US6883325B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of utilizing waste heat in turbocharger unit of an internal combustion engine and internal combustion engine arrangement
Assignee: Wartsila Technology Oy AB
•
Filing: 2001-04-10
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Granted: 2005-04-26
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Expires: 2021-04-10
Abstract
Abstract Method of utilizing waste heat in a turbocharger unit of an internal combustion engine unit having means for recovering heat from the combustion process, the engine unit comprising a turbocharger unit adapted to feed pressurized combustion air to the engine and to receive exhaust gases from the engine, wherein the means for recovering heat is producing steam, which is generated using waste heat from the engine and wherein the steam is injected to the turbocharger unit and the energy of steam is at least partially recovered in the turbocharger. The invention relates also to an internal combustion engine arrangement which comprises means for recovering heat from the combustion process and a turbocharger unit adapted to feed pressurized combustion air to the engine and to receive exhaust gases from the engine. The turbocharger unit is provided with a steam injection arrangement connected with the means for recovering heat.
Inventors
- 👤 Jerzy Chomiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:48
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/065; F01N; F01N5/00; F01N5/02; F02B39/00; F02B39/02; F02B39/08; F02B39/085; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
85 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, and injecting steam generated by the steam generator into a compressor of the turbocharger unit via a steam injection arrangement provided in the turbocharger unit.
Claim 2
Independent Claim
85 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, and injecting steam generated by the steam generator into a compressor of the turbocharger unit via a steam injection arrangement provided in the turbocharger unit.
Claim 3
Dependent Claim
51 words
A method according to claim 1 , wherein the compressor has an impeller with a tip section and the method comprises injecting the steam at the tip section of the impeller through a plurality of nozzles so that a considerable portion of the steam energy is used to drive the impeller.
Claim 4
Dependent Claim
67 words
A method according to claim 1 , wherein the compressor includes an impeller and has an inlet for admitting air to the compressor and the method comprises injecting the steam tangentially into the inlet of the compressor close to the impeller so that mixing of steam with the air upstream of the impeller is minimized and the steam forms a layer that rotates and drives the impeller.
Claim 5
Dependent Claim
18 words
A method according to claim 1 , comprising injecting the steam into the turbocharger through a supersonic nozzle.
Claim 6
Dependent Claim
41 words
A method according to claim 1 , comprising injecting steam generated by the steam generator into the turbocharger unit at a high pressure region of a turbine of the turbocharger unit via a steam injection arrangement provided in the turbocharger unit.
Claim 7
Dependent Claim
31 words
A method according to claim 1 , comprising controlling the rate of injection of steam by a closed loop control system that keeps the exhaust gases at a pre-set temperature level.
Claim 8
Dependent Claim
24 words
A method according to claim 1 , wherein the mass of the steam is between 10 to 20% of the mass of combustion air.
Claim 9
Dependent Claim
20 words
A method according to claim 1 , wherein the energy of steam is at least partially recovered in the turbocharger.
Claim 10
Independent Claim
113 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, and injecting steam generated by the steam generator into the turbocharger unit at a high pressure region of a turbine of the turbocharger unit via a steam injection arrangement provided in the turbocharger unit so that mixing of steam with the exhaust gases is minimized and steam energy is recovered in the turbine.
Claim 11
Independent Claim
113 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, and injecting steam generated by the steam generator into the turbocharger unit at a high pressure region of a turbine of the turbocharger unit via a steam injection arrangement provided in the turbocharger unit so that mixing of steam with the exhaust gases is minimized and steam energy is recovered in the turbine.
Claim 12
Dependent Claim
18 words
A method according to claim 9 , comprising injecting the steam into the turbocharger through a supersonic nozzle.
Claim 13
Dependent Claim
31 words
A method according to claim 9 , comprising controlling the rate of injection of steam by a closed loop control system that keeps the exhaust gases at a pre-set temperature level.
Claim 14
Dependent Claim
24 words
A method according to claim 9 , wherein the mass of the steam is between 10 to 20% of the mass of combustion air.
Claim 15
Dependent Claim
20 words
A method according to claim 9 , wherein the energy of steam is at least partially recovered in the turbocharger.
Claim 16
Independent Claim
105 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, injecting steam generated by the steam generator into the turbocharger unit via a steam injection arrangement provided in the turbocharger unit, and controlling the rate of injection of steam by a closed loop control system that keeps the exhaust gases at a pre-set temperature level.
Claim 17
Independent Claim
105 words
A method of operating an internal combustion engine unit that comprises a turbocharger unit which feeds pressurized combustion air to the engine and receives exhaust gases from the engine, and a steam generator for generating steam by recovering heat from the combustion process, said method comprising: using the steam generator to generate steam by recovering waste heat from the engine, injecting steam generated by the steam generator into the turbocharger unit via a steam injection arrangement provided in the turbocharger unit, and controlling the rate of injection of steam by a closed loop control system that keeps the exhaust gases at a pre-set temperature level.
Claim 18
Dependent Claim
18 words
A method according to claim 14 , comprising injecting the steam into the turbocharger through a supersonic nozzle.
Claim 19
Dependent Claim
24 words
A method according to claim 14 , wherein the mass of the steam is between 10 to 20% of the mass of combustion air.
Claim 20
Dependent Claim
20 words
A method according to claim 14 , wherein the energy of steam is at least partially recovered in the turbocharger.
Claim 21
Dependent Claim
31 words
A method according to claim 14 , comprising injecting steam into both a high pressure region of a turbine of the turbocharger unit and into a compressor of the turbocharger unit.
Claim 22
Dependent Claim
73 words
An internal combustion engine comprising: a steam generator for recovering heat from the combustion process, a turbocharger unit adapted to feed pressurised combustion air to the engine, the turbocharger unit including a turbine for receiving exhaust gases from the engine and having a high-pressure region, and a steam injection arrangement connected with the steam generator, wherein the steam injection arrangement is provided in the high-pressure region of the turbine of the turbocharger unit.
Claim 23
Dependent Claim
73 words
An internal combustion engine comprising: a steam generator for recovering heat from the combustion process, a turbocharger unit adapted to feed pressurised combustion air to the engine, the turbocharger unit including a turbine for receiving exhaust gases from the engine and having a high-pressure region, and a steam injection arrangement connected with the steam generator, wherein the steam injection arrangement is provided in the high-pressure region of the turbine of the turbocharger unit.
Claim 24
Dependent Claim
39 words
An internal combustion engine according to claim 19 , wherein the turbocharger unit includes a compressor and the engine further comprises a steam injection arrangement connected with the steam generator and provided in the compressor of the turbocharger unit.
Claim 25
Dependent Claim
65 words
An internal combustion engine comprising: a steam generator for recovering heat from the combustion process, a turbocharger unit adapted to feed pressurised combustion air to the engine and to receive exhaust gases from the engine, the turbocharger unit including a compressor, and a steam injection arrangement connected with the steam generator, wherein the steam injection arrangement is provided in the compressor of the turbocharger unit.
Claim 26
Dependent Claim
65 words
An internal combustion engine comprising: a steam generator for recovering heat from the combustion process, a turbocharger unit adapted to feed pressurised combustion air to the engine and to receive exhaust gases from the engine, the turbocharger unit including a compressor, and a steam injection arrangement connected with the steam generator, wherein the steam injection arrangement is provided in the compressor of the turbocharger unit.
References Cited (Backward Citations)
US3137477A
Cited
US3948053A
Cited
DE2630456A1
Cited
JPS5666404A
Cited
JPS57171017A
Cited
JPS5853607A
Cited
US4513572A
Cited
US4684321A
Cited
JPS627905A
Cited
SU1701956A2
Cited
SU1728513A2
Cited
JPH06108865A
Cited
JPH06346745A
Cited
US6089020A
Cited
US6119457A
Cited
JPH1113547A
Cited
DE19742031A1
Cited
EP1028233A2
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2008-04-25 | 2008-10-25 | 2009-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-04-25 | 2012-10-25 | 2013-04-26 | $3760.00 | Window Closed / Lapsed |
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