WO1994005933A1 - Levier de vitesses sensible aux forces - Google Patents

Levier de vitesses sensible aux forces Download PDF

Info

Publication number
WO1994005933A1
WO1994005933A1 PCT/GB1993/001138 GB9301138W WO9405933A1 WO 1994005933 A1 WO1994005933 A1 WO 1994005933A1 GB 9301138 W GB9301138 W GB 9301138W WO 9405933 A1 WO9405933 A1 WO 9405933A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
gear
knob
force sensitive
clutch
Prior art date
Application number
PCT/GB1993/001138
Other languages
English (en)
Inventor
Charles John Jones
John Vivian Comfort
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 WO1994005933A1 publication Critical patent/WO1994005933A1/fr

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
    • 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
    • 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
    • B60W30/1819—Propulsion control with control means using analogue circuits, relays or mechanical links
    • 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
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor

Definitions

  • This invention concerns a lever and a transmission for a motor vehicle which is provided with such a lever which is utilised as the gear lever.
  • a motor vehicle transmission may be of a type comprising a change-speed gear box having a plurality of gear ratios which are mutually exclusively engageable so that at any instant only one of the ratios can be engaged.
  • a typical gear lever which is utilised for the gear ratio change is operated by- either a push or a pull action depending in which group of gears the selected gear is to be found.
  • Some motor vehicles incorporate a clutch control system which engages and disengages the clutch automatically in response to forces acting on the lever as a result of the vehicle driver initiating a gear change, or to other signals from the vehicle.
  • some motor vehicles may also incorporate an automatic gear ratio change system which responds to the vehicle driver initiating a gear change.
  • the present invention provides a new type of lever having force sensors which can be utilised as a gear lever and a clutch control system which utilise said force sensors to determine the direction of force acting on the gear knob.
  • a force sensitive lever which senses force acting on the lever, especially for use with a motor vehicle transmission
  • the lever comprising a lever and a knob
  • the knob comprising an outer body having a cavity therein to loosely receive an end portion of the lever, the cavity housing an elastomeric ring which in use locates the hub concentrically to said end portion of the lever, and at least one force sensitive resistor which senses loads acting on the elastomeric ring.
  • a force sensitive resistor is a device comprising a conductive printed area on polymer thick film that exhibits a decreasing electrical resistivity with an increasing force.
  • Such components are sold under the trade mark FSR by Interlink Electronics, P.O. Box 40760, Santa Barbara, California, USA.
  • the force sensitive resistors are located radially between the elastomeric ring and the end portion of the lever. By placing the elastomeric ring externally of the force sensitive resistors the forces acting on the force sensitive resistors are more evenly spread.
  • the above type of lever may form part of a control system for a motor vehicle having a clutch, a gear box operated by a gear lever or automatic gear ratio change system, and an engine, the control system including a control unit wherein at least one pair of force sensitive resistors in the gear knob is connected in-series between a reference voltage and a ground voltage, and the voltage from the junction between the two force sensitive resistors is utilised to determine the direction of force acting on the gear knob.
  • Fig 1 is a schematic of a clutch control system according to the invention.
  • Fig 2 is a longitudinal section through a gear lever according to the present invention, and as used in the system shown in Fig 1.
  • Fig 3 is a section on the line III-III of Fig 2.
  • Figs 4-6 are way of connecting individual force sensitive resistors into a clutch control system.
  • Fig 7 is an alternative means of connecting the pair of force sensitive resistors into a clutch control system.
  • Fig 8 shows direct connection of the force sensitive resistors into a microprocessor.
  • Fig 9 shows a schematic system initiating the signals from the lever for operating power assistance to the lever.
  • a motor vehicle comprises an engine 10 and a gear box 12 coupled to the engine through a clutch 14 via a gearbox input shaft 15.
  • Fuel is supplied to the engine by a throttle 16 which includes a throttle valve 18 operated by accelerator pedal 19.
  • the clutch 14 is actuated by a release fork 20 which is operated by a slave cylinder 22.
  • the gearbox is operated by a gear lever 24.
  • An engine speed signal generator comprises an engine speed sensor 26 which includes a transducer.
  • the state of the throttle valve 18 is monitored by a throttle valve position sensor 30.
  • the state of the gearbox 12 is monitored by a gear position sensor 32.
  • the position of the slave cylinder 22 is monitored by an actuation sensor 34.
