US3718000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fueled engine with temperature switchover
Assignee: Individual
•
Filing: 1971-06-01
•
Granted: 1973-02-27
•
Expires: 1991-06-01
Abstract
Abstract A duel fueled motor using a liquid fuel such as gasoline and a gaseous fuel such as LPG or pressurized natural gas with one or two exhaust treating devices in the exhaust system that operate efficiently when above a selected temperature in treating exhaust from gasoline powered operation, a thermally sensitive controlled changeover from gas to gasoline when the treater reaches a desired temperature and switches back to gas fuel when below a desired temperature.
Inventors
- 👤 B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
F; F02; F02M; F02M13/00; F02M13/08; F02B; F02B11/00; F02B11/02; F02D; F02D19/00; F02D19/06; F02D19/0602; F02D19/0613; F02D19/0615; F02D19/0626; F02D19/0628; F02D19/0631; F02D19/0639; F02D19/0642; F02D19/0647; F02D2200/00; F02D2200/02; F02D2200/08; F02D2200/0802; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
An engine having dual air and fuel mixing devices for feeding said engine, said mixing devices adapted to feed liquid fuel such as gasoline or gas fuel, such as LPG or gas from a pressurized container, means for switching the feeding of the fuel to the engine from one mixing device to the other, an exhaust system, a treatment device in said exhaust system, said treatment device operating better above a desired temperature than below said temperature, a temperature sensing device disposed to sense the temperature of said treatment device, and means operated by said temperature sensing device for controlling the switching means to cause the feeding of said engine with gas fuel when the treatment device is operating below a selected temperature and to automatically cause the feeding of said engine with gasoline when said treatment device is above said temperature said means operateD by the temperature sensing device also controlling the switching back to gas fueled operation of said engine when said treatment is below the desired temperature.
Claim 2
Dependent Claim
170 words
An engine having dual air and fuel mixing devices for feeding said engine, said mixing devices adapted to feed liquid fuel such as gasoline or gas fuel, such as LPG or gas from a pressurized container, means for switching the feeding of the fuel to the engine from one mixing device to the other, an exhaust system, a treatment device in said exhaust system, said treatment device operating better above a desired temperature than below said temperature, a temperature sensing device disposed to sense the temperature of said treatment device, and means operated by said temperature sensing device for controlling the switching means to cause the feeding of said engine with gas fuel when the treatment device is operating below a selected temperature and to automatically cause the feeding of said engine with gasoline when said treatment device is above said temperature said means operateD by the temperature sensing device also controlling the switching back to gas fueled operation of said engine when said treatment is below the desired temperature.
Claim 3
Independent Claim
102 words
An apparatus for operating a dual fueled internal combustion engine having an intake manifold and an exhaust system, a treatment device in the exhaust system, a thermally sensitive device disposed to sense the temperature of said treatment device, automatic means responsive to said device for shifting said engine to operate on a gaseous fuel when said treatment device is below a selected temperature as sensed by said device, said device controlling the automatic means to shift said engine to operate on a liquid fuel from operating on said gaseous fuel when said device is above a selected temperature of said treatment device.
Claim 4
Independent Claim
102 words
An apparatus for operating a dual fueled internal combustion engine having an intake manifold and an exhaust system, a treatment device in the exhaust system, a thermally sensitive device disposed to sense the temperature of said treatment device, automatic means responsive to said device for shifting said engine to operate on a gaseous fuel when said treatment device is below a selected temperature as sensed by said device, said device controlling the automatic means to shift said engine to operate on a liquid fuel from operating on said gaseous fuel when said device is above a selected temperature of said treatment device.
Claim 5
Dependent Claim
50 words
A device as defined in claim 2, in which the power means to operate said automatic means for shifting from operation of said engine on one fuel to the other fuel, the power for energizing the power means being derived from the suction from said intake manifold of said engine.
Claim 6
Dependent Claim
45 words
A device as defined in claim 2, including electrically powered motors for operating the automatic means for shifting from operation of said engine on one fuel to operation on the other fuel, said motors being controlled by said sensing device associated with said treatment device.
References Cited (Backward Citations)
US2675793A
Cited
US2004403A
Cited
US2315882A
Cited
US2339988A
Cited
US2381304A
Cited
US3366194A
Cited
US3540419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |