BR9808595A - Método e aparelho para operar embreagem em transmissão mecânica automática - Google Patents
Método e aparelho para operar embreagem em transmissão mecânica automáticaInfo
- Publication number
- BR9808595A BR9808595A BR9808595-6A BR9808595A BR9808595A BR 9808595 A BR9808595 A BR 9808595A BR 9808595 A BR9808595 A BR 9808595A BR 9808595 A BR9808595 A BR 9808595A
- Authority
- BR
- Brazil
- Prior art keywords
- rate
- clutch
- release bearing
- mechanical transmission
- automatic mechanical
- Prior art date
Links
- 230000009347 mechanical transmission Effects 0.000 title abstract 2
- 230000007704 transition Effects 0.000 abstract 4
- 230000000881 depressing effect Effects 0.000 abstract 1
Classifications
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18027—Drive off, accelerating from standstill
-
- 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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0019—Control system elements or transfer functions
- B60W2050/0022—Gains, weighting coefficients or weighting functions
-
- 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
- B60W2510/02—Clutches
- B60W2510/0208—Clutch engagement state, e.g. engaged or disengaged
- B60W2510/0225—Clutch actuator 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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
- B60W2710/023—Clutch engagement 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
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3026—Stroke
-
- 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
- F16D2500/3041—Signal inputs from the clutch from the input shaft
- F16D2500/30415—Speed of the input 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
- F16D2500/308—Signal inputs from the transmission
- F16D2500/3082—Signal inputs from the transmission from the output shaft
- F16D2500/30825—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
- F16D2500/314—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
- F16D2500/70—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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0248—Control units where shifting is directly initiated by the driver, e.g. semi-automatic transmissions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Automation & Control Theory (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
<B>MéTODO E APARELHO PARA OPERAR EMBREAGEM EM TRANSMISSãO MECâNICA AUTOMáTICA<D> Um aparelho e método para controlar a taxa de engrenamento de uma embreagem (12) em resposta a uma indicação fornecida pelo motorista, tal como a depressão de um pedal de acelerador (24) do veículo. O aparelho inclui um controlador eletrónico (20) que inicialmente determina uma taxa de início como o ciclo de trabalho mínimo que é requerido para modular uma válvula de engrenamento (41) a fim de provocar movimento de um mancal de liberação (33) da embreagem na direção de engrenamento. Seguindo o recebimento de um sinal do operador do veículo para iniciar o engrenamento da embreagem, o controlador eletrónico calcula uma taxa de transição inicial de movimento do mancal de liberação de uma posição desacoplada para um ponto de transição. A taxa de transição é determinada em função da taxa de início e de um sinal de erro de posição. O sinal de erro de posição pode ser calculado como a diferença entre a posição real do mancal de liberação e o ponto de transição.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/840,815 US6206803B1 (en) | 1997-04-16 | 1997-04-16 | Method and apparatus for operating a clutch in an automated mechanical transmission |
| PCT/US1998/007713 WO1998046900A1 (en) | 1997-04-16 | 1998-04-15 | Method and apparatus for operating a clutch in an automated mechanical transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9808595A true BR9808595A (pt) | 2001-08-07 |
