Vehicle lubricant temperature control
First Claim
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1. 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.
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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.
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Citations
21 Claims
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1. In a vehicle having a transmission and an internal combustion engine equipped with an engine cooling system, a fluid cooling system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In an over the highway truck or tractor, an engine lubricant cooling system comprising:
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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.
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15. A vehicle comprising:
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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. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification