[특허]Combustion chamber constructions for opposed-piston engines

Combustion chamber constructions for opposed-piston engines 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02B-031/00 F02B-075/28 F01B-007/02 F02B-023/06 F02B-025/08
출원번호	US-0117831 (2012-05-16)
등록번호	US-9309807 (2016-04-12)
국제출원번호	PCT/US2012/038061 (2012-05-16)
§371/§102 date	20131114 (20131114)
국제공개번호	WO2012/158756 (2012-11-22)
발명자 / 주소	Burton, Tristan M. Redon, Fabien G.
출원인 / 주소	ACHATES POWER, INC.
대리인 / 주소	Meador, Terrance A.
인용정보	피인용 횟수 : 0 인용 특허 : 24

초록 ▼

An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber.

대표청구항 ▼

1. A combustion chamber construction for an internal combustion engine including at least one cylinder (120) with longitudinally-separated exhaust and intake ports (126, 124) and a pair of pistons disposed in opposition to one another in a bore of the cylinder, in which: the pistons have shaped end surfaces (182a, 182b) that define a combustion chamber (200) having an elongated tapered shape with at least one injection port (203) aligned with a major axis (202) of the combustion chamber when the pistons are near top dead center (TDC) positions in the cylinder; and,the cylinder includes at least one fuel injector port (165) extending in a radial direction of the cylinder at a location aligned with the injection port of the combustion chamber;in which the elongated tapered shape is defined between a first shape (183) in a first end surface (182a) and a second shape (186), complementary to the first shape, in the second end surface (182b); andin which the first end surface (182a) includes a bowl (183) defining a concave surface and the second end surface (182b) includes an elongated cleft (188), symmetrically curved in cross-section and generally elliptical in plan, formed in a convex surface (186). 2. An opposed-piston internal combustion engine including the combustion chamber construction of claim 1. 3. A method for operating an opposed-piston internal combustion engine including the combustion chamber of claim 1 by forming a combustion chamber (200) having an elongated tapered shape between the end surfaces of the pistons as the pistons move toward respective top dead center positions in the bore, generating respective tumbling motions (216) of charge air in the combustion chamber in response to swirling charge air (217), and injecting fuel (148) into the combustion chamber. 4. The method of claim 3, in which injecting a charge of fuel (148) into the combustion chamber includes injecting the fuel along a major axis (187, 202) of the elongated tapered shape. 5. The method of claim 4, in which injecting a charge of fuel into the combustion chamber includes injecting opposing sprays of fuel along the major axis. 6. The method of claim 3, in which generating respective tumble motions includes generating respective counter-rotating tumble motions at opposite ends of the combustion chamber. 7. The method of claim 6, in which injecting a charge of fuel into the combustion chamber includes injecting opposing sprays of fuel along the major axis. 8. The method of claim 7, in which a swirling motion (217) is imposed on charge air admitted into the bore before forming a combustion chamber (200, 400), a squish motion (212,214) is imposed on swirling charge air as the combustion chamber is formed, and the counter-rotating tumbling motions (216) are generated by interaction between the squish and swirling motions. 9. The method of claim 8, in which injecting a charge of fuel (148) into the charge of air includes injecting opposing sprays of fuel along a tumbling axis (187, 202) of rotation. 10. The method of claim 6, in which a swirling motion (217) is imposed on charge air admitted into the bore before forming a combustion chamber (200, 400), and the counter-rotating tumbling motions (216) are generated by interaction of the swirling motion with the end surfaces (182a,182b). 11. The method of claim 10, in which injecting a charge of fuel into the charge of air includes injecting opposing sprays of fuel along a tumbling axis of rotation. 12. The combustion chamber construction of claim 1, in which the combustion chamber has a cavity that comprises a concave dome-like cover (183) over an elongate trench (188), the elongate trench being symmetrically curved in cross-section, the concave dome-like cover provided by the bowl of first the first end surface (182a) and the elongate trench provided by the second end surface (182b). 13. The combustion chamber construction of claim 1, in which the elongated cleft has a major axis that is collinear with a diameter of the second end surface and the elongated cleft is symmetrical about its major axis.

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Fuqua, Kevin B.; Redon, Fabien G.; Shen, Huixian; Wahl, Michael H.; Lenski, Brendan M., Combustion chamber constructions for opposed-piston engines.
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Hofbauer, Peter, Combustion chamber promoting tumble flow.
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Ayumu Miyajima JP; Yoshio Okamoto JP; Yuzo Kadomukai JP; Shigenori Togashi JP; Tohru Ishikawa JP, Direct injection fuel injector and internal combustion engine mounting the same.
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Dion, Eric P.; Read, Iain J. L.; Redon, Fabien G.; Regner, Gerhard; Wahl, Michael H., EGR constructions for opposed-piston engines.
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Fuqua, Kevin B.; Redon, Fabien G.; Shen, Huixian; Wahl, Michael H., Fuel injection spray patterns for opposed-piston engines.
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Keating Edward J. (Mt. Morris MI), High squish dual swirl engine combustion chamber.
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Kaye ; Frank, I.C. engine having improved air or air-fuel induction system.
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Vachon, John T.; Hergart, Carl Anders, Internal combustion engine and operating method therefor.
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Rassey Louis J. (29048 Gloede Warren MI 48093), Internal combustion engine having opposed pistons.
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Stanton,Donald W.; Zehr,Randall L.; Eckerle,Wayne A.; Ntone,Francois, Internal combustion engine producing low emissions.
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Hofbauer Peter, Internal combustion engine with a single crankshaft and having opposed cylinders with opposed pistons.
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Poola,Ramesh B.; Gryfakis,Nicholas; Acosta,German A.; Beasley,John L.; Blase,James L.; Goetzke,Michael, Large-bore, medium-speed diesel engine having piston crown bowl with acute re-entrant angle.
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Paul Marius A. (1100 E. Orangethorpe Ave. ; Ste. 140 Anaheim CA 92801) Paul Ana (1100 E. Orangethorpe Ave. ; Ste. 140 Anaheim CA 92801), Low emission combustion system for internal combustion engines.
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Hull Francis R. (567 E. 26th St. Brooklyn NY 11232), Reciprocating 2-stroke cycle internal combustion engine.
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Spitzer Jeffrey J. ; Manzke Clifford A., Two-stroke diesel engine.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Combustion chamber constructions for opposed-piston engines 원문보기

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Combustion chamber constructions for opposed-piston engines 원문보기

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