US7210469B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation catalyst coating in a heat exchanger
Assignee: International Engine Intellectual Property Co LLC
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Filing: 2005-12-05
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Granted: 2007-05-01
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Expires: 2025-12-05
Abstract
Abstract A method for an internal combustion engine includes the steps of collecting exhaust gas in a volume ( 902 ) and flowing exhaust gas out of the volume in a first and a second portions ( 904 ). The first portion forms a tailpipe gas stream ( 906 ), and the second portion forms an EGR gas stream ( 908 ). The tailpipe gas stream goes through a turbine ( 910 ). The EGR gas stream is catalyzed by an oxidizer coating in a heat exchanger, and thermal energy is transferred from the EGR gas stream to the tailpipe stream in the heat exchanger ( 916 ).
Inventors
- 👤 Gregory J. Saele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:17
CPC Classifications
F; F02; F02B; F02B37/00; F01; F01N; F01N3/00; F01N3/02; F01N3/0205; F02M; F02M26/00; F02M26/13; F02M26/14; F02M26/15; F02M26/22; F02M26/23; F02M26/24; F02M26/25; F02M26/29; F02M26/32; F28; F28D; F28D7/00; F28D7/10; F28D7/106; F01N2240/00; F01N2240/02; F02B29/00; F02B29/04; F02B29/0406; F02B47/00; F02B47/04; F02B47/08; F02M26/02; F02M26/04; F02M26/05; F28F; F28F2240/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
102 words
A method for an internal combustion engine comprising the steps of: collecting exhaust gas in a volume; flowing exhaust gas out of the volume in a first and a second portions, wherein the first portion forms a tailpipe gas stream, and wherein the second portion forms an exhaust gas recirculation (EGR) gas stream; passing the tailpipe gas stream through a turbine; catalyzing the EGR gas stream with an oxidizer coating in a heat exchanger; and transferring thermal energy from the EGR gas stream to the tailpipe stream in the heat exchanger, wherein the EGR gas stream is cooled in the heat exchanger.
Claim 2
Independent Claim
102 words
A method for an internal combustion engine comprising the steps of: collecting exhaust gas in a volume; flowing exhaust gas out of the volume in a first and a second portions, wherein the first portion forms a tailpipe gas stream, and wherein the second portion forms an exhaust gas recirculation (EGR) gas stream; passing the tailpipe gas stream through a turbine; catalyzing the EGR gas stream with an oxidizer coating in a heat exchanger; and transferring thermal energy from the EGR gas stream to the tailpipe stream in the heat exchanger, wherein the EGR gas stream is cooled in the heat exchanger.
Claim 3
Dependent Claim
33 words
The method of claim 1 , wherein the volume is an exhaust manifold of the internal combustion engine, and wherein the EGR gas stream flows from the exhaust manifold upstream of the turbine.
Claim 4
Dependent Claim
21 words
The method of claim 1 , wherein the tailpipe gas stream is exhaust gas flowing from an outlet of the turbine.
Claim 5
Dependent Claim
15 words
The method of claim 1 , wherein the heat exchanger is an air-to-air heat exchanger.
Claim 6
Dependent Claim
22 words
The method of claim 1 , further comprising the step of passing the tailpipe gas stream through at least one after-treatment component.
Claim 7
Dependent Claim
31 words
The method of claim 1 , wherein step of catalyzing is accomplished by contact between the EGR gas stream and a material layered onto an internal surface of the heat exchanger.
Claim 8
Independent Claim
116 words
An apparatus comprising: an engine having an intake manifold and an exhaust manifold; a turbine in fluid communication with the exhaust manifold; a heat exchanger having a hot gas inlet, a cold gas inlet, a warm gas outlet, and a cooled gas outlet; an oxidation catalyst material layer disposed on an internal surface of the heat exchanger; wherein the hot gas inlet is in direct fluid communication with the exhaust manifold and the cooled gas outlet, wherein the cold gas inlet is in direct fluid communication with the turbine and the warm gas outlet; and wherein the internal surface of the heat exchanger is in fluid communication with the cooled gas outlet and the intake manifold.
Claim 9
Independent Claim
116 words
An apparatus comprising: an engine having an intake manifold and an exhaust manifold; a turbine in fluid communication with the exhaust manifold; a heat exchanger having a hot gas inlet, a cold gas inlet, a warm gas outlet, and a cooled gas outlet; an oxidation catalyst material layer disposed on an internal surface of the heat exchanger; wherein the hot gas inlet is in direct fluid communication with the exhaust manifold and the cooled gas outlet, wherein the cold gas inlet is in direct fluid communication with the turbine and the warm gas outlet; and wherein the internal surface of the heat exchanger is in fluid communication with the cooled gas outlet and the intake manifold.
Claim 10
Dependent Claim
21 words
The apparatus of claim 7 , further comprising an exhaust gas recirculation valve in fluid communication with the cooled gas outlet.
Claim 11
Dependent Claim
20 words
The apparatus of claim 7 , further comprising an exhaust gas recirculation cooler in fluid communication with the EGR valve.
Claim 12
Dependent Claim
31 words
The apparatus of claim 7 , further comprising an after-treatment component in fluid communication with the warm gas outlet, wherein the at least one after-treatment component is a diesel particulate filter.
Claim 13
Dependent Claim
15 words
The apparatus of claim 7 , wherein the heat exchanger is an air-to-air heat exchanger.
Claim 14
Dependent Claim
41 words
The apparatus of claim 11 , wherein the air-to-air heat exchanger includes an inner tube and an outer tube, wherein the inner tube and the outer tube are concentric, and wherein the oxidation material layer is disposed on the inner tube.
Claim 15
Dependent Claim
47 words
The apparatus of claim 12 , further comprising at least one section of a substructure having a structure and a plurality of openings, wherein the substructure is disposed between the inner tube and the outer tube, and wherein the oxidation material layer is disposed on the substructure.
Claim 16
Dependent Claim
94 words
An air-to-air heat exchanger, comprising: an inner tube; an outer tube disposed around the inner tube, wherein the inner tube and the outer tube are concentric; a plurality of tabs connected between the inner tube and the outer tube; and an oxidation material layer disposed between the inner tube and the outer tube; wherein a first gas stream flows in a first direction in an inner volume of the inner tube, and wherein a second gas stream flows in a second direction in a volume formed between the inner tube and the outer tube.
Claim 17
Dependent Claim
94 words
An air-to-air heat exchanger, comprising: an inner tube; an outer tube disposed around the inner tube, wherein the inner tube and the outer tube are concentric; a plurality of tabs connected between the inner tube and the outer tube; and an oxidation material layer disposed between the inner tube and the outer tube; wherein a first gas stream flows in a first direction in an inner volume of the inner tube, and wherein a second gas stream flows in a second direction in a volume formed between the inner tube and the outer tube.
Claim 18
Dependent Claim
21 words
The air-to-air heat exchanger of claim 14 , wherein the inner tube and the outer tube are thin walled steel tubes.
Claim 19
Dependent Claim
20 words
The air-to-air heat exchanger of claim 14 , wherein the inner tube and the outer tube follow a common path.
Claim 20
Dependent Claim
37 words
The air-to-air heat exchanger of claim 14 , wherein the plurality of tabs consists of tabs that are arranged along a plurality of radial directions with respect to a common center-point to form a plurality of sections.
Claim 21
Dependent Claim
45 words
The air-to-air heat exchanger of claim 17 , further comprising a substructure disposed in at least one of the plurality of sections, wherein the substructure includes a structure having a plurality of openings, and wherein the oxidation catalyst material layer is disposed on the substructure.
Claim 22
Dependent Claim
24 words
The air-to-air heat exchanger of claim 14 , wherein the oxidation catalyst material layer is coated onto an outer surface of the inner tube.
Claim 23
Dependent Claim
23 words
The air-to-air heat exchanger of claim 19 , wherein the oxidation catalyst material layer extends along an entire periphery of the outer surface.
References Cited (Backward Citations)
EP0099658A2
Cited
JPS6245922A
Cited
US4852642A
Cited
US6193942B1
Cited
US5785030A
Cited
US6202402B1
Cited
US20030108465A1
Cited
US6591818B2
Cited
US20020040708A1
Cited
US6849352B2
Cited
US20040231328A1
Cited
US20050199381A1
Cited
US6826903B2
Cited
US6804952B2
Cited
US6880535B2
Cited
JP2006078062A
Cited
US20060075995A1
Cited
US20060124114A1
Cited
US20060174611A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-04-30 | 2010-10-30 | 2011-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-04-30 | 2014-10-30 | 2015-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-04-30 | 2018-10-30 | 2019-05-01 | $7700.00 | Window Closed / Lapsed |