Internal combustion engine with port communication
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/44
F02B-053/00
F01C-001/02
F02B-057/04
F01C-001/22
F02B-029/02
출원번호
US-0799965
(2013-03-13)
등록번호
US-9181863
(2015-11-10)
발명자
/ 주소
Thomassin, Jean
Rousseau, Patrick
Martel, Eric-Pierre
출원인 / 주소
PRATT & WHITNEY CANADA CORP.
대리인 / 주소
Norton Rose Fulbright Canada
인용정보
피인용 횟수 :
1인용 특허 :
18
초록▼
An internal combustion engine with rotatable bodies each received in a respective internal cavity. The engine includes at least one inlet port for each internal cavity in fluid communication with the combustion chamber(s) thereof at least during their intake phase and a beginning of their compressio
An internal combustion engine with rotatable bodies each received in a respective internal cavity. The engine includes at least one inlet port for each internal cavity in fluid communication with the combustion chamber(s) thereof at least during their intake phase and a beginning of their compression phase. The bodies are angularly offset with the beginning of the compression phase of the combustion chamber(s) defined by each body being simultaneous with at least a beginning of the intake phase of the combustion chamber(s) defined by a different one of the bodies. A respective conduit provides a fluid communication between an inlet port for each body and an inlet port for the different one of the bodies, with each conduit being in fluid communication with a plenum for receiving pressurized air. A method of feeding air to an internal combustion engine is also provided.
대표청구항▼
1. An internal combustion engine comprising: at least two rotatable bodies;an outer body defining at least two internal cavities each sealingly and rotationally receiving therein a respective one of the at least two rotatable bodies to each define at least one combustion chamber of variable volume u
1. An internal combustion engine comprising: at least two rotatable bodies;an outer body defining at least two internal cavities each sealingly and rotationally receiving therein a respective one of the at least two rotatable bodies to each define at least one combustion chamber of variable volume undergoing a cycle defining successive phases of intake, compression, combustion and exhaust;for each of the at least two internal cavities; a primary inlet port in successive fluid communication with each of the at least one combustion chamber during the intake phase thereof and a beginning portion of the compression phase thereof,a secondary inlet port in successive fluid communication with each of the at least one combustion chamber during at least a beginning portion of the intake phase thereof, andat least one exhaust port in successive fluid communication with each of the at least one combustion chamber during the exhaust phase thereof;a rotatable shaft, the at least two rotatable bodies being drivingly engaged to the rotatable shaft in an angularly offset manner;a plenum for receiving pressurized air; anda plurality of conduits in fluid communication with the plenum, each of the plurality of conduits defining a fluid communication between the primary inlet port of a first respective one of the internal cavities and the secondary inlet port of a second respective one of the internal cavities;wherein the at least two rotatable bodies are angularly offset such that for each of the plurality of conduits, each of the at least one combustion chamber of the first respective one of the internal cavities undergoes the beginning portion of the compression phase simultaneously with a respective one of the least one combustion chamber of the second respective one of the internal cavities undergoing the beginning portion of the intake phase. 2. The engine as defined in claim 1, wherein the secondary inlet port is also in fluid communication with each of the at least one combustion chamber during an end of the exhaust phase thereof, the at least two rotatable bodies being angularly offset such that for each of the plurality of conduits, each of the at least one combustion chamber of the first respective one of the internal cavities undergoes the beginning portion of the compression phase simultaneously with the respective one of the least one combustion chamber of the second respective one of the internal cavities also undergoing the end of the exhaust phase. 3. The engine as defined in claim 1, wherein the at least two rotatable bodies include at least one pair of first and second rotors, with a first one of the plurality of conduits providing a fluid communication between the primary inlet port of the first rotor and the secondary inlet port of the second rotor of the same pair, and a second one of the plurality of conduits providing a fluid communication between the primary inlet port of the second rotor and the secondary inlet port of the first rotor of the same pair. 4. The engine as defined in claim 1, wherein each of the plurality of conduits has first, second, third and fourth successive segments each having a circular cross-section, the first segment extending from the plenum, the fluid communication with the primary inlet port being defined in the second segment, and the fluid communication with the secondary inlet port being defined in the fourth segment, a diameter of the second segment being smaller than a diameter of the first segment and than a diameter of the fourth segment. 5. The engine as defined in claim 4, wherein a ratio between the diameter of the first segment and the diameter of the second segment and a ratio between the diameter of the fourth segment and the diameter of the second segment are between 1 and 2. 6. The engine as defined in claim 4, wherein the third segment defines a tapered transition between the second and fourth segments, an outer wall of the third segment forming an angle of from about 2.5° to about 7.5° with an outer wall of the fourth segment. 7. The engine as defined in claim 4, wherein the fluid communication between the primary inlet port and the second segment is provided through a conduit extending at an angle of from about −45° to about 60° with respect to a line perpendicular to a central axis of the second segment. 