carburetor for depression continued with the dosing needle controlled by a capsule membrane

摘要

In a carburettor, the dosing needle for regulating the fuel flow is connected to a second movable element, such as a membrane or piston, the second movable element being movable relative to a first movable element, one side of the second movable element being subject to atmospheric pressure and the other side of the second movable element being subject to the partial vacuum prevailing upstream of the throttle valve, modulated by an electromagnetic valve capable of supplying atmospheric pressure, the electromagnetic valve being controlled by a probe arranged in the exhaust pipe which supplies a signal representative of the composition of the exhaust gases.