US7310946B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for cooling charge air and method for operating a circuit arrangement of this type
Assignee: Mahle Behr GmbH and Co KG
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Filing: 2004-07-15
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Granted: 2007-12-25
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Expires: 2024-07-15
Abstract
Abstract The invention relates to a circuit arrangement (K) comprising a low-temperature circuit (NK) for cooling charge air ( 13 ) that is fed to a motor ( 8 ) in a motor vehicle equipped with a turbocharger. According to the invention, the charge air ( 13 ) is compressed in two stages in a first low-pressure turbocharger ( 1 ) and a second high-pressure turbocharger ( 2 ). To cool the charge air ( 13 ) a first cooler ( 3 ) is provided downstream of the low-pressure turbocharger ( 1 ) and upstream of the high-pressure turbocharger ( 2 ) and a second cooler ( 4 ) is provided downstream of the high-pressure turbocharger ( 2 ) and upstream of the motor ( 8 ). The invention also relates to a method for operating a circuit arrangement (K) of this type.
Inventors
- 👤 Stefan Rogg
- 👤 Annegret Srnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
F; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0412; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F02B29/0425; F02B29/0431; F02B29/0437; F02B29/0443; F02B37/00; F02B37/013; F01P3/00; F01P3/18; F01P2003/182; F01P2003/185; F01P2003/187; F01P5/00; F01P5/10; F01P2005/105; F01P2060/00; F01P2060/02; F02B29/045; F02B29/0475; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
172 words
A method for operating a circuit arrangement, wherein the circuit arrangement comprises a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, comprising: compressing the charge air in a first compressing stage with a first low-pressure turbocharger, cooling the charge air in a first cooling stage using a low-pressure charge air/coolant cooler provided downstream of the low-pressure turbocharger and upstream of a second high-pressure turbocharger, wherein coolant from the low-pressure charge air/coolant cooler flows into a coolant/air cooler; further compressing the cooled charge air in a second compressing stage with the second high-pressure turbocharger; and cooling the further compressed charge air in a second cooling stage using a high-pressure charge air/air cooler provided downstream of the high-pressure turbocharger and upstream of the engine, wherein the high-pressure charge air/air cooler is configured to use air flow of cooling air in a main cooling circuit upstream of a main coolant cooler as seen in a direction of the air flow of the cooling air.
Claim 2
Independent Claim
172 words
A method for operating a circuit arrangement, wherein the circuit arrangement comprises a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, comprising: compressing the charge air in a first compressing stage with a first low-pressure turbocharger, cooling the charge air in a first cooling stage using a low-pressure charge air/coolant cooler provided downstream of the low-pressure turbocharger and upstream of a second high-pressure turbocharger, wherein coolant from the low-pressure charge air/coolant cooler flows into a coolant/air cooler; further compressing the cooled charge air in a second compressing stage with the second high-pressure turbocharger; and cooling the further compressed charge air in a second cooling stage using a high-pressure charge air/air cooler provided downstream of the high-pressure turbocharger and upstream of the engine, wherein the high-pressure charge air/air cooler is configured to use air flow of cooling air in a main cooling circuit upstream of a main coolant cooler as seen in a direction of the air flow of the cooling air.
Claim 3
Dependent Claim
32 words
The method for operating a circuit arrangement as claimed in claim 1 , wherein the charge air after the first cooling stage has a temperature of between 40° C. and 110° C.
Claim 4
Dependent Claim
156 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a first cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a second cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, and a third cooler, wherein the third cooler and the second cooler form a cooling module, wherein a front face of the third cooler takes up 20% to 50% of a total front surface of the cooling module, wherein the low-temperature circuit is part of an engine cooling circuit.
Claim 5
Dependent Claim
156 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a first cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a second cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, and a third cooler, wherein the third cooler and the second cooler form a cooling module, wherein a front face of the third cooler takes up 20% to 50% of a total front surface of the cooling module, wherein the low-temperature circuit is part of an engine cooling circuit.
Claim 6
Dependent Claim
40 words
The circuit arrangement as claimed in claim 3 , wherein the low-temperature circuit branches off from a pressure side of a pump from the engine cooling circuit and is fed back to the engine cooling circuit at an engine outlet.
Claim 7
Dependent Claim
19 words
The circuit arrangement as claimed in claim 3 , wherein the first cooler comprises a low-pressure charge air/coolant cooler.
Claim 8
Dependent Claim
19 words
The circuit arrangement as claimed in claim 3 , wherein the second cooler comprises a high-pressure charge air/air cooler.
Claim 9
Dependent Claim
17 words
The circuit arrangement as claimed in claim 6 , wherein the third cooler is a low-temperature cooler.
Claim 10
Dependent Claim
163 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a low-pressure charge air/coolant cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a high-pressure charge air/air cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, and a third cooler that receives coolant from the low-pressure charge air/coolant cooler, wherein the high-pressure charge air/air cooler is configured to use air flow of cooling air in a main cooling circuit upstream of a main coolant cooler as seen in a direction of the air flow of the cooling air.
