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US7219661B2
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Exhaust gas recirculation means and process for operation of the exhaust gas recirculation means
Assignee: Volkswagen AG
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Filing: 2005-09-09
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Granted: 2007-05-22
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Expires: 2025-09-09
Abstract
Abstract The invention relates to an exhaust gas recirculation means 1 for an internal combustion engine 2 with an air supply line 12 which has an air cooler 13 and which is connected to the air inlet 10 of the internal combustion engine 2 , and with an exhaust pipe 14 which is connected to the exhaust gas outlet 11 of the internal combustion engine 2 , the exhaust pipe 14 being connected by way of a closable exhaust gas recirculation line 16 to the air supply line 12 , and the exhaust gas recirculation line 16 being connected in the flow direction to the air supply line 12 upstream from the air cooler 13 . Furthermore the invention relates to a process for operating such an exhaust gas recirculation means 1 . To improve the dynamics of the internal combustion engine 2 , for the exhaust gas recirculation means 1 it is proposed that the air cooler 13 has a bypass air line 31 . With respect to the process for operating the exhaust gas recirculation means 1 it is proposed that in the aforementioned exhaust gas recirculation means 1 , when the exhaust gas recirculation line 16 is at least partially opened, the bypass air line 31 is at least partially opened and the cooler supply 35 is closed.
Inventors
- 👤 Werner Aberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:22
CPC Classifications
F; F02; F02B; F02B47/00; F02B47/04; F02B47/08; F02B29/00; F02B29/04; F02B29/0406; F02B29/0418; F02M; F02M26/00; F02M26/02; F02M26/04; F02M26/06; F02M26/13; F02M26/22; F02M26/23; F02M26/25; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F02B37/00; F02B37/12; F02B37/22; F02M26/09; F02M26/10; F02M26/14; F02M26/15; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
259 words
An exhaust gas recirculation means for an internal combustion engine with an air supply line which has an air cooler and which is connected to the air inlet of the internal combustion engine, and with an exhaust pipe which is connected to the exhaust gas outlet of the internal combustion engine, the exhaust pipe being connected by way of an exhaust gas recirculation line to the air supply line, and the exhaust gas recirculation line being connected in the flow direction to the air supply line upstream from the air cooler, characterized in that the air cooler ( 13 ) has a bypass air line ( 31 ); wherein in the exhaust pipe ( 14 ) in the flow direction upstream from the branch ( 20 ) of the exhaust gas recirculation line ( 16 ) there is the turbine ( 17 ) of the exhaust gas turbocharger ( 18 ) for driving the compressor ( 21 ) of the exhaust gas turbocharger ( 18 ), which compressor is located in the air supply line ( 12 ) in the flow direction downstream from the mouth ( 23 ) of the exhaust gas recirculation line ( 16 ) and upstream from the air cooler ( 13 ); and the air supply line ( 12 ) in the flow direction downstream from the branch ( 34 ) of the bypass air line ( 31 ) and upstream from the air cooler ( 13 ) has a cooler air butterfly valve ( 33 ) in the cooler supply ( 35 ).
Claim 2
Dependent Claim
259 words
An exhaust gas recirculation means for an internal combustion engine with an air supply line which has an air cooler and which is connected to the air inlet of the internal combustion engine, and with an exhaust pipe which is connected to the exhaust gas outlet of the internal combustion engine, the exhaust pipe being connected by way of an exhaust gas recirculation line to the air supply line, and the exhaust gas recirculation line being connected in the flow direction to the air supply line upstream from the air cooler, characterized in that the air cooler ( 13 ) has a bypass air line ( 31 ); wherein in the exhaust pipe ( 14 ) in the flow direction upstream from the branch ( 20 ) of the exhaust gas recirculation line ( 16 ) there is the turbine ( 17 ) of the exhaust gas turbocharger ( 18 ) for driving the compressor ( 21 ) of the exhaust gas turbocharger ( 18 ), which compressor is located in the air supply line ( 12 ) in the flow direction downstream from the mouth ( 23 ) of the exhaust gas recirculation line ( 16 ) and upstream from the air cooler ( 13 ); and the air supply line ( 12 ) in the flow direction downstream from the branch ( 34 ) of the bypass air line ( 31 ) and upstream from the air cooler ( 13 ) has a cooler air butterfly valve ( 33 ) in the cooler supply ( 35 ).
Claim 3
Dependent Claim
47 words
The exhaust gas recirculation means as claimed in claim 1 , wherein in the exhaust pipe ( 14 ) in the flow direction there is a particle filter ( 19 ) upstream from the branch ( 20 ) of the exhaust gas recirculation line ( 16 ).
Claim 4
Dependent Claim
47 words
The exhaust gas recirculation means as claimed in claim 1 , wherein in the exhaust pipe ( 14 ) in the flow direction there is a particle filter ( 19 ) upstream from the branch ( 20 ) of the exhaust gas recirculation line ( 16 ).
