US5934073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary heating for motor vehicles with internal combustion engines
Assignee: DMC2 Degussa Metals Catalysts Cerdec AG
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Filing: 1998-05-14
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Granted: 1999-08-10
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Expires: 2018-05-14
Abstract
Abstract An auxiliary heating system for a motor vehicle with an internal combustion engine. The auxiliary heating includes an emission control catalyst and a heat exchanger, integrated in the converter housing in front of and/or behind the catalyst, which provides the reaction heat released by the catalyst and the remaining heat of the exhaust gas to the heating of the passenger compartment. The heat generation may be increased by the injection of a fuel/air mixture before the catalyst and by using the catalyst as a catalytic burner and can be adapted to the heat requirements. The auxiliary heating of the invention prevents possible thermal damage of the catalyst during operation as a catalytic burner without many regulating elements by cooling the catalyst radiation. For this purpose, the heat exchanger is provided with an exchange surface which can freely exchange radiation with the radiant surface of the catalytic element.
Inventors
- 👤 Jurgen Gieshoff
- 👤 Egbert Lox
- 👤 Thomas Kreuzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:46
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; F01N3/2033; F01N3/24; F01N3/28; F01N3/2882; F01N3/2889; F01N5/00; F01N5/02; F01N2240/00; F01N2240/02; F01N2610/00; F01N2610/03; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
164 words
An auxiliary heating system for a motor vehicle with an internal combustion engine, comprising: a catalytic converter housing having an upstream direction and a downstream direction relative to flow of exhaust gas therethrough; an emission control catalyst located in the converter housing, wherein the emission control catalyst has an exhaust inlet surface and an exhaust outlet surface and contains multiple exhaust gas flow paths defined between the inlet surface and the outlet surface; a heat exchanger engaged with the converter housing, wherein the heat exchanger has a heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from at least one of the inlet surface or the outlet surface of the emission control catalyst; and a fuel/air mixture injector for injecting a fuel/air mixture into the converter housing, wherein a ratio of a surface area of the catalyst exchanging radiated heat with the heat exchange surface to a remaining surface area of the catalyst ranges from 0.5 to 100.
Claim 2
Dependent Claim
164 words
An auxiliary heating system for a motor vehicle with an internal combustion engine, comprising: a catalytic converter housing having an upstream direction and a downstream direction relative to flow of exhaust gas therethrough; an emission control catalyst located in the converter housing, wherein the emission control catalyst has an exhaust inlet surface and an exhaust outlet surface and contains multiple exhaust gas flow paths defined between the inlet surface and the outlet surface; a heat exchanger engaged with the converter housing, wherein the heat exchanger has a heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from at least one of the inlet surface or the outlet surface of the emission control catalyst; and a fuel/air mixture injector for injecting a fuel/air mixture into the converter housing, wherein a ratio of a surface area of the catalyst exchanging radiated heat with the heat exchange surface to a remaining surface area of the catalyst ranges from 0.5 to 100.
Claim 3
Dependent Claim
16 words
The auxiliary heating system according to claim 1 wherein said ratio is from 2 to 10.
Claim 4
Dependent Claim
16 words
The auxiliary heating system, in accordance with claim 1, wherein the injector has an ignition device.
Claim 5
Dependent Claim
19 words
The auxiliary heating system, in accordance with claim 1, wherein the heat exchanger includes an exhaust gas/water heat exchanger.
Claim 6
Dependent Claim
11 words
An automotive vehicle having the auxiliary heating system of claim 1.
Claim 7
Dependent Claim
19 words
The auxiliary heating system in accordance with claim 1, wherein the heat exchanger is an exhaust gas/air heat exchanger.
Claim 8
Dependent Claim
30 words
The auxiliary heating system in accordance with claim 1, wherein the heat exchange surface is arranged to freely exchange radiated heat from the inlet surface of the emission control catalyst.
Claim 9
Dependent Claim
30 words
The auxiliary heating system in accordance with claim 1, wherein the heat exchange surface is arranged to freely exchange radiated heat from the outlet surface of the emission control catalyst.
Claim 10
Dependent Claim
24 words
The auxiliary heating system in accordance with claim 1, wherein the heat exchanger provides heat to warm a passenger compartment of the motor vehicle.
Claim 11
Dependent Claim
11 words
An automotive vehicle having the auxiliary heating system of claim 9.
Claim 12
Dependent Claim
191 words
An auxiliary heating system for a motor vehicle with an internal combustion engine, comprising: a catalytic converter housing having an upstream direction and a downstream direction relative to flow of exhaust gas therethrough; an emission control catalyst located in the converter housing, wherein the emission control catalyst has an exhaust inlet surface and an exhaust outlet surface and contains multiple exhaust gas flow paths defined between the inlet surface and the outlet surface; a heat exchange means engaged with the converter housing, wherein the heat exchange means includes: (a) a first heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from the inlet surface of the emission control catalyst, and (b) a second heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from the outlet surface of the emission control catalyst; and a fuel/air mixture injector for injecting a fuel/air mixture into the converter housing, wherein a ratio of a surface area of the catalyst exchanging radiated heat with the first and second heat exchange surfaces to a remaining surface area of the catalyst ranges from 0.5 to 100.
Claim 13
Dependent Claim
191 words
An auxiliary heating system for a motor vehicle with an internal combustion engine, comprising: a catalytic converter housing having an upstream direction and a downstream direction relative to flow of exhaust gas therethrough; an emission control catalyst located in the converter housing, wherein the emission control catalyst has an exhaust inlet surface and an exhaust outlet surface and contains multiple exhaust gas flow paths defined between the inlet surface and the outlet surface; a heat exchange means engaged with the converter housing, wherein the heat exchange means includes: (a) a first heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from the inlet surface of the emission control catalyst, and (b) a second heat exchange surface which exchanges heat with the exhaust gas and freely exchanges radiated heat from the outlet surface of the emission control catalyst; and a fuel/air mixture injector for injecting a fuel/air mixture into the converter housing, wherein a ratio of a surface area of the catalyst exchanging radiated heat with the first and second heat exchange surfaces to a remaining surface area of the catalyst ranges from 0.5 to 100.
Claim 14
Dependent Claim
16 words
The auxiliary heating system according to claim 11, wherein said ratio is from 2 to 10.
Claim 15
Dependent Claim
15 words
The auxiliary heating system according to claim 11, wherein the injector has an ignition device.
Claim 16
Dependent Claim
20 words
The auxiliary heating system in accordance with claim 11, wherein the heat exchange means includes an exhaust gas/water heat exchanger.
Claim 17
Dependent Claim
20 words
The auxiliary heating system in accordance with claim 11, wherein the heat exchange means includes an exhaust gas/air heat exchanger.
Claim 18
Dependent Claim
25 words
The auxiliary heating system in accordance with claim 11, wherein the heat exchange means provides heat to warm a passenger compartment of the motor vehicle.
Claim 19
Dependent Claim
11 words
An automotive vehicle having the auxiliary heating system of claim 16.
Claim 20
Dependent Claim
11 words
An automotive vehicle having the auxiliary heating system of claim 11.
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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) | 2002-08-09 | 2003-02-08 | 2003-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-09 | 2007-02-08 | 2007-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-09 | 2011-02-08 | 2011-08-10 | $7700.00 | Window Closed / Lapsed |