GB839971A - Improvements in or relating to internal combustion or like engines - Google Patents

Improvements in or relating to internal combustion or like engines

Info

Publication number
GB839971A
GB839971A GB1311555A GB1311555A GB839971A GB 839971 A GB839971 A GB 839971A GB 1311555 A GB1311555 A GB 1311555A GB 1311555 A GB1311555 A GB 1311555A GB 839971 A GB839971 A GB 839971A
Authority
GB
United Kingdom
Prior art keywords
cams
cam
shaft
grooves
pair
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
GB1311555A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1311555A priority Critical patent/GB839971A/en
Publication of GB839971A publication Critical patent/GB839971A/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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34416—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using twisted cams
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

839,971. Regulating; valve gear. JAWDAT, N. A. Aug. 7, 1956 [May 5, 1955], No. 13115/55. Class 7(6) An axially adjustable camshaft 11 is provided with a pair of cams 14, 15, associated with each push rod 19, the valve tappets 21 being provided with balls 25 comprising cam followers which engage in grooves in the faces of the cams 14, 15, which grooves are interconnected by a helical groove 16 by which the follower moves from one cam to the other when the cam shaft is moved axially. The shaft may be moved by manual means or by governor means responsive to intake manifold pressure or engine speed. The cam shaft is positively located in its correct positions for operating with the cams 14 or the cams 15 by spring- loaded balls 27 engaging grooves 31, 32 in the shaft. One cam profile of each pair may be designed to give a longer valve timing overlap for maximum torque at medium engine speeds and the other minimum overlap for idling speeds.
GB1311555A 1955-05-05 1955-05-05 Improvements in or relating to internal combustion or like engines Expired GB839971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1311555A GB839971A (en) 1955-05-05 1955-05-05 Improvements in or relating to internal combustion or like engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1311555A GB839971A (en) 1955-05-05 1955-05-05 Improvements in or relating to internal combustion or like engines

Publications (1)

Publication Number Publication Date
GB839971A true GB839971A (en) 1960-06-29

Family

ID=10017090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1311555A Expired GB839971A (en) 1955-05-05 1955-05-05 Improvements in or relating to internal combustion or like engines

Country Status (1)

Country Link
GB (1) GB839971A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639802U (en) * 1979-09-05 1981-04-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639802U (en) * 1979-09-05 1981-04-14

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