Patent US4913145B1 successfully refreshed from Google Patents.
US6832475B2
Expired / Lapsed
US
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Combustion gas purifier and internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 2001-01-19
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Granted: 2004-12-21
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Expires: 2021-01-19
Abstract
Abstract A small capacity pre-catalytic system ( 34 ) is disposed immediately downstream of an exhaust port ( 18 ), and a large capacity main catalytic system ( 35 ) is disposed immediately downstream of the pre-catalytic system ( 34 ). The pre-catalytic system ( 34 ) includes finely divided catalyst supports ( 48 ), and a third stage heat exchanger (H 3 ) is disposed between these catalyst supports ( 48 ) so that a heat transfer tube ( 49 ) is bent in a zigzag manner. Fourth stage and fifth stage heat exchangers (H 4 , H 5 ) are disposed on the upstream side, in the flow of the exhaust gas, of the pre-catalytic system ( 34 ), and first and second stage heat exchangers (H 1 , H 2 ) are disposed on the downstream side, in the flow of the exhaust gas, of the main catalytic system ( 35 ). Water is made to flow through the first stage heat exchanger (H 1 ) to the fifth heat exchanger (H 5 ) in a direction opposite to that in which the exhaust gas flows, thereby exchanging heat with the exhaust gas. This allows the catalyst temperature to be actively controlled within the optimal temperature range without degrading the energy efficiency of the entire system.
Inventors
- 👤 Hiroyuki Tanaka
- 👤 Seiji Nishimoto
- 👤 Haruhiko Komatsu
- 👤 Tsuneo Endoh
- 👤 Tsuyoshi Baba
- 👤 Masashi Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:26
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/065; F01K23/10; F01N13/00; F01N13/009; F01N13/0093; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2882; F01N3/2889; F01N5/00; F01N5/02; B; B60; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/48; F01N2240/00; F01N2240/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/60; Y02T10/62
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
156 words
A combustion gas purification system wherein a catalytic system that purifies a combustion gas is disposed in an exhaust passage guiding the combustion gas from a combustion system, and at least one part of the catalytic system is provided with temperature adjustment means for adjusting the temperature thereof, wherein the temperature adjustment means has a heat transfer tube through which an operating medium flows and the at least one part of the catalytic system has a catalyst support which is placed in direct contact and integrated with the heat transfer tube of the temperature adjustment means, and the heat transfer tube and the catalyst support are brought into direct contact with the combustion gas at a same position along a flow of the combustion gas, whereby the temperature adjustment means operates to recover thermal energy of the combustion gas and the operation of the temperature adjustment means depends on a temperature condition of the operating medium.
Claim 2
Dependent Claim
156 words
A combustion gas purification system wherein a catalytic system that purifies a combustion gas is disposed in an exhaust passage guiding the combustion gas from a combustion system, and at least one part of the catalytic system is provided with temperature adjustment means for adjusting the temperature thereof, wherein the temperature adjustment means has a heat transfer tube through which an operating medium flows and the at least one part of the catalytic system has a catalyst support which is placed in direct contact and integrated with the heat transfer tube of the temperature adjustment means, and the heat transfer tube and the catalyst support are brought into direct contact with the combustion gas at a same position along a flow of the combustion gas, whereby the temperature adjustment means operates to recover thermal energy of the combustion gas and the operation of the temperature adjustment means depends on a temperature condition of the operating medium.
Claim 3
Dependent Claim
19 words
The combustion gas purification system according to claim 1 , wherein the temperature adjustment means is a heat exchanger.
Claim 4
Dependent Claim
30 words
The combustion gas purification system according to claim 1 , wherein the catalytic system provided with the temperature adjustment means is positioned on an upstream side of the exhaust passage.
Claim 5
Dependent Claim
35 words
The combustion gas purification system according to claim 1 , wherein the temperature adjustment means also controls the temperature of a part of the catalytic system other than said one part of the catalytic system.
Claim 6
Dependent Claim
36 words
The combustion gas purification system according to claim 1 , wherein temperature adjustment means for adjusting the temperature of the combustion gas is provided in the exhaust passage on an upstream side of the catalytic system.
Claim 7
Dependent Claim
26 words
The combustion gas purification system according to claim 5 , wherein the temperature adjustment means for adjusting the temperature of the gas is a heat exchanger.
Claim 8
Dependent Claim
25 words
The combustion gas purification system according to claim 1 , wherein the at least one part of the catalytic system is formed from a metal.
Claim 9
Dependent Claim
38 words
The combustion gas purification system according to claim 1 , wherein a plurality of sheets of catalyst support are provided as said catalyst support and a plurality of heat transfer tubes are provided as said heat transfer tube.
Claim 10
Dependent Claim
54 words
The combustion gas purification system according to claim 1 , wherein the operating medium of the temperature adjustment means flows in a passage and the combustion gas in the exhaust passage flows in a direction substantially opposite to that of a flow of the operating medium in the passage of the temperature adjustment means.
Claim 11
Dependent Claim
45 words
The internal combustion engine according to claim 1 , wherein the temperature adjustment means is constructed to have a passage cross-sectional area that is large on an upstream side of the flow of combustion gas near the combustion system and small on a downstream side.
