12 486 PL ENGINE P INTEGRATED ENGINE ELECTRONICS (MOTRONIC) With the refinement of the intervention and control possibilities provided by electronics, it was a logical step to combine both ignition and fuel injection in an integrated engine control. On the one hand this makes it possible to match these two processes even better. On the other hand electronics permit to an increasing extent the inclusion of sensors as measuring points in order to be able to record specific operating conditions of the engine. Thus each of this sensor can serve to optimise ignition and injection via fixed connection in the micro computer. As a result engine power output, fuel consumption and pollutant emissions can be improved. Smooth running and ride comfort also benefit from such a measure. The sensors transmitting information to engine electronics include - depending on the system variant, engine speed and referance mark sensor, hot film mass air flow sensor, phase sensor, coolant temparature sensor, sensor for camshaft positon, a knock sensor, etc. ELECTRONIC CONTROL UNIT (ECU) INJECTOR 1 POWER SUPPLY IGNITION SWITCH CAMSHAFT POSITION SENSOR (PHASE SENSOR) VEHICLE SPEED SENSOR ENGINE SPEED AND REF. MARK SENSOR HOT FILM MASS AIR FLOW SENSOR BATTERYVOLTAGE ENGINE COOLANTTEMPERATURE A/C SWITCH/ RELAY A/C COMPRESSOR CONTROL CODINGSIGNAL KNOCK SENSOR 1 KNOCK SENSOR 2 THROTTLE POSITION SENSOR LAMBDA SENSOR INJECTOR 2 INJECTOR 3 INJECTOR 4 IDLESPEEDACTUATOR CANISTER PURGE VALVE FUEL PUMP RELAY EGR VALVE IGNITION 1 IGNITION 2UMP RELAY IGNITION 3 IGNITION 4 A / C RELAY MALFUNCTIONING INDICATOR LAMP
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