DE3765156D1 - Getriebe-gangwechsel-steuersystem. - Google Patents

Getriebe-gangwechsel-steuersystem.

Info

Publication number
DE3765156D1
DE3765156D1 DE8787104720T DE3765156T DE3765156D1 DE 3765156 D1 DE3765156 D1 DE 3765156D1 DE 8787104720 T DE8787104720 T DE 8787104720T DE 3765156 T DE3765156 T DE 3765156T DE 3765156 D1 DE3765156 D1 DE 3765156D1
Authority
DE
Germany
Prior art keywords
control system
transmission gear
change control
gear change
transmission
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 - Lifetime
Application number
DE8787104720T
Other languages
English (en)
Inventor
Eugene Ralph Braun
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.)
Eaton Corp
Original Assignee
Eaton Corp
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 Eaton Corp filed Critical Eaton Corp
Application granted granted Critical
Publication of DE3765156D1 publication Critical patent/DE3765156D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/11—Stepped 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
    • 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
    • B60W10/11—Stepped gearings
    • B60W10/111—Stepped gearings with separate change-speed gear trains arranged in series
    • 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/18—Propelling the 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
    • 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
    • F16H61/70—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 specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements
    • F16H61/702—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 specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements using electric or electrohydraulic control means
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/44—Signals to the control unit of auxiliary gearing
    • 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
    • B60W2300/00—Indexing codes relating to the type of vehicle
    • B60W2300/12—Trucks; Load vehicles
    • B60W2300/125—Heavy duty trucks
    • 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
    • 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
    • B60W2510/10—Change speed gearings
    • B60W2510/104—Output speed
    • 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
    • B60W2540/14—Clutch pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses
    • B60Y2200/142—Heavy duty trucks
    • 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
    • F16H2059/006—Overriding automatic 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H2059/0221—Selector apparatus for selecting modes, i.e. input device
    • 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
    • F16H59/02—Selector apparatus
    • 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
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H59/42—Input shaft speed
    • 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
    • F16H59/68—Inputs being a function of gearing status
    • F16H59/70—Inputs being a function of gearing status dependent on the ratio established
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S477/00—Interrelated power delivery controls, including engine control
    • Y10S477/908—In series transmission
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19167—In series plural interchangeably locked nonplanetary units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19251—Control mechanism
    • Y10T74/19256—Automatic
    • Y10T74/1926—Speed responsive
DE8787104720T 1986-04-11 1987-03-31 Getriebe-gangwechsel-steuersystem. Expired - Lifetime DE3765156D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/850,641 US4722248A (en) 1986-04-11 1986-04-11 Transmission shift control system

Publications (1)

Publication Number Publication Date
DE3765156D1 true DE3765156D1 (de) 1990-10-31

Family

ID=25308733

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787104720T Expired - Lifetime DE3765156D1 (de) 1986-04-11 1987-03-31 Getriebe-gangwechsel-steuersystem.

Country Status (11)

Country Link
US (1) US4722248A (de)
EP (1) EP0240901B1 (de)
JP (1) JPS62246654A (de)
KR (1) KR910000473B1 (de)
CN (1) CN1007334B (de)
AU (1) AU587752B2 (de)
BR (1) BR8702091A (de)
CA (1) CA1275469C (de)
DE (1) DE3765156D1 (de)
ES (1) ES2018187B3 (de)
MX (1) MX165574B (de)

Families Citing this family (63)

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JP2764397B2 (ja) * 1987-06-12 1998-06-11 株式会社ゼクセル 自動変速装置
US4850236A (en) * 1987-11-20 1989-07-25 Eaton Corporation Vehicle drive line shift control system and method
US5000060A (en) * 1989-02-16 1991-03-19 Reynolds Joseph D Compound transmission and shift control therefor
US5038627A (en) * 1990-04-25 1991-08-13 Dana Corporation Vehicle transmission with manually shifted lower gears and automatically shifted upper gears
FI84242C (fi) * 1990-05-14 1991-11-11 Valmet Oy Foerfarande och arrangemang foer automatiserat val av hastighetsomraode foer en elstyrd framvaexel av en traktor eller motsvarande.
CA2020582C (en) * 1990-07-23 1994-04-05 Sheng-Tsai Tseng Transmission
US5172603A (en) * 1991-05-03 1992-12-22 Macinnis Richard F Electrically actuated shifting method and apparatus
DE69213563T2 (de) * 1991-06-03 1997-02-20 New Holland Uk Ltd Getriebe-Geschwindigkeits-Übereinstimmungs-Steuerung
GB9123881D0 (en) * 1991-11-09 1992-01-02 Massey Ferguson Services Nv Controlling powershift transmissions
US5263379A (en) * 1991-12-14 1993-11-23 Eaton Corporation Automatic range shift arrangement
US5329826A (en) * 1992-01-22 1994-07-19 Eaton Corporation Enhanced automated splitter shifting with dual solenoid valves and auto fuel control
US5435212A (en) * 1992-10-30 1995-07-25 Eaton Corporation Semi-automatic shift implementation
US5409432A (en) * 1993-08-10 1995-04-25 Eaton Corporation Control system/method for engine brake assisted shifting
US5401223A (en) * 1993-08-18 1995-03-28 Cummins Electronics Company, Inc. Method and device for controlling critical switch failure and neutral conditions at high and low vehicle speeds
US5450767A (en) * 1993-11-03 1995-09-19 Dana Corporation Vehicle transmission having manually shifted lower gears and automatically shifted higher gears
US5522777A (en) * 1994-05-05 1996-06-04 Dana Corporation Electronic transfer case shifting apparatus
GB9411494D0 (en) 1994-06-08 1994-07-27 Eaton Corp System and method for decreasing ratio changing time in electronically enhanced powertrain systems
US5498195A (en) * 1994-11-10 1996-03-12 Cummins Electronics Company, Inc. Apparatus and method for verifying gear engagement in controlling the automatic shifting of a manual-automatic transmission
US5638271A (en) * 1995-01-04 1997-06-10 Cummins Engine Company, Inc. Apparatus and method for assisting gear engagement in controlling the automatic shifting of a manual-automatic transmission
US5893292A (en) 1995-05-12 1999-04-13 Eaton Corporation Automatic and manual splitter shifting control assembly
US5591102A (en) * 1995-06-07 1997-01-07 Cummins Engine Company, Inc. Apparatus and method for controlling a manual-automatic transmission after a power reset
US5609548A (en) * 1995-06-07 1997-03-11 Cummins Engine Company, Inc. Apparatus and method for commanding a gear after an aborted shift attempt in controlling a manual-automatic transmission
US5676017A (en) * 1995-07-27 1997-10-14 Rockwell Heavy Vehicle Systems, Inc. Automatic range shift for multi-speed transmission
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KR970046648A (ko) * 1995-12-19 1997-07-26 전성원 경사로 밀림 방지기능을 구비한 반자동 변속 제어장치 및 그 방법
US5679096A (en) * 1996-04-08 1997-10-21 Eaton Corporation Torque control for powertrain and change-gear transmission utilized in same
US5682790A (en) 1996-04-30 1997-11-04 Eaton Corporation Synchronizing and gear engagement sensing logic for automated mechanical transmission system
US5904068A (en) 1996-04-30 1999-05-18 Eaton Corporation Semi-automatic shift implementation with synchronized transmission emulation
US5755639A (en) * 1996-04-30 1998-05-26 Eaton Corporation Semi-automatic shift implementation with automatic splitter shifting
US5735771A (en) * 1996-04-30 1998-04-07 Eaton Corporation Semi-automatic shift implementation
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US5732594A (en) * 1996-10-31 1998-03-31 Ford Global Technologies, Inc. Manual transmission with throttle actuated downshift
