GB1345074A - Variable compression ratio internal combustion engines - Google Patents

Variable compression ratio internal combustion engines

Info

Publication number
GB1345074A
GB1345074A GB3604171A GB3604171A GB1345074A GB 1345074 A GB1345074 A GB 1345074A GB 3604171 A GB3604171 A GB 3604171A GB 3604171 A GB3604171 A GB 3604171A GB 1345074 A GB1345074 A GB 1345074A
Authority
GB
United Kingdom
Prior art keywords
piston
engine
compression ratio
lever
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3604171A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SNECMA SAS filed Critical SNECMA SAS
Publication of GB1345074A publication Critical patent/GB1345074A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

1345074 Two and four-stroke engines SOC NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION 30 July 1971 [3 Aug 1970] 36041/71 Heading F1B An auxiliary piston 9 in the head 3 of the main cylinder 1 has a variable stroke so that the compression ratio of the engine may be adjusted. In a four-stroke engine the piston 9 is operated through a rod 17 and a lever 18 from a crankpin 16 on the engine cam-shaft 7 and the pivot 19 of the lever is adjustable in position by an arm 21 on a shaft 22. The piston 9 reaches T.D.C. I at T.D.C. of the main piston 2 or up to 90 degrees of crank angle before and B.D.C. of the piston 9 is adjustable between a position II providing the maximum compression ratio and a position III providing the minimum compression ratio. The piston 9 may define one end wall of a chamber 12 having a fuel injector 13 and opening to the cylinder 1 through an orifice 14. The auxiliary cylinder 8 may open over its full cross-section to the cylinder 1, Fig.2 (not shown). In a twostroke engine the auxiliary piston is reciprocated at the same rate as the main piston and T.D.C. of the auxiliary piston occurs during scavenging, e.g. at B.D.C. of the main piston. The piston 9 may be operated from the cam-shaft 7 through a linkage, Fig.7 (not shown), including a lever (25) having one end pivoted to the piston rod (29) and the other end formed with an elongated aperture (27). A spindle (28) in the lever aperture (27) is adjustable by a device (11) in accordance with the pressure measured by a sensor in the crown of the auxiliary piston to vary the engine compression ratio. The engine may be supercharged and have a plurality of cylinders.
GB3604171A 1970-08-03 1971-07-30 Variable compression ratio internal combustion engines Expired GB1345074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7028621A FR2102430A5 (en) 1970-08-03 1970-08-03

Publications (1)

Publication Number Publication Date
GB1345074A true GB1345074A (en) 1974-01-30

Family

ID=9059718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3604171A Expired GB1345074A (en) 1970-08-03 1971-07-30 Variable compression ratio internal combustion engines

Country Status (3)

Country Link
US (1) US3741175A (en)
FR (1) FR2102430A5 (en)
GB (1) GB1345074A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173855A (en) * 1985-03-25 1986-10-22 Stephen Peer Variable volume stratified charge engine
GB2183727A (en) * 1985-11-27 1987-06-10 Stephen Peer Variable volume pre-chamber diesel engine
GB2462494A (en) * 2008-08-15 2010-02-17 Connaught Motor Company Ltd A variable compression ratio engine using a secondary piston

