US6990805B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery device for internal combustion engine
Assignee: Honda Motor Co Ltd
•
Filing: 2000-12-08
•
Granted: 2006-01-31
•
Expires: 2020-12-08
Abstract
Abstract A waste heat recovering device for an internal combustion engine includes: an internal combustion engine; and an evaporator into which an exhaust gas of the internal combustion engine is introduced as a high temperature fluid. An exhaust gas inlet of the evaporator is placed adjacent to an exhaust valve of the internal combustion engine. Thus, there can be provided a waste heat recovering device having a high waste heat recovery rate.
Inventors
- 👤 Naoki Ohta
- 👤 Tsuneo Endoh
- 👤 Atsushi Baba
- 👤 Tsutomu Takahashi
- 👤 Masashi Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
F; F01; F01N; F01N5/00; F01N5/02; F02; F02G; F02G5/00; F02G5/02; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1807; F01N13/00; F01N13/08; F01N13/10; Y; Y02; Y02E; Y02E20/00; Y02E20/30; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
121 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, wherein said heat exchanger forms at least a part of said exhaust pipe.
Claim 2
Dependent Claim
121 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, wherein said heat exchanger forms at least a part of said exhaust pipe.
Claim 3
Dependent Claim
20 words
The waste heat recovering device according to claim 1 , wherein an insulating layer is provided surrounding said heat exchanger.
Claim 4
Dependent Claim
62 words
The waste heat recovery device according to claim 1 , wherein the exhaust valve penetrates through a small diameter cylinder portion of the heat exchanger and passes through the exhaust gas inlet of the heat exchanger, wherein the small diameter cylinder portion of the heat exchanger expands into a tapered cylinder portion, which in turn expands into a large diameter cylinder portion.
Claim 5
Dependent Claim
30 words
The waste heat recovery device according to claim 3 , wherein the small diameter cylinder portion projects in a bent manner from the tapered cylinder portion toward the valve seat.
Claim 6
Dependent Claim
19 words
The waste heat recovery device according to claim 3 , wherein the heat exchanger is made of stainless steel.
Claim 7
Dependent Claim
45 words
The waste heat recovery device according to claim 3 , wherein the small diameter cylinder portion and the tapered cylinder portion extending from the exhaust valve are surrounded by a cavity, the cavity separating the cylinder block and the cylinder head from the heat exchanger.
Claim 8
Dependent Claim
31 words
The waste heat recovery device according to claim 1 , wherein conduits are provided within the heat exchanger for carrying supply water and raised temperature water vapor generated by the water.
Claim 9
Dependent Claim
31 words
The waste heat recovery device according to claim 7 , wherein some of the conduits are disposed on an outer side of the small diameter cylinder portion of the heat exchanger.
Claim 10
Dependent Claim
49 words
The waste heat recovery device according to claim 3 , wherein elastic seal members with mating faces are provided around the exhaust valve where exhaust valve penetrates through the small diameter cylinder portion, in order to form a seal between the small diameter cylinder portion and the exhaust valve.
Claim 11
Dependent Claim
46 words
The waste heat recovery device according to claim 1 , wherein the exhaust gas inlet of said heat exchanger projects into a tapered hole surrounding said exhaust valve of said internal combustion engine, with a seal being provided between the tapered hole and the heat exchanger.
Claim 12
Dependent Claim
161 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein the exhaust valve penetrates through a small diameter cylinder portion of the heat exchanger and passes through the exhaust gas inlet of the heat exchanger, wherein the small diameter cylinder portion of the heat exchanger expands into a tapered cylinder portion, which in turn expands into a large diameter cylinder portion.
Claim 13
Dependent Claim
161 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein the exhaust valve penetrates through a small diameter cylinder portion of the heat exchanger and passes through the exhaust gas inlet of the heat exchanger, wherein the small diameter cylinder portion of the heat exchanger expands into a tapered cylinder portion, which in turn expands into a large diameter cylinder portion.
Claim 14
Dependent Claim
30 words
The waste heat recovery device according to claim 11 , wherein the small diameter cylinder portion projects in a bent manner from the tapered cylinder portion toward the valve seat.
Claim 15
Dependent Claim
19 words
The waste heat recovery device according to claim 11 , wherein the heat exchanger is made of stainless steel.
Claim 16
Dependent Claim
45 words
The waste heat recovery device according to claim 11 , wherein the small diameter cylinder portion and the tapered cylinder portion extending from the exhaust valve are surrounded by a cavity, the cavity separating the cylinder block and the cylinder head from the heat exchanger.
Claim 17
Dependent Claim
49 words
The waste heat recovery device according to claim 11 , wherein elastic seal members with mating faces are provided around the exhaust valve where exhaust valve penetrates through the small diameter cylinder portion, in order to form a seal between the small diameter cylinder portion and the exhaust valve.
Claim 18
Dependent Claim
130 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein conduits are provided within the heat exchanger for carrying supply water and raised temperature water vapor generated by the water.
Claim 19
Dependent Claim
130 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein conduits are provided within the heat exchanger for carrying supply water and raised temperature water vapor generated by the water.
Claim 20
Dependent Claim
31 words
The waste heat recovery device according to claim 16 , wherein some of the conduits are disposed on an outer side of the small diameter cylinder portion of the heat exchanger.
Claim 21
Dependent Claim
145 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein the exhaust gas inlet of said heat exchanger projects into a tapered hole surrounding said exhaust valve of said internal combustion engine, with a seal being provided between the tapered hole and the heat exchanger.
Claim 22
Dependent Claim
145 words
A waste heat recovering device for an internal combustion engine, comprising: an internal combustion engine having a combustion chamber, an exhaust pipe for guiding an exhaust gas from said combustion chamber after combustion, and an exhaust valve disposed between said combustion chamber and said exhaust pipe for opening and closing operations; and a heat exchanger disposed in said exhaust pipe downstream of said exhaust valve into which heat exchanger said exhaust gas of the combustion chamber is introduced as a high temperature fluid via said exhaust valve, wherein an exhaust gas inlet of said heat exchanger is placed adjacent to said exhaust valve of said internal combustion engine, and wherein the exhaust gas inlet of said heat exchanger projects into a tapered hole surrounding said exhaust valve of said internal combustion engine, with a seal being provided between the tapered hole and the heat exchanger.
References Cited (Backward Citations)
US4169488A
Cited
US4284055A
Cited
JPS56145407A
Cited
US4450798A
Cited
US5404844A
Cited
US6340013B1
Cited
US6178744B1
Cited
US5987885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-30 | 2009-08-01 | 2010-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-30 | 2013-08-01 | 2014-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-30 | 2017-08-01 | 2018-01-31 | $7700.00 | Window Closed / Lapsed |