GB619196A - Improvements in or relating to two-cycle internal combustion engines - Google Patents
Improvements in or relating to two-cycle internal combustion enginesInfo
- Publication number
- GB619196A GB619196A GB35043/46A GB3504346A GB619196A GB 619196 A GB619196 A GB 619196A GB 35043/46 A GB35043/46 A GB 35043/46A GB 3504346 A GB3504346 A GB 3504346A GB 619196 A GB619196 A GB 619196A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- ports
- crank
- movement
- piston
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L5/00—Slide valve-gear or valve-arrangements
- F01L5/04—Slide valve-gear or valve-arrangements with cylindrical, sleeve, or part-annularly shaped valves
- F01L5/06—Slide valve-gear or valve-arrangements with cylindrical, sleeve, or part-annularly shaped valves surrounding working cylinder or piston
- F01L5/08—Arrangements with several movements or several valves, e.g. one valve inside the other
- F01L5/10—Arrangements with several movements or several valves, e.g. one valve inside the other with reciprocating and other movements of the same valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Transmission Devices (AREA)
Abstract
619,196. Two-stroke engines. SPARMANN, E. E. K. Nov. 26, 1946, No. 35043. Convention date, Nov. 27, 1945. [Classes 7 (ii) and 7 (vi)] A two-stroke internal-combustion engine has one or more cylinders 1 with upper exhaust ports 18 and lower inlet ports 19 coacting respectively with ports 20, 21 in a sleeve valve 4 surrounding the piston 5 which controls the ports 21, the sleeve valve being oscillated with a combined axial and rotary movement arranged to provide greater axial acceleration during the scavenging period than during the compression and expansion period. The upper part of the sleeve valve slides in a space 3 between the cylinder head and the cylinder. A control shaft 9 driven at the same speed as the crank shaft 7 and in either direction oscillates an arm 13 pivoted at 14 and connected through sliding and universal connections 15 to the sleeve valve to which a combined rotary and axial oscillation is thus imparted, the rotary component increasing towards the upper limit of the valve travel. The phase of the crank 9 is somewhat more than 180 degrees in advance of the crank 7 so that the axial acceleration of valve 4 is at a maximum, Fig. 2, when the valve is at the bottom of its stroke, at a time when the piston, also near the bottom of its stroke, has a relatively smaller acceleration. The slight lead of the valve is shown in Fig. 3, where the piston is starting upwards on its compression stroke and the inlet ports are open. When the crank reaches 85 degrees beyond its lower dead centre the piston overtakes the valve and closes the inlet ports and compression ensues. The exhaust opens about 70 degrees before lower dead centre and 40 degrees later the inlet valve opens and scavenging occurs and continues for about 60 degrees of crank movement. The path of the pin 16 is such that most of the rotary movement of the sleeve valve occurs near the upper limits of movement when the ports are closed. In a modification, Fig. 5, particularly for radial engines, the valve is operated from a crank pin 10 on the main shaft connected through the linkage shown to a rocking-lever 13 pivoted at 14 and connected to the valve at 15. In this form the scavenging air enters by ports 19<11>, and the combustible mixture by upper ports 191. The two sets of ports may have guide vanes inclined in opposite directions. In another modification, Fig. 8, having cylinders parallel to the power shaft 7, and pistons connected to a wobbler plate 27, a link 11 connected to the wobbler plate at 10 is also connected to a link 16 supported by pivoted links 30, 32 and connected to the sleeve valve at 15. The path 150 of the pin 15 shows that the rotary part of the valve movement is almost entirely limited to the upper end part of the travel. The required advance of the valve movement is obtained by the relative disposition of the part 10 and the piston connection point 8. Specification 506,326 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE619196X | 1945-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB619196A true GB619196A (en) | 1949-03-04 |
Family
ID=20313233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35043/46A Expired GB619196A (en) | 1945-11-27 | 1946-11-26 | Improvements in or relating to two-cycle internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB619196A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3405893A1 (en) * | 1984-02-18 | 1985-08-22 | Ludwig 8543 Hilpoltstein Wenker | INTERNAL COMBUSTION ENGINE |
DE3736633A1 (en) * | 1987-10-29 | 1989-05-11 | Engelbert Hakvoort | Two-stroke internal combustion engine |
-
1946
- 1946-11-26 GB GB35043/46A patent/GB619196A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3405893A1 (en) * | 1984-02-18 | 1985-08-22 | Ludwig 8543 Hilpoltstein Wenker | INTERNAL COMBUSTION ENGINE |
DE3736633A1 (en) * | 1987-10-29 | 1989-05-11 | Engelbert Hakvoort | Two-stroke internal combustion engine |
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