SE7605400L - TWO-STEP ENGINE - Google Patents

TWO-STEP ENGINE

Info

Publication number
SE7605400L
SE7605400L SE7605400A SE7605400A SE7605400L SE 7605400 L SE7605400 L SE 7605400L SE 7605400 A SE7605400 A SE 7605400A SE 7605400 A SE7605400 A SE 7605400A SE 7605400 L SE7605400 L SE 7605400L
Authority
SE
Sweden
Prior art keywords
air
piston
crank
chamber
case
Prior art date
Application number
SE7605400A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE435742B (en
Inventor
J Ehrlich
Original Assignee
Outboard Marine Corp
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
Priority claimed from US05/579,808 external-priority patent/US4026254A/en
Application filed by Outboard Marine Corp filed Critical Outboard Marine Corp
Publication of SE7605400L publication Critical patent/SE7605400L/en
Publication of SE435742B publication Critical patent/SE435742B/en

Links

Classifications

    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of 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
    • 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
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Supercharger (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

1535258 Two-stroke engines OUTBOARD MARINE CORP 28 April 1976 [22 May 1975 20 Feb 1976] 17357/76 Heading F1B A chamber 51, 251 is supplied with air during a first part of the piston reciprocation adjacent t.d.c. in response to sub-atmospheric pressure, isolated from the cylinder 15, 215 and crank-case 17, 217 during a subsequent second part of the piston stroke from t.d.c., opened to the cylinder on a third part of the stroke and on the final part of the stroke fuel is supplied to the cylinder. In the embodiment of Figs. 2 and 3 the chamber is subject to crank-case suction via a cylinder port 61 and piston skirt notch 63 adjacent t.d.c. and air is drawn into the chamber through reed valves 59. Subsequently the piston 19 uncovers an exhaust port 25 and a port 65 in the piston connects the crank-case 17 to the port 61, preferably just prior to opening of the chamber ports 53 to the cylinder 15, so that air in the chamber 51 is pressurized and flows into the cylinder to scavenge the exhaust gases. The piston then uncovers transfer ports (31), Fig. 1 (not shown), of transfer passages (29), open permanently to the crank-case, for flow of fuel-air mixture. In the embodiment of Figs. 7 and 11 the chamber 251 has air discharge ports 253 which are opened, for discharge of air drawn into the chamber adjacent piston t.d.c. and heated during isolation of the air from the crank-case 217, prior to communication of a piston port 275 with a mixture transfer port 257 and thus communication of the chamber with the crank-case. Mixture is drawn into the crank-case 217 from a carburetter 231 via a reed valve 235 which opens at a lower pressure than the air inlet reed valves 283. A camshaft operated valve system or a rotary valve could provide the timed communications. The air or mixture could be pumped by a stepped piston or a blower and/or a stepped piston could provide the sub-atmospheric pressure. The crank-case mixture may be produced by fuel injection into air drawn into the crank-case through the chamber 251. Air may be introduced subsequent to initial mixture introduction to the cylinder to provide a stratified charge. The engine may be cross or loop scavenged.
SE7605400A 1975-05-22 1976-05-12 PROCEDURE FOR OPERATION OF COMBUSTION ENGINE AND COMBUSTION ENGINE THEREOF SE435742B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/579,808 US4026254A (en) 1975-05-22 1975-05-22 Two stroke internal combustion engine and method of operation thereof
US05/659,736 US4067302A (en) 1975-05-22 1976-02-20 Two-stroke internal combustion engine and method of operation thereof

Publications (2)

Publication Number Publication Date
SE7605400L true SE7605400L (en) 1976-11-23
SE435742B SE435742B (en) 1984-10-15

Family

ID=27077871

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7605400A SE435742B (en) 1975-05-22 1976-05-12 PROCEDURE FOR OPERATION OF COMBUSTION ENGINE AND COMBUSTION ENGINE THEREOF

Country Status (7)

Country Link
JP (1) JPS602492B2 (en)
BR (1) BR7603266A (en)
DE (1) DE2621628C2 (en)
FR (1) FR2311929A1 (en)
GB (1) GB1535258A (en)
IT (1) IT1066079B (en)
SE (1) SE435742B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479904A1 (en) * 1980-04-04 1981-10-09 Enfroy Daniel Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase
GB2083550B (en) * 1980-08-29 1984-05-16 Outboard Marine Corp Scavening two-stroke internal combustion engines
FR2520803B1 (en) * 1982-02-03 1987-02-20 Pailler Yves TRANSFER ENGINE SUPERIOR TO EXHAUST WITH SECONDARY CHANNELS AND RELATED DECOMPRESSION CHAMBERS
EP0115758A1 (en) * 1983-01-07 1984-08-15 Alfred Rabl Port-controlled two-stroke internal combustion engine
DE102007034181B4 (en) 2006-08-30 2018-05-30 Dolmar Gmbh Two-stroke engine with an improved overflow channel
GB201517273D0 (en) * 2015-09-30 2015-11-11 Univ Manchester Resist composition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199051B (en) * 1965-08-19 Bristol Siddeley Ehrlich Engineering Ltd., Bristol (Großbritannien) Slot-controlled two-stroke internal combustion engine
US1113456A (en) * 1910-07-27 1914-10-13 James Mcintosh Gas-engine.
DE532584C (en) * 1930-03-04 1931-08-31 Gustav Schulze Slot-controlled mixture-compressing two-stroke internal combustion engine
US3687118A (en) * 1969-07-14 1972-08-29 Yamaha Hatsudaki Kk Crank chamber compression-type two-cycle engine

Also Published As

Publication number Publication date
BR7603266A (en) 1977-02-01
IT1066079B (en) 1985-03-04
GB1535258A (en) 1978-12-13
FR2311929A1 (en) 1976-12-17
DE2621628A1 (en) 1976-12-09
FR2311929B1 (en) 1982-11-05
DE2621628C2 (en) 1987-03-19
SE435742B (en) 1984-10-15
JPS602492B2 (en) 1985-01-22
AU1352576A (en) 1977-11-03
JPS51144820A (en) 1976-12-13

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