US3893429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stratified charge rotary engine with carburetor fuel control
Assignee: Rotary Power International Inc
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Filing: 1973-12-12
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Granted: 1975-07-08
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Expires: 1993-12-12
Abstract
Abstract A rotary combustion engine designed for operation as a stratified-charge engine by providing the engine with two intake passages, one an unthrottled passage for air only and the other for a very-rich, carburetor-controlled, fuel-air mixture such that the over-all charge is relatively lean. The two intake passages are arranged so that the fuel-rich mixture occupies the trailing portion of each engine working chamber when the mixture in the chamber is ignited and the spark plug for initiating combustion is disposed so that it fires in this fuel-rich region.
Inventors
- 👤 Charles Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:49
CPC Classifications
F; F02; F02B; F02B53/00; F02B53/02; F02B1/00; F02B1/02; F02B1/04; F02B2053/005; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A rotary combustion engine comprising: a. an outer body having a peripheral wall and axially-spaced side walls defining an internal cavity therebetween and also having first and second intake ports and an exhaust port opening into said cavity with the inner surface of said peripheral wall having a multi-lobe profile; b. a shaft coaxial with said outer body cavity and having an eccentric portion; c. an inner body of generally polygonal profile journaled on said eccentric portion for relative rotation within said outer body, the apex portions of said inner body having sealing cooperation with said peripheral surface to define a plurality of working chambers which vary in volume in response to said relative rotation and the communication of said ports with said chambers being controlled by said relative rotation; d. a passageway for supplying air only through said first intake port into said working chambers, e. a passageway for supplying a fuel-rich mixture through said second intake port into said working chambers, and f. said two intake ports being so shaped and positioned that the first intake port opens to a working chamber before the second intake port and closes before the second port whereby the trailing portion of each working chamber is supplied with a relatively fuel-rich mixture.
Claim 2
Dependent Claim
210 words
A rotary combustion engine comprising: a. an outer body having a peripheral wall and axially-spaced side walls defining an internal cavity therebetween and also having first and second intake ports and an exhaust port opening into said cavity with the inner surface of said peripheral wall having a multi-lobe profile; b. a shaft coaxial with said outer body cavity and having an eccentric portion; c. an inner body of generally polygonal profile journaled on said eccentric portion for relative rotation within said outer body, the apex portions of said inner body having sealing cooperation with said peripheral surface to define a plurality of working chambers which vary in volume in response to said relative rotation and the communication of said ports with said chambers being controlled by said relative rotation; d. a passageway for supplying air only through said first intake port into said working chambers, e. a passageway for supplying a fuel-rich mixture through said second intake port into said working chambers, and f. said two intake ports being so shaped and positioned that the first intake port opens to a working chamber before the second intake port and closes before the second port whereby the trailing portion of each working chamber is supplied with a relatively fuel-rich mixture.
Claim 3
Dependent Claim
56 words
A rotary combustion engine as claimed in claim 1 and in which said two intake ports are each formed in a side wall of the outer body with said second intake port having at least a portion disposed circumferentially beyond said first intake port in the direction of inner body rotation relative to the outer body.
Claim 4
Dependent Claim
28 words
A rotary combustion engine as claimed in claim 1 in which the passage for the first mentioned intake port is characterized by the absence of any throttle valve.
Claim 5
Dependent Claim
57 words
A rotary combustion engine as claimed in claim 1 and including an igniter mounted on the housing at a position so that at the time the igniter is to be energized it is located adjacent to said fuel-rich trailing portion of the adjacent working chamber when said chamber is positioned slightly short of its minimum volume position.
Claim 6
Dependent Claim
28 words
A rotary combustion engine as claimed in claim 4 in which the igniter opens into the engine cavity from one of the side walls of the outer body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |