IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0758822
(2013-02-04)
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등록번호 |
US-8651086
(2014-02-18)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.
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인용정보 |
피인용 횟수 :
5 인용 특허 :
23 |
초록
▼
An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engine can thus be run at higher revolu
An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engine can thus be run at higher revolutions per minute and produce more power. An internal sleeve valve is provided for space and other considerations. A combustion chamber size-varying mechanism allows for adjustment of the minimum size of an internal volume to increase efficiency at partial-power operation. Variable intake valve operation is used to control engine power.
대표청구항
▼
1. An internal combustion engine, comprising: a cylinder block portion having a cylindrical bore therein;a path-defining piece inserted within the cylindrical bore, the path-defining piece comprising an inner surface and a helical groove formed in the inner surface; anda sleeve valve disposed within
1. An internal combustion engine, comprising: a cylinder block portion having a cylindrical bore therein;a path-defining piece inserted within the cylindrical bore, the path-defining piece comprising an inner surface and a helical groove formed in the inner surface; anda sleeve valve disposed within the oil path-defining piece and slidably moveable relative to the path-defining piece, the sleeve valve comprising a first outer surface, an enclosed helical cooling passage being defined by the first outer surface of the sleeve valve and by the helical groove. 2. The internal combustion engine of claim 1, wherein the path-defining piece further comprises an inlet groove and an outlet groove in communication with opposing ends of the helical groove such that the inlet groove receives pumped cooling fluid for passage of the cooling fluid through the helical cooling passage over the first outer surface of the sleeve valve and the pumped cooling fluid exits the helical cooling passage through the outlet groove, heat being convected from the sleeve valve to the cooling fluid. 3. The internal combustion engine of claim 1, wherein the path-defining piece further comprises an inlet groove and an outlet groove in communication with opposing ends of the helical groove, the inlet groove and the outlet groove being formed in a second outer surface of the path-defining piece, the internal combustion engine further comprising: an outlet port through the cylinder block portion connected to the outlet groove; andan inlet port through the cylinder block portion connected to the inlet groove for pumping a cooling fluid through the inlet port, through the helical cooling passage over the first outer surface of the sleeve valve, and out of the outlet port such that heat convects from the sleeve valve to the cooling fluid and is removed by the cooling fluid through the outlet port. 4. The internal combustion engine of claim 3, wherein the cooling fluid comprises cooling oil. 5. The internal combustion engine of claim 3, further comprising a seat, wherein the sleeve valve is slidably movable between a first position where a port controlled by the sleeve valve is open and a second position where the sleeve valve closes the port, wherein the sleeve valve comprises an end surface that abuts the seat when the sleeve valve closes the port, and wherein the flow of the cooling fluid in the helical cooling passage moves in a direction away from the end surface. 6. The internal combustion engine of claim 1, wherein the sleeve valve is slidably movable along a primarily linear reciprocating path relative to the path-defining piece. 7. The internal combustion engine of claim 1, wherein the sleeve valve is slidably movable between a first position where a port controlled by the sleeve valve is open and a second position where the sleeve valve closes the port. 8. A sleeve valve apparatus comprising: a path-defining piece comprising an inner surface and a helical groove formed in the inner surface; anda sleeve valve comprising a first outer surface, an enclosed helical cooling passage being defined by the first outer surface of the sleeve valve and by the helical groove. 9. The sleeve valve apparatus of claim 8, wherein the path-defining piece further comprises an inlet groove and an outlet groove in communication with opposing ends of the helical groove, the inlet groove and the outlet groove being formed in a second outer surface of the path-defining piece. 10. A method comprising: slidably moving a sleeve valve relative to a path-defining piece in an internal combustion engine, the path-defining piece comprising an inner surface and a helical groove formed in the inner surface, the sleeve valve comprising a first outer surface, an enclosed helical cooling passage being defined by the outer surface of the sleeve valve and by the helical groove;pumping a cooling fluid through the enclosed helical cooling passage over the first outer surface of the sleeve valve such that heat convects from the sleeve valve to the cooling fluid and is removed by the cooling fluid. 11. The method of claim 10, wherein path-defining piece further comprises an inlet groove and an outlet groove in communication with opposing ends of the helical groove, the inlet groove and the outlet groove being formed in a second outer surface of the path-defining piece, the internal combustion engine further comprising: a cylinder block portion having a cylindrical bore therein, the path-defining piece being inserted within the cylindrical bore;an outlet port through the cylinder block portion connected to the outlet groove; andan inlet port through the cylinder block portion connected to the inlet groove for pumping the cooling fluid through the inlet port, through the helical cooling passage over the sleeve valve outer surface, and out of the outlet port. 12. The method of claim 10, wherein the cooling fluid comprises cooling oil. 13. The method of claim 10, wherein the internal combustion engine further comprises a seat, wherein the sleeve valve is slidably movable between a first position where a port controlled by the sleeve valve is open and a second position where the sleeve valve closes the port, wherein the sleeve valve comprises an end surface that abuts the seat when the sleeve valve closes the port, and wherein the flow of the cooling fluid in the helical cooling passage moves in a direction away from the end surface. 14. The method of claim 10, wherein the sleeve valve is slidably movable along a primarily linear reciprocating path relative to the path-defining piece. 15. The method of claim 10, wherein the sleeve valve is slidably movable between a first position where a port controlled by the sleeve valve is open and a second position where the sleeve valve closes the port.
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