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WO1992008065A1 - Systeme de commande d'embrayage - Google Patents

Systeme de commande d'embrayage Download PDF

Info

Publication number
WO1992008065A1
WO1992008065A1 PCT/GB1991/001722 GB9101722W WO9208065A1 WO 1992008065 A1 WO1992008065 A1 WO 1992008065A1 GB 9101722 W GB9101722 W GB 9101722W WO 9208065 A1 WO9208065 A1 WO 9208065A1
Authority
WO
WIPO (PCT)
Prior art keywords
speed
signal
clutch
engine
vehicle
Prior art date
Application number
PCT/GB1991/001722
Other languages
English (en)
Inventor
Roger Porter Jarvis
John Francis Gilbert
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 WO1992008065A1 publication Critical patent/WO1992008065A1/fr

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
    • 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
    • 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
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30426—Speed of the output 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
    • F16D2500/3067—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
    • F16D2500/308—Signal inputs from the transmission
    • F16D2500/3082—Signal inputs from the transmission from the output shaft
    • F16D2500/30825—Speed of the output 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
    • F16D2500/31—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
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50224—Drive-off
    • 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
    • F16D2500/50841—Hill hold
    • 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

Definitions

  • the present invention relates to a clutch control system for a vehicle.
  • the engine cannot be started due to failure or partial failure of the self-starting system, the engine cannot be started by any of the commonly accepted emergency starting means such as push-starting or two-starting. It is an object of the present invention to overcome these disadvantages .
  • the present invention provides a clutch control system for a vehicle having a clutch, a gearbox and an engine, the system comprising a vehicle speed sensor for generating a vehicle speed signal variable with the speed of the vehicle, an enging speed sensor for generating an engine speed signal variable with the speed of the engine, a reference signal generator for generating a reference signal , comparator means for comparing the engine and vehicle speed signals and the reference signal and clutch actuation means for increasing engagement of the clutch if either one of the engine or vehicle speed signals exceeds the reference signal.
  • Fig. 1 is a schematic of a control system according to a first embodiment of the present invention
  • Fig. 2 is an analogue circuit diagram of the control system of Fig. 1;
  • Fig. 3 s a block diagram showing the steps used in a microprocessor in a second embodiment of the invention.
  • a vehicle clutch system comprises an engine 10 and a gearbox 12 coupled 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 l8 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 speed of the gearbox input shaft 15 3 which is equal to that of a driven plate 40 of the clutch 14, is monitored by a driven plate speed sensor 42. Since the speed of the vehicle depends on the driven plate speed and the gear engaged, the driven plate speed sensor 42 acts in effect as a vehicle speed sensor. Signals from the sensors are transmitted to a control unit 36 which controls the actuation of the clutch via a hydraulic control 38.
  • the system also includes a choke position sensor 44 and a reference signal generator 4 ⁇ .
  • the throttle position sensor 30 produces a throttle signal Vt which is fed to an inverting input of a difference amplifier 5 via a limiter 48.
  • the limiter 48 receives an input from a switching circuit 49 •
  • a reference signal Vr f om the reference signal generator 46 is combined with a choke signal Vc from the choke position sensor 44 and input to the difference amplifier 50.
  • the output Vs of the difference amplifier 50 being the sum of Vt, Vr and Vc, forms a modified reference signal which fed to the input of a comparator 52.
  • the engine speed sensor 26 produces an engine speed signal Ve which is fed via the resistors Rl and R2 to the comparator 52.
  • the driven plate speed sensor 42 produces a signal V2 which is fed to a circuit containing diodes 54 and 5 and a high impedence buffer 58.
  • the diode 54 has its output connected to the driven plate speed sensor 4 and its input connected via a resistance R3 to a supply of constant voltage VI which in this case is 5 .
  • the input of the diode 54 s also connected via the high impedence buffer 58 to the input of the diode 56, the output of which is connected between resistors Rl and R2.
  • This circuit functions to make Vdp equal to V2 up to a maximum of V2.
  • the output Vdp from that circuit forms a vehicle speed signal which is fed to the junction between the resistors Rl and R2.
  • the resistor R2 is much larger than Rl for example 50 times larger such that the signal Vdp will overide the signal VE when Vdp is greater than VE i.e. when the driven plate speed, which is proportional to the vehicle speed exceeds the engine speed.
  • the resistors Rl and R2 and the comparator 5 together form comparator means for comparing the driven plate speed signal Vdp, the engine speed VE and the modified reference signal Vs.
  • the comparator 5 produces an error signal E which equals the difference between the modified reference signal Vs and a signal Vx equal to the greater of VE and Vdp.
  • the error signal E is fed to one input of a comparator 60, the other input of which receives a signal from a clutch position sensor 62.
  • the output from the comparator 60 is fed via a phase gain shaping network 64 to a mark to space ratio modulator 66 which also has as input a signal from an oscillator 67.
  • the output signal from the mark to space ratio modulator 66 is fed via an output 68 to a valve 70, which controls the position of the clutch 14 via a hydraulic control 72.
  • Vdp driven plate speed signal
  • Vdp will decrease unti it is lower than Vs and E starts to go positive.
  • the actuator 72 will start to disengage the clutch in that either Vdp is held at Vs and E is held at zero, or, if the vehicle is slowed by the brakes enough to hold Vdp below Vs, the clutch will be completely disengaged.
  • Vdp will be proportional to the speed at which the vehicle is rolling, but the constant of proportionability will depend on the state of the gearbox, i.e. which gear is engaged. Any parameter directly proportional to driven plate speed could be used to give a similar result.
  • Vdp could be obtained by a vehicle speed signal obtained from the speed of an output from the gearbox, or any other parameter directly proportional to vehicle speed.
  • the vehicle speed signal would advantageously be modified, depending on which gear is currently engaged, so as to be directly proportional to the driven plate speed.
  • the gear position sensor 32 would be used.
  • a microprocessor the processing of signals from the sensors and the production of a signal for actuation of the clutch is performed by a microprocessor.
  • a basic speed reference is retrieved, the value of the speed reference having been set when the microprocessor was produced.
  • the idle speed is examined. The idle speed would have a set value which could be set higher, eg for a cold start. If the idle speed is set high, the microprocessor proceeds to step 3 to compute an increased speed reference. If the idle speed is at its normal set value step 3 is by-passed and the speed reference is unaltered.
  • throttle setting signal is generated, and at step 5 the speed reference is increased by an incrementr dependent on the throttle setting signal.
  • an engine speed signal is generated and at step 7 a driven plate speed signal is generated. These are compared at step 8. The larger of the two is compared with the speed reference at step 9 to produce a speed error signal representing the difference between the engine speed or driven plate speed and the reference speed.
  • the error signal and the integral with respect to time of the error signal are generated at step 10 and combined to determine at step 11 a required clutch position. When the error is positive the error signal is used to calculate directly the required clutch position. However when the error is reaches zero or is negative the error signal and its integral are used in combination.
  • An actual clutch position signal is generated at step 12 and composed with the required clutch position signal at step 13 to produce a position error, which generates at step 14 an output signal for the control valve 70 of the clutch hydraulic actuation.
  • microprocessor may also be altered so as to operate in an equivalent manner to the analogue circuit described in our earlier patent No. 2079 888, which provides for an improved hill start capacity.
  • the part of the microprocessor which forms a comparator means for performing steps 6 to 9 could be arranged differently and the order of the comparisons of engine speed, driven plate speed and reference could be altered.
  • the engine speed signal and driven plate speed signal could each be compared with the reference signal to produce two error signals, the greater of which could be used to compute a required clutch position .

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

L'invention se rapporte à un système, qui sert à empêcher un véhicule de rouler au bas d'une pente sans qu'on le désire et à assurer un démarrage doux à l'arrêt et dans lequel des signaux dont les valeurs sont proportionnelles à la vitesse (Ve) du moteur et à la vitesse (Vdp) du plateau mené sont comparés et celui des deux signaux dont la valeur est plus grande est comparé à un signal de référence (Vs). Si le signal de référence est dépassé, l'embrayage (14) est engagé légèrement soit pour maintenir la vitesse du moteur égale à la vitesse de référence lors du démarrage à l'arrêt soit pour maintenir la vitesse du plateau mené égale à la vitesse de référence pour empêcher la mise en mouvement indésirée.
PCT/GB1991/001722 1990-11-02 1991-10-04 Systeme de commande d'embrayage WO1992008065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9023916A GB2250075B (en) 1990-11-02 1990-11-02 A clutch control system
GB9023916.1 1990-11-02

Publications (1)

Publication Number Publication Date
WO1992008065A1 true WO1992008065A1 (fr) 1992-05-14

Family

ID=10684801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001722 WO1992008065A1 (fr) 1990-11-02 1991-10-04 Systeme de commande d'embrayage

Country Status (2)

Country Link
GB (1) GB2250075B (fr)
WO (1) WO1992008065A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993010994A1 (fr) * 1991-11-27 1993-06-10 Automotive Products Plc Systeme de commande d'embrayage
AU640425B2 (en) * 1989-11-17 1993-08-26 Kabushiki Kaisha Komatsu Seisakusho Method and system of preventing wheel loader from slipping
WO1995022013A3 (fr) * 1994-02-12 1995-09-28 Automotive Products Plc Systeme de commande d'embrayage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9219101D0 (en) * 1992-09-09 1992-10-21 Automotive Products Plc A clutch control system
DE10037544A1 (de) * 1999-08-31 2001-03-01 Luk Lamellen & Kupplungsbau Getriebe
GB9927717D0 (en) * 1999-11-20 2000-01-19 Luk Getriebe Systeme Gmbh Clutch control system
GB2386932A (en) 2002-03-28 2003-10-01 Luk Lamellen & Kupplungsbau Method of controlling engine torque during a gear shift

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6364834A (ja) * 1986-09-05 1988-03-23 Hino Motors Ltd 自動トランスミツシヨン
FR2613987A1 (fr) * 1987-04-16 1988-10-21 Tallec Philippe Dispositif de commande automatique pour un embrayage a friction, applica
WO1990007438A1 (fr) * 1988-12-23 1990-07-12 Puglits Janos Systeme de commande automatique de l'embrayage de vehicules

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2088007B (en) * 1980-02-18 1984-03-21 Automotive Prod Co Ltd Clutch control apparatus
JPH0625568B2 (ja) * 1984-01-31 1994-04-06 富士重工業株式会社 電磁式クラツチ付無段変速機のクラツチ制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6364834A (ja) * 1986-09-05 1988-03-23 Hino Motors Ltd 自動トランスミツシヨン
FR2613987A1 (fr) * 1987-04-16 1988-10-21 Tallec Philippe Dispositif de commande automatique pour un embrayage a friction, applica
WO1990007438A1 (fr) * 1988-12-23 1990-07-12 Puglits Janos Systeme de commande automatique de l'embrayage de vehicules

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 289 (M-728)(3136) 8 August 1988 & JP,A,63 064 834 ( HINO MOTORS ) 23 March 1988 see abstract *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU640425B2 (en) * 1989-11-17 1993-08-26 Kabushiki Kaisha Komatsu Seisakusho Method and system of preventing wheel loader from slipping
WO1993010994A1 (fr) * 1991-11-27 1993-06-10 Automotive Products Plc Systeme de commande d'embrayage
US5489012A (en) * 1991-11-27 1996-02-06 Automotive Products, Plc Clutch control system
WO1995022013A3 (fr) * 1994-02-12 1995-09-28 Automotive Products Plc Systeme de commande d'embrayage
GB2292591A (en) * 1994-02-12 1996-02-28 Automotive Products Plc Clutch control system
US5679098A (en) * 1994-02-12 1997-10-21 Automotive Products, Plc Clutch control system
GB2292591B (en) * 1994-02-12 1998-06-10 Automotive Products Plc Clutch control system
CN1071869C (zh) * 1994-02-12 2001-09-26 卢克利明顿有限公司 离合器控制系统

Also Published As

Publication number Publication date
GB2250075A (en) 1992-05-27
GB9023916D0 (en) 1990-12-12
GB2250075B (en) 1994-09-07

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