(57) A vacuum-boosting device for motor vehicles fitted with vacuum-operated load systems,
the vacuum being provided by the engine air induction in the case of a petrol engine
or by a suitable vacuum pump (34) in a Diesel engine. The device acts to increase
the rate of evacuation of the load system (15) when the vacuum of the engine is weaker
than a predetermined value, by increasing the idling revolutions of a petrol engine,
or acting on a throttle valve (19) in the air inlet (18) of a Diesel engine so as
to create a vacuum in the induction manifold to assist the vacuum pump (34) in evacuating
the load circuit.
|
|
