Electronic Engine Management
The electronic engine management's main job is to co-ordinate all the different processes to ensure the engine is working as efficiently as it should. These processes include the ignition timing, amount of fuel injected, duration of injection and exhaust gas recirculation, as well as the throttle valve setting, variable intake manifold position, variable turbine geometry (on turbocharged engines) and the camshaft adjustment (on petrol engines). In order to perform these tasks, the system also monitors the engine speed, engine temperature, fuel grade (by means of a knock sensor) and accelerator pedal position. The details of any deviations from normal operation are stored in the fault memory so the causes can be investigated the next time your car is serviced.