Digifant I

Auxiliary Air Regulator:

The Auxiliary Air Regulator is mounted on the intake manifold of the engine. In order to overcome the increased friction in the cold and to ensure smooth idling, the engine receives more air-fuel mixture during the warm-up phase due to the action of the Auxiliary Air Regulator. When open (engine cold), the Auxiliary Air Regulator lets additional air bypass the throttle valve to raise idle speed. Electrical current warms the heating element and causes the bimetallic strip to deflect gradually, closing the rotary valve and cutting off the additional air.