Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Powertrain Management > Computers and Control Systems > Electronic Throttle Actuator > Component Information > Locations > Page 2983
Electronic Throttle Actuator: Description and Operation
Electronic Engine Power Control
For EPC, the throttle valve is not operated by a cable from the accelerator pedal. There is no mechanical connection between the accelerator pedal and
The position of the accelerator pedal is communicated to engine control module (ECM) by the throttle position sensor / accelerator pedal position
The accelerator pedal position (driver's intention) is a main input unit for the ECM.
Operation of the throttle valve occurs via an electric motor, the throttle drive for in the throttle valve control module. This is true across the entire
The throttle valve is operated by the EPC according to specifications of engine control module (ECM).
With engine off and ignition switched on, the ECM controls the throttle drive according to specifications of throttle position sensor / accelerator pedal
With engine running under load, ECM can open or close the throttle valve independently of the throttle position sensor / accelerator pedal position
This means, for example, that the throttle valve could be fully opened even though the accelerator pedal has only been pressed half way. This has the
In addition, it results in a significant reduction in emissions and fuel consumption under certain load conditions.
It would be incorrect to think that EPC consists of only one or two components. EPC is much more of a system containing all components that
|[PREV PAGE] [NEXT PAGE]|