Claims
- 1. A two-cycle, crankcase compression internal combustion engine having a cylinder with a piston movable in the cylinder between top and bottom dead center positions, fuel intake porting in the cylinder positioned to be controlled by the piston, reed valve controlled intake passage means communicating with the intake porting, the intake porting and passage means being positioned toward one side of the cylinder, exhaust porting at the side of the cylinder opposite to the intake porting, transfer ports in the cylinder wall, a first one of said transfer ports being positioned at a first side of the cylinder between the intake porting and the exhaust porting and the second one of said transfer ports being positioned at a second side of the cylinder opposite to said first side between the intake porting and the exhaust porting, auxiliary transfer porting in the cylinder wall at a level above the intake porting and communicating with the intake passage means, and two auxiliary passages in communication with the intake passage means independently and offset from each other, one toward said first side wall of the cylinder and the other toward said second side wall of the cylinder, said two auxiliary passages being in communication with the crankcase throughout the piston stroke and even in bottom dead center position of the piston.
- 2. An engine as defined in claim 1 in which said intake porting comprises two intake ports, in which said intake passage means comprises two passages, and in which said auxiliary passages are respectively connected with the two intake passages.
- 3. A two-cycle, crankcase compression internal combustion engine having a cylinder with a piston movable in the cylinder between top and bottom dead center positions, fuel intake porting in the cylinder positioned to be controlled by the piston, intake passage means communicating with the intake porting, the intake porting and passage means being positioned toward one side of the cylinder, exhaust porting at the side of the cylinder opposite to the intake porting, transfer porting in the cylinder wall and including port means having communication with the intake passage means throughout the piston stroke, the transfer porting including a first transfer port positioned at a first side of the cylinder between the intake porting and the exhaust porting and a second transfer port positioned at a second side of the cylinder opposite to said first side between the intake porting and the exhaust porting, two auxiliary passages in communication with the intake passage means independently and offset from each other, one toward said first side wall of the cylinder and the other toward said second side wall of the cylinder, said two auxiliary passages being in communication with the crankcase independently and offset from each other, one toward said first side wall of the cylinder and the other toward said second side wall of the cylinder, and said two auxiliary passages being in communication with the crankcase throughout the piston stroke and even in bottom dead center position of the piston, and reed valve means controlling the fuel flow through the intake passage means and said auxiliary passages.
- 4. A two-cycle, crankcase compression internal combustion engine having a cylinder with a piston movable in the cylinder between top and bottom dead center positions, fuel intake porting in the cylinder positioned to be controlled by the piston, reed valve controlled intake passage means communicating with the intake porting, the intake porting and passage means being positioned toward one side of the cylinder, exhaust porting at the side of the cylinder opposite to the intake porting, transfer ducts in the cylinder wall, a first one of said transfer ducts being positioned at a first side of the cylinder between the intake porting and the exhaust porting and the second one of said transfer ducts being positioned at a second side of the cylinder opposite to said first side between the intake porting and the exhaust porting, each transfer duct having a transfer port through the cylinder wall above the piston in bottom dead center position and each transfer duct having a duct entrance in communication with the crankcase even in bottom dead center position, auxiliary transfer porting in the cylinder wall at a level above the intake porting and communicating with the intake passage means, and two auxiliary passages in communication with the intake passage means independently and offset from each other, one toward said first side wall of the cylinder and the other toward said second side wall of the cylinder, the auxiliary passage at one side having communication with the transfer duct and the crankcase at that side of the cylinder throughout the piston stroke and even in bottom dead center position of the piston, and the auxiliary passage at the other side having communication with the transfer duct and the crankcase at said other side of the cylinder throughout the piston stroke and even in bottom dead center position of the piston.
Parent Case Info
This application is a continuation of application Ser. No. 133,098, filed Mar. 24, 1980, issued as U.S. Pat. No. 4,294,202 on Oct. 13, 1981, which application is a continuation-in-part of application Ser. No. 941,596, filed Sept. 12, 1978, now U.S. Pat. No. 4,202,298 which is a continuation-in-part of application Ser. No. 859,476, filed Dec. 12, 1977, and issued Mar. 13, 1979 as U.S. Pat. No. 4,143,626, which is a continuation-in-part of application Ser. No. 839,180, and issued July 17, 1979 as U.S. Pat. No. 4,161,163, filed Oct. 4, 1977, which applications are continuations-in-part of certain earlier applications including Ser. No. 674,102, filed Apr. 6, 1976, and issued Dec. 13, 1977, as U.S. Pat. No. 4,062,331, Ser. No. 586,138, filed June 11, 1975, and issued Oct. 4, 1977, as U.S. Pat. No. 4,051,820, which, in its turn, is a continuation-in-part of my application Ser. No. 375,065, filed June 29, 1973, and issued Sept. 16, 1975, as U.S. Pat. No. 3,905,340, which, in its turn, is a continuation-in-part of my prior application Ser. No. 282,734, filed Aug. 22, 1972, now abandoned, and also of my prior application Ser. No. 361,407, filed May 18, 1973, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
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55-5476 |
Jan 1980 |
JPX |
Related Publications (2)
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Date |
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586138 |
Jun 1975 |
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361407 |
May 1973 |
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Continuations (1)
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Date |
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Parent |
133098 |
Mar 1980 |
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Continuation in Parts (6)
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Number |
Date |
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941596 |
Sep 1978 |
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Parent |
859476 |
Dec 1977 |
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Parent |
839180 |
Jul 1979 |
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Parent |
674102 |
Apr 1976 |
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Parent |
375065 |
Jun 1973 |
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Parent |
282734 |
Aug 1972 |
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