Rotary disc engine

Information

  • Patent Grant
  • 6257196
  • Patent Number
    6,257,196
  • Date Filed
    Tuesday, September 7, 1999
    25 years ago
  • Date Issued
    Tuesday, July 10, 2001
    23 years ago
  • Inventors
  • Examiners
    • Denion; Thomas
    • Trieu; Thai-Ba
    Agents
    • Oltman, Flynn & Kubler
Abstract
A rotary internal combustion engine comprising a generally cylindrical shaped rotor housing, a pair of cylindrical shaped rotary discs having inner and outer concentric members and a plurality of spaced apart vanes connecting the inner and outer concentric members and extending axially outward therefrom, a pair of substantially flat stators mounted over the open ends of the rotor housing and an injection system. The rotary discs are structured for mating engagement with one another by inserting the vanes of each rotary disc into the chambers of the other rotary disc formed by the vanes and the inner and outer members, thereby forming an interlocked rotary disc assembly structured to rotate within the rotary housing. A plurality of spark plugs protrude through spaced apart mounting holes in one of the stators and into the combustion chambers. A plurality of spaced apart exhaust ports extend through the other stator. A hollow tubular member extends out from a centrally disposed bore in each rotary disc and a free wheel embedded therein and through a centrally disposed free wheel in the corresponding stator. The free wheels are connected to a central shaft which extends through the tubular member to produce a continuous rotation in a single direction. A gear wheel, structured to mesh with the gears of a starting motor, is mounted on the end of each tubular member. A single port injection system distributes the air-fuel mixture into the combustion chambers. A plurality of water jackets ports, structured to allow a cooling medium to flow therethrough, extend axially through the outer band of the rotor housing and the first and second stators. A plurality of pick-up coils and magnetic bolts are correspondingly mounted in the stators and rotary discs to trigger the spark plug firing as the rotary discs rotate.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




The present invention relates in general to the field of rotary engines and, more particularly, to a rotary internal combustion disk engine.




2. Description of the Related Art




Rotary engines were developed to address certain limitations inherent in conventional piston driven reciprocating engines. Specifically, conventional reciprocating engines utilize a plurality of pistons in combination with a multitude of other moving parts, such as connecting rods, crankshafts, camshafts, and intake and exhaust valves. Moreover, the relationship between these moving parts involves constant friction which causes the parts to wear over time and which causes a certain amount of vibration within the engine, thereby stressing all of the parts within and adjacent to the engine.




Over the years several different rotary engine designs have been developed. For instance, U.S. Pat. Nos. 3,282,258, 3,595,014, 4,127,367, and 4,666,379 disclose various rotary engine designs. Although somewhat useful for their intended purposes, none have proven to be entirely satisfactory. Specifically, these prior art engines involve complex configurations which are difficult and, consequently, expensive to manufacture. Additionally, these prior art rotary engines have been found to be inefficient and, consequently, produce insufficient power.




More recent rotary engine designs utilize internal combustion to improve on the insufficient power and inefficiencies of the early designs. For instance, U.S. Pat. Nos. 4,744,736, 5,400,754 and 5,484,272 disclose rotary internal combustion engines which were developed to address the problems associated with the early rotary engine designs. However, these prior art rotary engines still include some of the problems associated with the earlier designs and also have not proven to be entirely satisfactory.




Accordingly, there is still a need in the art for an efficient rotary internal combustion engine which produces sufficient power and which is based on a fairly simple construction which is reasonably inexpensive to manufacture. The present invention is particularly suited to overcome those problems which remain in the art in a manner not previously known.




