Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1994-07-20
1996-07-30
Gluck, Richard E.
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
417420, F04D 1302, B60H 132
Patent
active
055405673
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on an assembly or unit according to the generic part of the main claim. Such a unit, in which a moisture-tight separating wall is located between the coupling halves of the magnetic coupling, is already available commercially. As a result of this construction, no moisture can escape from the circuit. The purpose-oriented arrangement of the conveying unit in the region of the radiating heat of the internal combustion engine of a motor vehicle results in a very dry atmosphere in the space around the drive motor which, as is well known, contributes substantially to brush wear when so-called graphite or carbon brushes are used. It has been shown that a moisture content of the air in the region of the carbon brushes amounting to 3 grams per cubic meter to 25 grams per cubic meter, but especially 8 to 15 grams per cubic meter, creates optimal hygrometric conditions with respect to carbon brush wear.
ADVANTAGES OF THE INVENTION
The conveying unit according to the invention with the characterizing features of the main claim has the advantage over the known unit that the small amount of liquid entering the motor space through the separating wall from the circuit creates a favorable atmosphere of this kind because this liquid passes through the wall in the form of vapor.
Advantageous further developments and improvements of the conveying unit indicated in the main claim are made possible by the steps contained in the subclaims. In a particularly advantageous manner, the wall which is permeable to moisture is made of plastic.
DRAWING
An embodiment example of the invention is shown in the drawing and explained more fully in the following description. FIG. 1 shows a schematic view of a cooling and heating circuit of a motor vehicle having a booster pump or auxiliary pump which is driven by an electric motor and supports the heating circuit; FIG. 2 shows a longitudinal section through a subject conveying unit with auxiliary pump and electric drive motor; and FIG. 3 shows a vehicle provided with the subject conveying unit.
DESCRIPTION OF THE EMBODIMENT EXAMPLE
A cooling and heating circuit 9 of an internal combustion engine 10 of a motor vehicle shown in FIG. 1 has cooling means 12 connected to the internal combustion engine through lines via the cooling circuit 14. A water pump 16 driven by the internal combustion engine 10 and a thermostat valve 18 are arranged in the cooling circuit 14. During operation of the internal combustion engine 10, the water pump 16 conveys the liquid serving as heat carrier in the direction of arrow 20 through the cooling means 12, where the coolant water gives off a large portion of its heat so that it can again serve as coolant. When the internal combustion engine is still cold, the thermostat valve 18 ensures that the coolant circuit 14 at first remains limited to a small line circuit 22 until the coolant is heated to a suitable temperature. The thermostat valve 18 then opens and the coolant flows via the large coolant circuit 24 and is guided through the cooling means 18. A heating circuit 26 is associated with this coolant circuit 22 and 24. The heating circuit 26 leads through the passenger compartment 28 of the motor vehicle shown in FIG. 3 and flows through a heat exchanger 30. The heat exchanger 30 delivers heat to the passenger compartment 28. A conveying unit 32 containing a water pump 34 is provided for supporting the heating circuit 26. This conveying pump supports the flow of the heated coolant liquid arriving from the internal combustion engine 10 and presses it back through the heat exchanger 30 to the cooling circuit 22, 24 via a valve 36. Thus coolant liquid which is heated to the maximum temperature is guided to the heat exchanger 30 during operation of the internal combustion engine after the warm-up period and rapidly heats the passenger compartment 28 via the heat exchanger 30. In so doing, the auxiliary conveying unit 32 ensures a sufficient flow rate of heated liquid through the heat exchanger 30. When the passenger compartme
REFERENCES:
patent: 3225698 (1965-12-01), Spisiak
patent: 4854823 (1989-08-01), Hatting
patent: 4871301 (1989-10-01), Buse
patent: 5090944 (1992-02-01), Kyo et al.
Heier Christoph
Kiefer Klaus
Lentz Gerd
Schirpke Bernd
Gluck Richard E.
Robert & Bosch GmbH
Striker Michael J.
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