  • the gear lever 24 includes a gear knob 25 which can send signals to the control unit 36 to initiate operation of the clutch for a gear change.
  • the gear knob 25 is shown in detail in Figs 2 and 3, mounted on a tubular gear lever 24.
  • the gear knob 25 comprises an outer body 51 formed from a moulded material, preferably a hard rubber material, which has a cavity 52 therein to receive the end portion of the gear lever 24.
  • the cavity 52 is lined with a plastic insert 53, which is preferably in the form of a inverted cup having a mouth 55 and end wall 57.
  • the insert 53 is moulded from nylon for example and the outer body 51 is assembled with the insert 53, preferably by moulding thereon.
  • the insert 53 has a plurality of circumferentially spaced slots 54 adjacent its mouth 55, and has a raised coaxial circular boss 56 on its end wall 57.
  • the insert 53 loosely engages the lever 24 so that the gear knob 25 can move radially with respect to the lever and, the boss 56 engages in the hollow centre at the end of the tubular lever 24 to limit the radial movement of the gear knob 25 with respect to the lever 24.
  • the upper end portion of the plastics insert 53 houses an elastomeric ring 58 which locates the knob 25 concentrically with the lever 24.
  • the elastomeric ring 58 is held in place by a retainer ring 59.
  • At least two force sensitive resistors 61 and perhaps four as shown in Fig 3 are located on diametrically opposite sides of the elastomeric ring 58 on its radially inner surface, so that the force sensitive resistors 61 are located between the elastomeric ring and the end portion of the lever 24.
  • the force sensitive resistors are preferably attached to the upper end portion of the lever 24 by adhesive.
  • the gear knob 25 is secured to the lever 24 by a sleeve 62 which is a sliding fit on the lever and has resilient catches 63 at its upper end for snap-fit engagement with slots 54 in the insert 53.
  • the sleeve has at least one spigot 64 on its inner surface for engagement with a hole 26 in the lever to secure the sleeve to the lever.
  • Formed integrally within the sleeve 62 are lead out contacts 65, wires 66 and terminals 67 for connection into the control unit 36.
  • the elastomeric ring 58 transmits any forces acting on the outer body 51 to the force sensitive resistors 61.
  • resistors 61 are positioned opposite to each other in “fore” and “aft” positions on the lever 24, and in the case where sideways forces are also measured additional resistors 61 are located on the lateral sides of the tube.
  • the resistors 61 may be connected into the control unit 36 in a number of different ways so that the resistance changes are detected and utilised to determine the magnitude and/or direction of force applied to the lever 24.
  • Figs 4-6 show means of connecting the separate force sensitive resistors 61 into the control unit 36.
  • force sensitive resistor 61 is connected in-series with a padding resistor Rl of fixed value between a reference voltage VI, say + five volts, and a ground voltage of zero volts.
  • the reference voltage may conveniently be the same reference voltage as is used in an analogue-to-digital converter in the control unit 36.
  • Voltage 'S' is taken from the junction 72 between the resistors 61 and Rl to an analogue circuit as shown in Fig 4, or a digital microprocessor circuit, to determine a "push” or “pull” force.
  • the resistors 61 and Rl can be interchanged and the other resistors R2, R3 which determine the input voltage into the negative input of the operational amplifier 73, and resistor R4 across the amplifier 73, are all of fixed value.
  • the voltage S from said junction 72 forms an input for an operational amplifier 73 and the amplifier output is used to determine "push" and "pull".
  • Fig 5 and Fig 6 show alternative way of connecting the force sensitive resistor 61 into an operational amplifier.
  • Fig 7 shows an alternative arrangement for pairs of force sensitive resistors 61.
  • Opposite pairs of resistors 61 eg. in a fore and aft arrangement, are located in series between a reference voltage VI and a ground voltage eg. zero volts.
  • the voltage S2 taken from the junction 172 between the two force sensitive resistors 61 is fed into a analogue circuit as shown to determine "push" "pull".
  • the signal S2 is fed into a microprocessor forming part of the control unit 36.
  • a power assisted shift arrangement for a lever according to the present invention.
  • the outputs 67 from the lever 24 having an analogue arrangement as shown in Fig 7 are fed into the control unit 36 which includes a push/pull decoder 70.
  • the decoder sends out a signal S3 which is say positive for a push, or negative for a pull.
  • the signal is fed into a threshold device 71 which compares the signal S3 to a threshold signal St and passes through signals that exceed a predetermined difference from the threshold signal St. This removes small signals S3 caused by vibrations or accidental touching of the knob 24.
  • the filtered signal S4 passes through a gain amplifier 72 and the amplified signal S5 is used to control an actuator 74 connected by a rod 75 to the lever 24 to assist shift of the lever in the direction required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Control Devices (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