Claim 5
Dependent Claim
104 words
The exhaust gas recirculation means as claimed in claim 1 , wherein the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ) each can be adjusted between a first position which completely closes the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ) and a second position which completely clears the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ).
Claim 6
Dependent Claim
45 words
The exhaust gas recirculation means as claimed in claim 1 , wherein there is a control device for adjusting the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ).
Claim 7
Dependent Claim
29 words
The exhaust gas recirculation means as claimed in claim 1 , wherein the exhaust gas recirculation line ( 16 ) has an exhaust gas butterfly valve ( 15 ).
Claim 8
Dependent Claim
104 words
The exhaust gas recirculation means as claimed in claim 6 , wherein the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ) each can be adjusted between a first position which completely closes the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ) and a second position which completely clears the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ).
Claim 9
Dependent Claim
45 words
The exhaust gas recirculation means as claimed in claim 6 , wherein there is a control device for adjusting the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ).
Claim 10
Dependent Claim
28 words
The exhaust gas recirculation means as claimed in claim 1 , wherein the exhaust gas recirculation line ( 16 ) has an exhaust gas cooler ( 28 ).
Claim 11
Dependent Claim
44 words
The exhaust gas recirculation means as claimed in claim 9 , wherein the exhaust gas cooler ( 28 ) has an exhaust gas cooling circuit ( 27 ) which is independent of the engine cooling circuit of the internal combustion engine ( 2 ).
Claim 12
Dependent Claim
28 words
The exhaust gas recirculation means as claimed in claim 9 , wherein the exhaust gas cooler ( 28 ) has an exhaust gas bypass line ( 29 ).
Claim 13
Dependent Claim
44 words
The exhaust gas recirculation means as claimed in claim 11 , wherein the exhaust gas cooler ( 28 ) has an exhaust gas cooling circuit ( 27 ) which is independent of the engine cooling circuit of the internal combustion engine ( 2 ).
Claim 14
Dependent Claim
28 words
The exhaust gas recirculation means as claimed in claim 1 , wherein the bypass air line ( 31 ) has a bypass air butterfly valve ( 32 ).
Claim 15
Dependent Claim
45 words
The exhaust gas recirculation means as claimed in claim 13 , wherein there is a control device for adjusting the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ).
Claim 16
Dependent Claim
104 words
The exhaust gas recirculation means as claimed in claim 13 , wherein the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ) each can be adjusted between a first position which completely closes the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ) and a second position which completely clears the bypass air line ( 31 ) or the air supply line ( 12 ) or the exhaust gas recirculation line ( 16 ).
Claim 17
Dependent Claim
45 words
The exhaust gas recirculation means as claimed in claim 15 , wherein there is a control device for adjusting the bypass air butterfly valve ( 32 ) and/or the cooler air butterfly valve ( 33 ) and/or the exhaust gas butterfly valve ( 15 ).
Claim 18
Dependent Claim
51 words
A process for operating the exhaust gas recirculation means as set forth in claim 1 wherein, when the exhaust gas recirculation line ( 16 ) is at least partially opened, the bypass air line ( 31 ) is at least partially opened and the cooler supply ( 35 ) is closed.
Claim 19
Dependent Claim
33 words
The process as claimed in claim 17 wherein, when the internal combustion engine ( 2 ) is operating in the full load range, the cooler air butterfly valve ( 33 ) is opened.
Claim 20
Dependent Claim
28 words
The process as claimed in claim 17 wherein, when the internal combustion engine ( 2 ) is accelerating, the cooler air butterfly valve ( 33 ) is opened.
Claim 21
Dependent Claim
33 words
The process as claimed in claim 19 wherein, when the internal combustion engine ( 2 ) is operating in the full load range, the cooler air butterfly valve ( 33 ) is opened.
Claim 22
Dependent Claim
32 words
The process as claimed in claim 17 wherein, when the exhaust gas butterfly valve ( 15 ) is at least partially opened, the cooler air butterfly valve ( 33 ) is closed.
Claim 23
Dependent Claim
33 words
The process as claimed in claim 21 wherein, when the internal combustion engine ( 2 ) is operating in the full load range, the cooler air butterfly valve ( 33 ) is opened.
Claim 24
Dependent Claim
28 words
The process as claimed in claim 21 wherein, when the internal combustion engine ( 2 ) is accelerating, the cooler air butterfly valve ( 33 ) is opened.
Claim 25
Dependent Claim
33 words
The process as claimed in claim 23 wherein, when the internal combustion engine ( 2 ) is operating in the full load range, the cooler air butterfly valve ( 33 ) is opened.
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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) | 2010-05-21 | 2010-11-20 | 2011-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-05-21 | 2014-11-20 | 2015-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-05-21 | 2018-11-20 | 2019-05-22 | $7700.00 | Window Closed / Lapsed |