GB767645A - Improvements in, or relating to valve gear for four stroke internal combustion engines - Google Patents

Improvements in, or relating to valve gear for four stroke internal combustion engines

Info

Publication number
GB767645A
GB767645A GB7285/55A GB728555A GB767645A GB 767645 A GB767645 A GB 767645A GB 7285/55 A GB7285/55 A GB 7285/55A GB 728555 A GB728555 A GB 728555A GB 767645 A GB767645 A GB 767645A
Authority
GB
United Kingdom
Prior art keywords
sleeve
shaft
adjustment
cams
valve gear
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
GB7285/55A
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.)
RENE LOUIS MARTIN
Original Assignee
RENE LOUIS MARTIN
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 RENE LOUIS MARTIN filed Critical RENE LOUIS MARTIN
Publication of GB767645A publication Critical patent/GB767645A/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
    • F01L1/34413—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 composite camshafts, e.g. with cams being able to move relative to the camshaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

767,645. Valve gear; regulating. MARTIN, R. L. March 11, 1955 [April 1, 1954], No. 7285/55. Class 7 (6). A cam-shaft arrangement for a four-stroke engine having inlet and outlet valves operated by separate sets of cams comprises an inner shaft a carrying the exhaust cams c which project through slots t in an outer sleeve b carrying the inlet cams d, the slots t permitting angular adjustment of the inner shaft a relative to the outer sleeve b. The sleeve b is driven by a sprocket w and drives the shaft a through a splined sleeve m engaging straight splines p<SP>1</SP> on the sleeve b and helical spines q<SP>1</SP> on the shaft a whereby axial adjustment of the sleeve rotates shaft a relative to the sleeve b. This adjustment is preferably sufficient to cause the engine to act as a compressor for braking purposes, a toggle device consisting of two springs s Fig. 7 on the sleeve m engaging a lozenge-shaped projection l on the shaft a ensuring that the adjustment means for the sleeve m snaps past a dead-centre position into either the normal running or braking position.
GB7285/55A 1954-04-01 1955-03-11 Improvements in, or relating to valve gear for four stroke internal combustion engines Expired GB767645A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR767645X 1954-04-01

Publications (1)

Publication Number Publication Date
GB767645A true GB767645A (en) 1957-02-06

Family

ID=9183890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7285/55A Expired GB767645A (en) 1954-04-01 1955-03-11 Improvements in, or relating to valve gear for four stroke internal combustion engines

Country Status (1)

Country Link
GB (1) GB767645A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686754A2 (en) * 1994-05-12 1995-12-13 Carraro S.P.A. A single shaft timing system, particularly for internal combustion engines
WO2008056181A1 (en) * 2006-11-06 2008-05-15 Mechadyne Plc Valve mechanism for an engine
DE19623818C5 (en) * 1995-06-14 2009-01-08 Denso Corp., Kariya-shi Rotary or angular phase control device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686754A2 (en) * 1994-05-12 1995-12-13 Carraro S.P.A. A single shaft timing system, particularly for internal combustion engines
EP0686754A3 (en) * 1994-05-12 1996-04-10 Carraro Spa A single shaft timing system, particularly for internal combustion engines
DE19623818C5 (en) * 1995-06-14 2009-01-08 Denso Corp., Kariya-shi Rotary or angular phase control device
WO2008056181A1 (en) * 2006-11-06 2008-05-15 Mechadyne Plc Valve mechanism for an engine
US7895979B2 (en) 2006-11-06 2011-03-01 Mechadyne Plc Valve mechanism for an engine

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