GB1535258A - Internal combustion engines and method of operation thereof - Google Patents
Internal combustion engines and method of operation thereofInfo
- Publication number
- GB1535258A GB1535258A GB1735776A GB1735776A GB1535258A GB 1535258 A GB1535258 A GB 1535258A GB 1735776 A GB1735776 A GB 1735776A GB 1735776 A GB1735776 A GB 1735776A GB 1535258 A GB1535258 A GB 1535258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- piston
- crank
- chamber
- case
- 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
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)
- Supercharger (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (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.
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 (1)
| Publication Number | Publication Date |
|---|---|
| GB1535258A true GB1535258A (en) | 1978-12-13 |
Family
ID=27077871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1735776A Expired GB1535258A (en) | 1975-05-22 | 1976-04-28 | Internal combustion engines and method of operation thereof |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS602492B2 (en) |
| BR (1) | BR7603266A (en) |
| DE (1) | DE2621628A1 (en) |
| FR (1) | FR2311929A1 (en) |
| GB (1) | GB1535258A (en) |
| IT (1) | IT1066079B (en) |
| SE (1) | SE435742B (en) |
Families Citing this family (6)
| 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)
| 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 |
-
1976
- 1976-04-28 GB GB1735776A patent/GB1535258A/en not_active Expired
- 1976-05-07 FR FR7613696A patent/FR2311929A1/en active Granted
- 1976-05-12 SE SE7605400A patent/SE435742B/en not_active IP Right Cessation
- 1976-05-14 DE DE19762621628 patent/DE2621628A1/en active Granted
- 1976-05-21 IT IT4960676A patent/IT1066079B/en active
- 1976-05-21 BR BR7603266A patent/BR7603266A/en unknown
- 1976-05-22 JP JP5957076A patent/JPS602492B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51144820A (en) | 1976-12-13 |
| SE7605400L (en) | 1976-11-23 |
| DE2621628C2 (en) | 1987-03-19 |
| IT1066079B (en) | 1985-03-04 |
| FR2311929B1 (en) | 1982-11-05 |
| SE435742B (en) | 1984-10-15 |
| JPS602492B2 (en) | 1985-01-22 |
| DE2621628A1 (en) | 1976-12-09 |
| AU1352576A (en) | 1977-11-03 |
| BR7603266A (en) | 1977-02-01 |
| FR2311929A1 (en) | 1976-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940428 |