US5020482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cooling a charged piston internal-combustion engine
Assignee: Rolls Royce Solutions GmbH
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Filing: 1989-06-23
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Granted: 1991-06-04
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Expires: 2009-06-23
Abstract
Abstract The device has one circulating-system branch respectively for the charge air cooling, the engine cooling and the coolant recooling. Using a change-over device, the circulating-system branches are connected to form a common coolant circulating system. The change-over device can be controlled as a function of the coolant temperature and the charge air pressure and, according to the respective operating requirement, controls the coolant throughput in the circulating-system branches.
Inventors
- 👤 Herbert Deutschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:02
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F01P3/00; F01P3/20; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0437; F02B29/0443; F01P2050/00; F01P2050/02; F01P2050/06; F01P2060/00; F01P2060/02; F01P2060/04; F02B29/0493; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A device for cooling a charged piston internal combustion engine equipped with a charge air cooler and a coolant recooler, comprising: a closed coolant circulating system having several circulating-system branches with a common coolant pump; a change-over device for controlling coolant flow to the several circulating-system branches which selectively connects a coolant outlet pipe of the piston internal combustion engine and a coolant outlet pipe of the coolant recooler with a coolant inlet pipe of the charge air cooler and a charge air cooler bypass pipe; and a heat exchanger arranged in a coolant inlet pipe of the piston internal combustion engine which is provided with coolant from the charge air cooler bypass pipe under the control of a thermostat valve.
Claim 2
Independent Claim
121 words
A device for cooling a charged piston internal combustion engine equipped with a charge air cooler and a coolant recooler, comprising: a closed coolant circulating system having several circulating-system branches with a common coolant pump; a change-over device for controlling coolant flow to the several circulating-system branches which selectively connects a coolant outlet pipe of the piston internal combustion engine and a coolant outlet pipe of the coolant recooler with a coolant inlet pipe of the charge air cooler and a charge air cooler bypass pipe; and a heat exchanger arranged in a coolant inlet pipe of the piston internal combustion engine which is provided with coolant from the charge air cooler bypass pipe under the control of a thermostat valve.
Claim 3
Dependent Claim
32 words
A device for the cooling of a charged piston internal combustion engine according to claim 1, wherein the change-over device has a thermostatic control which at least partially determines the selective connecting.
Claim 4
Dependent Claim
42 words
A device for the cooling of a charged piston internal combustion engine according to claim 2, wherein the change-over device has a control device which is acted upon by charge air pressure and which overrides the thermostatic control of the change-over device.
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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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |