KR900700318A - 차량구동용 동력장치 - Google Patents

차량구동용 동력장치

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Publication number
KR900700318A
KR900700318A KR1019890702263A KR890702263A KR900700318A KR 900700318 A KR900700318 A KR 900700318A KR 1019890702263 A KR1019890702263 A KR 1019890702263A KR 890702263 A KR890702263 A KR 890702263A KR 900700318 A KR900700318 A KR 900700318A
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South Korea
Prior art keywords
clutch
throttle
engine
signal
automatically
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KR1019890702263A
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English (en)
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KR960016557B1 (ko
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포터 자비스 로저
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로버트 마이클 패로우
오토모티브 프로덕츠 퍼블릭 리미티드 캄파니
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Publication of KR900700318A publication Critical patent/KR900700318A/ko
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Publication of KR960016557B1 publication Critical patent/KR960016557B1/ko

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    • 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
    • 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
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • 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
    • 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
    • F16H63/46—Signals to a clutch outside the gearbox
    • 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
    • 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
    • B60W2710/025—Clutch slip, i.e. difference between input and output speeds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1023—Electric motor
    • F16D2500/1024—Electric motor combined with hydraulic actuation
    • 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
    • F16D2500/30—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
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50236—Adaptations of the clutch characteristics, e.g. curve clutch capacity torque - clutch actuator displacement
    • 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
    • F16D2500/702—Look-up tables
    • F16D2500/70252—Clutch torque
    • F16D2500/70258—Throttle
    • 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
    • F16D2500/702—Look-up tables
    • F16D2500/70252—Clutch torque
    • F16D2500/7027—Engine 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
    • 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
    • F16D2500/70438—From the output shaft
    • F16D2500/70442—Output 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
    • 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
    • F16D2500/70452—Engine parameters
    • F16D2500/70454—Engine 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
    • 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
    • F16D2500/70464—Transmission parameters
    • F16D2500/70466—Input shaft
    • F16D2500/70472—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
    • F16H59/02—Selector apparatus
    • F16H59/0217—Selector apparatus with electric switches or sensors not for gear or range selection, e.g. for controlling auxiliary devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

내용 없음

Description

차량구동용 동력장치
제1도는 본 발명에 따른 구성된 동력장치가 구비된 모우터차량을 보인 개략도,
제2도는 제1도에 사용된 동력장치를 보인 구성도,
제3도는 낮은 변속비로부터 높은 변속비로 기어변속되는 과정에서 제2도 동력장치의 요소가 작동되는 것을 보인 일련의 그래프.
내용 없음

Claims (11)

  1. 모우터차량(2)의 적어도 한 바퀴(4)를 구동시키는 동력장치로서, 이 동력장치가 회전력을 출력하는 내연기관 엔진(8)과, 이 엔진에 연료를 공급하기 위한 연료공급수단(76;80A,84,140;150,152)으로 구성되고, 이 연료공급수단은 엔진에 대한 연료공급량에 따라서 개방정도가 조절되도록 개폐되는 조절형 스로틀수단(80,84;80A,84,140;150,152)으로 구성되며, 상기 바퀴에 회전력을 전달하기 위한 회전출력축(12)과 엔진으로부터 출력토오크를 받기 위한 회전입력축(14)을 가지며 상기 축사이의 다수의 변속기어를 갖는 변속기(10)가 구성되어 있고, 각 변속기어는 차량운전자의 수동조작으로 변속기어선택수단(16)의 작동에 응답하여 결합 및 분리되며, 입력축에 엔진의 출력토오크를 전달하기 위하여 상기 엔진과 상기 입력축 사이에 개재된 클러치(20)와, 이 클러치의 토오크전달능력을 에상최대능력(C1)(크러치가 완전히 결합됨)으로부터 제로(0) 능력(클러치가 완전히 분리됨)의 범위로 변화시킬 수 있는 클러치제어수단(46,48)이 구성되어있고, 클러치 제어수단은 현재 결합되어 있는 변속기어를 분리하고자하는 운전자의 희망을 나타내는 제1신호(62)의 발생에 응답하고 다른 변속기어가 결합된 것을 나타내는 제2신호(60)의 발생에 응답하며, 상기 클러치제어수단은 상기 제1신호에 응답하여 클러치가 자동적으로 완전히 분리되게하고 상기 제2신호에 응답하여 클러치가 자동적으로 완전히 결합되게하며, 운전자의 스로틀명령신호에 응답하여 상기 스로틀수단은 개폐하는 스로틀제어수단(86,88,48,92,94)으로 구성되는 차량구동용 동력장치에 있어서, 스로틀제어수단(48,86,88,92,94,96)이 상기 스로틀수단(80,84;80A,84,140;150,152)이 개방되는 정도를 변화시키기 위하여 상기 제1신호(62)의 발생시에 자동적으로 작동가능하고 운전자의 현재 스로틀명령신호(90)에 의하여 명령된 것에 일치하는 개방정도(Td)로 스로틀수단을 복귀시키기 위하여 제2신호(60)의 연속된 발생시에 자동력으로 작동가능하며, 상기 제1신호으리 발생시(t1)에 스로틀 밸브수단이 운전자에 의하여 현재 명령된 개방정도(Td)보다 낮은 값(%T…Tc…0)으로 스로틀수단이 개방되는 정도를 적어도 감소시키도록 자동적으로 작동되고, 이미 결합되어 있는 변속기어보다 변속비가 큰 변속기어의 상기 클러치제어수단(48,48)의 결합을 나타내는 상기 제2신호의 발생시(t4)에 클러치(20)가 자동적으로 결합되어 클러치(20)의 토오크전달능력(C)이 상기 예상된 최대값(C1)보다 작은 목표토오크전달능력(Ct)까지 충분히 분리된 클러치로부터 증가되고 상기 목표토오크전달능력(Ct)까지의 증가과정에서 클러치(20)의 토오크전달 능력(C)이 제1비율로 증가되며 상기 목표토오크전달능력(Ct)에 이른 후에는클러치(20)의 토오크전달능력(C)이 자동적으로 상기 예정된 최대값(C1)을 향하여 낮은 제2 비율(124)로 증가되고, 상기 제1 비율(118)로 토오크전달능력의 증가과정에서 결합되는 클러치(20)가 엔진감속(120)이 제2신호의 발생(t4) 직전의 경우(114)보다 크게 엔진(8)의 감속(120)이 이루어지도록함을 특징으로하는 차량구동용 동력장치.
  2. 청구범위 1항에 있어서, 이미 결합된 변속비보다 높은 변속비를 갖는 변속기어의 상기 클러치제어수단(46)(48)의 결합을 나타내는 상기 제2 신호(60)의 발생시(t4)에 클러치(20)가 자동적으로 결합되어 클러치(20)의 토오크전달능력(C)이 목표토오크전달능력(Ct)까지 충분히 분리된 클러치로부터 제1 비율(118)로 증가되고 상기 예상된 최대값(C1)을 향하는 상기 목표토오크전달능력(Ct)으로부터 낮은 제2 비율(124)로 자동적으로 증가되도록 작동됨을 특징으로 하는 동력장치.
  3. 청구범위 1항 또는 2항에 있어서, 클러치가 상기 입력축(14)과 함께 빠르게 회전하는 클러치피동판(32)으로 구성되는 마찰클러치(20)임을 특징으로하는 동력장치.
  4. 전기 청구범위의 어느 한 항에 있어서, 클러치(20)의 목표토오크전달능력(Ct)이 클러치가 상기 목표토오크능력(Ct)에 달하고 스로틀수단(80,84;80A,84,140;150,152)이 운전자의 현재 스로틀명령신호(90)에 의하여 명령된 정도(Td)로 개방될 시간(t6)에 엔진(8)에 의하여 공급되는 토오크출력과 동일함을 특징으로하는 동력장치.
  5. 전기 청구범위의 어느 한 항에 있어서, 상기 제1신호(62)의 발생시에 스로틀제어수단(48,86,88,92,94,96)이 스로틀수단(80,84;80A,84,140;150,152)을 그 폐쇄, 즉 최소위치로 폐쇄토록 자동적으로 작동될 수 있게 구성되어 있음을 특징으로하는 동력장치.
  6. 전기 청구범위의 어느 한 항에 있어서, 상기 엔진(8)의 큰 감속(120)이 이루어진 것에 이어서 스로틀제어수단(48,86,88,92,94,96)이 운전자의 현재 스로틀명령신호(90)에 의하여 명령된 것에 일치하는 개방정도(Td)로 스로틀수단(80,84;80A,84,140;150,152)을 복귀시키도록 자동적으로 작동될 수 있게 구성되어 있음을 특징으로하는 동력장치.
  7. 청구범위 6항에 있어서, 스로틀수단(80,84;80A,84,140;150,152)에 의하여 상기 개방정도(Td)에 이르는 것이 상기 제2신호(60)의 초기 발생(t4)후에 사전에 결정된 시간(tx)의 경과후에 이루어짐을 특징으로 하는 동력장치.
  8. 청구범위 6항 또는 7항에 있어서, 스로틀수단(80,84;80A,84,140;150,152)에 의하여 상기 개방정도(Td)에 이루는 것이 엔진(8)과 입력축(14)의 속도(A,B)가 동일하게 되는 동일한 시간(t8)에 이루어짐을 특징으로 하는 동력장치.
  9. 청구범위 6-8항의 어느 한 항에 있어서, 클러치(20)가 상기 목표토오크전달능력(Ct)에 이른후, 스로틀제어수단(48,86,88,92,94,96)가 운전자의 현재 스로틀명령신호(90)에 의하여 명령된 것에 일치하는 개방정도(Td)로 스로틀수단(80,84;80A,84,140;150,152)을 복귀시키도록 자동적으로 작동함을 특징으로 하는 동력장치.
  10. 청구범위 6-9항의 어느 한 항에 있어서, 클러치전달능력(C)이 상기 사전에 결정된 최대값(C1)에 이르기전에 스로틀수단(80,84;80A,84,140;150,152)이 운전자의 현재 스로틀명령신호(90)에 의하여 명령된 것에 일치하는 개방정도(Td)로 복원됨을 특징으로 하는 동력장치.
  11. 전기 청구범위에 청구된 동력장치로 구성됨을 특징으로하는 모우터차량(2).
    ※참고사항: 최초출항 내용에 의하여 공개하는 것임.
KR1019890702263A 1988-04-30 1989-01-31 차량구동용 동력장치 KR960016557B1 (ko)

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GB8810365.0 1988-04-30
GB888810365A GB8810365D0 (en) 1988-04-30 1988-04-30 Power line to drive vehicle
PCT/GB1989/000089 WO1989010282A1 (en) 1988-04-30 1989-01-31 Power line to drive a vehicle

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KR960016557B1 KR960016557B1 (ko) 1996-12-14

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JPH03503870A (ja) 1991-08-29
GB2245036B (en) 1992-05-20
KR960016557B1 (ko) 1996-12-14
GB9017505D0 (en) 1990-09-26
GB9114305D0 (en) 1991-08-21
GB8810365D0 (en) 1988-06-08
DE68918707D1 (de) 1994-11-10
EP0448551B1 (en) 1994-10-05
GB2245036A (en) 1991-12-18
GB2233053A (en) 1991-01-02
US5072815A (en) 1991-12-17
EP0448551A1 (en) 1991-10-02
GB2233053B (en) 1992-05-13
WO1989010282A1 (en) 1989-11-02
DE68918707T2 (de) 1995-04-27

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