computerized engine control system monitors and controls engine operation. Input sensors supply information to an Powertrain Control Module (PCM). PCM processes information from input devices and sends output voltage signals to various control devices. See INPUT DEVICES and OUTPUT SIGNALS . Information received from input devices is processed by PCM to calculate proper fuel delivery, ignition timing, fuel pressure, fuel evaporative purge, exhaust gas recirculation and air injection.