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52118110A (en) * 1976-03-29 1977-10-04 Nippon Soken Inc Combustion chamber apparatus of internal combustion engine
DE2705339A1 (en) * 1977-02-09 1978-08-10 Volkswagenwerk Ag MIXED COMPRESSING, EXTERNAL IGNITION COMBUSTION MACHINE WITH COMBINED THROTTLE AND COMPRESSION CONTROL
US4169435A (en) * 1977-06-23 1979-10-02 Faulconer Edward L Jr Internal combustion engine and method
US4137873A (en) * 1977-10-11 1979-02-06 Caswell Sr Dwight A Variable compression ratio piston
US4191139A (en) * 1978-06-05 1980-03-04 Tompkins Vincent J Engine with secondary pistons
SE422969B (en) * 1978-06-15 1982-04-05 Erik Alvar Gustavsson SET AND DEVICE FOR INCREASING THE EFFECT OF A COMBUSTION ENGINE AND REDUCING ITS POLLUTIONS
US4313403A (en) * 1979-09-07 1982-02-02 Bie Jr Norman Internal combustion engine
LU84574A1 (en) * 1983-01-04 1984-10-24 Gilbert Van Avermaete COMBUSTION ENGINE
US4708096A (en) * 1986-02-24 1987-11-24 Joseph Mroz Internal combustion engine
US4890585A (en) * 1988-11-28 1990-01-02 General Electric Company Internal combustion engine with valve
US5031582A (en) * 1989-04-26 1991-07-16 Volkswagen Ag Internal combustion engine providing scavenging with combustion chamber volume control
FR2647508A1 (en) * 1989-05-26 1990-11-30 Jurkovic Dimitri Internal combustion engine with a variable compression ratio
US4977873A (en) * 1989-06-08 1990-12-18 Clifford L. Elmore Timing chamber ignition method and apparatus
US5109817A (en) * 1990-11-13 1992-05-05 Altronic, Inc. Catalytic-compression timed ignition
GB2286633B (en) * 1992-08-10 1997-11-12 Mark Alan Cherry Method and apparatus for compression timed ignition
US5297518A (en) * 1992-08-10 1994-03-29 Cherry Mark A Mass controlled compression timed ignition method and igniter
GB9605557D0 (en) * 1996-03-16 1996-05-15 Univ Coventry Internal combustion engine
US6230671B1 (en) 1998-11-02 2001-05-15 Raymond C. Achterberg Variable compression and asymmetrical stroke internal combustion engine
ATE371103T1 (en) * 2000-11-29 2007-09-15 Kenneth W Cowans HIGH PERFORMANCE ENGINE WITH VARIABLE COMPRESSION RATIO AND VARIABLE CHARGE (VCRC ENGINE)
US6708655B2 (en) 2002-04-15 2004-03-23 Caterpillar Inc Variable compression ratio device for internal combustion engine
US6752105B2 (en) 2002-08-09 2004-06-22 The United States Of America As Represented By The Administrator Of The United States Environmental Protection Agency Piston-in-piston variable compression ratio engine
FR2853354B1 (en) * 2003-04-04 2006-06-09 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE WITH DIRECT FUEL INJECTION AND IGNITION CONTROL
FR2853358B1 (en) * 2003-04-04 2005-05-06 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE WITH GASOLINE AND SELF IGNITION
BRPI0511202A (en) * 2004-05-26 2007-11-27 Zengli Yang four-stroke internal combustion engine and ultra-expansion
US7765785B2 (en) * 2005-08-29 2010-08-03 Kashmerick Gerald E Combustion engine
US20070199299A1 (en) * 2005-08-29 2007-08-30 Kashmerick Gerald E Combustion Engine
US20070256658A1 (en) * 2006-03-06 2007-11-08 Andersson Per G E Combined variable compression ratio and passive ignition system
CN102808691A (en) * 2011-06-27 2012-12-05 摩尔动力(北京)技术股份有限公司 Heat power system for U-flow piston of piston-control cylinder
US20150083084A1 (en) * 2013-09-23 2015-03-26 Behnam Nedaie Friction reduction and variable compression ratio

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173855A (en) * 1985-03-25 1986-10-22 Stephen Peer Variable volume stratified charge engine
GB2183727A (en) * 1985-11-27 1987-06-10 Stephen Peer Variable volume pre-chamber diesel engine
GB2462494A (en) * 2008-08-15 2010-02-17 Connaught Motor Company Ltd A variable compression ratio engine using a secondary piston

Also Published As

Publication number Publication date
FR2102430A5 (en) 1972-04-07
DE2137596B2 (en) 1976-11-11
US3741175A (en) 1973-06-26
DE2137596A1 (en) 1972-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee