US3929106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber arrangement for rotary compression-ignition I.C. engines
Assignee: Bentley Motors Ltd
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Filing: 1974-10-01
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Granted: 1975-12-30
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Expires: 1994-10-01
Abstract
Abstract A rotary piston compression ignition internal combustion engine has a three sided rotor disposed in a two lobed epitrochoidal combustion chamber. A combustion recess is formed in each face of the rotor and the fuel injector of the engine is disposed so as to inject along the recess. The timing of injection is coordinated with the position of each recess as it passes the injector so as to minimize or prevent wetting of the recess walls with fuel.
Inventors
- 👤 William Murray Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:12
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/14; F02B53/00; F02B53/04; F02B2053/005; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A rotary piston compression-ignition internal combustion engine comprising: a housing defining a main chamber comprising n lobes; a shaft extending axially of the housing; a rotor defined by an (n + 1) sided piston having flanks defining its sides, said piston being eccentrically mounted on the shaft anD rotatable in the housing; a seal mounted at each apex formed between each pair of adjacent flanks of the piston; a combustion recess formed in each flank of the rotor having an end wall at its leading end extending substantially normal to the corresponding rotor flank at its intersection therewith, a substantially plane bottom wall which extends substantially at right angles to the leading end wall, and a depth which increases progressively in the direction of rotation of the rotor; and means for injecting fuel into each recess disposed in the housing and arranged to inject one or more sprays of fuel into the combustion recess, the direction of injection of the spray or sprays being essentially towards the leading end wall of the recess in the direction of rotation.
Claim 2
Dependent Claim
178 words
A rotary piston compression-ignition internal combustion engine comprising: a housing defining a main chamber comprising n lobes; a shaft extending axially of the housing; a rotor defined by an (n + 1) sided piston having flanks defining its sides, said piston being eccentrically mounted on the shaft anD rotatable in the housing; a seal mounted at each apex formed between each pair of adjacent flanks of the piston; a combustion recess formed in each flank of the rotor having an end wall at its leading end extending substantially normal to the corresponding rotor flank at its intersection therewith, a substantially plane bottom wall which extends substantially at right angles to the leading end wall, and a depth which increases progressively in the direction of rotation of the rotor; and means for injecting fuel into each recess disposed in the housing and arranged to inject one or more sprays of fuel into the combustion recess, the direction of injection of the spray or sprays being essentially towards the leading end wall of the recess in the direction of rotation.
Claim 3
Dependent Claim
40 words
A rotary piston compression-ignition internal combustion engine as claimed in claim 1, in which the housing wall adjacent the nozzle of the injection means is cut away to facilitate the passage of the spray or sprays into the combustion recess.
Claim 4
Dependent Claim
39 words
A rotary piston compression-ignition internal combustion engine as claimed in claim 1, in which the depth of each combustion recess increases progressively from zero at the lagging end of the recess in the direction of rotation of the rotor.
Claim 5
Dependent Claim
28 words
A rotary piston compression-ignition internal combustion engine as claimed in claim 1, in which each combustion recess is disposed substantially midway between the ends of the associated flank.
Claim 6
Dependent Claim
58 words
A rotary piston compression-ignition internal combustion engine as claimed in claim 1, in which timing means are provided for controlling operation of the fuel injection means in dependence upon the position of the appropriate combustion recess whereby to minimize fuel wetting of the walls of the recess at low rotor speeds and avoid it at high rotor speeds.
Claim 7
Dependent Claim
17 words
A rotary piston compression-ignition internal combustion engine as claimed in claim 1 in which n equals 2.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |