Patent US6536381B2 successfully refreshed from Google Patents.
US6536381B2
Expired / Lapsed
US
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Vehicle lubricant temperature control
Assignee: Volvo Trucks North America Inc
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Filing: 2001-02-20
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Granted: 2003-03-25
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Expires: 2021-02-20
Abstract
Abstract An oil cooling system is disclosed in the environment of an over the road vehicle having a transmission and an internal combustion engine. A primary liquid to liquid heat exchanger is connected to the engine cooling system and connected to a selected on of, or both, an engine lubricant system and the transmission for cooling circulation of oil. An auxiliary heat exchanger is connected in parallel with the primary heat exchanger for selective additional cooling circulation of the oil.
Inventors
- 👤 Dennis Langervik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:28
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F16H57/0413; F01; F01P; F01P3/00; F01P3/20; F01P2025/00; F01P2025/08; F01P2025/40; F01P2050/00; F01P2050/02; F01P2050/06; F01P2060/00; F01P2060/04; F01P2060/045
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
110 words
In a vehicle having a transmission and an internal combustion engine equipped with an engine cooling system, a fluid cooling system comprising: a) a liquid to liquid heat exchanger connected to the engine cooling system and connected to a selected one of an engine lubricant system and a transmission liquid system for cooling circulation of a system liquid from the selected one through the liquid to liquid heat exchanger; b) a cooling fluid to liquid heat exchanger connected to said selected one and adapted to receive said cooling fluid for cooling circulation of the selected system liquid; and, c) the heat exchangers being connected to the selected system in parallel.
Claim 2
Dependent Claim
110 words
In a vehicle having a transmission and an internal combustion engine equipped with an engine cooling system, a fluid cooling system comprising: a) a liquid to liquid heat exchanger connected to the engine cooling system and connected to a selected one of an engine lubricant system and a transmission liquid system for cooling circulation of a system liquid from the selected one through the liquid to liquid heat exchanger; b) a cooling fluid to liquid heat exchanger connected to said selected one and adapted to receive said cooling fluid for cooling circulation of the selected system liquid; and, c) the heat exchangers being connected to the selected system in parallel.
Claim 3
Dependent Claim
15 words
The cooling system of claim 1 , wherein the selected system liquid is engine lubricant.
Claim 4
Dependent Claim
13 words
The cooling system of claim 2 , wherein the cooling fluid is air.
Claim 5
Dependent Claim
14 words
The cooling system of claim 2 , wherein the cooling fluid is a liquid.
Claim 6
Dependent Claim
14 words
The cooling system of claim 1 , wherein the system liquid is transmission oil.
Claim 7
Dependent Claim
13 words
The cooling system of claim 5 , wherein the cooling fluid is air.
Claim 8
Dependent Claim
14 words
The cooling system of claim 5 , wherein the cooling fluid is a liquid.
Claim 9
Dependent Claim
13 words
The cooling system of claim 1 , wherein the cooling fluid is air.
Claim 10
Dependent Claim
14 words
The cooling system of claim 1 , wherein the cooling fluid is a liquid.
Claim 11
Dependent Claim
41 words
The cooling system of claim 1 , wherein the system liquid is circulated through the cooling fluid to liquid heat exchanger when such system liquid exits the liquid to liquid heat exchanger at a temperature in excess of a predetermined temperature.
Claim 12
Dependent Claim
38 words
The cooling system of claim 10 , wherein the lubricant is circulated through the air to liquid heat exchanger when such lubricant exits the liquid to liquid heat exchanger at a temperature in excess of a predetermined temperature.
Claim 13
Dependent Claim
44 words
The cooling system of claim 1 , wherein the system liquid in such system is prevented from flowing through the cooling fluid to liquid heat exchanger when the system liquid exits the liquid to liquid heat exchanger at a temperature below a predetermined temperature.
Claim 14
Dependent Claim
38 words
The cooling system of claim 12 , wherein the lubricant is prevented from flowing through the air to liquid heat exchanger when the lubricant exits the liquid to liquid heat exchanger at a temperature below a predetermined temperature.
Claim 15
Dependent Claim
128 words
In an over the highway truck or tractor, an engine lubricant cooling system comprising: a) a liquid to liquid heat exchanger connected to an engine cooling system for circulating engine coolant through the liquid to liquid heat exchanger; b) the liquid to liquid heat exchanger also being connected to an engine lubricant system for circulating lubricant through the liquid to liquid heat exchanger for cooling such lubricant; c) an air to liquid heat exchanger connected to the lubricant system for circulating lubricant through the air to liquid heat exchanger for further cooling of such lubricant; d) the air to liquid heat exchanger also being positioned to receive a flow of cooling air therethrough when the vehicle is in operation; and e) the heat exchangers being connected in parallel.
Claim 16
Dependent Claim
128 words
In an over the highway truck or tractor, an engine lubricant cooling system comprising: a) a liquid to liquid heat exchanger connected to an engine cooling system for circulating engine coolant through the liquid to liquid heat exchanger; b) the liquid to liquid heat exchanger also being connected to an engine lubricant system for circulating lubricant through the liquid to liquid heat exchanger for cooling such lubricant; c) an air to liquid heat exchanger connected to the lubricant system for circulating lubricant through the air to liquid heat exchanger for further cooling of such lubricant; d) the air to liquid heat exchanger also being positioned to receive a flow of cooling air therethrough when the vehicle is in operation; and e) the heat exchangers being connected in parallel.
Claim 17
Dependent Claim
123 words
A vehicle comprising: a) a power train including an internal combustion engine and a transmission; b) the engine including a cooling system for circulating liquid coolant through the engine to maintain engine operating temperatures within a predetermined operating range, c) the engine also including an oil pan and a lubricant circulating system for circulating lubricating oil from the pan through the engine and return; d) the transmission including a transmission oil system for lubricating transmission gears; e) a primary heat exchanger connected to the cooling system and a selected one of the engine and transmission for cooling circulation of oil through the primary heat exchanger; and f) an auxiliary heat exchanger connected to said selected one in parallel with the primary heat exchanger.
Claim 18
Dependent Claim
123 words
A vehicle comprising: a) a power train including an internal combustion engine and a transmission; b) the engine including a cooling system for circulating liquid coolant through the engine to maintain engine operating temperatures within a predetermined operating range, c) the engine also including an oil pan and a lubricant circulating system for circulating lubricating oil from the pan through the engine and return; d) the transmission including a transmission oil system for lubricating transmission gears; e) a primary heat exchanger connected to the cooling system and a selected one of the engine and transmission for cooling circulation of oil through the primary heat exchanger; and f) an auxiliary heat exchanger connected to said selected one in parallel with the primary heat exchanger.
Claim 19
Dependent Claim
13 words
The vehicle of claim 15 , wherein the selected one is the engine.
Claim 20
Dependent Claim
13 words
The vehicle of claim 15 , wherein the selected one is the transmission.
Claim 21
Dependent Claim
18 words
The vehicle of claim 15 , wherein the auxiliary heat exchanger is cooled by a flow of air.
Claim 22
Dependent Claim
23 words
The vehicle of claim 15 , wherein the auxiliary heat exchanger is cooled by a flow of liquid coolant from an auxiliary source.
Claim 23
Dependent Claim
58 words
The vehicle of claim 15 , wherein a temperature sensor senses the temperature of oil exiting the primary heat exchanger and a sensor controlled valve enables oil flow through the auxiliary heat exchanger when the sensored temperature exceeds a predetermined level and disables flow through the auxiliary heat exchanger when the sensed temperature is below the predetermined level.
Claim 24
Dependent Claim
18 words
The combination of claim 15 wherein the vehicle is a heavy duty over the highway truck or tractor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-03-24 | 2006-09-23 | 2007-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-24 | 2010-09-23 | 2011-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-24 | 2014-09-23 | 2015-03-25 | $7700.00 | Window Closed / Lapsed |