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AssigneesIng. Enea Mattei S.P.A., Meccanotecnica Umbra S.p.A., Sei - Servizi Per L'economia E Per L'ingegneria Srl
InventorsGiulio Contaldi, Alessandro Ventura, Cinzia Cipollone
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A hydraulic circuit associated with an internal combustion engine comprising a main cooling circuit of the engine provided with a circulation pump for a cooling fluid, and an auxiliary preheating circuit branched from the main circuit; the pump is a rotary volumetric pump dimensioned so as to generate, at least during a warm-up transient of the engine, a flow rate greater than that required for the cooling of the engine; at least one fraction of the flow rate generated by the pump is sent to the auxiliary circuit where it recovers heat from a fluid at higher temperature, such as the exhaust gases and/or the supercharging compressed air of the engine, and gives it to a fluid at lower temperature, such as for example the engine oil or the passenger compartment air.
A hydraulic circuit (1) associated with an internal combustion engine (M) and comprising a main cooling circuit (2) of the engine (M) provided with a circulation pump (4) for a cooling fluid, characterized in that the pump (4) is a rotary volumetric pump driven by the engine (M) with a fixed transmission ratio and generating, at least during a warm-up transient of the engine (M), a flow rate greater than that required for the cooling of the engine (M) and by comprising an auxiliary circuit (3) branched from the main circuit and selectively connectable thereto by valve means (20), said valve means (20) being configured for sending to said auxiliary circuit (3), at least during said warm-up transient of the engine (M), at least a fraction of the flow rate of the cooling fluid pumped by the pump (4), said auxiliary circuit (3) comprising at least a first heat exchanger (21) wherein the cooling fluid absorbs thermal energy from a first fluid (23;
A method of controlling a hydraulic circuit (1) associated with an internal combustion engine (M), characterized in that it comprises, during the step of warming up the engine, the steps of:
Dependencies are inferred from the claim text.