SUMMARY OF THE INVENTION




The present invention is directed towards a new and improved rotary internal combustion engine comprising a generally cylindrical shaped rotor housing, a pair of cylindrical shaped rotary discs, a pair of substantially flat stators mounted over the open ends of the rotor housing and a fuel injection system. The rotary discs each include an inner concentric member, an outer concentric member and a plurality of spaced apart vanes connecting the inner and outer concentric members and extending axially outward from the inner end of the rotary disc. The rotary discs are structured for mating engagement with one another by inserting the vanes of each rotary disc into the chambers of the other rotary disc formed by the vanes and the inner and outer members, thereby forming an interlocked rotary disc assembly. The resultant rotary disc assembly is structured to rotate within the rotary housing. A plurality of spark plugs protrude through spaced apart mounting holes in one of the stators and into the combustion chambers. A plurality of spaced apart exhaust ports extend through the other stator. A hollow tubular member extends out from a centrally disposed bore in each rotary disc and free wheel embedded therein and through a centrally disposed free wheel in the corresponding stators to prevent backward rotation of the rotary discs. Two additional free wheels embedded in the rotary discs, are connected to a central shaft to produce a continuous rotation in a single direction. A gear wheel, structured to mesh with the gears of a starting motor, is mounted on the end of each tubular member. A single port injection system includes a centrally located throttle body structured to distribute the air-fuel mixture into the combustion chambers via intake runners and intake ports extending radially through the outer band of the rotor housing and corresponding intake ports in the outer concentric member of each rotary disc. The intake ports in the rotor housing and rotary discs are structured and disposed so that, as the rotary discs rotate within the rotor housing, the intake ports in the rotary discs are periodically aligned with the intake ports in the rotor housing, thereby allowing the combustible air-fuel mixture to flow through the intake ports and into the combustion chambers. A plurality of water jackets ports, structured to allow a cooling medium to flow therethrough, extend axially through the outer band of the rotor housing and the first and second stators. A plurality of pick-up coils and magnetic bolts are correspondingly mounted in the stators and rotary discs to trigger the spark plug firing as the rotary discs rotate.




It is an object of the present invention to provide a new and improved rotary internal combustion engine which has all the advantages of the prior art devices and none of the disadvantages.




It is another object of the present invention to provide such an engine which is more efficient than the prior art rotary engines.




It is also an object of the present invention to provide such an engine which produces improved power over the prior art rotary engines.




It is a further object of the present invention to provide such an engine which utilizes a fairly simple construction.




It is yet another object of the present invention to provide such an engine which is reasonably inexpensive to manufacture.




These and other objects and advantages of the present invention will become more readily apparent in the description which follows.











BRIEF DESCRIPTION OF THE DRAWINGS




For a fuller understanding of the nature of the present invention, reference should be had to the following detailed description, taken in connection with the accompanying drawings in which:





FIG. 1

is an isolated view of the rotor housing and rotary discs.





FIG. 2

is a perspective view of the rotary internal combustion engine of the present invention.





FIG. 3

is a side elevation view of the rotor housing.





FIG. 4

is a side elevation view of the front rotary disc.





FIG. 5

is a side elevation view of the rear rotary disc.





FIG. 6

is a side elevation view of the first stator.





FIG. 7

is a side elevation view of the second stator.





FIG. 8

is cross sectional view of the rotary internal combustion engine.





FIGS. 8



a


-


8




b


show the freewheeling arrangement.











Like reference numerals refer to like parts throughout the several views of the drawings




DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT




Before explaining the disclosed embodiment of the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the particular arrangement shown since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation.




As shown in

FIGS. 1-8

, the present invention is directed towards a new and improved rotary internal combustion disc engine


10


comprising a rotor housing


20


, a pair of cylindrical shaped rotary discs


40


, a pair of substantially flat stators


60


,


70


and an injection system


80


. The rotor housing


20


is generally cylindrical shaped and includes an outer band


22


surrounding a hollow open chamber


24


.




The rotary discs


40


each include an inner concentric member


42


, an outer concentric member


44


and a plurality of spaced apart vanes


46


connecting the inner


42


and outer


44


concentric members and extending axially outward from the inner end


45


of the rotary disc


40


. A plurality of chambers


48


are defined by the vanes


46


and the inner


42


and outer


44


members. The rotary discs


40


are structured for mating engagement with one another by inserting the vanes


46


of each rotary disc


40


into the chambers


48


of the other rotary disc


40


, thereby forming an interlocked rotary disc assembly. The resultant rotary disc assembly is structured to rotate within the rotary housing


20


. In the present embodiment, each rotary disc


40


includes four vanes


46


, thereby forming eight chambers


48


upon combining the rotary discs


40


into the rotary disc assembly. Oil seals


51


are positioned around the chambers


48


between the rotary disks


40


and stators


60


,


70


to prevent oil from getting into the combustion chambers


48


.




The first stator


60


is mounted over the first open end


26


of the rotor housing


20


and includes a plurality of spaced apart spark plug mounting holes


62


, each structured to removably receive a spark plug therein. In the present embodiment, three spark plugs are provided. A plurality of spaced apart mounting holes


64


are disposed on the first stator


60


to align with corresponding internally threaded mounting holes


30


in the outer band


22


of the rotor housing


20


, adjacent the first open end


26


. The mounting holes


64


,


30


are structured to secure the first stator


60


to the rotor housing


20


with externally threaded screws or bolts.