Claim 12
Dependent Claim
156 words
An internal combustion engine comprising in an exhaust passage, an exhaust gas purification system that purifies exhaust gas and a heat exchanger that exchanges heat with the exhaust gas, wherein the heat exchanger has a heat transfer tube through which an operating medium flows and at least one part of the exhaust gas purification system has an exhaust gas purifying element support which is placed in direct contact and integrated with the heat transfer tube of at least one part of the heat exchanger, and the heat transfer tube and the exhaust gas purifying element support are brought into direct contact with the exhaust gas at a same position along a flow of the exhaust gas so as to be able to exchange heat with each other, whereby the heat exchanger operates to recover thermal energy of the exhaust gas and the operation of the heat exchanger depends on a temperature condition of the operating medium.
Claim 13
Dependent Claim
156 words
An internal combustion engine comprising in an exhaust passage, an exhaust gas purification system that purifies exhaust gas and a heat exchanger that exchanges heat with the exhaust gas, wherein the heat exchanger has a heat transfer tube through which an operating medium flows and at least one part of the exhaust gas purification system has an exhaust gas purifying element support which is placed in direct contact and integrated with the heat transfer tube of at least one part of the heat exchanger, and the heat transfer tube and the exhaust gas purifying element support are brought into direct contact with the exhaust gas at a same position along a flow of the exhaust gas so as to be able to exchange heat with each other, whereby the heat exchanger operates to recover thermal energy of the exhaust gas and the operation of the heat exchanger depends on a temperature condition of the operating medium.
Claim 14
Dependent Claim
42 words
The internal combustion engine according to claim 11 , wherein stirring means for stirring the flow of the exhaust gas is provided on an upstream side of the section where the exhaust gas purification system and the heat exchanger are in contact.
Claim 15
Dependent Claim
26 words
The internal combustion engine according to claim 11 , wherein the at least one part of the exhaust gas purification system is formed from a metal.
Claim 16
Dependent Claim
36 words
The internal combustion engine according to claim 11 , wherein a plurality of corrugated metal supports are provided as said catalyst support and a plurality of heat transfer tubes are proved as said heat transfer tube.
Claim 17
Dependent Claim
32 words
The internal combustion engine according to claim 14 , wherein the plurality of heat transfer tubes are concentric with and disposed alternately with the plurality of metal supports at a contact site.
Claim 18
Dependent Claim
36 words
The internal combustion engine according to claim 11 , wherein the exhaust gas in the exhaust passage flows in a direction substantially opposite to that of a flow of the operating medium in the heat exchanger.
Claim 19
Dependent Claim
45 words
The internal combustion engine according to claim 11 , wherein the heat exchanger is constructed to have a passage cross-sectional area that is large on an upstream side of the flow of the exhaust gas near a combustion chamber and small on a downstream side.
Claim 20
Dependent Claim
191 words
A combustion gas purification system wherein a catalytic system that purifies a combustion gas is disposed in an exhaust passage guiding the combustion gas from a combustion system, and at least one part of the catalytic system is provided with temperature adjustment means for adjusting the temperature thereof, wherein the temperature adjustment means uses an operating medium and the at least one part of the catalytic system is integrated with, the temperature adjustment means so that components of the temperature adjustment means surround components of the at least one part of the catalytic system at a contact site, whereby the temperature adjustment means operates to recover thermal energy of the combustion gas and the operation of the temperature adjustment mean depends on a temperature condition of the operating medium, wherein the components of the at least one catalytic system include a plurality of sheets of catalyst support and the components of the temperature adjustment means include a plurality of heat transfer tubes; and wherein the plurality of heat transfer tubes are formed in a zigzag shape and are interlaced with the plurality of sheets of catalyst support at the contact site.
Claim 21
Dependent Claim
191 words
A combustion gas purification system wherein a catalytic system that purifies a combustion gas is disposed in an exhaust passage guiding the combustion gas from a combustion system, and at least one part of the catalytic system is provided with temperature adjustment means for adjusting the temperature thereof, wherein the temperature adjustment means uses an operating medium and the at least one part of the catalytic system is integrated with, the temperature adjustment means so that components of the temperature adjustment means surround components of the at least one part of the catalytic system at a contact site, whereby the temperature adjustment means operates to recover thermal energy of the combustion gas and the operation of the temperature adjustment mean depends on a temperature condition of the operating medium, wherein the components of the at least one catalytic system include a plurality of sheets of catalyst support and the components of the temperature adjustment means include a plurality of heat transfer tubes; and wherein the plurality of heat transfer tubes are formed in a zigzag shape and are interlaced with the plurality of sheets of catalyst support at the contact site.
References Cited (Backward Citations)
US3236044A
Cited
JPS59120710A
Cited
JPS6093110A
Cited
JPS6185523A
Cited
US4685291A
Cited
JPS6336619A
Cited
US5033264A
Cited
US5085049A
Cited
JPH0544445A
Cited
JPH0693110A
Cited
JPH05179942A
Cited
US5398747A
Cited
JPH06336619A
Cited
JPH06185523A
Cited
WO1995020721A1
Cited
JPH0868318A
Cited
US5899063A
Cited
US5603215A
Cited
US5857324A
Cited
JPH09272328A
Cited
US6253548B1
Cited
DE19746658A1
Cited
JPH11166410A
Cited
US5987885A
Cited
US5983628A
Cited
US6422007B1
Cited
US6151891A
Cited
US6203764B1
Cited
EP1033481A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-12-21 | 2008-06-21 | 2008-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-12-21 | 2012-06-21 | 2012-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-12-21 | 2016-06-21 | 2016-12-21 | $7700.00 | Window Closed / Lapsed |