Abstract

L'invention concerne un levier (24) qui détecte les forces agissant sur le levier (24) et qui comprend un bouton (25), ce bouton (25) comprenant un corps externe (51) ayant une cavité (52) pour recevoir avec jeu une extrémité du levier (24), la cavité (52) recevant un anneau en élastomère (58) qui en fonctionnement positionne le bouton d'une manière concentrique par rapport à ladite extrémité du levier. Au moins une résistance (61) sensible à la force détecte les charges agissant sur l'anneau en élastomère en étant disposée radialement entre l'anneau en élastomère (58) et l'extrémité du levier (24).
PCT/GB1993/001138 1992-08-28 1993-05-28 Levier de vitesses sensible aux forces WO1994005933A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9218324A GB2270143A (en) 1992-08-28 1992-08-28 Force sensitive lever.
GB9218324.3 1992-08-28

Publications (1)

Publication Number Publication Date
WO1994005933A1 true WO1994005933A1 (fr) 1994-03-17

Family

ID=10721104

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/001138 WO1994005933A1 (fr) 1992-08-28 1993-05-28 Levier de vitesses sensible aux forces

Country Status (2)

Country Link
GB (1) GB2270143A (fr)
WO (1) WO1994005933A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434135A1 (de) * 1994-09-24 1996-03-28 Bayerische Motoren Werke Ag Schalthebel für ein Kraftfahrzeuggetriebe
DE19609585A1 (de) * 1996-03-12 1997-09-18 Bayerische Motoren Werke Ag Verfahren zum Steuern eines stufenlosen Getriebes sowie Vorrichtung hierzu
EP0984186A3 (fr) * 1998-09-01 2001-01-17 Toyota Jidosha Kabushiki Kaisha Appareil de commande d'une chaine de transmission pour véhicules avec un embrayage automatique
DE10022814A1 (de) * 2000-05-10 2001-09-06 Daimler Chrysler Ag Schaltvorrichtung
AT413001B (de) * 2003-12-18 2005-09-26 Avl List Gmbh Messen der betätigungskräfte für einen schalthebel

