Circuit for an electrical ventilation reversing valve

摘要

In order to solve heating problems, known circuits switch the float chamber ventilation, for example as a function of the fuel feed pressure or of internal and external ventilation, generally with the engine at a standstill. These designs are unsatisfactory, however, since they do not solve the heat problem occurring whilst the engine is in operation. The new circuit is characterised in that the resulting signal when the carburettor is adjusted towards lean (throttling orifice in controlled limit position) is used for switching over the ventilation reversing valve. Circuits of the said type have applications in motor vehicle construction.