FR2739672A1 - Motor vehicle gearbox primary shaft speed detector - Google Patents

Motor vehicle gearbox primary shaft speed detector Download PDF

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Publication number
FR2739672A1
FR2739672A1 FR9511779A FR9511779A FR2739672A1 FR 2739672 A1 FR2739672 A1 FR 2739672A1 FR 9511779 A FR9511779 A FR 9511779A FR 9511779 A FR9511779 A FR 9511779A FR 2739672 A1 FR2739672 A1 FR 2739672A1
Authority
FR
France
Prior art keywords
sensor
gearbox
primary shaft
information
detector
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
FR9511779A
Other languages
French (fr)
Other versions
FR2739672B1 (en
Inventor
Sylvain Rivoiron
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR9511779A priority Critical patent/FR2739672B1/en
Publication of FR2739672A1 publication Critical patent/FR2739672A1/en
Application granted granted Critical
Publication of FR2739672B1 publication Critical patent/FR2739672B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/38—Inputs being a function of speed of gearing elements
    • 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
    • F16H59/36—Inputs being a function of speed
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H59/42—Input shaft speed

Abstract

The speed detector consists of a sensor (18) which detects the passage of a metal marker (16) connected to the gearbox primary shaft (2). The detector is situated on the outside of the gearbox, mounted e.g. on a bracket (19), and is in contact with the gearbox's aluminium end cover (8). The rotary marker (16) is attached to the hub (14) of a gearbox synchroniser (13), e.g. by a nut (17), and the detector is either magnetic or operates by the Hall effect. During operation the rotation of the marker is picked up by the detector and transmitted to a controlled clutch computer or other processing unit.

Description

DISPOSITIF DE PRISE D'INFORMATION DE VITESSE SUR
UN ARBRE PRIMAIRE DE BO1TE DE VITESSES MECANIOUE
La présente invention se rapporte à la prise d'information de vitesse sur un arbre primaire de boîte de vitesses mécanique. Elle trouve une application privilégiée mais non limitative dans la commande automatique des embrayages.DEVICE FOR TAKING SPEED INFORMATION ON
A PRIMARY GEARBOX SHAFT
The present invention relates to taking speed information on a primary shaft of a mechanical gearbox. It finds a preferred but non-limiting application in the automatic control of clutches.

La commande automatique de l'embrayage d'un véhicule routier dans un système dit d"'embrayage piloté" repose sur l'exploitation par un calculateur, de différentes informations, parmi lesquelles la vitesse de rotation du moteur et celle de l'arbre primaire de la boîte de vitesses, soit les vitesses de rotation de la ligne primaire de la transmission, avant et après l'embrayage.The automatic control of the clutch of a road vehicle in a so-called "piloted clutch" system is based on the operation by a computer, of various information, including the speed of rotation of the engine and that of the primary shaft. of the gearbox, i.e. the speeds of rotation of the primary line of the transmission, before and after the clutch.

Ce type de commande, illustré notamment par la publication FR2.432.399, selon laquelle un dispositif de contrôle déclenche l'actionnement d'un second moteur d'embrayage en fonction de la position de la pédale d'accélération etlou des vitesses mesurées en amont et en aval de l'embrayage, fonctionne aussi bien lors du démarrage du véhicule que lors du passage des vitesses en déplacement. Sa mise en oeuvre pose cependant un problème d'implantation des capteurs de vitesses, sur la ligne primaire de la transmission.This type of control, illustrated in particular by the publication FR2.432.399, according to which a control device triggers the actuation of a second clutch motor as a function of the position of the accelerator pedal and / or of the speeds measured upstream and downstream of the clutch, works both when starting the vehicle and when shifting shifting gears. Its implementation, however, poses a problem of installing speed sensors on the primary line of the transmission.

Selon une disposition connue, illustrée notamment par la publication EP-0.635.390, le carter de la boîte de vitesses peut être modifié pour monter à l'intérieur de celui-ci un capteur magnétique ou à effet Hall. According to a known arrangement, illustrated in particular by publication EP-0.635.390, the gearbox casing can be modified to mount inside it a magnetic or Hall effect sensor.

Sur les boîtes de vitesses fabriquées à cadence élevée, ce type d'adaptation se traduit malheureusement par un coût important, et introduit en usine de fabrication une diversité, dont la gestion présente un handicap certain. Enfin, il faut dans tous les cas prévoir une étanchéité entre le capteur et le carter, et ne pas perdre de vue le risque d'accumulation de limaille sur le nez du capteur.On gearboxes manufactured at high speed, this type of adaptation unfortunately results in a significant cost, and introduces diversity into the manufacturing plant, the management of which presents a certain handicap. Finally, it is necessary in all cases to provide a seal between the sensor and the casing, and not to lose sight of the risk of accumulation of filings on the nose of the sensor.

La présente invention vise à réduire au strict minimum les adaptations nécessaires à l'implantation d'un capteur de vitesses, sur l'arbre primaire d'une boîte de vitesses mécanique.The present invention aims to minimize the adaptations necessary for the installation of a speed sensor on the primary shaft of a mechanical gearbox.

Elle concerne un dispositif de prise d'information de vitesse sur l'arbre primaire d'une boîte de vitesses à l'aide d'un capteur détectant le passage d'une cible métallique liée en rotation audit arbre primaire. Ce dispositif est caractérisé en ce que le capteur est placé à l'extérieur de la boîte de vitesses.It relates to a device for taking speed information on the primary shaft of a gearbox using a sensor detecting the passage of a metal target linked in rotation to said primary shaft. This device is characterized in that the sensor is placed outside of the gearbox.

Selon une disposition particulière, le capteur est en contact avec un capot de fermeture de la boîte, rapporté sur le carter de mécanisme de celle-ci.According to a particular arrangement, the sensor is in contact with a cover for closing the box, attached to the mechanism housing of the latter.

De façon préférentielle, la cible tournante est fixée sur le moyeu d'un synchroniseur de la boîte de vitesses.Preferably, the rotating target is fixed to the hub of a gearbox synchronizer.

La présente invention sera mieux comprise à la lecture de la description suivante d'un mode de réalisation particulier de celle-ci en liaison avec les dessins annexés sur lesquels - la figure unique illustre le dispositif proposé. The present invention will be better understood on reading the following description of a particular embodiment thereof in conjunction with the appended drawings in which - the single figure illustrates the device proposed.

La boîte de vitesses mécanique 1 à arbres parallèles 2, 3 représentée partiellement en coupe longitudinale sur la figure est logée dans un carter de mécanisme 4 interrompu au niveau des roulements d'extrémité 6, 7 des arbres primaires et secondaire 2,3, et fermé par un capot en tôle d'aluminium 8 fixé sur un joint d'étanchéité 9. De façon classique, l'extrémité de l'arbre primaire 2 et de l'arbre secondaire 3 portent deux pignons 11, 12 en prise mutuelle, tels qu'un pignon fou de cinquième rapport 11 associé à un synchroniseur 13 monté autour d'un moyeu 14 solidaire de l'arbre primaire 2, et un pignon secondaire de cinquième 12.The mechanical gearbox 1 with parallel shafts 2, 3 shown partially in longitudinal section in the figure is housed in a mechanism casing 4 interrupted at the end bearings 6, 7 of the primary and secondary shafts 2,3, and closed by a cover made of aluminum sheet 8 fixed to a seal 9. Conventionally, the end of the primary shaft 2 and of the secondary shaft 3 carry two pinions 11, 12 in mutual engagement, such that a fifth gear idler 11 associated with a synchronizer 13 mounted around a hub 14 secured to the primary shaft 2, and a fifth fifth secondary gear 12.

Conformément à l'invention, une cible métallique 16 est maintenue par un élément de fixation, tel qu'un écrou 17 sur le moyeu 14 du synchroniseur 13, solidaire de l'arbre primaire 2. La cible 16 est donc liée en rotation à l'arbre primaire 2 de la boîte 1. Un capteur 18, tel qu'un capteur magnétique ou un capteur à effet Hall, fixé par une patte d'accrochage 19 sur le carter 4, est en contact avec le capot 8 de celuici. Le capot 8 étant constitué en tôle d'aluminium, et non en acier, ne fait pas écran à la détection du passage de la cible 16 par le capteur 18. Celui-ci est ainsi en mesure de mesurer la vitesse de rotation de l'arbre primaire, et de transmettre l'information à un calculateur d'embrayage piloté ou à tout autre unité de traitement.According to the invention, a metal target 16 is held by a fixing element, such as a nut 17 on the hub 14 of the synchronizer 13, secured to the primary shaft 2. The target 16 is therefore linked in rotation to the 'primary shaft 2 of the box 1. A sensor 18, such as a magnetic sensor or a Hall effect sensor, fixed by a lug 19 on the housing 4, is in contact with the cover 8 of this. The cover 8 being made of aluminum sheet, and not of steel, does not screen the detection of the passage of the target 16 by the sensor 18. The latter is thus able to measure the speed of rotation of the primary shaft, and to transmit the information to a controlled clutch computer or to any other processing unit.

Grâce à l'invention, l'implantation d'un capteur de vitesses sur l'arbre primaire de boîte de vitesses ne nécessite aucune modification du carter. De plus, le remplacement du capteur en cas de panne s'effectue sans démontage du capot ou du carter. Thanks to the invention, the installation of a speed sensor on the primary gearbox shaft does not require any modification of the casing. In addition, the replacement of the sensor in the event of a breakdown is carried out without removing the cover or the casing.

Claims (1)

REVENDICATIONS placé à l'extérieur la boîte de vitesses (1). audit arbre primaire (2), caractérisé en ce que le capteur (18) est détectant le passage d'une cible métallique (16) liée en rotation (2) d'une boîte de vitesses (1) à l'aide d'un capteur (18) [1] Dispositif de prise d'information de vitesse sur l'arbre primaire mécanisme (4) de celle-ci. capot de fermeture (8) de la boîte (1) rapporté sur le carter de caractérisé en ce que le capteur (18) est en contact avec un [2] Dispositif de prise d'information selon la revendication 1, moyeu (14) d'un synchroniseur (13) de la boîte de vitesses (1). caractérisé en ce que la cible tournante (16) est fixée sur le [3] Dispositif de prise d'information selon la revendication 1, 3, caractérisé en ce que le capot (8) est en aluminium. [4] Dispositif de prise d'information selon la revendication 1, 2 ou carter de mécanisme (4). précédentes, caractérisé en ce que le capteur (18) est fixé sur le [5] Dispositif de prise d'information selon l'une des revendications magnétique. précédentes, caractérisé en ce que le capteur (18) est un capteur [6] Dispositif de prise d'information selon l'une des revendications [7] Dispositif de prise d'information selon l'une des revendicationsCLAIMS placed outside the gearbox (1). to said primary shaft (2), characterized in that the sensor (18) is detecting the passage of a metallic target (16) linked in rotation (2) of a gearbox (1) using a sensor (18) [1] Device for taking speed information on the primary shaft mechanism (4) thereof. closing cover (8) of the box (1) attached to the casing, characterized in that the sensor (18) is in contact with a [2] Information taking device according to claim 1, hub (14) d '' a synchronizer (13) of the gearbox (1). characterized in that the rotating target (16) is fixed to the [3] Information acquisition device according to claim 1, 3, characterized in that the cover (8) is made of aluminum. [4] Information taking device according to claim 1, 2 or mechanism housing (4). previous, characterized in that the sensor (18) is fixed on the [5] Information acquisition device according to one of the magnetic claims. previous, characterized in that the sensor (18) is a sensor [6] Information acquisition device according to one of claims [7] Information acquisition device according to one of claims 1 à 5, caractérisé en ce que le capteur (18) est un capteur à effet 1 to 5, characterized in that the sensor (18) is an effect sensor Hall. Lobby. transmise à un calculateur d'embrayage piloté.  transmitted to a controlled clutch computer. précédentes, caractérisé en ce que l'information de vitesses est previous, characterized in that the speed information is [8] Dispositif de prise d'information selon l'une des revendications[8] Information acquisition device according to one of the claims
FR9511779A 1995-10-06 1995-10-06 DEVICE FOR TAKING SPEED INFORMATION ON A PRIMARY SHAFT OF A MECHANICAL GEARBOX Expired - Fee Related FR2739672B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9511779A FR2739672B1 (en) 1995-10-06 1995-10-06 DEVICE FOR TAKING SPEED INFORMATION ON A PRIMARY SHAFT OF A MECHANICAL GEARBOX

