Throttle Valve

Throttle Valve




The throttle valve on the N62 is not necessary for engine load control. This is carried out by the intake valves variable lift adjustment.

- Throttle Valve Housing with Throttle Valve.
- Throttle Valve Actuator
- Two Throttle Valve Potentiometers

The tasks of the throttle valve are:

Starting the engine

Airflow is controlled by the throttle valve during the starting procedure when the air temperature is between 20 °C and 60 °C,.

If the engine is at operating temperature, it will be switched to non-throttle mode approximately 60 seconds after start up. In cold conditions however, the engine is started with the throttle valve fully opened because this has a positive effect on the starting characteristics.

Ensuring a constant vacuum of 50 mbar in the intake manifold

This vacuum is needed to exhaust the blow-by gases from the crankcase and the fuel vapors from the activated charcoal filter.

The backup function

If the Valvetronic system should fail, the throttle valve implements conventional load control).