US5846159A (en) * 1997-02-05 1998-12-08 Eaton Corporation Disengagement confirmation
US5964121A (en) * 1997-02-05 1999-10-12 Eaton Corporation Automated transmission system power-down
US5875409A (en) * 1997-02-05 1999-02-23 Eaton Corporation Transition to degraded mode of operation
US5795264A (en) * 1997-02-05 1998-08-18 Eaton Corporation Sensing manual shift into automated upper ratios
US5938711A (en) * 1997-02-05 1999-08-17 Eaton Corporation Anti-hunt logic
US5974354A (en) * 1997-02-05 1999-10-26 Eaton Corporation Engagement of gear ratio confirmation
US5766111A (en) * 1997-02-05 1998-06-16 Eaton Corporation Automode-to-neutral logic
US5904635A (en) 1997-08-07 1999-05-18 Eaton Corporation Partially automated lever-shifted mechanical transmission system
US6067871A (en) 1997-09-12 2000-05-30 Eaton Corporation Variable resistance shift rail detent assembly and shift control method employing same
DE19747262A1 (de) * 1997-10-25 1999-05-06 Deere & Co Getriebesteuerung und Steuerverfahren für ein Lastschaltgetriebe
US5894758A (en) * 1997-12-15 1999-04-20 Eaton Corporation Assisted lever-shifted transmission
US5910069A (en) 1997-12-22 1999-06-08 Eaton Corporation Transmission system control system/method including adaptive control for engine deceleration device
DE19816595A1 (de) 1998-04-15 1999-10-21 Man Nutzfahrzeuge Ag Vom Fahrer ausgelöste, automatische Splitschaltung
US6109126A (en) * 1998-05-27 2000-08-29 Transmission Technologies Corporation Shift control system for an auxiliary section of a compound vehicular transmission
US6085606A (en) * 1998-11-03 2000-07-11 Eaton Corporation Mechanical transmission with reduced ratio steps in upper transmission ratios
US5992256A (en) * 1998-11-27 1999-11-30 Eaton Corporation Control to suspend automatic upper ratio shifting
GB9828452D0 (en) 1998-12-24 1999-02-17 Eaton Corp Automated transmission downshift control
EP1013497B1 (de) 1998-12-24 2006-05-10 Eaton Corporation Rückschaltssteurung in einem Automatgetriebe
US6325743B1 (en) 1999-01-14 2001-12-04 Eaton Corporation Automated transmission upshift control
US6126569A (en) 1999-07-19 2000-10-03 Eaton Corporation Starting and driveline shock protection control method and system
US6480774B1 (en) 1999-07-23 2002-11-12 Eaton Corporation Convertible transmission system
US6409629B1 (en) 2000-05-17 2002-06-25 Eaton Corporation Automated transmission upshift control with upshift brake thermal protection
US6461273B1 (en) 2001-06-01 2002-10-08 Eaton Corporation Automated transmission upshift brake control
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US6997074B2 (en) 2003-10-30 2006-02-14 Eaton Corporation Prediction of destination gear for progressive shift feature
US20090048053A1 (en) * 2007-08-16 2009-02-19 Ruppert Rex Leroy Auxiliary transmission for a continously variable transmission with active speed control
EP2072320A1 (de) 2007-12-18 2009-06-24 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Verfahren für den Betrieb eines elektromechanischen Wandlers, Steuerung und Computerprogramm
CN103032561B (zh) * 2012-10-30 2016-05-25 龙工(上海)机械制造有限公司 一种装载机变速箱电控换档控制器
WO2015184132A1 (en) * 2014-05-28 2015-12-03 Cummins Inc. Systems and methods for idle coasting management
CN104536316B (zh) * 2014-12-12 2017-09-26 广西科技大学 用于汽车部件疲劳试验的多通道伺服控制系统
CN106246892B (zh) * 2015-06-08 2019-10-01 上海通用汽车有限公司 车辆自动换挡条件调整装置和方法

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Also Published As

Publication number Publication date
AU7105087A (en) 1987-10-15
ES2018187B3 (es) 1991-04-01
KR910000473B1 (ko) 1991-01-25
MX165574B (es) 1992-10-29
EP0240901A2 (de) 1987-10-14
AU587752B2 (en) 1989-08-24
EP0240901B1 (de) 1990-09-26
BR8702091A (pt) 1988-02-09
KR870009886A (ko) 1987-11-30
CN1007334B (zh) 1990-03-28
CN87102677A (zh) 1987-12-16
CA1275469C (en) 1990-10-23
US4722248A (en) 1988-02-02
JPS62246654A (ja) 1987-10-27
EP0240901A3 (en) 1989-04-05

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