GB2125136A - A clutch/gearbox unit for a motor vehicle - Google Patents

A clutch/gearbox unit for a motor vehicle Download PDF

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Publication number
GB2125136A
GB2125136A GB08320835A GB8320835A GB2125136A GB 2125136 A GB2125136 A GB 2125136A GB 08320835 A GB08320835 A GB 08320835A GB 8320835 A GB8320835 A GB 8320835A GB 2125136 A GB2125136 A GB 2125136A
Authority
GB
United Kingdom
Prior art keywords
gearbox
clutch
input shaft
load condition
friction
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.)
Granted
Application number
GB08320835A
Other versions
GB2125136B (en
GB8320835D0 (en
Inventor
Dieter Lutz
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.)
Sachs Systemtechnik GmbH
Original Assignee
Sachs Systemtechnik GmbH
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 Sachs Systemtechnik GmbH filed Critical Sachs Systemtechnik GmbH
Publication of GB8320835D0 publication Critical patent/GB8320835D0/en
Publication of GB2125136A publication Critical patent/GB2125136A/en
Application granted granted Critical
Publication of GB2125136B publication Critical patent/GB2125136B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/308—Signal inputs from the transmission
    • F16D2500/30806—Engaged transmission ratio
    • F16D2500/30808—Detection of transmission in neutral
    • 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
    • F16D2500/31413—Clutch 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
    • F16D2500/50293—Reduction of vibrations
    • 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
    • F16D2500/70424—Outputting a clutch engaged-disengaged signal
    • 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
    • F16H2059/6823—Sensing neutral state of the transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The clutch/gearbox unit for a motor vehicle comprises a friction clutch (3) with a clutch disc (23) having a torsional vibration damper (25) in the torque transmission path between the friction linings (21) and the input shaft (5) of the gearbox (7). The torsional vibration damper (25) is only dimensioned for damping the vibrations arising in the torque transmission condition of the gearbox (7). The gearbox (7) comprises a sensor (39) which detects the no-load condition of the gearbox (7) (by sensing when the gear selector lever 13 is in neutral position) and produces a control signal designating the no-load condition. The friction clutch is disengaged by means of a driving device (35), responsive to the control signal, for the duration of the no-load condition. <IMAGE>

Description

SPECIFICATION A clutch/gearbox unit for a motor vehicle The invention relates to a clutch/gearbox unit for a motor vehicle and, in particular, to a unit whose friction clutch comprises a torsional vibration damper.
The clutch disc of a conventional friction clutch of a motor vehicle driven by an internalcombustion engine usually includes a torsional vibration damper. The object of the torsional vibration damper is to reduce the coefficient of cyclic irregularity of the internal-combustion engine in order to protect the torque transmitting elements during load operation. During no-load operation, the torsional vibration damper is meant to suppress gearbox noises which arise due to the fact that the gears of the gearbox, when the clutch is engaged, rotate in accordance with the idle speed of the internal-combustion engine.
From German utility model 80 04 841 there is known a clutch disc for a friction clutch where a centrifugally controlled operating device controls the damping characteristic of the torsional vibration damper as a function of speed. Above the idle speed the damping characteristic is adapted to the requirements of the load operation and below the idle speed it is adapted to the requirements of the no-load operation. Torsional vibration dampers of this kind are extremely complicated and are expensive in production and often do not have an adequate service life. Such torsional vibration dampers are mainly used in conjunction with diesel engines since these have a high coefficient of cyclic irregularity, particularly during idle running.
It is the object of the present invention to indicate a clutch/gearbox unit for a motor vehicle driven by an internal-combustion engine, more especially a diesel engine, which prevents torsional vibrations of the gearbox, particularly during no-load operation.
According to the invention, the torsional vibration damper of the friction clutch is dimensioned only for damping the vibrations arising in the torque transmission condition of the gearbox, that is to say during the load operation.
The gearbox comprises a sensor which detects the no-load condition of the gearbox, when the gearbox output shaft has been disconnected from the gearbox input shaft. The friction clutch can be engaged and disengaged by means of a controllable driving device. The sensor controls the driving device in such a way that the friction clutch is disengaged for the duration of the noload condition of the gearbox. The clutch disc, and thus the gearbox, is not driven during no-load operation, and therefore it is impossible for any noises to arise. Since the torsional vibration damper only has to be dimensioned for the load operation, simple vibration damper constructions can be used.
The driving device preferably is a positioning servo-motor such as is used in conjunction with semi- or fully automatic clutch control equipment, for example of the kind known from German Offenlegungsschrift 30 28 250. The driving device may be provided in addition to a conventional clutch pedal.
The invention will hereinafter be explained in more detail with reference to a drawing, in which the clutch/gearbox unit of a motor vehicle driven by an internal-combustion engine is diagrammatically shown.
A crankshaft 1 of an internal-combustion engine of a motor vehicle, more especially of a diesel engine, is connected via a friction clutch 3 to an input shaft 5 of a gearbox 7. The drive wheels of the motor vehicle, which are diagrammatically shown at 9, are non-rotatably connected to an output shaft 11 of the gearbox 7.
The torque transmitting speeds, and thus the transmission ratio of the gearbox 7, can be selected by means of a gear-change lever 13. In the neutral position of the change lever 13, the output shaft 11 is disconnected from the input shaft 5, but at least a proportion of the gears of the gearbox 7 continues to be non-rotatably connected to the input shaft 5.
The friction clutch 3 is of conventional design and comprises a flywheel 1 5 which is nonrotatably fitted to the crankshaft 1. Non-rotatably but axially displaceably guided on the flywheel 1 5 is a pressure plate 1 7 which is pressed- against the flywheel 1 5 by a diaphragm spring 19. The diaphragm spring 1 9 is supported with its outer circumference on the pressure plate 1 7 and along a smaller diameter on the flywheel 1 5. Between the pressure plate 1 7 and the fiywheel 1 5 there is clamped a clutch disc 23 which is provided with friction linings 21 and which is non-rotatably but axially displaceably guided on the input shaft 5 of the gearbox 7.The clutch disc 23 comprises a torsional vibration damper 25 which is dimensioned for the torque transmitting load operation of the gearbox 7. The torsional vibration damper 25 may be of conventional design and may comprise a spring damper and a friction damper.
For the control of the friction clutch there is provided a clutch pedal 27 which is operable by the driver of the motor vehicle and which is connected to a disengaging fork 31 via a linkage 29 or the like. The disengaging fork 31 acts on the diaphragm spring 1 9 via an operator 33 which is displaceable in the axial direction of the friction clutch 3. By depressing the clutch pedal 27 one can disengage the friction clutch 3.
The friction clutch 3 can be furthermore disengaged by a servo-motor 35. The servo-motor 35 is also connected to the disengaging fork 31 via a linkage 37 or the like and acts in parallel with the clutch pedal 27. A sensor 39 detects on the gearbox 7 whether the change lever 13 is in its neutral position. The sensor 39 controls the servo motor 35 via a line 41 in such a way that this motor keeps the friction clutch 3 disengaged as long as the change lever 13 is in its neutral position. When the friction clutch 3 is disengaged, the clutch disc 23, the input shaft 5 and the gears of the gearbox 7, which are non-rotatably connected to the input shaft 5, are at a standstill so that there do not arise any idle running noises which have to be damped.
Instead of controlling the friction clutch by means of a clutch pedal, there may be provided a semi- or fully automatic clutch control such as is described, for example, in German Offenlegungsschrift 30 28 250, in which case the servo-motor 35 may be utilised in addition to the program-controlled control of the friction clutch 3.

Claims (4)

1. A clutch/gearbox unit for a motor vehicle, comprising a) a gearbox (7) with an input shaft (5), an output shaft (11) and a gear-change lever (13), by means of which the gearbox (7) can be changed between a no-load condition, during which the output shaft (11) is disconnected from the input shaft (5), and at least one torque transmission condition, during which the output shaft (11) is non-rotatably connected to the input shaft (5) at a predetermined speed ratio, b) a friction clutch (3) with a clutch disc (23), which is non-rotatably connected to the input shaft (5) and carries friction linings (21), and with a torsional vibration damper (25) in the torque transmission path between the friction linings (21) of the clutch disc (23) and the input shaft (5) of the gearbox (7), and c) a control device (27, 31,33, 35) for engaging and disengaging the friction clutch (3), characterised in that the torsional vibration damper (25) is dimensioned for damping the vibrations arising in the torque transmission condition of the gearbox (7), and in that the gearbox (7) comprises a sensor (39) which detects the no-load condition of the gearbox (7) and produces a control signal designating the no-load condition, and in that the control device (27, 31, 33, 35) comprises a driving means (35) which is controllable in dependence on the control signal and which disengages the friction clutch (3) for the duration of the no-load condition.
2. A clutch as claimed in Claim 1, characterised in that the driving means is designed as a positioning servo-motor (35).
3. A clutch as claimed in Claim 1, characterised in that the control device (27, 31, 33, 35) comprises, in addition to the controllable driving means (35), a pedal (27), by means of which the friction clutch (3) can be disengaged independently of the driving means (35).
4. A clutch/gearbox unit for a motor vehicle substantially as herein described with reference to the accompanying drawing.
GB08320835A 1982-08-06 1983-08-02 A clutch/gearbox unit for a motor vehicle Expired GB2125136B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823229369 DE3229369A1 (en) 1982-08-06 1982-08-06 FRICTION COUPLING FOR INTERNAL COMMERCIAL ENGINE DRIVEN VEHICLES

Publications (3)

Publication Number Publication Date
GB8320835D0 GB8320835D0 (en) 1983-09-01
GB2125136A true GB2125136A (en) 1984-02-29
GB2125136B GB2125136B (en) 1986-03-19

Family

ID=6170278

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08320835A Expired GB2125136B (en) 1982-08-06 1983-08-02 A clutch/gearbox unit for a motor vehicle

Country Status (4)

Country Link
JP (1) JPS5958234A (en)
DE (1) DE3229369A1 (en)
FR (1) FR2531383A1 (en)
GB (1) GB2125136B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166823A2 (en) * 1984-07-02 1986-01-08 Volvo Car B.V. Disengaging means for a motor vehicle
FR2574720A1 (en) * 1984-12-13 1986-06-20 Valeo SPEED CHANGE DETECTION DEVICE FOR CONTROLLING A CLUTCH MANEUVER SYSTEM FROM THE MANEUVER TIMER OF A SPEED TRANSMISSION BOX
FR2611614A1 (en) * 1987-03-03 1988-09-09 Sachs Systemtechnik Gmbh POSITIONING DEVICE FOR A CLUTCH OF A MOTOR VEHICLE
FR2611837A1 (en) * 1987-02-26 1988-09-09 Valeo Device for actuating a clutch with control
CN1044737C (en) * 1994-07-15 1999-08-18 曼内斯曼.萨克斯股份公司 Seperated fly wheel apparatus
EP1777431A3 (en) * 2005-10-19 2008-06-25 Audi Ag Vehicle
EP1950447A1 (en) * 2007-01-24 2008-07-30 Delphi Technologies, Inc. Actuator system of a clutch device
EP1767803A3 (en) * 2005-09-23 2010-08-04 LuK Lamellen und Kupplungsbau Beteiligungs KG Method for clutch control
EP1408251A3 (en) * 2002-10-11 2010-10-13 Toyota Jidosha Kabushiki Kaisha Vehicle control apparatus with clutch-released maintaining means
WO2011087461A1 (en) * 2010-01-14 2011-07-21 Mohamad Hassan Dali Add your second semi automatic clutch easily for the stick shift gear box
CN102345732A (en) * 2010-08-02 2012-02-08 爱信Ai株式会社 A vehicular power transmission control apparatus
CN102767581A (en) * 2011-05-04 2012-11-07 罗伯特·博世有限公司 Clutch device capable of being manually operated
CN107795603A (en) * 2017-08-25 2018-03-13 武汉船用机械有限责任公司 A kind of clutch pushing device
CN115342132A (en) * 2022-07-08 2022-11-15 华北电力科学研究院有限责任公司 Rotating machinery on-line dynamic balance method and structure based on automatic synchronous clutch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011121309A1 (en) * 2011-12-15 2013-06-20 Gm Global Technology Operations, Llc Method for actuating a clutch, manual transmission control system, computer program product, computer program and signal sequence

