Idle Speed Control

OPERATION
The idle speed is kept constant by an idle speed actuator which supplies the engine with the necessary amount of air. The control is effective as soon as the Digital Motor Electronic (DME) control unit detects the idle speed setting by way of throttle switch or the throttle potentiometer. The preprogrammed engine speed values in the DME control unit are compared with the actual value and corrected. In this way, deviations in engine speed due to mechanical-wear, leakages or different frictional resistances offered by the engine compensated. Adjustment of the idle speed is therefore rendered unnecessary.


Vehicles with Air Conditioner System
On models equipped with an air conditioning system, the idle speed is increased after the system detects that the air conditioner has been switched on. After detecting the A/C compressor signals, the air required at idle speed is corrected to the optimum value.