GB629500A - Improvements in cams for operating valves of internal combustion engines - Google Patents

Improvements in cams for operating valves of internal combustion engines

Info

Publication number
GB629500A
GB629500A GB2977547A GB2977547A GB629500A GB 629500 A GB629500 A GB 629500A GB 2977547 A GB2977547 A GB 2977547A GB 2977547 A GB2977547 A GB 2977547A GB 629500 A GB629500 A GB 629500A
Authority
GB
United Kingdom
Prior art keywords
valve
ramp
lift
cam
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
Application number
GB2977547A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Austin Motor Co Ltd
Original Assignee
Austin Motor Co Ltd
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
Application filed by Austin Motor Co Ltd filed Critical Austin Motor Co Ltd
Priority to GB2977547A priority Critical patent/GB629500A/en
Publication of GB629500A publication Critical patent/GB629500A/en
Expired legal-status Critical Current

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

629,500. Valve-gear. AUSTIN MOTOR CO., Ltd., BISHOP, J. L. H., and WEAVING, J. H. Nov. 8, 1947, No. 29775. [Class 7 (vi)] A valve-operating cam having an effective lifting portion DE is designed with an opening ramp CD, in which tappet clearance is taken up, consisting of a small accelerating portion OG on the lift curve, Fig. 5, followed by a portion GH obtained by plotting a sine curve on a sloping straight line. The ramp ends with a constant velocity portion HJ during which the valve begins to lift. The effect of the design is that at the end of the ramp the velocity of lift is kept very small. The cam is provided with a similar closing ramp EF. In Fig. 8 a valve P is operated by the cam through a tappet comprising telescoping parts N, R, urged apart by a spring S.
GB2977547A 1947-11-08 1947-11-08 Improvements in cams for operating valves of internal combustion engines Expired GB629500A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2977547A GB629500A (en) 1947-11-08 1947-11-08 Improvements in cams for operating valves of internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2977547A GB629500A (en) 1947-11-08 1947-11-08 Improvements in cams for operating valves of internal combustion engines

Publications (1)

Publication Number Publication Date
GB629500A true GB629500A (en) 1949-09-21

Family

ID=10296981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2977547A Expired GB629500A (en) 1947-11-08 1947-11-08 Improvements in cams for operating valves of internal combustion engines

Country Status (1)

Country Link
GB (1) GB629500A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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