WO2003076227A1 - Dispositif de transmission pour vehicule automobile - Google Patents

Dispositif de transmission pour vehicule automobile Download PDF

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Publication number
WO2003076227A1
WO2003076227A1 PCT/SE2003/000352 SE0300352W WO03076227A1 WO 2003076227 A1 WO2003076227 A1 WO 2003076227A1 SE 0300352 W SE0300352 W SE 0300352W WO 03076227 A1 WO03076227 A1 WO 03076227A1
Authority
WO
WIPO (PCT)
Prior art keywords
engine
shaft
clutch
control unit
transmission device
Prior art date
Application number
PCT/SE2003/000352
Other languages
English (en)
Inventor
Anders Eriksson
Marcus Steen
Original Assignee
Volvo Lastvagnar Ab
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 Volvo Lastvagnar Ab filed Critical Volvo Lastvagnar Ab
Priority to AU2003220965A priority Critical patent/AU2003220965A1/en
Publication of WO2003076227A1 publication Critical patent/WO2003076227A1/fr

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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
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • 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
    • B60W30/1819—Propulsion control with control means using analogue circuits, relays or mechanical links
    • 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
    • B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
    • 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
    • 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
    • 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
    • B60W2510/1015—Input shaft speed, e.g. turbine 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
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal 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
    • 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
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B60W30/18136—Engine braking
    • 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
    • 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
    • F16D2500/1085—Automatic 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
    • F16D2500/3041—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
    • F16D2500/306—Signal inputs from the engine
    • F16D2500/3062—Engine braking signal indicating the use of the engine as a brake
    • 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
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle 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
    • F16D2500/30—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
    • F16D2500/31406—Signal inputs from the user input from pedals
    • F16D2500/3144—Accelerator pedal position
    • F16D2500/31453—Accelerator pedal position threshold, e.g. switch
    • 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
    • F16D2500/508—Relating driving conditions
    • F16D2500/5085—Coasting
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/84—Data processing systems or methods, management, administration

