Internal-combustion engines – Rotary – With transfer means intermediate single compression volume...
Reexamination Certificate
1999-06-22
2001-06-19
Koczo, Michael (Department: 3746)
Internal-combustion engines
Rotary
With transfer means intermediate single compression volume...
C123S230000, C123S231000, C418S186000, C418S263000
Reexamination Certificate
active
06247443
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to internal combustion engines and in particular a rotary internal combustion engine and rotary internal combustion engine cycles.
BACKGROUND OF THE INVENTION
The rotary internal combustion engine and cycle is superior in many ways to the conventional reciprocating piston-type engine. They possess fewer parts, are of low weight, simple in design, have superior breathing and therefore greater efficiency, have no valves and do not experience a reciprocating imbalance. Various designs of rotary internal combustion engines are known most of which comprise a rotor eccentrically mounted within a rotor chamber. In many, the rotor has a plurality of slots fitted with sliding vanes in order to create the working chambers of the engine as the rotor rotates within the rotor chamber. However, there are numerous shortcomings associated with the known art such as inadequate sealing between the working chambers of the engine leading to combustion gas leakage between working chambers of the engine, the premature retraction of the radially mounted members, complexity of design, inordinate frictional wear of component parts, and an inefficient conversion of chemical energy to mechanical energy.
One example of the known art is Canadian Letters Patent 1,248,029 entitled “Rotary Internal Combustion Engine” issued on Sep. 3, 1981 to Aase. The Aase patent discloses an engine which relies upon a very complex rotor design, comprising sliding cylinder sleeves within the rotor receiving members that define the working chambers of the engine. This design is very complex and hence may be very expensive to manufacture. Furthermore there are a large number of moving parts in the engine design all of which are subject to frictional wear. Finally, the size of the combustion chamber is limited and therefore the conversion of chemical fuel energy to mechanical rotational energy may be less than optimal.
The present invention seeks to overcome the disadvantages of known internal combustion rotary engines.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an improved rotary internal combustion engine and an improved rotary internal combustion engine cycle.
In accordance with one aspect of the present invention there is provided a rotary internal combustion engine comprising an engine casing within which is mounted a cylindrical rotor co-axially fixed to a drive shaft and adapted to receive a plurality of slidable and retractable vanes. The rotor is eccentrically and rotatably mounted inside a circular rotor chamber. In cross-section, the rotor chamber wall is thicker at the side at which combustion takes place to accommodate the pressures resulting from the combusting fuel/air mixture. The slidable retractable vanes are mounted in the rotor in a staggered and radial arrangement substantially forming a “Y” shape in cross-section. Cams are coupled to the sliding and retracting vanes by connecting rods to control their sliding and retracting movements. These sliding and retracting movements define the working chambers of the engine as the rotor rotates. The working chambers comprise a fuel/air mixture intake chamber, a compression chamber, a combustion chamber and an exhaust chamber.
In one embodiment of the present invention, there is provided a fuel/air mixture supply using either carburation or fuel injection means for providing a suitable fuel/air mixture to the intake and combustion chambers. The fuel/air mixture is ignited using a spark plug or compression ignition means. Conveniently, gaseous products of combustion are removed from the engine through an exhaust gas system comprising a series of interconnected orifices and ports and an intake/exhaust vane. The moving engine parts are adequately lubricated. Those portions of the engine which are in communication with each other and require to be sealed in order for the engine to operate are so sealed.
The engine also has a coolant circulating system to remove combustion heat from the engine in operation.
In accordance with another aspect of the present invention there is provided a rotary internal combustion engine cycle wherein the operation thereof is defined by the following phases: intake phase, compression phase, combustion and power phase and exhaust phase. The combustion phase occurs over at least 180 degrees of rotor rotation and as much as 200 degrees of rotation. All four phases are repeated over each cycle of 360 degrees of rotation.
Advantages of the present invention are a more efficient conversion of chemical fuel energy to mechanical energy by the increased combustion phase over at least 180 degrees of rotation; fewer mechanical parts to wear; sealing and anti-friction means to further improve the operation of the engine.
REFERENCES:
patent: 1309767 (1919-07-01), Morgan
patent: 3762375 (1973-10-01), Bentely
patent: 3865085 (1975-02-01), Stenberg
patent: 5937820 (1999-08-01), Nagata et al.
patent: 648 293 (1964-09-01), None
patent: 448226 (1948-05-01), None
patent: 1248029 (1989-01-01), None
patent: 2059416 (1971-08-01), None
patent: 2159594 (1973-06-01), None
patent: 2301666 (1974-07-01), None
patent: 595689 (1925-07-01), None
patent: 606011 (1926-02-01), None
patent: 716754 (1931-10-01), None
patent: 755096 (1933-09-01), None
Duft Walter W.
Koczo Michael
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