Internal-combustion engines – Cooling – System drained and/or heat-storing
Patent
1998-07-15
2000-10-31
Kamen, Noah P.
Internal-combustion engines
Cooling
System drained and/or heat-storing
123 4146, 1231425E, F01P 1100
Patent
active
061386189
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a cooling water circulation system of an internal combustion engine, in particular of a motor vehicle, with a radiator, a pump, and a latent heat accumulator and/or an auxiliary heating device in the circulation system.
BACKGROUND
It is known to circulate the cooling water of an internal combustion engine by means of a pump that is located in the circulation system between the engine and the radiator and is driven by way of a V-belt or an electric motor. The radiator has a fan that is driven by the engine or by an electric motor. The devices required for cooling the engine must be individually attached as separate components and require a considerable amount of space in the engine compartment of a motor vehicle.
A thermostat valve is located in the cooling circulation system and is connected so that, after the startup of the internal combustion engine, the valve does not at first permit the cooling water to flow through the radiator until it is sufficiently warm. Thus the engine reaches the required operating temperature earlier.
It is furthermore known to dispose a latent heat accumulator in the cooling circulation system, which heat accumulator stores heat during the operation of the motor vehicle and retains this heat for a long time even after the motor vehicle is turned off. If the cold engine is started up, then the cooling water and the engine are immediately heated up by the latent heat accumulator, so that the emissions in a cold start are considerably reduced and the heating system is effective earlier. It is also known to locate an auxiliary heating device in the cooling circulation system, which device heats the engine and the passenger compartment before the startup.
The pump located in the cooling circulation system is not driven before the internal combustion engine is started up, so that the latent heat accumulator or the auxiliary heating device does not heat the water of the cooling circulation system. As a result, the engine only receives heated cooling water after it has been started up, so that at the beginning, it produces considerable emissions (in particular CO.sub.2).
SUMMARY OF THE INVENTION
An object of the invention is to improve the cooling water circulation system in an internal combustion engine so that even before the startup of the internal combustion engine, heat is supplied to the engine and in particular, the heating system. An object of the invention is also to achieve a compact construction.
This object is achieved according to the invention by virtue of the fact that the pump circulating the cooling water is a split sleeve motor pump, whose speed can be regulated in accordance with temperature measuring data of the latent heat accumulator or of the auxiliary heating device and/or of the internal combustion engine.
The pump located in the cooling circulation system can already set the cooling circulation system into action before the startup of the internal combustion engine and can thus transport the heat of the latent heat accumulator and/or the auxiliary heating device to the engine and to the heating system heat exchanger. This heats up the internal combustion engine before the startup, so that emissions are reduced and its service life is extended. Also, comfortable temperatures in the passenger compartment are reached sooner and window panes are defrosted and defogged before driving.
This is achieved at a low structural cost and with a high degree of durability. Small outer dimensions and a simple assembly are achieved if the split sleeve motor pump forms a single integral unit along with the radiator. In this connection, the split sleeve motor pump can be completely or partly located in the radiator, particularly in the return collector or advance collector of the radiator.
It is particularly simple in terms of construction if the radiator fan and the pump are driven by the same electric motor. It is also particularly advantageous if the regulation of the split sleeve motor pump takes the place of the thermo
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Huynh Hai
Kamen Noah P.
Wilo GmbH
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