US3882828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection type rotary piston engine
Assignee: Mazda Motor Corp
•
Filing: 1973-09-27
•
Granted: 1975-05-13
•
Expires: 1993-09-27
Abstract
Abstract A fuel injection type rotary piston engine has an intake port, a fuel injection nozzle and an auxiliary air port. The intake port is provided on at least one of side housings for introducing fresh air into the working chamber of the rotary engine. The fuel injection nozzle is provided on the rotor housing for injecting fuel into the working chamber. The air port is provided in the rotor housing for introducing auxiliary air into the working chamber in such a direction that the auxiliary air flow intersects the injected fuel stream.
Inventors
- 👤 Yoshinori Honiden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:49
CPC Classifications
F; F02; F02B; F02B53/00; F02B2053/005; F02B75/00; F02B75/12; F02B2075/125; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
185 words
A rotary piston type internal combustion engine comprising a casing including a rotor housing having a trochoidal inner peripheral wall surface and a pair of side housings airtightly secured to the opposite sides of said rotor housing, a polygonal rotor having apices sealingly contacting the inner peripheral surface of said rotor housing so as to provide working chambers between said rotor and said rotor housing, means for rotating said rotor so as to effect volumetric changes of each working chamber through intake, compression, combustion and exhaust strokes, intake port means provided in at least one of said side housings for introducing fresh air into the working chamber which is in the intake stroke, fuel injection means provided in said rotor housing for injecting fuel into the working chamber which is in the intake stroke, and means provided in the rotor housing for introducing auxiliary air into said working chamber, said means for introducing auxiliary air being spaced apart from said fuel injection means on said rotor housing and being positioned so that the auxiliary air flow intersects the injected fuel stream within said working chamber.
Claim 2
Dependent Claim
185 words
A rotary piston type internal combustion engine comprising a casing including a rotor housing having a trochoidal inner peripheral wall surface and a pair of side housings airtightly secured to the opposite sides of said rotor housing, a polygonal rotor having apices sealingly contacting the inner peripheral surface of said rotor housing so as to provide working chambers between said rotor and said rotor housing, means for rotating said rotor so as to effect volumetric changes of each working chamber through intake, compression, combustion and exhaust strokes, intake port means provided in at least one of said side housings for introducing fresh air into the working chamber which is in the intake stroke, fuel injection means provided in said rotor housing for injecting fuel into the working chamber which is in the intake stroke, and means provided in the rotor housing for introducing auxiliary air into said working chamber, said means for introducing auxiliary air being spaced apart from said fuel injection means on said rotor housing and being positioned so that the auxiliary air flow intersects the injected fuel stream within said working chamber.
Claim 3
Dependent Claim
61 words
A rotary piston type internal combustion engine in accordance with claim 1 in which said auxiliary air introducing means comprises an air conduit opening into the working chamber which is in the intake stroke so that the auxiliary air is taken into the working chamber due to the pressure difference between the atmospheric pressure and the pressure in the working chamber.
Claim 4
Dependent Claim
33 words
A rotary piston type internal combustion engine in accordance with claim 2 in which said air conduit is provided with valve means which is controlled as a function of an engine operating condition.
Claim 5
Dependent Claim
30 words
A rotary piston type internal combustion engine in accordance with claim 3 in which said valve means is controlled so as to open during light load operation of the engine.
Claim 6
Dependent Claim
30 words
A rotary piston type internal combustion engine in accordance with claim 3 in which said valve means is controlled so as to open during low speed operation of the engine.
Claim 7
Dependent Claim
31 words
A rotary piston type internal combustion engine in accordance with claim 5 in which said valve means includes a solenoid valve which is opened when the engine throttle valve is closed.
Claim 8
Dependent Claim
39 words
A rotary piston type internal combustion engine in accordance with claim 5 in which said valve means includes a pressure responsive valve which is opened when the pressure in the intake port means is reduced below a prEdetermined value.
Claim 9
Dependent Claim
43 words
A rotary piston type internal combustion engine in accordance with claim 1 in which said auxiliary air introducing means opens into the working chamber within a sectorial area defined by center of the housings and both side extremities of the intake port means.
Claim 10
Dependent Claim
25 words
A rotary piston type internal combustion engine in accordance with claim 8 in which said fuel injection means is also disposed in said sectorial area.
Claim 11
Dependent Claim
25 words
A rotary piston type internal combustion engine in accordance with claim 8 in which said fuel injection means is disposed out of said sectorial area.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |