US3932987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating a combustion piston engine with external combustion
Assignee: Individual
•
Filing: 1974-11-21
•
Granted: 1976-01-20
•
Expires: 1994-11-21
Abstract
Abstract A method of operating a constant pressure external combustion piston engine wherein air and liquid coolant are precompressed in one step to a pressure-temperature value at which the coolant is substantially saturated vapor.
Inventors
- 👤 Friedrich Munzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:09
CPC Classifications
F; F02; F02B; F02B47/00; F02G; F02G1/00; F02G1/02; F02G3/00; F02G3/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
54 words
A method of operating a combustion piston engine with external combustion at substantially constant pressure of an air-fuel mixture whose air content has been pre-compressed together with a liquid coolant, characterized by precompressing said air content and said coolant in one step to a pressure-temperature value at which the coolant is substantially saturated vapour.
Claim 2
Independent Claim
54 words
A method of operating a combustion piston engine with external combustion at substantially constant pressure of an air-fuel mixture whose air content has been pre-compressed together with a liquid coolant, characterized by precompressing said air content and said coolant in one step to a pressure-temperature value at which the coolant is substantially saturated vapour.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1, characterized by precompressing the air-coolant mixture to approximately 100 atm./310°C.
Claim 4
Dependent Claim
20 words
A method as defined in claim 1, characterized by providing an excess of air-coolant mixture over that required for combustion.
Claim 5
Dependent Claim
16 words
A method a defined in claim 1, characterized in that water is used as the coolant.
Claim 6
Dependent Claim
19 words
A method as defined in claim 1, characterized by discharging the precompressed air coolant mixture into a pressure reservoir.
Claim 7
Dependent Claim
28 words
A method as defined in claim 5, characterized by discharging the air coolant mixture from the pressure reservoir into the combustion chamber of the engine through a nozzle.
Claim 8
Dependent Claim
40 words
A method as defined in claim 5, characterized by compressing at least a part of the flue gases discharged from the engine and mixing said compressed flue gases with the mixture in a combustion chamber by injecting the same thereinto.
Claim 9
Dependent Claim
23 words
A method as defined in claim 7, characterized by mixing fresh air with said flue gases to be compressed before compressing the same.
Claim 10
Dependent Claim
16 words
A method as defined in claim 7, including cooling said flue gases before compressing the same.
Claim 11
Dependent Claim
29 words
A method as defined in claim 6, including compressing at least a part of flue gases discharged from the engine and collecting the same in a separate pressure reservoir.
Claim 12
Dependent Claim
27 words
A method as defined in claim 4, characterized in separating and recovering at least a portion of the coolant from the flue gases discharged from the engine.
Claim 13
Dependent Claim
21 words
A method as defined in claim 1, characterized by adding flue gases to the air fuel mixture in a combustion chamber.
Claim 14
Dependent Claim
28 words
A method as defined in claim 1, characterized by regenerating carbon dioxide from flue gases discharged from the engine and using the regenerated carbon dioxide as the coolant.
References Cited (Backward Citations)
US1302582A
Cited
FR592822A
Cited
US2805547A
Cited
US2986882A
Cited
US3013383A
Cited
US3298176A
Cited
US3577729A
Cited
US3559402A
Cited
US3708976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |