Patent US3844256A successfully refreshed from Google Patents.
US3844256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake passage-way of a rotary internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1972-10-17
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Granted: 1974-10-29
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Expires: 1992-10-17
Abstract
Abstract An intake passageway for a rotary internal combustion engine having a housing provided with an epitrochoidal internal wall defining a cavity and a rotor rotatably disposed in the cavity and having a peripheral surface with a plurality of circumferentially spaced apex portions sealingly engaging with the epitrochoidal internal wall of the housing to define a plurality of working chambers, which intake passageway includes a plurality of partitions disposed in an opening portion of the intake passageway substantially in parallel to the flow of an air-fuel mixture passing therethrough for preventing engine exhaust gases from being sucked into one of the plurality of working chambers into which the air-fuel mixture is supplied. The intake passageway further includes valve means for controlling the effective cross sectional area of the opening portion of the intake passageway.
Inventors
- 👤 Y Ishikawa
- 👤 K Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:32
CPC Classifications
F; F01; F01C; F01C20/00; F01C20/10; F01C20/14; F01C21/00; F01C21/18; F02; F02B; F02B53/00; F02B55/00; F02B55/16; F02B2730/00; F02B2730/09; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
An intake passageway for a rotary internal combustion engine having a housing provided with an epitrochoidal internal wall therein forming a cavity and a rotor rotatably disposed in said cavity, said rotor having a peripheral surface with a plurality of apex portions each of which has a radially movable apex seal sealingly engaging with the epitrochoidal internal wall of said housing to define a plurality of working chambers in said cavity, said intake passageway comprising an intake passage means formed in said housing and having an opening portion communicating with said cavity for supplying an air-fuel mixture into one of said working chambers, a plurality of partitions positioned in said opening portion of said intake passage means substantially in parallel to the flow of said air-fuel mixture passing therethrough and extending to the peripheral wall of the working chambers in working cooperation with the apex seal to prevent engine exhaust gases from other one of said working chambers from being sucked into said one of said working chambers, and a valve means for controlling an effective cross sectional area of said opening portion of said intake passage means.
Claim 2
Dependent Claim
188 words
An intake passageway for a rotary internal combustion engine having a housing provided with an epitrochoidal internal wall therein forming a cavity and a rotor rotatably disposed in said cavity, said rotor having a peripheral surface with a plurality of apex portions each of which has a radially movable apex seal sealingly engaging with the epitrochoidal internal wall of said housing to define a plurality of working chambers in said cavity, said intake passageway comprising an intake passage means formed in said housing and having an opening portion communicating with said cavity for supplying an air-fuel mixture into one of said working chambers, a plurality of partitions positioned in said opening portion of said intake passage means substantially in parallel to the flow of said air-fuel mixture passing therethrough and extending to the peripheral wall of the working chambers in working cooperation with the apex seal to prevent engine exhaust gases from other one of said working chambers from being sucked into said one of said working chambers, and a valve means for controlling an effective cross sectional area of said opening portion of said intake passage means.
Claim 3
Dependent Claim
60 words
An intake passageway as claimed in claim 1, wherein said valve means comprises a plurality of flexible valve members which are secured at one end to said plurality of partitions, respectively, and which are freely movable at the other end to open and close flow paths defined by said plurality of partitions due to pressure difference across said valve members.
Claim 4
Dependent Claim
62 words
An intake passageway as claimed in claim 1, wherein said valve means comprises a rotary valve which is mounted in the intake passageway upstream of said plurality of partitions, said rotary valve being round in cross section and having a pair of radially spaced axially extending wall portions defining therebetween a passage which is selectively brought into communication with said opening portion.
Claim 5
Dependent Claim
72 words
An intake passageway as claimed in claim 1, wherein said valve means comprises a slidable valve plate which is slidably accommodated in a recess formed in said housing and which has formed therein an aperture communicating with said intake passage means, said valve plate being held in abutting engagement with respective ends of said plurality of partitions and slidable thereon for opening and closing flow paths formed by said plurality of partitions.
Claim 6
Dependent Claim
41 words
An intake passageWay as claimed in claim 1, wherein said valve means comprises a plurality of butterfly valves which are respectively interposed in flow paths formed by said plurality of partitions and rotatable therein for opening and closing said flow paths.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |