SAFARI

486 PL ENGINE

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 2

UMP RELAY

IGNITION 3

IGNITION 4

A / C RELAY

MALFUNCTIONING INDICATOR LAMP