The second stator


70


is mounted over the second open end


28


of the rotor housing


20


and includes a plurality of spaced apart exhaust ports


72


extending therethrough. The exhaust ports


72


are disposed so that exhaust gas may escape the chambers


48


in the rotary discs


40


. In the present embodiment, three exhaust ports


72


are provided. A plurality of spaced apart mounting holes


74


are disposed on the second stator


70


to align with corresponding internally threaded mounting holes


30


in the outer band


22


of the rotor housing


20


, adjacent the second open end


28


. The mounting holes


74


,


30


are structured to secure the second stator


70


to the rotor housing


20


with externally threaded screws or bolts.




Each rotary disc


40


also includes a free wheel


52


embedded within a central, axially disposed bore


49


in the inner concentric member


42


. A hollow tubular member


50


extends out from the bore


49


and free wheel


52


through the outer end


47


of each rotary disc


40


and through a centrally disposed free wheel


66


,


76


in the corresponding first


60


and second


70


stators. The free wheels


66


,


76


in the first and second stators


60


,


70


are structured to prevent backward rotation of the rotary discs


40


. The free wheels


52


are connected to a central shaft


54


which extends through the tubular member


50


to produce a continuous rotation in a single direction.




A gear wheel


90


is mounted on the end of each tubular member


50


. The gear wheels


90


are structured and disposed to mesh with the gears of a starting motor.




The fuel injection system


80


is a single point injector


81


mounted in a centrally located throttle body


82


to distribute the air-fuel mixture into the combustion chambers


48


via the plenum


87


and the intake runners


84


, intake ports


86


extending radially through the outer band


22


of the rotor housing


20


and corresponding intake ports


41


in the outer concentric member


44


of each rotary disc


40


. The intake ports


86


,


41


in the rotor housing


20


and rotary discs


40


are structured and disposed so that, as the rotary discs


40


rotate within the rotor housing


20


, the intake ports


41


in the rotary discs are periodically aligned with the intake ports


86


in the rotor housing


20


, thereby allowing the combustible air-fuel mixture to flow through the intake ports


86


,


41


and into the combustion chambers


48


. The air enters the system


80


through an air inlet


88


connected to the system


80


. Although a single point system is preferred, it should be appreciated that a multiport injection system may, alternatively, be utilized to improve fuel distribution.




A plurality of water jackets ports


110


extend axially through the outer band


22


of the rotor housing


20


and the first


60


and second


70


stators. The water jacket ports


110


are structured to allow a cooling medium to flow therethrough. Oil inlet passages


111


allow oil to flow in between the discs and the stator. There is a bushing


113


in each stator to avoid leakage of oil.




A plurality of pick-up coils


120


extend through the first


60


and second stators


70


and are structured for periodic alignment with magnetic bolts


122


mounted within the outer end


47


of the outer concentric member


44


of each rotary disc


40


as the rotary discs


40


rotate. Upon alignment of the magnetic bolts


122


and pick-up coils


120


, each pick-up coil


120


generates a small alternating current which signals an electronic control unit to trigger the corresponding spark plug to fire. In the present embodiment, three pick-up coils


120


and spark plugs


121


are utilized.




In operation, the rotary internal combustion engine


10


of the present invention comprises eight working chambers, four in the expanding stage and four in the contracting stage. A typical cycle is initiated by the ignition stroke in chamber


1


, which:




1. completes the exhaust stroke in chamber


2


;




2. brings in the air-fuel mixture into chamber


3


through the intake ports


86


,


41


;




3. partially compresses burned gas in chamber


4


;




4. suctions some of the air-fuel mixture into chamber


5


;




5. compresses the air-fuel mixture in chamber


6


;




6. scavenges some burned gas from an exhaust port into chamber


7


; and




7. returns some of the air-fuel mixture from chamber


8


to an intake runner


84


.




The cycle is then repeated when the compressed gas in chamber


6


is ignited by the corresponding spark plug.




While the invention has been described, disclosed, illustrated and shown in various terms of certain embodiments or modifications, which it has presumed in practice, the scope of the invention is not intended to be, nor should it be deemed to be, limited thereby and such other modifications or embodiments as may be suggested by the teachings herein are particularly reserved, especially as they fall within the breadth and scope of the claims here appended.