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB864521A (en) * 1957-11-09 1961-04-06 Ferodo Sa Improvements in or relating to friction clutches

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB864521A (en) * 1957-11-09 1961-04-06 Ferodo Sa Improvements in or relating to friction clutches

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166823A3 (en) * 1984-07-02 1986-06-04 Volvo Car B.V. Disengaging means for a motor vehicle
EP0166823A2 (en) * 1984-07-02 1986-01-08 Volvo Car B.V. Disengaging means for a motor vehicle
FR2574720A1 (en) * 1984-12-13 1986-06-20 Valeo SPEED CHANGE DETECTION DEVICE FOR CONTROLLING A CLUTCH MANEUVER SYSTEM FROM THE MANEUVER TIMER OF A SPEED TRANSMISSION BOX
EP0186573A1 (en) * 1984-12-13 1986-07-02 Valeo Detection apparatus of a gear change for the control of the operating system of a clutch starting from the control gear of an associated gear change
FR2611837A1 (en) * 1987-02-26 1988-09-09 Valeo Device for actuating a clutch with control
FR2611614A1 (en) * 1987-03-03 1988-09-09 Sachs Systemtechnik Gmbh POSITIONING DEVICE FOR A CLUTCH OF A MOTOR VEHICLE
CN1044737C (en) * 1994-07-15 1999-08-18 曼内斯曼.萨克斯股份公司 Seperated fly wheel apparatus
EP1408251A3 (en) * 2002-10-11 2010-10-13 Toyota Jidosha Kabushiki Kaisha Vehicle control apparatus with clutch-released maintaining means
EP1767803A3 (en) * 2005-09-23 2010-08-04 LuK Lamellen und Kupplungsbau Beteiligungs KG Method for clutch control
EP1777431A3 (en) * 2005-10-19 2008-06-25 Audi Ag Vehicle
EP1950447A1 (en) * 2007-01-24 2008-07-30 Delphi Technologies, Inc. Actuator system of a clutch device
WO2011087461A1 (en) * 2010-01-14 2011-07-21 Mohamad Hassan Dali Add your second semi automatic clutch easily for the stick shift gear box
CN102345732A (en) * 2010-08-02 2012-02-08 爱信Ai株式会社 A vehicular power transmission control apparatus
CN102767581A (en) * 2011-05-04 2012-11-07 罗伯特·博世有限公司 Clutch device capable of being manually operated
CN107795603A (en) * 2017-08-25 2018-03-13 武汉船用机械有限责任公司 A kind of clutch pushing device
CN115342132A (en) * 2022-07-08 2022-11-15 华北电力科学研究院有限责任公司 Rotating machinery on-line dynamic balance method and structure based on automatic synchronous clutch

Also Published As

Publication number Publication date
GB2125136B (en) 1986-03-19
JPS5958234A (en) 1984-04-03
GB8320835D0 (en) 1983-09-01
DE3229369A1 (en) 1984-02-09
FR2531383A1 (en) 1984-02-10

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PCNP Patent ceased through non-payment of renewal fee