GB1450800A - Two-stroke internal combustion engines with reverse scavenging - Google Patents
Two-stroke internal combustion engines with reverse scavengingInfo
- Publication number
- GB1450800A GB1450800A GB4549073A GB4549073A GB1450800A GB 1450800 A GB1450800 A GB 1450800A GB 4549073 A GB4549073 A GB 4549073A GB 4549073 A GB4549073 A GB 4549073A GB 1450800 A GB1450800 A GB 1450800A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ports
- scavenging
- exhaust ports
- main
- cylinder
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- 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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Supercharger (AREA)
Abstract
1450800 Cylinder ports SULZER BROS Ltd 28 Sept 1973 [28 Sept 1972] 45490/73 Heading F1B A two-stroke I.C. engine with reverse scavenging has a port system for the or each cylinder which comprises a row of exhaust ports 4, 6 extending in the circumferential direction of the cylinder and a row of scavenging ports 5, 8 also extending circumferentially, each of the two rows extending only partly round the cylinder and being symmetrical about a common axial line, each of the ports extending in a plane which is substantially normal to the piston axis, the row of exhaust ports lying closer to the cylinder head than the row of scavenging ports, the row of scavenging ports being divided into three groups, a first group (main scavenging ports 5) lying between the other two groups (auxiliary scavenging ports 8), the latter 8 having smaller axial dimensions than the former 5, the row of exhaust ports being divided into three groups, a first group (auxiliary exhaust ports 6) lying between the other two groups (main exhaust ports 4) which have a greater axial dimension than the auxiliary exhaust ports and each group of main exhaust ports being located adjacent one of the transitions between the main and auxiliary scavenging ports. The exhaust ports lead into a duct 7 and the angle subtended at the cylinder axis by the complete group of exhaust ports is 170 to 180 degrees. The auxiliary exhaust ports 6 and the two main exhaust ports 4 which are nearer to the axis of symmetry of the exhaust ports, are radial relative to the cylinder axis and the axis of the two outer main exhaust ports are each parallel to the adjacent port. The main scavenging ports are disposed around a sector of 120 to 130 degrees and the main and auxiliary ports together are disposed around a sector of 260 to 270 degrees. The total crosssectional area of all the exhaust ports is one-half of the total area of all the scavenging ports. The area of the main scavenging ports is 0À65 to 0À7 of the total area of all the scavenging ports. The lower edges of the scavenging ports 5 and 8 are level with the control edge of the piston at B.D.C. The distance "B" is 27% of the piston stroke, the distance "C" is one to two per cent of the stroke and the distance "D" between any vertically aligned pair of ports is 6% of the stroke.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1415872A CH561356A5 (en) | 1972-09-28 | 1972-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1450800A true GB1450800A (en) | 1976-09-29 |
Family
ID=4398464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4549073A Expired GB1450800A (en) | 1972-09-28 | 1973-09-28 | Two-stroke internal combustion engines with reverse scavenging |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS522044B2 (en) |
| CH (1) | CH561356A5 (en) |
| DE (1) | DE2248559C2 (en) |
| ES (1) | ES418456A1 (en) |
| FR (1) | FR2201713A5 (en) |
| GB (1) | GB1450800A (en) |
| IT (1) | IT993445B (en) |
| NL (1) | NL7213909A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587098Y2 (en) * | 1977-05-10 | 1983-02-07 | 三菱電機株式会社 | engine ignition system |
| AT394754B (en) * | 1988-02-29 | 1992-06-25 | Yamaha Motor Europ | Two-stroke internal combustion engine with crankcase purging (flushing) |
-
1972
- 1972-09-28 CH CH1415872A patent/CH561356A5/xx not_active IP Right Cessation
- 1972-10-04 DE DE19722248559 patent/DE2248559C2/en not_active Expired
- 1972-10-13 NL NL7213909A patent/NL7213909A/xx unknown
-
1973
- 1973-09-04 ES ES418456A patent/ES418456A1/en not_active Expired
- 1973-09-05 FR FR7331997A patent/FR2201713A5/fr not_active Expired
- 1973-09-11 JP JP10256973A patent/JPS522044B2/ja not_active Expired
- 1973-09-27 IT IT2943973A patent/IT993445B/en active
- 1973-09-28 GB GB4549073A patent/GB1450800A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2201713A5 (en) | 1974-04-26 |
| IT993445B (en) | 1975-09-30 |
| DE2248559C2 (en) | 1974-01-03 |
| ES418456A1 (en) | 1976-04-01 |
| NL7213909A (en) | 1974-04-01 |
| JPS522044B2 (en) | 1977-01-19 |
| CH561356A5 (en) | 1975-04-30 |
| JPS4993721A (en) | 1974-09-06 |
| DE2248559B1 (en) | 1973-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |