GB2292591A - Clutch control system - Google Patents

Clutch control system

Info

Publication number
GB2292591A
GB2292591A GB9519907A GB9519907A GB2292591A GB 2292591 A GB2292591 A GB 2292591A GB 9519907 A GB9519907 A GB 9519907A GB 9519907 A GB9519907 A GB 9519907A GB 2292591 A GB2292591 A GB 2292591A
Authority
GB
United Kingdom
Prior art keywords
clutch
signal
reference signal
current
control system
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
GB9519907A
Other versions
GB2292591B (en
GB9519907D0 (en
Inventor
Paul Vincent Shepherd
Charles John Jones
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Publication of GB9519907D0 publication Critical patent/GB9519907D0/en
Publication of GB2292591A publication Critical patent/GB2292591A/en
Application granted granted Critical
Publication of GB2292591B publication Critical patent/GB2292591B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/068—Control by electric or electronic means, e.g. of fluid pressure using signals from a manually actuated gearshift linkage
    • 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
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/14—Fluid pressure control
    • 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
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • 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
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/08—Regulating clutch take-up on starting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0604—Throttle position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine speed
    • B60W2510/0652—Speed change rate
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/108—Gear
    • F16D2500/1081—Actuation type
    • F16D2500/1082—Manual transmission
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30426—Speed of the output shaft
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/306—Signal inputs from the engine
    • F16D2500/3067—Speed of the engine
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/31406—Signal inputs from the user input from pedals
    • F16D2500/3144—Accelerator pedal position
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/3146—Signal inputs from the user input from levers
    • F16D2500/31466—Gear lever
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/316—Other signal inputs not covered by the groups above
    • F16D2500/3166—Detection of an elapsed period of time
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50224—Drive-off
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/7041—Position
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70422—Clutch parameters
    • F16D2500/70424—Outputting a clutch engaged-disengaged signal
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/46—Inputs being a function of speed dependent on a comparison between speeds

Abstract

A clutch control system for the automatic control of a motor vehicle clutch (14) which connects an engine (10) with a gearbox (12) under the control of a driver-operated gear ratio selector lever (24). The control system including an electronic control unit (36) which controls initial clutch take-up on starting of the vehicle, clutch re-engagement following each ratio change, disengagement on movement of the gear selector lever to change the operative ratio of the gearbox, and clutch disengagement on the coming to rest of the vehicle. The level of clutch engagement is controlled in response to an engine speed error signal (E) derived from a comparison of current engine speed (Ve) and a reference speed signal (Vr) generated by the control unit, the error signal being compared with a current clutch position signal (Vc) to produce a clutch actuation signal (Vce). The reference signal for initial clutch take-up is derived from one of the following references on a highest-wins basis: a reference signal proportional to the current throttle position (Va'), a reference signal proportional to the current engine idle speed (Vir), or a floating reference signal (Vfr) equal to a recorded engine speed plus an offset. <IMAGE>
GB9519907A 1994-02-12 1995-02-10 Clutch control system Expired - Fee Related GB2292591B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9402730A GB9402730D0 (en) 1994-02-12 1994-02-12 Clutch control system
PCT/GB1995/000266 WO1995022013A2 (en) 1994-02-12 1995-02-10 Clutch control system

Publications (3)

Publication Number Publication Date
GB9519907D0 GB9519907D0 (en) 1995-11-29
GB2292591A true GB2292591A (en) 1996-02-28
GB2292591B GB2292591B (en) 1998-06-10

Family

ID=10750295

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9402730A Pending GB9402730D0 (en) 1994-02-12 1994-02-12 Clutch control system
GB9519907A Expired - Fee Related GB2292591B (en) 1994-02-12 1995-02-10 Clutch control system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9402730A Pending GB9402730D0 (en) 1994-02-12 1994-02-12 Clutch control system

Country Status (10)

Country Link
US (1) US5679098A (en)
EP (1) EP0696341B1 (en)
JP (1) JPH08509283A (en)
KR (1) KR100367482B1 (en)
CN (1) CN1071869C (en)
BR (1) BR9505776A (en)
DE (1) DE69524687T2 (en)
ES (1) ES2170138T3 (en)
GB (2) GB9402730D0 (en)
WO (1) WO1995022013A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028162A1 (en) 1996-12-20 1998-07-02 Kongsberg Techmatic Uk Limited Clutch control system
GB2356438A (en) * 1999-11-20 2001-05-23 Luk Lamellen & Kupplungsbau Clutch control system

Families Citing this family (33)

* Cited by examiner, † Cited by third party
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US6001044A (en) * 1995-12-18 1999-12-14 Luk Getriebe-Systeme Gmbh Motor vehicle
NO314174B1 (en) * 1995-12-18 2003-02-10 Luk Getriebe Systeme Gmbh Motor vehicles
JP3033487B2 (en) * 1996-03-01 2000-04-17 トヨタ自動車株式会社 Torque estimation method, torque calculation data correction method, and torque estimation device
US6309325B1 (en) * 1997-04-17 2001-10-30 Transmission Tsp, S.A. De C.V. Method and apparatus for operating a clutch in an automated mechanical transmission
US6052637A (en) * 1997-06-09 2000-04-18 Eaton Corporation Clutch adjustment determination
DE19726214A1 (en) * 1997-06-20 1998-12-24 Bosch Gmbh Robert System for joint control of a servo clutch and a vehicle engine
US6186925B1 (en) 1998-11-13 2001-02-13 Cummins Engine Company, Inc. System for protecting drive train components from excessive engine inertial forces
US6071211A (en) * 1998-11-18 2000-06-06 Eaton Corporation Idle drive torque control for automated vehicle master clutch
FR2791012B1 (en) 1999-03-15 2006-12-01 Luk Lamellen & Kupplungsbau COUPLING CONTROL SYSTEM
GB9919179D0 (en) 1999-08-16 1999-10-20 Luk Getriebe Systeme Gmbh Transmission systems
GB2353835B (en) 1999-09-04 2003-09-24 Luk Lamellen & Kupplungsbau Automated transmission systems
DE10051589A1 (en) * 1999-11-04 2001-05-10 Luk Lamellen & Kupplungsbau Operating device for clutch device, with switching position reporting device
FR2801355B1 (en) 1999-11-20 2006-09-15 Luk Lamellen & Kupplungsbau CLUTCH CONTROL SYSTEM
US6676562B1 (en) * 2002-07-19 2004-01-13 New Holland North America, Inc. Automatic clutch engagement controlled by engine speed
US6832978B2 (en) * 2003-02-21 2004-12-21 Borgwarner, Inc. Method of controlling a dual clutch transmission
EP1450076A3 (en) * 2003-02-21 2010-06-09 Borgwarner, Inc. Method of controlling a dual clutch transmission
US6819997B2 (en) * 2003-02-21 2004-11-16 Borgwarner, Inc. Method of controlling a dual clutch transmission
CN101074707B (en) * 2006-05-16 2010-07-14 韩群山 Intelligent controlling system of engine clutch for motorcycle and its controlling method
CN101074708B (en) * 2006-05-16 2011-10-26 韩群山 System and method for automatically controlling engine clutch of motorcycle
JP4804225B2 (en) * 2006-05-24 2011-11-02 本田技研工業株式会社 Lawn mower power transmission control mechanism
JP4894640B2 (en) * 2007-06-11 2012-03-14 トヨタ自動車株式会社 Control device for clutch mechanism
CN101946105B (en) * 2008-03-04 2013-07-17 博格华纳公司 Dual clutch transmission having area controlled clutch cooling circuit
US8968136B2 (en) * 2008-04-18 2015-03-03 Borgwarner Inc. Dual clutch transmission having simplified controls
CN102224032B (en) 2008-12-09 2014-03-12 博格华纳公司 Automatic transmission for hybrid vehicle
JP5625054B2 (en) 2009-06-29 2014-11-12 ボーグワーナー インコーポレーテッド Hydraulic valve for use in the control module of automatic transmission
CN101602263B (en) * 2009-07-08 2012-07-18 南京埃斯顿自动化股份有限公司 Clutch control method based on dual CPU and control system
WO2011082095A2 (en) 2009-12-31 2011-07-07 Borgwarner Inc. Automatic transmission having high pressure actuation and low pressure lube hydraulic circuit
JP5457495B2 (en) * 2012-05-02 2014-04-02 富士重工業株式会社 Vehicle control device
CN103863313B (en) * 2012-12-18 2016-03-09 上海汽车集团股份有限公司 power system control method
US9026331B2 (en) * 2013-03-01 2015-05-05 Wpt Power Corporation Monotonic coupling assembly engagement
CN104908744B (en) * 2014-03-11 2017-02-08 广州汽车集团股份有限公司 Starting control method and system for hybrid electric vehicles,and hybrid control unit
KR101726182B1 (en) * 2015-11-02 2017-04-12 현대오트론 주식회사 Method and Apparatus for Controlling Damper Clutch to Avoid Engine Stall
CN117881596A (en) * 2021-09-30 2024-04-12 本田技研工业株式会社 Saddle-ride type vehicle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2080910A (en) * 1980-07-25 1982-02-10 Sachs Systemtechnik Gmbh Motor-vehicle friction clutch operation mechanism
DE3728851A1 (en) * 1986-08-29 1988-03-10 Fujitsu Ltd CLUTCH TARGET POSITION CONTROL SYSTEM
US4800497A (en) * 1985-03-28 1989-01-24 Aisin Seiki Kabushiki Kaisha Clutch pressure control apparatus
US4817776A (en) * 1985-03-29 1989-04-04 Toshiaki Tateno Starting control apparatus for automatic transmission system
WO1992008065A1 (en) * 1990-11-02 1992-05-14 Automotive Products Plc A clutch control system
WO1992013208A1 (en) * 1991-01-18 1992-08-06 Automotive Products Plc Clutch control system
EP0536932A2 (en) * 1991-10-07 1993-04-14 Eaton Corporation Closed loop launch and creep control for automatic clutch
WO1993010994A1 (en) * 1991-11-27 1993-06-10 Automotive Products Plc A clutch control system

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AU1725283A (en) * 1982-08-11 1984-02-16 Automotive Products Plc Clutch control system
JPS61249833A (en) * 1985-04-30 1986-11-07 Fuji Heavy Ind Ltd Hydraulic control unit for four-wheel driving device
JP2515340B2 (en) * 1987-06-26 1996-07-10 日産自動車株式会社 Automatic transmission control device
JP2843609B2 (en) * 1989-09-09 1999-01-06 ジャトコ株式会社 Lock-up clutch operation control device
JPH05187540A (en) * 1992-01-09 1993-07-27 Jatco Corp Lock-up clutch control device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2080910A (en) * 1980-07-25 1982-02-10 Sachs Systemtechnik Gmbh Motor-vehicle friction clutch operation mechanism
US4800497A (en) * 1985-03-28 1989-01-24 Aisin Seiki Kabushiki Kaisha Clutch pressure control apparatus
US4817776A (en) * 1985-03-29 1989-04-04 Toshiaki Tateno Starting control apparatus for automatic transmission system
DE3728851A1 (en) * 1986-08-29 1988-03-10 Fujitsu Ltd CLUTCH TARGET POSITION CONTROL SYSTEM
WO1992008065A1 (en) * 1990-11-02 1992-05-14 Automotive Products Plc A clutch control system
WO1992013208A1 (en) * 1991-01-18 1992-08-06 Automotive Products Plc Clutch control system
EP0536932A2 (en) * 1991-10-07 1993-04-14 Eaton Corporation Closed loop launch and creep control for automatic clutch
WO1993010994A1 (en) * 1991-11-27 1993-06-10 Automotive Products Plc A clutch control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028162A1 (en) 1996-12-20 1998-07-02 Kongsberg Techmatic Uk Limited Clutch control system
US6086514A (en) * 1996-12-20 2000-07-11 Luk Leamington Limited Clutch control method for determining clutch kiss-point during running conditions
GB2356438A (en) * 1999-11-20 2001-05-23 Luk Lamellen & Kupplungsbau Clutch control system
GB2356438B (en) * 1999-11-20 2004-04-07 Luk Lamellen & Kupplungsbau Clutch control system

Also Published As

Publication number Publication date
DE69524687D1 (en) 2002-01-31
CN1071869C (en) 2001-09-26
CN1123051A (en) 1996-05-22
DE69524687T2 (en) 2002-08-08
GB9402730D0 (en) 1994-04-06
US5679098A (en) 1997-10-21
JPH08509283A (en) 1996-10-01
KR100367482B1 (en) 2003-10-04
EP0696341A1 (en) 1996-02-14
BR9505776A (en) 1997-08-12
GB2292591B (en) 1998-06-10
WO1995022013A3 (en) 1995-09-28
KR960702070A (en) 1996-03-28
ES2170138T3 (en) 2002-08-01
EP0696341B1 (en) 2001-12-19
WO1995022013A2 (en) 1995-08-17
GB9519907D0 (en) 1995-11-29

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080210