Patent EP0147740A2 successfully refreshed from Google Patents.
EP0147740A2
Expired / Lapsed
EP
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Vacuum-boosting device
Assignee: Corint SRL
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Filing: 1984-12-13
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Granted: —
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Expires: 2004-12-13
Abstract
Abstract 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.
Inventors
- 👤 Ettore Cordiano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 21:40
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/02; F02M; F02M7/00; F02M3/00; F02M3/06; F02M3/062; F02B; F02B3/00; F02B3/06; F02D2009/0201; F02D2009/024
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
250 words
A device for rapidly boosting the vacuum produced at idling by an engine for motor vehicles provided with vacuum-operated load systems (15), the vacuum being provided by the induction of the engine in the case of a petrol engine,or by a suitable vacuum pump (34) in the case of a diesel engine, of the type including a vacuum actuator (16; 25) acting upon a throttle valve (19) in the induction duct system (18) of the engine and, in the case of a petrol engine, comprising the throttle valve of the carburettor or of the injection system, characterised in that: the vacuum actuator (16; 25) is actuated by the vacuum existing in the pneumatic circuit of the load system (15) and controls the throttle valve (19) in such a way that, when said vacuum is weaker than a given predetermined value, the actuator (16; 25) in the case of a petrol engine, opens the throttle valve slightly for the purpose of slightly increasing the engine idling revolutions, or in the case of a diesel engine, the actuator (16; 25) ensures that the valve throttles the air flow in the supply system in order to create in the said supply system a vacuum that assists the vacuum pump (34) to exhaust air from the load system (15), the actuator (16; 25) returning the engine, be this a petrol engine or a diesel engine, to its normal operating condition once the vacuum in the load system (15) has reached the said predetermined value.
Claim 2
Independent Claim
250 words
A device for rapidly boosting the vacuum produced at idling by an engine for motor vehicles provided with vacuum-operated load systems (15), the vacuum being provided by the induction of the engine in the case of a petrol engine,or by a suitable vacuum pump (34) in the case of a diesel engine, of the type including a vacuum actuator (16; 25) acting upon a throttle valve (19) in the induction duct system (18) of the engine and, in the case of a petrol engine, comprising the throttle valve of the carburettor or of the injection system, characterised in that: the vacuum actuator (16; 25) is actuated by the vacuum existing in the pneumatic circuit of the load system (15) and controls the throttle valve (19) in such a way that, when said vacuum is weaker than a given predetermined value, the actuator (16; 25) in the case of a petrol engine, opens the throttle valve slightly for the purpose of slightly increasing the engine idling revolutions, or in the case of a diesel engine, the actuator (16; 25) ensures that the valve throttles the air flow in the supply system in order to create in the said supply system a vacuum that assists the vacuum pump (34) to exhaust air from the load system (15), the actuator (16; 25) returning the engine, be this a petrol engine or a diesel engine, to its normal operating condition once the vacuum in the load system (15) has reached the said predetermined value.
Claim 3
Dependent Claim
159 words
A device for rapidly boosting the vacuum produced by an idling engine according to Claim 1, in particular for a petrol engine in which the vacuum is provided by the induction manifold, characterised in that the device includes a vacuum actuator (16) which acts upon an idling stop (4) for the throttle valve of the carburettor - or of the injection system - in such a way as to increase the engine idling revolutions when the vacuum weakens and falls below the predetermined value, the actuator (16) being connected to the circuit of the load system (15) so that the force exerted by the actuator on the throttle valve stop (4) depends on the vacuum in the said circuit, and elastic means (12) for biassing the throttle valve stop (4) to a high idling position, the vacuum actuator (16) returning the stop into a normal idling position when the vacuum in the load system (15) reaches the predetermined value.
Claim 4
Dependent Claim
119 words
A device for rapidly boosting the vacuum produced by an idling engine according to Claim 1, in particular for a diesel engine, in which the vacuum is provided by a vacuum pump (34) driven by the engine characterised in that a throttle valve (19) preferably of the butterfly type, is provided in the induction duct system (18) and is controlled by the vacuum actuator (25), said actuator (25) being biassed by suitable elastic means (31) to a position in which the valve (19) allows the free passage of air, and the actuator acting so as to bring the valve into an air flow restricting position when the vacuum in the load system (15) is lower than the predetermined value.
Claim 5
Dependent Claim
60 words
A device for rapidly boosting the vacuum produced by an idling engine according to Claims 1 and 3, only for diesel engines, characterised in that in addition to the throttle valve (19) the subject-of Claim 3, there is also used the high idling device according to Claim 2, said high idling device acting upon the injection system of the engine.
References Cited (Backward Citations)
No citation records indexed.
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