Throttle Valve - BMW N62B44 Manual

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:
S S t t a a r r t t i i n n g g t t h h e e e e n n g g i i n n e e
Airflow is controlled by the throttle valve during the starting procedure when the air temp-
erature is between 20 ºC and 60 ºC, .
If the engine is at operating temperature, it will be switched to non-throttle mode approx-
imately 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 characteris-
tics.
E E n n s s u u r r i i n n g g a a c c o o n n s s t t a a n n t t v v a a c c u u u u m m o o f f 5 5 0 0 m m b b a a r r i i n n t t h h e e i i n n t t a a k k e e m m a a n n i i f f o o l l d d
This vacuum is needed to exhaust the blow-by gases from the crankcase and the fuel
vapors from the activated charcoal filter.
T T h h e e b b a a c c k k u u p p f f u u n n c c t t i i o o n n
If the Valvetronic system should fail, the throttle valve implements conventional load con-
trol).
42-02-25
Throttle Valve
N62 Engine
7