Family
ID=25283304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9808595-6A BR9808595A (pt) | 1997-04-16 | 1998-04-15 | Método e aparelho para operar embreagem em transmissão mecânica automática |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6206803B1 (pt) |
| EP (1) | EP0977954A4 (pt) |
| BR (1) | BR9808595A (pt) |
| WO (1) | WO1998046900A1 (pt) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000280876A (ja) * | 1999-03-30 | 2000-10-10 | Isuzu Motors Ltd | オートクラッチ車両 |
| DE10116544C1 (de) * | 2001-04-03 | 2002-06-27 | Siemens Ag | Betätigungssystem für die Kupplung eines mit einem automatisierten Schaltgetriebe versehenen Kraftfahrzeugantriebs und Verfahren zum Steuern eines solchen Betätigungssystems |
| US6564915B2 (en) | 2001-08-10 | 2003-05-20 | Caterpillar Inc | Power take-off clutch control system |
| US20050229629A1 (en) * | 2002-12-16 | 2005-10-20 | Behr Gmbh & Co. Kg | Refrigerant circuit and a refrigerating system |
| JP3931812B2 (ja) * | 2003-01-10 | 2007-06-20 | トヨタ自動車株式会社 | 自動クラッチ機構の制御装置 |
| GB2399870A (en) * | 2003-03-25 | 2004-09-29 | Eaton Corp | Hill start or aggressive clutch control |
| US7101310B2 (en) * | 2004-04-19 | 2006-09-05 | Magna Powertrain Usa, Inc. | Model-based control for torque biasing system |
| BR112017024522B1 (pt) * | 2015-05-14 | 2022-11-29 | Eaton Intelligent Power Limited | Método de controle para operar um sistema de transmissão manual automatizado |
| CN109624964B (zh) * | 2018-12-17 | 2020-12-29 | 安徽江淮汽车集团股份有限公司 | 一种湿式双离合器自动变速器的起步控制方法及系统 |
Family Cites Families (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2208865A (en) | 1940-06-05 | 1940-07-23 | Jalma West | Automatic clutch operation for motor vehicles |
| US3004447A (en) | 1956-10-16 | 1961-10-17 | Gen Motors Corp | Transmission control device |
| GB1342623A (en) | 1971-02-23 | 1974-01-03 | Ford Motor Co | Friction clutch control system |
| DE2124024C2 (de) | 1971-05-14 | 1982-06-16 | Daimler-Benz Ag, 7000 Stuttgart | Vorrichtung zur Regelung der Betätigungskraft eines Schaltgliedes bei automatisch geschalteten Stufengetrieben |
| ES418836A1 (es) | 1972-09-13 | 1976-03-16 | Eisenwerke Reintjes Gmgh | Perfeccionamientos en los embragues de laminas accionados hidraulicamente. |
| GB1543386A (en) * | 1975-05-12 | 1979-04-04 | Nissan Motor | Clutch control apparatus |
| JPS51147824A (en) * | 1975-06-13 | 1976-12-18 | Nissan Motor Co Ltd | Automatic clutch control system |
| US4081065A (en) * | 1976-12-23 | 1978-03-28 | Smyth Robert Ralston | Controlled power clutch |
| US4116321A (en) | 1976-12-27 | 1978-09-26 | Borg-Warner Corporation | Valve arrangement for closed-loop control system |
| DE2833961A1 (de) | 1978-08-03 | 1980-02-21 | Volkswagenwerk Ag | Einrichtung zur automatischen betaetigung einer kraftfahrzeugkupplung |
| DE2906587A1 (de) | 1979-02-21 | 1980-08-28 | Volkswagenwerk Ag | Einrichtung zur automatischen betaetigung einer kraftfahrzeugkupplung |
| DE3174453D1 (en) | 1980-07-08 | 1986-05-28 | Automotive Prod Plc | Clutch control system |
| SU1195896A3 (ru) | 1980-11-04 | 1985-11-30 | Automotive Prod Co Ltd | "элektpohhaя cиctema упpabлehия фpиkциohhoй mуфtoй cцeплehия tpahcпopthoгo cpeдctba" |
| US4488625A (en) | 1981-05-01 | 1984-12-18 | Toyo Kogyo Co., Ltd. | Clutch control system for automobiles |
| DE3209645A1 (de) | 1982-03-17 | 1983-09-29 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart | Vorrichtung zum regeln einer kraftfahrzeug-antriebseinheit |
| JPS58170924A (ja) * | 1982-03-31 | 1983-10-07 | Aisin Seiki Co Ltd | 自動クラツチ制御装置 |