Claim 11
Dependent Claim
163 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a low-pressure charge air/coolant cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a high-pressure charge air/air cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, and a third cooler that receives coolant from the low-pressure charge air/coolant cooler, wherein the high-pressure charge air/air cooler is configured to use air flow of cooling air in a main cooling circuit upstream of a main coolant cooler as seen in a direction of the air flow of the cooling air.
Claim 12
Dependent Claim
30 words
The circuit arrangement as claimed in claim 8 , wherein the third cooler is a low-temperature cooler, and wherein the high-pressure charge air/air cooler is arranged alongside the low-temperature cooler.
Claim 13
Dependent Claim
45 words
The circuit arrangement as claimed in claim 9 , wherein the low-temperature cooler and the high-pressure charge air/air cooler form a cooling module, wherein a front face of the low-temperature cooler takes up 20% to 50% of a total front surface of the cooling module.
Claim 14
Dependent Claim
37 words
The circuit arrangement as claimed in claim 8 , wherein the motor vehicle comprises an engine cooling circuit, wherein the low-temperature circuit is independent of the engine cooling circuit and has its own pump for delivering coolant.
Claim 15
Dependent Claim
39 words
The circuit arrangement as claimed in claim 11 , wherein the pump in the low-temperature circuit is arranged between the third cooler and the low-pressure charge air/coolant cooler or between the low-pressure charge air/coolant cooler and the third cooler.
Claim 16
Dependent Claim
20 words
The circuit arrangement as claimed in claim 8 , wherein the low-temperature circuit is part of an engine cooling circuit.
Claim 17
Dependent Claim
40 words
The circuit arrangement as claimed in claim 13 , wherein the low-temperature circuit branches off from a pressure side of a pump from the engine cooling circuit and is fed back to the engine cooling circuit at an engine outlet.
Claim 18
Dependent Claim
172 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a first cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a second cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, wherein the second cooler comprises a high-pressure charge air/air cooler; and a third cooler, wherein the third cooler is a low-temperature cooler configured such that low-temperature coolant from the first cooler flows through the low-temperature cooler, wherein the high-pressure charge air/air cooler is arranged alongside the low-temperature cooler and, seen in a direction of air flow of cooling air, upstream of a main coolant cooler.
Claim 19
Dependent Claim
172 words
A circuit arrangement comprising: a low-temperature circuit for cooling charge air that is fed to an engine in a motor vehicle equipped with turbochargers, wherein the low-temperature circuit comprises: a first low-pressure turbocharger for compressing the charge air in a first compressing stage; a second high pressure turbocharger for compressing the charge air in a second compressing stage; a first cooler provided downstream of the low-pressure turbocharger and upstream of the high-pressure turbocharger for cooling the charge air in a first cooling stage; a second cooler provided downstream of the high-pressure turbocharger and upstream of the engine for cooling the charge air in a second cooling stage, wherein the second cooler comprises a high-pressure charge air/air cooler; and a third cooler, wherein the third cooler is a low-temperature cooler configured such that low-temperature coolant from the first cooler flows through the low-temperature cooler, wherein the high-pressure charge air/air cooler is arranged alongside the low-temperature cooler and, seen in a direction of air flow of cooling air, upstream of a main coolant cooler.
Claim 20
Dependent Claim
45 words
The circuit arrangement as claimed in claim 15 , wherein the low-temperature cooler and the high-pressure charge air/air cooler form a cooling module, wherein a front face of the low-temperature cooler takes up 20% to 50% of a total front surface of the cooling module.
Claim 21
Dependent Claim
19 words
The circuit arrangement as claimed in claim 15 , wherein the first cooler comprises a low-pressure charge air/coolant cooler.
Claim 22
Dependent Claim
37 words
The circuit arrangement as claimed in claim 15 , wherein the motor vehicle comprises an engine cooling circuit, wherein the low-temperature circuit is independent of the engine cooling circuit and has its own pump for delivering coolant.
Claim 23
Dependent Claim
35 words
The circuit arrangement as claimed in claim 18 , wherein the pump in the low-temperature circuit is arranged between the low-temperature cooler and the first cooler or between the first cooler and the low-temperature cooler.
Claim 24
Dependent Claim
20 words
The circuit arrangement as claimed in claim 15 , wherein the low-temperature circuit is part of an engine cooling circuit.
Claim 25
Dependent Claim
40 words
The circuit arrangement as claimed in claim 20 , wherein the low-temperature circuit branches off from a pressure side of a pump from the engine cooling circuit and is fed back to the engine cooling circuit at an engine outlet.
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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) | 2010-12-24 | 2011-06-25 | 2011-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-12-24 | 2015-06-25 | 2015-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-12-24 | 2019-06-25 | 2019-12-25 | $7700.00 | Window Closed / Lapsed |