GB629629A - Improvements in cams for operating valves of internal combustion engines - Google Patents
Improvements in cams for operating valves of internal combustion enginesInfo
- Publication number
- GB629629A GB629629A GB527047A GB527047A GB629629A GB 629629 A GB629629 A GB 629629A GB 527047 A GB527047 A GB 527047A GB 527047 A GB527047 A GB 527047A GB 629629 A GB629629 A GB 629629A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- sine wave
- curve
- valve
- cams
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
629,629. Valve-gear.. AUSTIN MOTOR CO., Ltd., and BISHOP, J. L. H. Feb. 24, 1947, No. 5270. [Class 7 (vi)] A valve-operating cam is designed so that the parts DE, EG, GH, Fig. 1, give an accelerating curve, Fig. 2, consisting of three half-period' sine waves DdE, EfG and GgH. The lift curve developed from the above acceleration curve, consists of portions corresponding to the parts DE and GH represented by an equation of the form y = -R sin mx. + nx i.e.. a negative sine wave combined with an ascending straight line and a portion corresponding to EG which is a halfperiod sine wave. Constant velocity ramps CD, and HJ may be provided at the ends of the operative part of the cam to take up the clearance. To allow for compression in the push rods during the acceleration periods DE and GH, and expansion of the rods in the parts EG, the amplitudes of the negative sine waves in the parts DE and GH and the positive sine wave in the part EG may be reduced. Specification 573,294 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB527047A GB629629A (en) | 1947-02-24 | 1947-02-24 | Improvements in cams for operating valves of internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB527047A GB629629A (en) | 1947-02-24 | 1947-02-24 | Improvements in cams for operating valves of internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB629629A true GB629629A (en) | 1949-09-23 |
Family
ID=9792928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB527047A Expired GB629629A (en) | 1947-02-24 | 1947-02-24 | Improvements in cams for operating valves of internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB629629A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0028859A1 (en) * | 1979-11-09 | 1981-05-20 | Grabowsky, Harald | Valve-control mechanism and machines including such a mechanism |
EP1666701A1 (en) * | 2003-08-25 | 2006-06-07 | Yamaha Hatsudoki Kabushiki Kaisha | Valve gear of internal combustion engine |
CN108223035A (en) * | 2017-12-30 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of design of cam contour line method |
CN110374706A (en) * | 2019-07-22 | 2019-10-25 | 湖州圣龙汽车动力***有限公司 | Engine symmetrical expression Valve-train Cam |
CN113279833A (en) * | 2021-07-09 | 2021-08-20 | 宁波大学 | Two-order continuous local adjustable symmetrical distribution cam profile combination design method |
CN113704909A (en) * | 2021-08-19 | 2021-11-26 | 第一拖拉机股份有限公司 | Method for designing motion law of cam follower and cam obtained by method |
-
1947
- 1947-02-24 GB GB527047A patent/GB629629A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0028859A1 (en) * | 1979-11-09 | 1981-05-20 | Grabowsky, Harald | Valve-control mechanism and machines including such a mechanism |
EP1666701A1 (en) * | 2003-08-25 | 2006-06-07 | Yamaha Hatsudoki Kabushiki Kaisha | Valve gear of internal combustion engine |
EP1666701A4 (en) * | 2003-08-25 | 2010-04-07 | Yamaha Motor Co Ltd | Valve gear of internal combustion engine |
CN108223035A (en) * | 2017-12-30 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of design of cam contour line method |
CN108223035B (en) * | 2017-12-30 | 2020-09-29 | 潍柴动力股份有限公司 | Cam profile design method |
CN110374706A (en) * | 2019-07-22 | 2019-10-25 | 湖州圣龙汽车动力***有限公司 | Engine symmetrical expression Valve-train Cam |
CN110374706B (en) * | 2019-07-22 | 2024-02-20 | 宁波圣龙五湖汽车零部件有限公司 | Symmetrical distribution cam molded line of engine |
CN113279833A (en) * | 2021-07-09 | 2021-08-20 | 宁波大学 | Two-order continuous local adjustable symmetrical distribution cam profile combination design method |
CN113279833B (en) * | 2021-07-09 | 2024-05-03 | 宁波大学 | Second-order continuous local adjustable symmetrical distribution cam profile combination design method |
CN113704909A (en) * | 2021-08-19 | 2021-11-26 | 第一拖拉机股份有限公司 | Method for designing motion law of cam follower and cam obtained by method |
CN113704909B (en) * | 2021-08-19 | 2023-11-21 | 第一拖拉机股份有限公司 | Design method of cam follower motion law and cam obtained by design method |
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