US5960872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for stabilizing the temperature of the transmission oil of a motor vehicle
Assignee: Bayerische Motoren Werke AG
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Filing: 1997-02-03
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Granted: 1999-10-05
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Expires: 2017-02-03
Abstract
Abstract In order to control the temperature of the transmission oil of a motor vehicle driven by a liquid-cooled engine, a coolant/transmission oil heat exchanger is provided. The coolant stream supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant in order to achieve a desired temperature. Preferably the thermostatic valve is controlled by the temperature of the transmission oil, but it is also possible to have two expanding material elements as control pistons of the thermostatic valve, with one control piston being provided in the oil chamber of the thermostatic valve and the other control piston being provided in the coolant mixing chamber of the thermostatic valve. It is also possible, for purposes of precontrol, to electrically heat at least one of the control pistons.
Inventors
- 👤 Gerhart Huemer
- 👤 Heinz Lemberger
- 👤 Winfrid Eckerskorn
- 👤 Christian Absmeier
- 👤 Axel Temmesfeld
- 👤 Victor Brost
- 👤 Karl Schuetterle
- 👤 Klaus Kalbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:31
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F01; F01M; F01M5/00; F01M5/005; F01M5/007; F16H57/0413; F01P; F01P2060/00; F01P2060/04; F01P2060/045; Y; Y10; Y10S; Y10S165/00; Y10S165/916
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
A device for controlling temperature of a transmission oil of a motor vehicle having a liquid-cooled vehicle engine and a radiator in which coolant of the liquid-cooled vehicle engine is recoolable, the device comprising: a heat exchanger through which the coolant is conducted as a function of temperature, said heat exchanger also being traversed by the transmission oil; wherein the coolant supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant; and wherein the thermostatic valve is controlled via temperatures of an essentially mixed coolant stream and wherein the thermostatic valve is displaceable to close-off both the recooled and non-recooled coolant flows.
Claim 2
Independent Claim
108 words
A device for controlling temperature of a transmission oil of a motor vehicle having a liquid-cooled vehicle engine and a radiator in which coolant of the liquid-cooled vehicle engine is recoolable, the device comprising: a heat exchanger through which the coolant is conducted as a function of temperature, said heat exchanger also being traversed by the transmission oil; wherein the coolant supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant; and wherein the thermostatic valve is controlled via temperatures of an essentially mixed coolant stream and wherein the thermostatic valve is displaceable to close-off both the recooled and non-recooled coolant flows.
Claim 3
Dependent Claim
19 words
The device according to claim 1, wherein said thermostatic valve is controlled via the temperature of the transmission oil.
Claim 4
Dependent Claim
46 words
The device according to claim 1, wherein said thermostatic valve comprises at least one control piston formed as an expanding material element, said expanding material element carrying valve plates for changing inflow cross sections of a mixing chamber in a thermostat housing of said thermostatic valve.
Claim 5
Dependent Claim
46 words
The device according to claim 2, wherein said thermostatic valve comprises at least one control piston formed as an expanding material element, said expanding material element carrying valve plates for changing inflow cross sections of a mixing chamber in a thermostat housing of said thermostatic valve.
Claim 6
Dependent Claim
54 words
The device according to claim 3, wherein one control piston is provided both in the mixing chamber and in an oil chamber, which is traversed by the transmission oil, of the thermostat housing, and wherein the one control piston provided in the mixing chamber abuts the one control piston provided in the oil chamber.
Claim 7
Dependent Claim
54 words
The device according to claim 4, wherein one control piston is provided both in the mixing chamber and in an oil chamber, which is traversed by the transmission oil, of the thermostat housing, and wherein the one control piston provided in the mixing chamber abuts the one control piston provided in the oil chamber.
Claim 8
Independent Claim
195 words
A device for controlling temperature of a transmission oil of a motor vehicle having a liquid-cooled vehicle engine and a radiator in which coolant of the liquid-cooled vehicle engine is recoolable, the device comprising: a heat exchanger through which the coolant is conducted as a function of temperature, said heat exchanger also being traversed by the transmission oil; wherein the coolant supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant; wherein said thermostatic valve comprises at least one control piston formed as an expanding material element, said expanding material element carrying valve plates for changing inflow cross sections of a mixing chamber in a thermostat housing of said thermostatic valve; wherein the thermostatic valve is controlled via temperatures of an essentially mixed coolant stream; and wherein one control piston is provided both in the mixing chamber and in an oil chamber, which is traversed by the transmission oil, of the thermostat housing, and wherein the one control piston provided in the mixing chamber has a free end abutting the one control piston provided in the oil chamber, the free end allowing the pistons to separate from one another.
Claim 9
Independent Claim
195 words
A device for controlling temperature of a transmission oil of a motor vehicle having a liquid-cooled vehicle engine and a radiator in which coolant of the liquid-cooled vehicle engine is recoolable, the device comprising: a heat exchanger through which the coolant is conducted as a function of temperature, said heat exchanger also being traversed by the transmission oil; wherein the coolant supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant; wherein said thermostatic valve comprises at least one control piston formed as an expanding material element, said expanding material element carrying valve plates for changing inflow cross sections of a mixing chamber in a thermostat housing of said thermostatic valve; wherein the thermostatic valve is controlled via temperatures of an essentially mixed coolant stream; and wherein one control piston is provided both in the mixing chamber and in an oil chamber, which is traversed by the transmission oil, of the thermostat housing, and wherein the one control piston provided in the mixing chamber has a free end abutting the one control piston provided in the oil chamber, the free end allowing the pistons to separate from one another.
Claim 10
Dependent Claim
16 words
The device according to claim 3, wherein said at least one control piston is electrically heatable.
Claim 11
Dependent Claim
16 words
The device according to claim 4, wherein said at least one control piston is electrically heatable.
Claim 12
Dependent Claim
16 words
The device according to claim 5, wherein said at least one control piston is electrically heatable.
Claim 13
Dependent Claim
16 words
The device according to claim 6, wherein said at least one control piston is electrically heatable.
Claim 14
Dependent Claim
16 words
The device according to claim 7, wherein said at least one control piston is electrically heatable.
References Cited (Backward Citations)
US1131444A
Cited
US1710278A
Cited
US1748369A
Cited
US2070092A
Cited
US1918471A
Cited
US1881771A
Cited
US1907033A
Cited
US2013708A
Cited
US2141926A
Cited
US2175432A
Cited
US2291607A
Cited
US2261418A
Cited
US2336840A
Cited
US2474518A
Cited
US2756026A
Cited
US2844319A
Cited
US3595306A
Cited
US3727712A
Cited
DE2250335A1
Cited
US3812872A
Cited
US3819113A
Cited
US4007780A
Cited
US4150786A
Cited
DE3201443A1
Cited
DE3403435A1
Cited
DE3527020A1
Cited
US4705100A
Cited
DE3705232A1
Cited
EP0467130A1
Cited
DE4032701A1
Cited
US5244036A
Cited
DE4035179A1
Cited
DE4211588A1
Cited
DE4304743A1
Cited
DE4431351A1
Cited
EP0736703A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-04 | 2003-04-05 | 2003-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-04 | 2007-04-05 | 2007-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-04 | 2011-04-05 | 2011-10-05 | $7700.00 | Window Closed / Lapsed |