Definitions

  • the present invention relates to a transmission device for a motor vehicle, comprising an automated clutch coupled to the output shaft of an engine, a multi-stage gearbox with an input shaft which is mounted rotatably in a casing and to which the clutch is coupled, at least one intermediate shaft which is mounted in the casing and has at least one gearwheel in engagement with a gearwheel on the input shaft, a main shaft, mounted rotatably in the casing, with gearwheels which engage with gearwheels on the intermediate shaft, at least one gearwheel in each pair of intermeshing gearwheels on the intermediate shaft and the main shaft being mounted rotatably on its shaft and lockable on its shaft by coupling means.
  • the clutch is controlled by a control unit depending on signals fed into the control unit representing various engine and vehicle data comprising at least engine speed, vehicle speed and throttle pedal position.
  • Automatic gearboxes of the automated multi-stage gearbox type have become increasingly common in heavy- duty vehicles as microcomputer technology has developed further and made it possible, with a control computer and a number of actuators, for example servo motors, to precision-regulate engine speed, engagement and disengagement of an automated clutch between the engine and the gearbox and also the coupling means of the gearbox in relation to one another, so that soft shifting is always obtained at the correct engine speed.
  • actuators for example servo motors
  • the automatic gearbox constructed from planetary gears usually has one-way clutches between the planetary gear stages, which, when the engine is driving in the automatic transmission position, lock for torque transmission from the engine to the driving wheels but which, when torque transmission takes place in the opposite direction, that is to say with zero throttle and the vehicle in motion, disengage and allow the vehicle to roll freely without engine-braking, which results in lower fuel consumption by utilizing the motive energy of the vehicle than if the engine remains engaged and brakes. It has previously been possible to obtain the corresponding freewheel function in previously known automated multi-stage gearboxes only by manual disengagement of the clutch between the engine and the gearbox.
  • the object of the present invention is to produce a transmission comprising a multi-stage gearbox and also an automated disk clutch of the type indicated in the introduction, which is made in such a way that an automatic freewheel function corresponding to that in the conventional automatic gearbox with planetary gear stages and overrunning clutches can be obtained.
  • control unit is arranged so as, when input signals representing zero throttle are received, to give an output signal to disengage the clutch and so as, when the throttle is subsequently opened, to give an output signal to engage the clutch when the engine has reached a rotation speed which may differ from the rotation speed of said input shaft by at most a predetermined permitted speed difference.
  • an automated disk clutch arranged between the engine of the vehicle and the multi-stage gearbox, where the engine is equipped with an engine-braking device of, for example, the exhaust gas pressure regulator or compression brake type.
  • the control unit is arranged so as, when input signals representing zero throttle and engine brake switched off are received, to disengage the automated disk clutch.
  • the control unit in order to prevent a possible engine stoppage at the same time as the freewheel function is activated resulting in various servos, for example the steering and brake servos, ceasing to function by virtue of the fact that the servo pumps stop at the same time as the engine, the control unit is arranged so as, on receiving input signals which indicate that the engine is on the point of stopping and that a certain vehicle speed is present at the same time as said automated clutch (3) is disengaged, to give a signal to engage the automated clutch (3) .
  • the idling speed of the engine is normally adapted to prevailing conditions such as, for example, temperature conditions.
  • Figure 1 shows a diagrammatic representation of an internal combustion engine with adjacent clutch and gearbox
  • Figure 2 shows the clutch and the gearbox in Figure 1 on enlarged scale.
  • reference number 1 designates a six- cylinder internal combustion engine, for example a diesel engine, the crankshaft 2 of which is coupled to a single-plate dry disk clutch, designated generally by reference number 3, which is enclosed in a clutch case 4.
  • the crankshaft 2 is, via the output shaft 50 of the engine, connected non-rotatably to the clutch housing 5 of the clutch 3, while its plate 6 is connected non- rotatably to an input shaft 7 which is mounted rotatably in the casing 8 of a gearbox designated generally by reference number 9.
  • a main shaft 10 and an intermediate shaft 11 are also mounted rotatably in the casing 8.
  • a coupling sleeve 13 which is provided with synchronizing means and is mounted non-rotatably but axially displaceably on a hub 14 connected non-rotatably to the input shaft.
  • a gearwheel 15 mounted rotatably on the main shaft 10 is also lockable relative to the input shaft 7.
  • both the gearwheels 12 and 15 are disengaged from their shafts 7 and, respectively, 10.
  • the gearwheels 12 and 15 engage with gearwheels 16 and, respectively, 17 which are connected non-rotatably to the intermediate shaft 11.
  • Arranged in a rotationally fixed manner on the intermediate shaft 11 are further gearwheels 18, 19 and 20 which engage with gearwheels 21, 22 and, respectively, 23 which are mounted rotatably on the main shaft 10 and are lockable on the main shaft by means of coupling sleeves 24 and, respectively, 25 which, in the illustrative embodiment shown, do not have synchronizing devices.
  • a further gearwheel 28 is mounted rotatably on the main shaft 10 and engages with an intermediate gearwheel 30 which is mounted rotatably on a separate shaft 29 and in turn engages with the intermediate shaft gearwheel 20.
  • the gearwheel 28 is lockable on its shaft by means of a coupling sleeve 26.
  • the gearwheel pairs 12, 16 and 15, 17 and the coupling sleeve 13 form a split gearing with a low gear stage LS and a high gear stage HS .
  • the gearwheel pair 15, 17 also forms, together with the gearwheel pairs 21, 18, 22, 19, 23, 20 and 28, 30, a basic gearbox with four forward gears and one reverse gear.
  • a gearwheel 31 Arranged in a rotationally fixed manner on the output end of the main shaft is a gearwheel 31 which forms the sun gear in a two-stage range gear of planetary type which is designated by reference number 32 and the planet-wheel carrier 33 of which is connected in a rotationally fixed manner to a shaft 34 which forms the output shaft of the gearbox.
  • the planet wheels 35 of the range gear 32 engage with a ring gear 36 which, by means of a coupling sleeve 37, is lockable relative to the gearbox casing 8 for low range LR and relative to the planet- wheel carrier 33 for high range HR.
  • the coupling sleeves 13, 24, 25, 26 and 37 are displaceable as shown by the arrows in Figure 2, the gear stages shown in conjunction with the arrows being obtained.
  • the displacement is brought about by servo devices 40, 41, 42, 43 and 44 indicated diagrammatically in Figure 2, which can be pneumatically operated piston/cylinder arrangements of the type used in a gearbox of the type described above, which is marketed under the name Geartronic ® .
  • the servo devices 40, 41, 42, 43 and 44 are controlled by an electronic control unit 45 (see Figure 1) , comprising a microcomputer, depending on signals fed into the control unit representing various engine and vehicle data comprising at least engine speed, vehicle speed, throttle pedal position and, where appropriate, engine brake on/off, when an electronic gear selector 46 coupled to the control unit 45 is in its automatic transmission position.
  • an electronic gear selector 46 coupled to the control unit 45 is in its automatic transmission position.
  • the control unit 45 also controls the fuel injection, that is to say the engine speed, depending on the throttle pedal position and also the air supply to a pneumatic piston/cylinder arrangement 47, by means of which the disk clutch 3 is disengaged or engaged.
  • the control unit 45 is programmed so that the freewheel function is activated when the driver or the cruise control no longer requests either any fuel (zero throttle) or activation of an engine brake, for example an exhaust gas pressure regulator or a compression brake. This is effected by the control unit 45 first controlling the engine speed, so that no torque is transmitted between the output shaft 50 of the engine 1 and the input shaft 7 of the gearbox 9. The control unit 45 then gives a signal to the cylinder device 47 to disengage the disk clutch 3, after which the engine 1 is controlled to an idling speed. The drive line is then uncoupled, and the vehicle can roll freely. By disengaging the disk clutch, the freewheel function is obtained irrespective of which gear is engaged in the basic gearbox.
  • an engine brake for example an exhaust gas pressure regulator or a compression brake.
  • the control unit 45 is programmed to deactivate the freewheel function when the driver requests fuel with the throttle pedal or the cruise control or requests engine-braking by, for example, activating an exhaust gas brake or compression brake.
  • the control unit first regulates the engine speed in toward a speed which does not differ too greatly from the rotation speed of the input shaft before the disk clutch is engaged.
  • the drive line is then coupled together, and driving or engine-braking is possible again. If the speed difference on engagement is too great between the output shaft of the engine and the input shaft of the gearbox, the vehicle jerks. This is not acceptable in terms of comfort.
  • the disks in the clutch 3 wear abnormally. Other parts in the transmission are also subjected to higher stresses than normal .
  • a safety function in the event that the engine should stop when the freewheel function is activated.
  • the safety function involves the control unit 45 giving a signal to reengage the disk clutch 3 if the engine stops during freewheeling.
  • the disk clutch 3 is engaged, the engine is driven by the motive energy of the vehicle, and any auxiliary sets, such as servo pumps and engine brakes, normally driven by the engine are then driven by the vehicle via the engine .

Abstract

L'invention concerne un dispositif de transmission pour un véhicule automobile, comprenant un embrayage à disque automatique (3) couplé à l'arbre de sortie (50) d'un moteur (1), une boîte de vitesse (9) à plusieurs étages et une unité de commande permettant de commander l'embrayage à disque et le moteur. L'unité de commande (45) est conçue pour fournir un signal de sortie permettant le débrayage de l'embrayage à disque (3), à réception de signaux d'entrée représentant une commande des gaz nulle, et après ouverture de la commande des gaz, pour fournir un signal de sortie permettant l'embrayage de l'embrayage à disque (3), lorsque le moteur (1) à atteint une vitesse de rotation qui peut différer de la vitesse de rotation de l'arbre d'entrée (7) d'une valeur différentielle permise prédéterminée.
PCT/SE2003/000352 2002-03-13 2003-02-27 Dispositif de transmission pour vehicule automobile WO2003076227A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003220965A AU2003220965A1 (en) 2002-03-13 2003-02-27 Transmission device for motor vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0200756A SE521517C2 (sv) 2002-03-13 2002-03-13 Växellåda för motorfordon med en automatisk koppling
SE0200756-5 2002-03-13

Publications (1)

Publication Number Publication Date
WO2003076227A1 true WO2003076227A1 (fr) 2003-09-18

Family

ID=20287249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2003/000352 WO2003076227A1 (fr) 2002-03-13 2003-02-27 Dispositif de transmission pour vehicule automobile

Country Status (3)

Country Link
AU (1) AU2003220965A1 (fr)
SE (1) SE521517C2 (fr)
WO (1) WO2003076227A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1455108A1 (fr) * 2003-03-06 2004-09-08 LuK Lamellen und Kupplungsbau Beteiligungs KG Procédé pour contrôller un embrayage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601729A1 (fr) * 1992-12-09 1994-06-15 Eaton Corporation Système de commande d'un moteur avec régulaton automatique de l'embrayage
US5928110A (en) * 1997-02-27 1999-07-27 Luk Getriebe-Systeme Gmbh Power train with automated clutch for use in motor vehicles
EP1002687A2 (fr) * 1998-11-18 2000-05-24 Eaton Corporation Commande du couple de ralenti pour l'embrayage principal automatisé d'un véhicule
WO2001092049A1 (fr) * 2000-05-30 2001-12-06 Volvo Lastvagnar Ab Boite de vitesse pour vehicule a moteur
WO2001092048A1 (fr) * 2000-05-30 2001-12-06 Volvo Lastvagnar Ab Moyens d'entraînement pour automobiles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601729A1 (fr) * 1992-12-09 1994-06-15 Eaton Corporation Système de commande d'un moteur avec régulaton automatique de l'embrayage
US5928110A (en) * 1997-02-27 1999-07-27 Luk Getriebe-Systeme Gmbh Power train with automated clutch for use in motor vehicles
EP1002687A2 (fr) * 1998-11-18 2000-05-24 Eaton Corporation Commande du couple de ralenti pour l'embrayage principal automatisé d'un véhicule
WO2001092049A1 (fr) * 2000-05-30 2001-12-06 Volvo Lastvagnar Ab Boite de vitesse pour vehicule a moteur
WO2001092048A1 (fr) * 2000-05-30 2001-12-06 Volvo Lastvagnar Ab Moyens d'entraînement pour automobiles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1455108A1 (fr) * 2003-03-06 2004-09-08 LuK Lamellen und Kupplungsbau Beteiligungs KG Procédé pour contrôller un embrayage
US8057356B2 (en) 2003-03-06 2011-11-15 LuK Lamellen und Kupplungsbau Beteiligungsgesellschaft KG Method for controlling a clutch

Also Published As

Publication number Publication date
AU2003220965A1 (en) 2003-09-22
SE521517C2 (sv) 2003-11-11
SE0200756D0 (sv) 2002-03-13
SE0200756L (sv) 2003-09-14

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