US3961484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with power recovery turbine
Assignee: Individual
•
Filing: 1974-07-29
•
Granted: 1976-06-08
•
Expires: 1994-07-29
Abstract
Abstract Greater overall power is obtained from an internal combustion engine utilizing a power recovery turbine operated by the exhaust gases from the engine cylinders by dimensioning the stacks connecting the exhaust valve flow areas to the turbine such that each stack has a cross sectional flow area less than the cross sectional flow area of the exhaust valve when fully opened. While there results a slight increase in frictional losses in the stack and pumping losses to the piston, such losses are more than made up by the substantial decreases in throttling losses across the exhaust valve flow area during the valve opening process.
Inventors
- 👤 James L. Harp, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:41
CPC Classifications
F; F02; F02G; F02G3/00; F02G3/02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
In combination: an internal combustion engine having cylinders with given inlet and exhaust valve flow areas; a turbine coupled to the engine wherein exhaust gases are passed to said turbine to provide recovery power derived from said exhaust gases; stacks connecting the exhaust valve flow areas to said turbine; each stack having a cross sectional flow area less than the given cross sectional flow area of the exhaust valve to which it is connected; and a port for each cylinder connecting the associated exhaust stack to the exhaust outlet, said port reducing in cross sectional area between said outlet and said stack, the cross sectional flow area of each of said stacks being from 0.50 to 0.90 the given cross sectional flow area of the exhaust valve to which it is connected, said reduced stack areas permitting a quicker buildup of high pulse pressure in the stack thereby reducing throttling losses during the valve opening process.
Claim 2
Dependent Claim
156 words
In combination: an internal combustion engine having cylinders with given inlet and exhaust valve flow areas; a turbine coupled to the engine wherein exhaust gases are passed to said turbine to provide recovery power derived from said exhaust gases; stacks connecting the exhaust valve flow areas to said turbine; each stack having a cross sectional flow area less than the given cross sectional flow area of the exhaust valve to which it is connected; and a port for each cylinder connecting the associated exhaust stack to the exhaust outlet, said port reducing in cross sectional area between said outlet and said stack, the cross sectional flow area of each of said stacks being from 0.50 to 0.90 the given cross sectional flow area of the exhaust valve to which it is connected, said reduced stack areas permitting a quicker buildup of high pulse pressure in the stack thereby reducing throttling losses during the valve opening process.
References Cited (Backward Citations)
US1308373A
Cited
US1933612A
Cited
US2406656A
Cited
US3064417A
Cited
US3153318A
Cited
US3221492A
Cited
US3473322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |