Claims
- 1. A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; transfer passage means in communication with the crankcase and having porting through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, said intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space independently of the transfer passage means throughout the entire upward stroke of the piston, from substantially the bottom dead center position to substantially the top dead center position thereof; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and injector passage means connected with the intake chamber and with said transfer passage means for delivering fuel directly to the combustion side of the piston without compression in the crankcase, said injector passage means including two passages each in communication with said intake chamber downstream of said reed valve means, a first of the injector passages communicating with the transfer passage means immediately adjacent the transfer porting through the cylinder wall, and the second of the injector passages communicating with the injector passage means in a region spaced from the transfer porting through the cylinder wall.
- 2. An engine as defined in claim 1 in which the first and second injector passages communicate with a single transfer passage.
- 3. An engine as defined in claim 1 in which the transfer passage means includes at least two transfer passages and in which the first and second injector passages are respectively connected with different transfer passages.
- 4. An engine as defined in claim 1 in which said first injector passage comprises an open channel formed in the wall of the cylinder and in which said second injector passage is formed within the cylinder wall structure.
- 5. An engine as defined in claim 1 in which the transfer passage means includes two transfer passages at each side of the cylinder and in which the injector passage means includes first and second passages at each side of the cylinder respectively connected with the first and second transfer passages.
- 6. An engine as defined in claim 1 in which the transfer passage means includes at least two transfer passages toward one side of the cylinder spaced circumferentially of the cylinder different distances from the intake chamber, said first injector passage comprising an open channel formed in the wall of the cylinder and communicating with that one of the transfer passages which is more remote from the intake chamber, and said second injector passage being formed in the cylinder wall structure at least in part radially outboard of the base of said channel and communicating with the other transfer passage.
- 7. An engine as defined in claim 1 in which the transfer passage means includes first and second transfer passages toward one side of the cylinder spaced circumferentially of the cylinder different distances from the intake chamber, the first and second injector passages being at least in part offset from each other axially of the cylinder.
- 8. An engine as defined in claim 1 in which the transfer passage means includes first and second transfer passages toward one side of the cylinder spaced circumferentially of the cylinder different distances from the intake chamber, the first and second injector passages being at least in part offset from each other radially of the cylinder.
- 9. A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; first and second transfer passages in communication with the crankcase and having separate openings through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase independently of the transfer passages; said first transfer passage being spaced from the intake chamber circumferentially of the cylinder a greater distance than said second transfer passage; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and first and second injector passages connected with the transfer passages and with the intake chamber to receive fuel from the intake chamber and supply it to said transfer passages and thus directly deliver such fuel to the combustion side of the piston without compression thereof in the crankcase, the first injector passage comprising an open channel formed in the wall of the cylinder and communicating with that one of the transfer passages which is more remote from the intake chamber, and the second injector passage being formed within the cylinder wall structure and communicating with the transfer passage which is closer to the intake chamber.
- 10. An engine as defined in claim 9 in which said first injector passage has a juncture with the first transfer passage closer to the opening of said first transfer passage into the cylinder, as compared with the point of juncture of said second injector passage with said second transfer passage.
- 11. An engine as defined in claim 10 in which the juncture of the first injector passage with the first transfer passage is located close to the opening of the first transfer passage into the cylinder and is configured to establish a Venturi action drawing fluid from the injector passage into the fluid stream flowing through the opening of the transfer passage into the cylinder.
- 12. A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; first and second transfer passages in communication with the crankcase and having porting through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; fuel intake means for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase independently of the transfer passages; said first transfer passage being spaced from the intake chamber circumferentially of the cylinder a greater distance than said second transfer passage; valve means for controlling the flow of fluid through the intake means and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; said first and second injector passages connected, respectively with the first and second transfer passages, and with the intake means to receive fuel therefrom and supply it to said transfer passages and thus directly deliver such fuel to the combustion side of the piston without compression thereof in the crankcase, the first injector passage having a juncture with the first transfer passage at a point closer to the transfer porting into the cylinder than the point of juncture of the second injector passage with the second transfer passage, and the first and second injector passages being extended in the cylinder wall in positions with the first injector passage at least in part above the second injector passage.
- 13. An engine as defined in claim 12 in which at least one of said injector passages is formed within the cylinder wall structure.
- 14. An engine as defined in claim 12 in which first injector passage comprises an open channel formed in the wall of the cylinder.
- 15. An engine as defined in claim 14 in which the second injector passage is formed within the cylinder wall structure.
- 16. A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; first and second transfer passages in communication with the crankcase and having porting through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; fuel intake means for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase independently of the transfer passages; and injector passage means for injecting fuel from the intake means into the transfer fuel flow without compression in the crankcase, the injector passage means including at least two passages both of which operate with increasing fuel injection effect with increase in engine speed but one of which passages operates with greater increase in fuel injection effect with increase in engine speed than the other passage.
- 17. A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; transfer passage means in communication with the crankcase and having porting through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; fuel intake means for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, and intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space independently of the transfer passage means throughout the entire upward stroke of the piston, from substantially the bottom dead center position to substantially the top dead center position thereof; injector passage means connected with the intake means and with said transfer passage means for delivering fuel directly to the combustion side of the piston without compression in the crankcase, said injector passage means including two passages each in communication with said intake means, a first of the injector passages communicating with the transfer passage means immediately adjacent the transfer porting through the cylinder wall, and the second of the injector passages communicating with the injector passage means in a region spaced from the transfer porting through the cylinder wall; and reed valve means for controlling the flow of fuel through the intake means and including separate reed valves for respectively controlling the fuel flow into the first and second injector passages and substantially preventing fuel flow back toward the supply source during downward movement of the piston toward its bottom dead center position.
CROSS REFERENCES
The present application is a continuation-in-part of my prior application Ser. No. 839,180, filed Oct. 4, 1977, and of my application Ser. No. 674,102, U.S. Pat. No. 4,062,331 filed Apr. 6, 1976, which latter is a continuation-in-part of my application Ser. No. 586,138, U.S. Pat. No. 4,051,820 filed June 11, 1975, which in its turn is a continuation-in-part of my application Ser. No. 375,065, U.S. Pat. No. 3,905,340 filed June 29, 1973, which in its turn is a continuation-in-part of my prior application Ser. No. 282,734, filed Aug. 22, 1972, now abandoned, and of my prior application Ser. No. 361,407, filed May 18, 1973, now abandoned. Said application Ser. No. 375,065 has now matured as U.S. Pat. No. 3,905,340. Applications bearing Ser. Nos. 416,213, and 416,215, filed Nov. 15, 1973, are divisions of Ser. No. 375,065 and, said application Ser. No. 416,215 is now U.S. Pat. No. 3,905,341, and said application 416,213 is now U.S. Pat. No. 4,000,723. Application Ser. No. 586,138 is now U.S. Pat. No. 4,051,820, issued Oct. 4, 1977.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
280597 |
Dec 1930 |
ITX |
Related Publications (2)
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Number |
Date |
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674102 |
Apr 1976 |
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361407 |
May 1973 |
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Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
839180 |
Oct 1977 |
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Parent |
586138 |
Jun 1975 |
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Parent |
375065 |
Jun 1973 |
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Parent |
282734 |
Aug 1972 |
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