Claims
  • 1. A rotary internal combustion disc engine comprising:a cylindrical shaped rotor housing having a first open end and an opposite second open end; a pair of cylindrical shaped rotary discs, each of said rotary discs having an inner concentric member, an outer concentric member with at least one port extending radially therethrough and a plurality of spaced apart vanes connecting said outer and inner members and extending axially outward from said rotary disc, said outer member, said inner member and said vanes defining a plurality of chambers; said rotary discs being structured for mating engagement with one another by inserting said vanes of a first one of said rotary discs into said chambers of a second one of said rotary discs and said vanes of said second one of said rotary discs into said chambers of said first one of said discs, thereby forming an interlocked rotary disc assembly, said rotary disc assembly being structured to rotate within said rotary housing; a first substantially flat stator mounted over said first open end of said rotor housing; a second substantially flat stator mounted over said second open end of said rotor housing and having a plurality of exhaust ports; each of said rotary discs further including an axially disposed tubular member extending out from said inner member, said tubular member of said first one of said rotary discs being structured and disposed to extend through said first stator and said tubular member of said second one of said rotary discs being structured and disposed to extend through said second stator; a pair of gear wheels, each of said gear wheels being mounted on an end of one of said tubular members and being meshed with a starting motor gear; a centrally disposed shaft connected to said rotary discs and extending through said tubular members, said shaft and tubular members being structured to ensure rotation of said rotary discs in a single direction; means for injecting a combustible material into said plurality of chambers; and means for igniting said combustible material in select ones of said plurality of chambers.
  • 2. The rotary internal combustion disc engine as recited in claim 1 wherein said means for injecting a combustible material into said plurality of chambers comprises an injection system.
  • 3. The rotary internal combustion disc engine as recited in claim 2 wherein said fuel injection system comprises a supply conduit or plenum and three intake runners, each of said runners having a first end coupled to an intake port extending through said rotor housing and an opposite second end coupled to said supply conduit, or plenum, said supply conduit being structured to allow said combustible material to flow therethrough, said intake ports in said rotor housing and said at least one port in said outer concentric member of said rotary discs being structured and disposed for periodic alignment with one another upon rotation of said rotary discs within said rotor housing, thereby allowing said combustible material to flow through said intake conduit, said intake ports and said at least one port and into said plurality of chambers.
  • 4. The rotary internal combustion disc engine as recited in claim 1 wherein said means for igniting said combustible material in select ones of said plurality of chambers comprises three spark plugs extending through said first stator and into said rotor housing and means for actuating said three spark plugs.
  • 5. The rotary internal combustion disc engine as recited in claim 4 wherein said means for actuating said three spark plugs comprises a plurality of magnetic bolts mounted in said outer concentric members of said rotary discs and three pick-up coils mounted in each of said first and second stators, said magnetic bolts and pick-up coils being structured and disposed to engage one another upon rotation of said rotary discs, thereby causing said pick-up coil to generate an electronic signal which triggers said at least one spark plug.
  • 6. The rotary internal combustion disc engine as recited in claim 1 further comprising means for cooling the engine.
  • 7. The rotary internal combustion disc engine as recited in claim 6 wherein said means for cooling the engine comprises a plurality of water jackets extending axially through an outer band of said rotor housing and said first and second stators, said water jackets being structured to allow a cooling medium to flow therethrough.
  • 8. A rotary internal combustion disc engine comprising:a cylindrical shaped rotor housing having a first open end and an opposite second open end; a pair of cylindrical shaped rotary discs, each of said rotary discs having an inner concentric member, an outer concentric member with at least one port extending radially therethrough and a plurality of spaced apart vanes connecting said outer and inner members and extending axially outward from said rotary disc, said outer member, said inner member and said vanes defining a plurality of chambers; said rotary discs being structured for mating engagement with one another by inserting said vanes of a first one of said rotary discs into said chambers of a second one of said rotary discs and said vanes of said second one of said rotary discs into said chambers of said first one of said discs, thereby forming an interlocked rotary disc assembly, said rotary disc assembly being structured to rotate within said rotary housing; a first substantially flat stator mounted over said first open end of said rotor housing; a second substantially flat stator mounted over said second open end of said rotor housing and having a plurality of exhaust ports; each of said rotary discs further including an axially disposed tubular member extending out from said inner member, said tubular member of