Internal combustion engine with a bypass line skirting the load-control organ of the internal combustion engine

In an internal combustion engine of the type having an air supply line for supplying air to a combustion chamber, a load-regulating member disposed in said supply line, a bypass line extending in bypassing relationship to said load-regulating member from a position upstream of said load-regulating member to a position downstream thereof, and an auxiliary air valve disposed in said bypass line, said auxiliary air valve having a valving member connected to and movable with a membrane which is displaceable under action of the suction pressure in said air supply line, the improvement comprising:

• a valve line interconnecting said air supply line and one side of said membrane, a condition responsive valve means located in said valve line, sid condition responsive valve means being shiftable from a first position communicating said one side of the membrane with the atmosphere and a second position communicating said one side of the membrane with said air supply line, and means for shifting said condition responsive valve means between said first and second positions for opening said auxiliary air valve during starting of the engine and for closing the auxiliary air valve during a warm operating phase of the engine, wherein the means for shifting the condition responsive valve means acts in response to a predetermined time delay after starting of said engine.