FR2880952A1 - Valve`s rotation movement characterizing method for internal combustion engine of motor vehicle, involves establishing variation curve of angular position of valve based on angular position of camshaft controlling valve - Google Patents
Valve`s rotation movement characterizing method for internal combustion engine of motor vehicle, involves establishing variation curve of angular position of valve based on angular position of camshaft controlling valve Download PDFInfo
- Publication number
- FR2880952A1 FR2880952A1 FR0550149A FR0550149A FR2880952A1 FR 2880952 A1 FR2880952 A1 FR 2880952A1 FR 0550149 A FR0550149 A FR 0550149A FR 0550149 A FR0550149 A FR 0550149A FR 2880952 A1 FR2880952 A1 FR 2880952A1
- Authority
- FR
- France
- Prior art keywords
- valve
- angular position
- camshaft
- motor vehicle
- rotation
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 title description 4
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000013519 translation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 8
- 239000013307 optical fiber Substances 0.000 description 6
- 238000012512 characterization method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
- G01P3/38—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light using photographic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
Abstract
Description
Procédé de mesure de rotation de soupapesMethod of measuring rotation of valves
La présente invention a pour objet un procédé permettant de caractériser et mesurer, sans contact, la rotation d'un objet présentant, simultanément à ladite rotation, un mouvement longitudinal. Préférentiellement, l'invention concerne un procédé de mesure de la rotation d'une soupape d'un moteur à combustion interne. 1a The present invention relates to a method for characterizing and measuring, without contact, the rotation of an object having, simultaneously with said rotation, a longitudinal movement. Preferably, the invention relates to a method for measuring the rotation of a valve of an internal combustion engine. 1a
Pendant le fonctionnement d'un moteur à combustion interne d'un véhicule automobile, chacune de soupapes se déplace longitudinalement avec une vitesse élevée, et présente, simultanément, un mouvement de rotation non continu. La rotation de ces soupapes permet, notamment, leur rodage, améliorant ainsi leur étanchéité, et, par Là, tes performances du moteur (optimisation de la consommation en carburant, réduction des émissions de polluants, etc...). La connaissance de la vitesse de rotation des soupapes, ainsi que la connaissance des moments précis du cycle au cours desquels cette rotation se produit, peut alors permettre de contrôler et de maîtriser ladite rotation, voire, dans certains cas, de la provoquer, afin d'améliorer ledit rodage desdites soupapes. During the operation of an internal combustion engine of a motor vehicle, each of the valves moves longitudinally with a high speed, and simultaneously presents a non-continuous rotational movement. The rotation of these valves allows, in particular, their break-in, thus improving their sealing, and, by There, your engine performance (optimization of fuel consumption, reduction of pollutant emissions, etc ...). The knowledge of the speed of rotation of the valves, as well as the knowledge of the precise moments of the cycle during which this rotation occurs, can then make it possible to control and control said rotation, or even, in certain cases, to provoke it, in order to improve said running of said valves.
Il n'existe, actuellement, aucune méthode permettant de déterminer avec précision tes moments du cycle auxquels se produit la rotation d'une soupape. There is currently no method for accurately determining the moments in the cycle at which the rotation of a valve occurs.
La mesure de la vitesse de rotation d'une soupape est, généralement, obtenue en filmant ladite soupape pendant un laps de temps suffisant (typiquement plusieurs cycles), puis en comptant, au visionnage dudit film, le nombre de rotations accomplies par ladite soupape pendant ce laps de temps. The measurement of the rotational speed of a valve is generally obtained by filming said valve for a sufficient period of time (typically several cycles), then counting, when viewing said film, the number of rotations performed by said valve during this time.
