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Fuel injection

Fuel injection


Fuel injection with the MOTRONIC 2.8.1 system is sequential, i.e. it follows the firing order of the engine.

Injection duration is determined by the control module on the basis of a number of parameters:


• engine load (mass air flow sensor)

• engine rpm (crankshaft sensor)

• engine temperature

• Oxygen sensors

• etc.

The V6 engine has two oxygen sensors, one for the front row of cylinders (2, 4 and 6) and one for the rear row of cylinders (1, 3 and 5). With the information from both oxygen sensors, the control module can regulate the injection duration separately for each individual cylinder.

The opening duration of the injectors varies from about 3 ms at idling speed to about 15 ms at full throttle.