GB2333578A - Phase change mechanism - Google Patents

Phase change mechanism

Info

Publication number
GB2333578A
GB2333578A GB9908375A GB9908375A GB2333578A GB 2333578 A GB2333578 A GB 2333578A GB 9908375 A GB9908375 A GB 9908375A GB 9908375 A GB9908375 A GB 9908375A GB 2333578 A GB2333578 A GB 2333578A
Authority
GB
United Kingdom
Prior art keywords
cam
wedges
cam plate
central axis
plate
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.)
Withdrawn
Application number
GB9908375A
Other versions
GB9908375D0 (en
Inventor
Derek Frost
David Crabb
Timothy Mark Lancefield
Mark Eaton
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.)
Mechadyne International Ltd
Original Assignee
Mechadyne International 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
Priority claimed from GBGB9621561.1A external-priority patent/GB9621561D0/en
Application filed by Mechadyne International Ltd filed Critical Mechadyne International Ltd
Priority to GB9908375A priority Critical patent/GB2333578A/en
Publication of GB9908375D0 publication Critical patent/GB9908375D0/en
Publication of GB2333578A publication Critical patent/GB2333578A/en
Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/10—Couplings with means for varying the angular relationship of two coaxial shafts during motion

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A phase change mechanism (10) is described for coupling a drive member (12) to a driven member (14). The mechanism comprises a cam plate (30) rotatable about the central axis of the mechanism and having cam surfaces (30a) that lie on opposite sides of the central axis and that are oppositely ramped in the axial direction. Cam wedges (54) are mounted for axial movement relative to the cam plate, each cam wedge having a cam surface (54a) engaging a respective one of the cam surfaces (30a) on the cam plate (30). Each wedge (54) is also pivotable at its end remote from the cam surface (54a) about an axis generally parallel to, and radially offset from, the central axis. A hydraulic jack is provided to cause relative axial movement between the cam wedges (54) and the cam plate (30), the engagement of the cam surfaces (54a) of the cam wedges (54) and the cam plate (30) causing the cam plate (30) to rotate about the central axis in response to the relative axis movement, the wedges (54) at the same time pivoting to maintain area contact between the cam surfaces on the wedges (54) and the cam plate (30). The cam wedges (54) or the cam surfaces (30a) on the cam plate (30) are allowed to rock to maintain surface contact.
GB9908375A 1996-10-16 1997-10-09 Phase change mechanism Withdrawn GB2333578A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9908375A GB2333578A (en) 1996-10-16 1997-10-09 Phase change mechanism

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9621561.1A GB9621561D0 (en) 1996-10-16 1996-10-16 Phase change mechanism
PCT/GB1997/002781 WO1998016725A1 (en) 1996-10-16 1997-10-09 Phase change mechanism
GB9908375A GB2333578A (en) 1996-10-16 1997-10-09 Phase change mechanism

Publications (2)

Publication Number Publication Date
GB9908375D0 GB9908375D0 (en) 1999-06-09
GB2333578A true GB2333578A (en) 1999-07-28

Family

ID=26310239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9908375A Withdrawn GB2333578A (en) 1996-10-16 1997-10-09 Phase change mechanism

Country Status (1)

Country Link
GB (1) GB2333578A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228417A (en) * 1991-04-30 1993-07-20 Atsugi Unisia Corp. Valve timing control system of internal combustion engine
US5263442A (en) * 1991-07-31 1993-11-23 Atsugi Unisia Corporation Valve timing control apparatus
DE4323671A1 (en) * 1993-07-15 1995-01-19 Schaeffler Waelzlager Kg Continuously variable camshaft adjustment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228417A (en) * 1991-04-30 1993-07-20 Atsugi Unisia Corp. Valve timing control system of internal combustion engine
US5263442A (en) * 1991-07-31 1993-11-23 Atsugi Unisia Corporation Valve timing control apparatus
DE4323671A1 (en) * 1993-07-15 1995-01-19 Schaeffler Waelzlager Kg Continuously variable camshaft adjustment

Also Published As

Publication number Publication date
GB9908375D0 (en) 1999-06-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)