Le temps de mesure est toutefois relativement long, car la vitesse de rotation de ladite soupape est relativement faible: il est donc nécessaire de prolonger l'acquisition du film sur un grand nombre de cycles pour réaliser une mesure sur plusieurs rotations. De plus, la valeur de la vitesse de rotation ainsi calculée est une valeur moyennée sur l'ensemble des cycles filmés: il n'est donc pas possible, ainsi, d'atteindre une vitesse instantanée de rotation de ladite soupape. En outre, une telle méthode est relativement imprécise. The measurement time is relatively long, however, because the rotational speed of said valve is relatively low: it is therefore necessary to prolong the acquisition of the film over a large number of cycles to make a measurement over several rotations. In addition, the value of the rotational speed thus calculated is an averaged value over all the cycles filmed: it is therefore not possible, thus, to achieve an instantaneous speed of rotation of said valve. In addition, such a method is relatively imprecise.
D'autres méthodes consistent à mesurer l'angle de rotation de la soupape: ces méthodes impliquent 35 toutefois, en particulier, la mise en place et le réglage d'un ensemble de capteurs sur ladite soupape, et sont donc d'une mise en oeuvre relativement lourde. Other methods consist in measuring the angle of rotation of the valve: these methods, however, involve, in particular, the installation and adjustment of a set of sensors on said valve, and are therefore of a relatively heavy work.
Le document JP3189564 propose ta mise en place d'une fibre optique sur la soupape dont on souhaite connaître la vitesse de rotation, associée à une source de lumière placée dans la chambre de combustion et à trois autres fibres optiques placées en amont de ladite soupape, elles-mêmes reliées à des capteurs appropriés, et placées de telle manière que, lors de la rotation de ladite soupape, la lumière transmise par la première desdites fibres optiques est successivement transmise aux trois autres fibres optiques, permettant ainsi un suivi de la rotation de ladite soupape. La rotation de ladite soupape n'est toutefois, ici, suivie que partiellement: la précision de ce suivi dépend du nombre de fibres optiques associées à la première dite fibre, et un suivi précis de ladite io rotation implique alors un système de mesure relativement lourd et coûteux. La méthode est, de plus, intrusive, impliquant un usinage spécifique de ladite soupape pour y implanter ta première fibre optique. JP3189564 proposes the establishment of an optical fiber on the valve whose rotation speed is desired, associated with a light source placed in the combustion chamber and with three other optical fibers placed upstream of said valve, they are themselves connected to appropriate sensors, and placed in such a way that, during the rotation of said valve, the light transmitted by the first of said optical fibers is successively transmitted to the other three optical fibers, thus allowing a follow-up of the rotation of the said valve. The rotation of said valve is, however, only partially followed here: the accuracy of this monitoring depends on the number of optical fibers associated with the first said fiber, and a precise follow-up of said rotation then involves a relatively heavy measuring system. and expensive. The method is, moreover, intrusive, involving a specific machining of said valve to implement your first optical fiber.
La présente invention a pour but de proposer une méthode de détermination de la vitesse de 15 rotation d'une soupape, non intrusive, permettant en outre de connaître avec précision les moments du cycle de fonctionnement auxquels se produit cette rotation. It is an object of the present invention to provide a non-intrusive method of determining the rotational speed of a valve which furthermore enables the moments of the operating cycle in which this rotation occurs to be accurately known.
Dans ce but, l'invention a pour objet un procédé de caractérisation du mouvement de rotation d'une soupape commandée en translation par la rotation d'un arbre à cames, dans lequel un appareil de prise de vues rapide filme la face inférieure de ladite soupape, caractérisé en ce que la prise de vues par ledit appareil de prise de vues rapide est commandée par un dispositif de codage de la position angulaire dudit arbre à cames. For this purpose, the subject of the invention is a method for characterizing the rotational movement of a valve controlled in translation by the rotation of a camshaft, in which a fast-moving camera films the lower face of said camshaft. valve, characterized in that the shooting by said fast camera is controlled by a device for encoding the angular position of said camshaft.
Dans un mode de réalisation préféré de l'invention, un ensemble de repères est placé sur la face filmée de ladite soupape. In a preferred embodiment of the invention, a set of marks is placed on the filmed side of said valve.
