Computers and Control Systems: Description and Operation

Fig. 1 Engine control system operation:

Fig. 1 Feedback control system components.:

The engine control system controls solenoid valves in the feedback, idle-up, EEC, EGR, air injection and deceleration control systems. Main system components include various sensors, solenoid valves, an emission control unit and malfunction indicator lamp. The system features self-diagnostic capabilities, enabling automatic detection of malfunctions in system inputs and outputs as well as the emission control unit itself.