GB2301396A - Variable timing camshaft with variable valve list - Google Patents

Variable timing camshaft with variable valve list

Info

Publication number
GB2301396A
GB2301396A GB9614003A GB9614003A GB2301396A GB 2301396 A GB2301396 A GB 2301396A GB 9614003 A GB9614003 A GB 9614003A GB 9614003 A GB9614003 A GB 9614003A GB 2301396 A GB2301396 A GB 2301396A
Authority
GB
United Kingdom
Prior art keywords
varied
timing
variable
camshaft
valve
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.)
Granted
Application number
GB9614003A
Other versions
GB2301396B (en
GB9614003D0 (en
Inventor
Stephen Keith Madden
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
Priority claimed from AUPM3228A external-priority patent/AUPM322894A0/en
Priority claimed from AUPM4536A external-priority patent/AUPM453694A0/en
Priority claimed from AUPM6505A external-priority patent/AUPM650594A0/en
Priority claimed from AUPM6827A external-priority patent/AUPM682794A0/en
Application filed by Individual filed Critical Individual
Publication of GB9614003D0 publication Critical patent/GB9614003D0/en
Publication of GB2301396A publication Critical patent/GB2301396A/en
Application granted granted Critical
Publication of GB2301396B publication Critical patent/GB2301396B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/348—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 by means acting on timing belts or chains
    • 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
    • F01L1/352—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 bevel or epicyclic gear
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

A variable timing camshaft has concentric shafts for mechanically varying the valve timing of internal combustion engines and motors and air compressors and motors. By altering the rotational position of the cam lobes attached to each shaft (1, 2) relative to each other, the valve timing can be varied. This may be achieved by periodically changing the length of a timing chain or belt on one side of sprockets (7, 8). Alternatively, it may be achieved by a series of interconnected cogs which effectively rotate one shaft (1, 2) with respect to the other. The degree of valve lift may also be varied. Inverted cam lobes may act via pivoted rocker arms to open and close the valves. A cam follower spring maintains the tension which is kept to a minimum by means of a spring tensioning device, hydraulic piston lifter or air valve. Alternatively, the relative height of the rocker arm pivot shaft or camshaft can be varied.
GB9614003A 1994-01-05 1995-01-05 Variable timing camshaft with variable valve lift Expired - Fee Related GB2301396B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AUPM3228A AUPM322894A0 (en) 1994-01-05 1994-01-05 Dual operation air compressor/air motor
AUPM4536A AUPM453694A0 (en) 1994-03-18 1994-03-18 Mechanically variable camshaft timing enabling valve opening point, valve closing point and valve duration to be altered in a motor under power
AUPM6505A AUPM650594A0 (en) 1994-06-29 1994-06-29 Concentric variable timing camshaft utilising directly coupled camshaft segments and hydraulic controlled camshaft advance and retard
AUPM6827A AUPM682794A0 (en) 1994-07-15 1994-07-15 Variable timing camshaft utilizing multiple inverted camlobes, independently controled by concentric camshafts, which control valve opening, closing & duration, also incorporating a limited movement ramp type camlobe to vary valve lift
PCT/AU1995/000002 WO1995018917A1 (en) 1994-01-05 1995-01-05 Variable timing camshaft with variable valve list

Publications (3)

Publication Number Publication Date
GB9614003D0 GB9614003D0 (en) 1996-09-04
GB2301396A true GB2301396A (en) 1996-12-04
GB2301396B GB2301396B (en) 1998-05-06

Family

ID=27424362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9614003A Expired - Fee Related GB2301396B (en) 1994-01-05 1995-01-05 Variable timing camshaft with variable valve lift

Country Status (4)

Country Link
AU (1) AU1376495A (en)
DE (1) DE19581459T1 (en)
GB (1) GB2301396B (en)
WO (1) WO1995018917A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620744B4 (en) * 1995-06-07 2006-02-02 Volkswagen Ag Device for influencing the timing of an internal combustion engine
JP2002285871A (en) * 2001-03-27 2002-10-03 Unisia Jecs Corp Variable valve gear for internal combustion engine
US6999864B2 (en) * 2002-07-15 2006-02-14 Hitachi, Ltd. Apparatus and method for estimating residual gas amount of internal combustion engine, and apparatus and method for controlling intake air amount of internal combustion engine using estimated residual gas amount
JP4060136B2 (en) * 2002-07-15 2008-03-12 株式会社日立製作所 Control device for variable valve mechanism
JP4092184B2 (en) * 2002-12-10 2008-05-28 株式会社日立製作所 Variable valve control device for internal combustion engine
DE102005014680A1 (en) * 2005-02-03 2006-08-10 Mahle International Gmbh Camshaft with mutually rotatable cam for motor vehicles in particular
DE102005039751A1 (en) * 2005-08-23 2007-03-01 Mahle International Gmbh camshaft
DE102007007758A1 (en) * 2007-02-16 2008-08-21 Mahle International Gmbh Valve drive of a reciprocating internal combustion engine
DE102007019236B4 (en) 2007-04-24 2022-06-09 Daimler Truck AG engine brake
DE112007003581A5 (en) * 2007-08-22 2010-07-01 Fev Motorentechnik Gmbh Internal combustion engine with cam-controlled variable valve train
DE102012212250A1 (en) * 2012-07-12 2014-01-16 Mahle International Gmbh Internal combustion engine e.g. piston engine, for use in motor car, has inlet and exhaust valve-side cam shafts in drive-connection with each other within valve train in enforced manner and arranged at top of cylinder head of engine
JP2016521327A (en) * 2013-04-09 2016-07-21 アカーテース パワー，インク． Mechanism for changing crankshaft timing in a belt / chain driven double crankshaft opposed piston engine
DE102017113363B4 (en) * 2017-06-19 2022-06-23 Schaeffler Technologies AG & Co. KG Variable valve train of an internal combustion engine
US10697333B2 (en) 2017-12-01 2020-06-30 Schaeffler Technologies AG & Co. KG Hydraulically actuated camshaft phasers for concentrically arranged camshafts
US10895179B2 (en) 2018-01-12 2021-01-19 Schaeffler Technologies AG & Co. KG Trigger wheel arrangement for concentrically arranged camshafts

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897760A (en) * 1973-10-09 1975-08-05 Charles A Hisserich Valve timing overlap control for internal combustion engines
US4332222A (en) * 1978-05-20 1982-06-01 Volkswagenwerk Aktiengesellschaft Camshaft for an internal combustion engine
DE3212663A1 (en) * 1982-04-05 1983-10-13 Harry 6200 Wiesbaden Martin Camshaft with variable timings
US4517934A (en) * 1979-07-26 1985-05-21 Volkswagenwerk Aktiengesellschaft Controllable camshaft for a drive, preferably an internal combustion engine
US4643141A (en) * 1986-01-26 1987-02-17 Bledsoe Phillip G Internal combustion engine valve lift and cam duration control system
DE3615449A1 (en) * 1986-05-07 1987-11-12 Erich Schmid Device for a cam-controlled reciprocating piston engine
US4771742A (en) * 1986-02-19 1988-09-20 Clemson University Method for continuous camlobe phasing
DE3934848A1 (en) * 1989-10-19 1991-04-25 Ingelheim Peter Graf Von Camshaft with single control for several valve timings - has hollow shaft with peripheral slits firmly coupled to drive wheel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513843A (en) * 1974-07-01 1976-01-13 Nippon Telegraph & Telephone BUNPASOCHOANZENBEN
DE2921645A1 (en) * 1979-05-28 1980-12-11 Karl Lehr Variable timing camshaft for IC engine - has each lobe divided and movable on helix to change overall cam form
JPS60113005A (en) * 1983-11-25 1985-06-19 Suzuki Motor Co Ltd Valve timing variable device of four-cycle engine
JPS6125905A (en) * 1984-07-13 1986-02-05 Hitachi Ltd Variable valve timing controller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897760A (en) * 1973-10-09 1975-08-05 Charles A Hisserich Valve timing overlap control for internal combustion engines
US4332222A (en) * 1978-05-20 1982-06-01 Volkswagenwerk Aktiengesellschaft Camshaft for an internal combustion engine
US4517934A (en) * 1979-07-26 1985-05-21 Volkswagenwerk Aktiengesellschaft Controllable camshaft for a drive, preferably an internal combustion engine
DE3212663A1 (en) * 1982-04-05 1983-10-13 Harry 6200 Wiesbaden Martin Camshaft with variable timings
US4643141A (en) * 1986-01-26 1987-02-17 Bledsoe Phillip G Internal combustion engine valve lift and cam duration control system
US4771742A (en) * 1986-02-19 1988-09-20 Clemson University Method for continuous camlobe phasing
DE3615449A1 (en) * 1986-05-07 1987-11-12 Erich Schmid Device for a cam-controlled reciprocating piston engine
DE3934848A1 (en) * 1989-10-19 1991-04-25 Ingelheim Peter Graf Von Camshaft with single control for several valve timings - has hollow shaft with peripheral slits firmly coupled to drive wheel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Pats. abs. of JP, M-424, page 29, JP, A, 60-113005 SUZUKI JIDOSHA KOGYO K.K. 19.06.85 *
Pats. abs. of JP, M-491, page 75,JP, A, 61-25905 HITACHI LT05.02.86 *

Also Published As

Publication number Publication date
DE19581459T1 (en) 1997-02-27
WO1995018917A1 (en) 1995-07-13
AU1376495A (en) 1995-08-01
GB2301396B (en) 1998-05-06
GB9614003D0 (en) 1996-09-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000105