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9317536D0 (en) * 1993-08-24 1993-10-06 Integrated Control Technologie Joystick controls
DE4427330C2 (de) * 1994-08-02 1999-10-21 Mannesmann Sachs Ag Anordnung und Verfahren zum Bestimmen des Schaltstellungszustandes eines Kraftfahrzeug-Schaltgetriebes
DE19581439D2 (de) * 1994-12-24 1997-06-05 Luk Getriebe Systeme Gmbh Vorrichtung und Verfahren zum Ansteuern eines zwischen einer Antriebseinheit und einem Getriebe wirksamen Drehmomentübertragungssystemes
EP0751322B1 (fr) * 1995-06-26 1999-01-07 Automobiles Peugeot Dispositif de commande d'une boíte de vitesses pour véhicule automobile
SE505092C2 (sv) * 1995-10-03 1997-06-23 Scandmec Ab Manöverspak
DE19650450A1 (de) * 1995-12-18 1997-06-19 Luk Getriebe Systeme Gmbh Betätigungseinrichtung
FR2749054B1 (fr) * 1996-05-23 1998-07-03 Renault Dispositif de changement de vitesses pour vehicule automobile qui procure une assistance au changement de certains rapports
DE19639289C1 (de) * 1996-09-25 1997-11-20 Daimler Benz Ag Automatisch gesteuerte Kupplung
JP2987121B2 (ja) * 1997-04-18 1999-12-06 京浜精密工業株式会社 パワーシフタの制御装置
SE0002870L (sv) * 2000-08-11 2001-09-17 Volvo Lastvagnar Ab Styrreglage
DE102004054258B3 (de) * 2004-11-09 2006-04-13 Voith Turbo Gmbh & Co. Kg Betätigungsvorrichtung zur Steuerung des Gangwechsels eines Kraftfahrzeuggetriebes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910388A (en) * 1973-08-07 1975-10-07 Nissan Motor Shifter with switches for sequentially operating a transmission and clutch
EP0050231A2 (fr) * 1980-10-17 1982-04-28 Bosch-Siemens HausgerÀ¤te GmbH Dispositif de commutation à résistance variable
DE3425876A1 (de) * 1984-07-13 1986-01-16 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Sensor zum erfassen der schaltbewegung eines kraftfahrzeuggetriebe-schalthebels
WO1990002895A1 (fr) * 1988-09-06 1990-03-22 Automotive Products Plc Levier de changement de vitesse pour transmission de vehicule
FR2646815A1 (fr) * 1989-05-10 1990-11-16 Fichtel & Sachs Ag Dispositif de commande automatique d'un embrayage de vehicule automobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673401B1 (fr) * 1991-03-01 1995-07-28 Valeo Levier de vitesses polarise pour commande d'un dispositif de changement de vitesses, notamment pour vehicules automobiles.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910388A (en) * 1973-08-07 1975-10-07 Nissan Motor Shifter with switches for sequentially operating a transmission and clutch
EP0050231A2 (fr) * 1980-10-17 1982-04-28 Bosch-Siemens HausgerÀ¤te GmbH Dispositif de commutation à résistance variable
DE3425876A1 (de) * 1984-07-13 1986-01-16 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Sensor zum erfassen der schaltbewegung eines kraftfahrzeuggetriebe-schalthebels
WO1990002895A1 (fr) * 1988-09-06 1990-03-22 Automotive Products Plc Levier de changement de vitesse pour transmission de vehicule
FR2646815A1 (fr) * 1989-05-10 1990-11-16 Fichtel & Sachs Ag Dispositif de commande automatique d'un embrayage de vehicule automobile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434135A1 (de) * 1994-09-24 1996-03-28 Bayerische Motoren Werke Ag Schalthebel für ein Kraftfahrzeuggetriebe
DE19609585A1 (de) * 1996-03-12 1997-09-18 Bayerische Motoren Werke Ag Verfahren zum Steuern eines stufenlosen Getriebes sowie Vorrichtung hierzu
EP0984186A3 (fr) * 1998-09-01 2001-01-17 Toyota Jidosha Kabushiki Kaisha Appareil de commande d'une chaine de transmission pour véhicules avec un embrayage automatique
DE10022814A1 (de) * 2000-05-10 2001-09-06 Daimler Chrysler Ag Schaltvorrichtung
AT413001B (de) * 2003-12-18 2005-09-26 Avl List Gmbh Messen der betätigungskräfte für einen schalthebel

Also Published As

Publication number Publication date
GB9218324D0 (en) 1992-10-14
GB2270143A (en) 1994-03-02

Similar Documents

Publication Publication Date Title
WO1994005933A1 (fr) Levier de vitesses sensible aux forces
EP0173054B1 (fr) Système véhiculaire anti-recul
US6474191B1 (en) Electronic accelerator pedal having a kickdown feature
US5295409A (en) Remote control lever module
CA1251250A (fr) Surcompresseur de frein a dispositif d'immobilisation d'un vehicule sur une pente
US4363389A (en) Vehicle transmission control system
US4352403A (en) Vehicle speed control system
KR100420383B1 (ko) 클러치제어시스템
GB2182410A (en) Hydraulic apparatus comprising master cylinder and slave cylinder with interlock switching device and proximity sensor
GB2215791A (en) Control system for a motor vehicle of the type including a clutch and a manual gearbox
WO1995022013A3 (fr) Systeme de commande d'embrayage
KR970046621A (ko) 자동차의 파워 트레인에서 조절 가능한 토오크 변속 시스템을 작동하는 방법 및 장치
US4488455A (en) Electronic shifting and ignition control system for motorcycles
US20020134611A1 (en) Electro-mechanical actuator for an adjustable pedal system
GB2313425A (en) Apparatus and method of rendering operative a clutch actuator
US4785222A (en) Apparatus for actuation of a setting element
US4431077A (en) Vehicle speed control system
EP1510731B1 (fr) Commande de boîte de vitesses
EP0323070A2 (fr) Commande intégrée du moteur et de l'embrayage
US4984455A (en) System for detecting speed of engine for vehicle
US4795864A (en) Control by switch under force of a declutching system at stop for automatic transmission
US6345566B1 (en) Hydraulic master cylinder with integral switch structure
US4553209A (en) Automobile speed control system
JPH058378Y2 (fr)
JPS616432A (ja) 自動クラツチの警告装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase