US7254947B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle cooling system
Assignee: Deere and Co
•
Filing: 2005-06-10
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Granted: 2007-08-14
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Expires: 2025-06-10
Abstract
Abstract A vehicle engine cooling system includes a primary cooling circuit having a primary radiator and a coolant pump. A secondary cooling circuit includes a secondary radiator, an EGR cooler, and a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor. The coolant pump circulates coolant through the EGR cooler, through the charge air pre-cooler, and through the primary and secondary radiators. A fan blows cooling air through the primary and secondary radiators. The secondary radiator is downstream of the primary radiator in the fan airflow. The cooling system also includes an air-to-air charge air cooler which receives engine inlet air from the liquid/air charge air pre-cooler. The air-to-air charge air cooler is upstream of the primary radiator with respect to flow of cooling air. The cooling system also includes an auxiliary engine fluid cooler which is located between the air-to-air charge air cooler and the primary radiator.
Inventors
- 👤 Ronnie Franklin Burk
- 👤 James Anton Miller
- 👤 Alan David Sheidler
- 👤 Teryl Marvin Oftedal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:08
CPC Classifications
F; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0437; F02B29/0443; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/28; F01; F01P; F01P2060/00; F01P2060/02; F01P2060/04; F01P2060/045; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F02B29/0412; F02B29/0425; F02B37/00; F02M26/02; F02M26/04; F02M26/05; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator, and a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an exhaust gas recirculation (EGR) cooler, the coolant pump circulating coolant through the engine, the EGR cooler and the secondary radiator, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 2
Dependent Claim
108 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator, and a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an exhaust gas recirculation (EGR) cooler, the coolant pump circulating coolant through the engine, the EGR cooler and the secondary radiator, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 3
Dependent Claim
37 words
The cooling system of claim 1 , further comprising: a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor, the coolant pump circulating coolant through the charge air pre-cooler and through the secondary radiator.
Claim 4
Dependent Claim
42 words
The cooling system of claim 2 , further comprising: an air-to-air charge air cooler, receiving engine inlet air from the liquid/air charge air pre-cooler, the air-to-air charge air cooler being upstream of the primary radiator with respect to flow of cooling air.
Claim 5
Dependent Claim
35 words
The cooling system of claim 3 , further comprising: an auxiliary engine fluid cooler, the auxiliary cooler being between the air-to-air charge air cooler and the primary radiator with respect to flow of cooling air.
Claim 6
Dependent Claim
42 words
The cooling system of claim 1 , wherein: the secondary radiator has a coolant outlet communicated with a coolant inlet of the primary radiator so that the primary radiator is directly downstream of the secondary radiator with respect to flow of coolant.
Claim 7
Dependent Claim
135 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator and a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an engine air cooler, the coolant pump circulating coolant through the engine, the engine air cooler and the secondary radiator, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor, the coolant pump circulating coolant through the charge air pre-cooler and through the secondary radiator; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 8
Dependent Claim
135 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator and a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an engine air cooler, the coolant pump circulating coolant through the engine, the engine air cooler and the secondary radiator, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor, the coolant pump circulating coolant through the charge air pre-cooler and through the secondary radiator; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 9
Dependent Claim
17 words
The cooling system of claim 6 , wherein: the engine air cooler comprises a charge air pre-cooler.
Claim 10
Dependent Claim
42 words
The cooling system of claim 6 , further comprising: an air-to-air charge air cooler, receiving engine inlet air from the liquid/air charge air pre-cooler, the air-to-air charge air cooler being upstream of the primary radiator with respect to flow of cooling air.
Claim 11
Dependent Claim
35 words
The cooling system of claim 8 , further comprising: an auxiliary engine fluid cooler, the auxiliary cooler being between the air-to-air charge air cooler and the primary radiator with respect to flow of cooling air.
Claim 12
Dependent Claim
124 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator, a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an exhaust gas recirculation (EGR) cooler, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor, the coolant pump circulating coolant through the EGR cooler, through the charge air pre-cooler and through the secondary radiator; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 13
Dependent Claim
124 words
A vehicle engine cooling system: a primary cooling circuit having a primary radiator, a coolant pump for circulating coolant through the engine and the primary radiator; a secondary cooling circuit having a secondary radiator and an exhaust gas recirculation (EGR) cooler, the primary cooling circuit operating at a temperature which is lower than an operating temperature of the secondary cooling circuit; a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor, the coolant pump circulating coolant through the EGR cooler, through the charge air pre-cooler and through the secondary radiator; and a fan for blowing cooling air through the primary radiator and the secondary radiator, the secondary radiator being downstream of the primary radiator with respect to flow of cooling air.
Claim 14
Dependent Claim
42 words
The cooling system of claim 10 , further comprising: an air-to-air charge air cooler, receiving engine inlet air from the liquid/air charge air pre-cooler, the air-to-air charge air cooler being upstream of the primary radiator with respect to flow of cooling air.
Claim 15
Dependent Claim
35 words
The cooling system of claim 10 , further comprising: an auxiliary engine fluid cooler, the auxiliary cooler being between the air-to-air charge air cooler and the primary radiator with respect to flow of cooling air.
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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) | 2010-08-13 | 2011-02-12 | 2011-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-08-13 | 2015-02-12 | 2015-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-08-13 | 2019-02-12 | 2019-08-14 | $7700.00 | Window Closed / Lapsed |