| US4591038A (en) | 1983-06-16 | 1986-05-27 | Fujitsu Limited | Automatic clutch control system |
| JPH0729569B2 (ja) | 1983-06-29 | 1995-04-05 | いすゞ自動車株式会社 | 自動クラッチ制御装置 |
| CA1250642A (en) | 1983-06-30 | 1989-02-28 | Toshihiro Hattori | Method of controlling the starting of a vehicle having automatic clutch |
| JPS60139541A (ja) | 1983-12-27 | 1985-07-24 | Fuji Heavy Ind Ltd | 車両用電磁式クラツチのクラツチトルク制御装置 |
| US4535879A (en) | 1984-02-29 | 1985-08-20 | Borg-Warner Corporation | Control system for controlling the engagement of a pressure-operated actuator |
| JPH0780425B2 (ja) * | 1986-03-31 | 1995-08-30 | 富士重工業株式会社 | 車両用自動クラツチの制御装置 |
| JPH0689796B2 (ja) * | 1986-04-30 | 1994-11-14 | 富士重工業株式会社 | 車両用自動クラツチの制御装置 |
| GB8723547D0 (en) | 1987-10-07 | 1987-11-11 | Automotive Prod Plc | Clutch control |
| JP2636283B2 (ja) | 1987-12-11 | 1997-07-30 | いすゞ自動車株式会社 | 自動クラッチ制御装置 |
| US4874070A (en) * | 1988-02-10 | 1989-10-17 | Eaton Corporation | Control for AMT system start from stop operation |
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| US5307269A (en) | 1989-04-12 | 1994-04-26 | Zexel Corporation | Method for correcting clutch control data in accordance with disk temperature |
| JP2646133B2 (ja) | 1989-04-12 | 1997-08-25 | 株式会社ゼクセル | クラッチ制御用データの補正方法 |
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| US4998604A (en) | 1990-02-12 | 1991-03-12 | General Motors Corporation | Variable capacity control apparatus for an automotive torque converter clutch |
| US5056639A (en) | 1990-09-10 | 1991-10-15 | Zahnradfabrik Friedrichshafen Ag | Device and method for the control of an automatic vehicle clutch |
| US5121820A (en) * | 1990-12-24 | 1992-06-16 | Ford Motor Company | Feedforward control for automatic transmission torque converter bypass clutch slip |
| US5062321A (en) | 1991-03-11 | 1991-11-05 | General Motors Corporation | Control apparatus for regulating engagement of a fluid operated torque transmitting device |
| US5119697A (en) | 1991-04-29 | 1992-06-09 | General Motors Corporation | Control apparatus for regulating engagement of a fluid operated torque transmitting device |
| GB9114005D0 (en) | 1991-06-28 | 1991-08-14 | Automotive Prod Plc | A clutch control system |
| JPH05187540A (ja) | 1992-01-09 | 1993-07-27 | Jatco Corp | ロックアップクラッチ制御装置 |
| US5314050A (en) | 1992-12-09 | 1994-05-24 | Eaton Corporation | Clutch mode control logic |
| US5316116A (en) | 1992-12-09 | 1994-05-31 | Eaton Corporation | Engine control method for use with automatic clutch control |
| US5393274A (en) * | 1993-07-19 | 1995-02-28 | Eaton Corporation | Touch point identification algorithm for automatic clutch controller |
| US5450767A (en) | 1993-11-03 | 1995-09-19 | Dana Corporation | Vehicle transmission having manually shifted lower gears and automatically shifted higher gears |
| US5634867A (en) * | 1994-09-19 | 1997-06-03 | Eaton Corporation | Main clutch reengagement control for a double clutch downshift |
| US5794752A (en) | 1996-12-30 | 1998-08-18 | Dana Corporation | Clutch actuator |
| WO1998046907A2 (en) * | 1997-04-16 | 1998-10-22 | Transmission Technologies Corporation | Method and apparatus for operating a clutch in an automated mechanical transmission |
-
1997
- 1997-04-16 US US08/840,815 patent/US6206803B1/en not_active Expired - Fee Related
-
1998
- 1998-04-15 WO PCT/US1998/007713 patent/WO1998046900A1/en not_active Ceased
- 1998-04-15 EP EP98918328A patent/EP0977954A4/en not_active Withdrawn
- 1998-04-15 BR BR9808595-6A patent/BR9808595A/pt not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0977954A4 (en) | 2001-08-16 |
| US6206803B1 (en) | 2001-03-27 |
| WO1998046900A1 (en) | 1998-10-22 |
| EP0977954A1 (en) | 2000-02-09 |
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