8. The engine as defined in claim 1, wherein each of the at least two internal cavities is defined by two axially spaced apart end walls and a peripheral wall extending between the end walls, and each of the at least two rotatable bodies is a rotor body rotatable within the respective one of the at least two internal cavities in sealing engagement with the peripheral and end walls defining a plurality of combustion chambers of variable volume. 9. The engine as defined in claim 8, wherein each of the at least two internal cavities defines an epitrochoid shape with two lobes, and each rotor body has three circumferentially spaced apex portions, and the plurality of combustion chambers includes three rotating chambers of variable volume, the rotor body being engaged to an eccentric portion of the shaft to rotate and perform orbital revolutions within the respective one of the at least two internal cavities with each of the apex portions remaining in sealing engagement with the peripheral wall and separating the chambers. 10. A system comprising: a turbocharger having a compressor;a rotary internal combustion engine having: at least two rotors,an outer body defining: at least two internal cavities each sealingly and rotationally receiving therein a respective one of the at least two rotors to define a plurality of combustion chambers of variable volume each undergoing a cycle defining successive phases of intake, compression, combustion and exhaust,for each of the at least two internal cavities:a primary inlet port in successive fluid communication with each of the combustion chambers during the intake phase thereof and a beginning portion of the compression phase thereof,a secondary inlet port in successive fluid communication with each of the combustion chambers during a secondary portion of the cycle, the secondary portion of the cycle including at most a beginning of the intake phase and an end of the exhaust phase of the combustion chamber, andan exhaust port in successive fluid communication with each of the combustion chambers of the respective internal cavity during the exhaust phase thereof;a rotatable shaft, the rotors being drivingly engaged to the rotatable shaft in an angularly offset manner;a plenum in fluid communication with the compressor; anda plurality of conduits in fluid communication with the plenum, each of the plurality of conduits providing a fluid communication between the primary inlet port of a first respective one of the at least two internal cavities and the secondary inlet port of a second respective one of the at least two internal cavities;wherein the at least two rotors are angularly offset around the rotatable shaft such that for each of the plurality of conduits, each of the combustion chambers of the first respective one of the internal cavities undergoes the beginning portion of the compression phase simultaneously with a respective one of the chambers of the second respective one of the internal cavities undergoing at least part of the secondary portion of the cycle;whereby each of the plurality of conduits allows for compressed air overflowing from the primary inlet port of the first respective one of the internal cavities during the beginning portion of the compression phase of each of the at least one combustion chamber thereof to be fed into the secondary inlet port of the second respective one of the internal cavities during the secondary portion of the cycle of each of the at least one combustion chamber thereof. 11. The system as defined in claim 10, wherein the rotors are drivingly engaged to the rotatable shaft in an angularly offset manner such that for each of the plurality of conduits, each of the combustion chambers of the respective one of the internal cavities undergoes the beginning portion of the compression phase simultaneously with a respective one of the combustion chambers of the different respective one of the internal cavities undergoing the beginning of the intake phase. 12. The system as defined in claim 10, wherein the rotors include at least one pair of first and second rotors, with a first one of the plurality of conduits providing a fluid communication between the primary inlet port of the first rotor and the secondary inlet port of the second rotor of the same pair, and a second one of the plurality of conduits providing a fluid communication between the primary inlet port of the second rotor and the secondary inlet port of the first rotor of the same pair. 13. The system as defined in claim 10, wherein each of the at least two internal cavities defines an epitrochoid shape with two lobes, and each of the at least two rotors has three circumferentially spaced apex portions, and the plurality of combustion chambers includes three rotating chambers of variable volume, the rotor being engaged to an eccentric portion of the shaft to rotate and perform orbital revolutions within the respective one of the at least two internal cavities with each of the apex portions remaining in sealing engagement with the peripheral wall and separating the chambers. 14. The system as defined in claim 10, wherein each of the plurality of conduits has a first, second, third and fourth successive segments each having a circular cross-section, the first segment extending from the plenum, the fluid communication with the primary inlet port being defined in the second segment, and the fluid communication with the secondary inlet port being defined in the fourth segment, a diameter of the second segment being smaller than a diameter of the first segment and than a diameter of the fourth segment. 15. The system as defined in claim 14, wherein a ratio between the diameter of the first segment and the diameter of the second segment and a ratio between the diameter of the fourth segment and the diameter of the second segment are between 1 and 2. 16. The system as defined in claim 14, wherein the third segment defined a tapered transition between the second and fourth segments, an outer wall of the third segment forming an angle of from about 2.5° to about 7.5° with an outer wall of the fourth segment. 17. The system as defined in claim 14, wherein the fluid communication between the primary inlet port and the second segment is provided through a conduit extending at an angle of from about −45° to about 60° with respect to a perpendicular to a central axis of the second segment.
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이 특허에 인용된 특허 (18)
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