said first one of said rotary discs being structured and disposed to extend through said first stator and said tubular member of said second one of said rotary discs being structured and disposed to extend through said second stator; a pair of gear wheels, each of said gear wheels being mounted on an end of one of said tubular members and being meshed with a starting motor gear; a centrally disposed shaft connected to said rotary discs and extending through said tubular members, said shaft and tubular members being structured to ensure rotation of said rotary discs in a single direction; means for injecting a combustible material into said plurality of chambers; three spark plugs extending through said first stator and into said rotor housing; and means for actuating said three spark plugs comprising four magnetic bolts mounted in said outer concentric members of said rotary discs and three pick-up coils mounted in each of said first and second stators, said magnetic bolts and pick-up coils being structured and disposed to engage one another upon rotation of said rotary discs, thereby causing said pick-up coils to generate an electronic signal which triggers said three spark plugs.
  • 9. The rotary internal combustion disc engine as recited in claim 8 wherein said means for injecting a combustible material into said plurality of chambers comprises an injection system.
  • 10. The rotary internal combustion disc engine as recited in claim 8 further comprising means for cooling the engine.
  • 11. The rotary internal combustion disc engine as recited in claim 10 wherein said means for cooling the engine comprises a plurality of water jackets extending axially through an outer band of said rotor housing and said first and second stators, said water jackets being structured to allow a cooling medium to flow therethrough.
  • 12. A rotary internal combustion disc engine comprising:a cylindrical shaped rotor housing having an outer band, a first open end and an opposite second open end; a pair of cylindrical shaped rotary discs, each of said rotary discs having an inner concentric member, an outer concentric member with at least one port extending radially therethrough and a plurality of spaced apart vanes connecting said outer and inner members and extending axially outward from said rotary disc, said outer member, said inner member and said vanes defining a plurality of chambers; said rotary discs being structured for mating engagement with one another by inserting said vanes of a first one of said rotary discs into said chambers of a second one of said rotary discs and said vanes of said second one of said rotary discs into said chambers of said first one of said discs, thereby forming an interlocked rotary disc assembly, said rotary disc assembly being structured to rotate within said rotary housing; a first substantially flat stator mounted over said first open end of said rotor housing; a second substantially flat stator mounted over said second open end of said rotor housing and having a plurality of exhaust ports extending therethrough; means for cooling the engine comprising a plurality of water jackets extending axially through said outer band and said first and second stators, said water jackets being structured to allow a cooling medium to flow therethrough; each of said rotary discs further including an axially disposed tubular member extending out from said inner member, said tubular member of said first one of said rotary discs being structured and disposed to extend through said first stator and said tubular member of said second one of said rotary discs being structured and disposed to extend through said second stator; a pair of gear wheels, each of said gear wheels being mounted on an end of one of said tubular members and being meshed with a starting motor gear; a centrally disposed shaft connected to said rotary discs and extending through said tubular members, said shaft and tubular members being structured to ensure rotation of said rotary discs in a single direction; means for injecting a combustible material into said plurality of chambers; three spark plugs extending through said first stator and into said rotor housing; and means for actuating said three park plugs comprising a plurality of magnetic bolts mounted in said outer concentric members of said rotary discs and three pick-up coils mounted in each of said first and second stators, said magnetic bolts and pick-up coils being structured and disposed to engage one another upon rotation of said rotary discs, thereby causing said pick-up coil to generate an electronic signal which triggers said at least one spark plug.
  • 13. The rotary internal combustion disc engine as recited in claim 12 wherein said means for injecting a combustible material into said plurality of chambers comprises an injection system.
  • 14. The rotary internal combustion disc engine as recited in claim 13 wherein said fuel injection system comprises a supply conduit or plenum and three intake runners, each of said runners having a first end coupled to an intake port extending through said rotor housing and an opposite second end coupled to said supply conduit or plenum, said supply conduit being structured to allow said combustible material to flow therethrough, said intake ports in said rotor housing and said at least one port in said outer concentric member of said rotary discs being structured and disposed for periodic alignment with one another upon rotation of said rotary discs within said rotor housing, thereby allowing said combustible material to flow through said intake conduit, said intake ports and said at least one port and into said plurality of chambers.
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Number Date Country
WO8606786 Nov 1986 WO