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9511779A FR2739672B1 (en) 1995-10-06 1995-10-06 DEVICE FOR TAKING SPEED INFORMATION ON A PRIMARY SHAFT OF A MECHANICAL GEARBOX

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FR2739672A1 true FR2739672A1 (en) 1997-04-11
FR2739672B1 FR2739672B1 (en) 1997-10-31

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001061216A3 (en) * 2000-02-14 2002-03-07 Mtd Products Inc Transmission with sensor for engine speed
EP1526305A3 (en) * 2003-10-25 2007-02-21 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Multiple ratio gearbox for internal combustion engine
FR2901361A1 (en) * 2006-05-17 2007-11-23 Renault Sas Primary shaft`s rotation speed measuring device for gearbox, has multipole magnetic reluctor connected on output pinion in front of fixed speed sensor, where output pinion is driven by primary shaft of gear box and mounted on reverse gear
WO2008110472A1 (en) * 2007-03-13 2008-09-18 Zf Friedrichshafen Ag Transmission having a rotational speed detecting device
EP2116744A1 (en) * 2008-05-09 2009-11-11 Magneti Marelli Powertrain S.p.A. Servo-assisted transmission with contactless position sensors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599356A (en) * 1982-07-07 1984-01-18 Nissan Motor Co Ltd Torque transmission
JPS599359A (en) * 1982-07-07 1984-01-18 Nissan Motor Co Ltd Torque transmission
JPH06327195A (en) * 1993-05-12 1994-11-25 Matsushita Electric Ind Co Ltd Speed detector
DE4415133C1 (en) * 1994-04-29 1995-06-01 Siemens Ag Automobile automatic transmission control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599356A (en) * 1982-07-07 1984-01-18 Nissan Motor Co Ltd Torque transmission
JPS599359A (en) * 1982-07-07 1984-01-18 Nissan Motor Co Ltd Torque transmission
JPH06327195A (en) * 1993-05-12 1994-11-25 Matsushita Electric Ind Co Ltd Speed detector
DE4415133C1 (en) * 1994-04-29 1995-06-01 Siemens Ag Automobile automatic transmission control device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 094 (M - 293) 28 April 1984 (1984-04-28) *
PATENT ABSTRACTS OF JAPAN vol. 94, no. 011 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001061216A3 (en) * 2000-02-14 2002-03-07 Mtd Products Inc Transmission with sensor for engine speed
EP1526305A3 (en) * 2003-10-25 2007-02-21 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Multiple ratio gearbox for internal combustion engine
FR2901361A1 (en) * 2006-05-17 2007-11-23 Renault Sas Primary shaft`s rotation speed measuring device for gearbox, has multipole magnetic reluctor connected on output pinion in front of fixed speed sensor, where output pinion is driven by primary shaft of gear box and mounted on reverse gear
WO2008110472A1 (en) * 2007-03-13 2008-09-18 Zf Friedrichshafen Ag Transmission having a rotational speed detecting device
EP2116744A1 (en) * 2008-05-09 2009-11-11 Magneti Marelli Powertrain S.p.A. Servo-assisted transmission with contactless position sensors

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Publication number Publication date
FR2739672B1 (en) 1997-10-31

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