Recirculating Air Flap Actuator, Position/Task/Design/Function

Recirculating Air Flap Actuator, Position/Task/Design/Function

ENGINE 111.943 /944 /973 /975




76 Recirculated air pipe
M16/7 Recirculated air flap actuator
a Recirculated air flap open (aspiration mode)
b Recirculated air flap closed (maximum boost pressure)

Position
At top part of air cleaner

Task
Operating recirculated air flap steplessly between 0 - 90� for boost pressure control

Design/function
The recirculating air flap actuator is operated by means of a PWM signal supplied by the engine control module.
- On/Off ratio 100 %: recirculating air flap closed
- On/Off ratio 11 - 99 %: boost pressure control in part load range
- On/Off ratio 10 %: recirculting air flap open