Avantageusement, ladite face filmée de ladite soupape comporte un repère placé sensiblement en position axiale de ladite soupape, et un repère sensiblement placé en périphérie de ladite face filmée de ladite soupape. Advantageously, said filmed face of said valve comprises a mark placed substantially in the axial position of said valve, and a mark substantially placed at the periphery of said filmed face of said valve.
Avantageusement, l'invention peut également présenter une ou plusieurs des caractéristiques suivantes: ledit dispositif de prise de vues rapides est associé à des moyens de traitement d'image appropriés permettant d'enregistrer les positions respectives de chacun desdits repères lors de chaque prise de vue, lesdits moyens de traitement d'image sont associés à des moyens de calcul appropriés permettant, pour une prise de vue donnée, de relier lesdites positions respectives desdits repères à la position angulaire dudit arbre à cames. Advantageously, the invention may also have one or more of the following features: said fast-image-taking device is associated with appropriate image-processing means making it possible to record the respective positions of each of said markers during each shooting. , said image processing means are associated with appropriate calculation means making it possible, for a given shot, to connect said respective positions of said marks to the angular position of said camshaft.
D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit, en référence aux dessins annexés dans lesquels: la figure 1 est un schéma de principe du dispositif mettant en oeuvre le procédé selon l'invention, la figure 2 est une vue schématique de ta face de ta soupape étudiée au moyen du procédé selon l'invention. Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended drawings in which: FIG. 1 is a schematic diagram of the device implementing the method according to the invention, FIG. 2 is a schematic view of the face of the valve studied by means of the method according to the invention.
Une soupape 1, d'axe longitudinal Z, dont le mouvement de translation, représenté par la double flèche T sur la figure 1, est commandé par la rotation d'un arbre à cames (non représenté sur ta to figure 1), effectue également, à certains moments de son cycle de fonctionnement, un mouvement de rotation, représenté par la double flèche R sur la figure 1. Ce mouvement de rotation peut se produire pour n'importe quelle position de ladite soupape 1 dans la direction dudit axe Z. Pour la mesure, un miroir 2 est incliné, sensiblement à 45 par rapport à la face inférieure 3 de ladite soupape, de manière à renvoyer une image de ladite face inférieure 3 sur un appareil de prise de vues rapide 4: les traits plus clairs sur la figure 1 représentent schématiquement deux des trajets optiques permettant de reconstituer l'image de ladite face inférieure 3 de ladite soupape 1 sur ledit appareil de prises de vues rapide 4. Il est à noter qu'un dispositif annexe d'éclairement de ladite face inférieure 3 de ladite soupape 1, non représenté sur la figure 1, est également adjoint à l'ensemble du montage. A valve 1, of longitudinal axis Z, whose translational movement, represented by the double arrow T in FIG. 1, is controlled by the rotation of a camshaft (not shown in FIG. 1), also performs at certain times of its operating cycle, a rotational movement, represented by the double arrow R in Figure 1. This rotational movement can occur for any position of said valve 1 in the direction of said Z axis. For the measurement, a mirror 2 is inclined, substantially at 45 relative to the lower face 3 of said valve, so as to return an image of said lower face 3 to a fast camera 4: the brighter lines on FIG. 1 diagrammatically represent two optical paths making it possible to reconstitute the image of said lower face 3 of said valve 1 on said fast-moving camera 4. It should be noted that an auxiliary device for illumination of said lower face 3 of said valve 1, not shown in Figure 1, is also attached to the entire assembly.
Dans le procédé selon l'invention, un dispositif de codage de la position angulaire de l'arbre à cames gouvernant la soupape 1 commande la prise de vues au moyen dudit appareil de prise de vues rapide 4. In the method according to the invention, a device for coding the angular position of the camshaft governing the valve 1 controls the shooting by means of said fast camera 4.
Ainsi, chaque fois que ledit arbre à cames se déplace d'un angle do préalablement défini, un cliché de ladite face inférieure 3 de ladite soupape 1 est pris au moyen dudit appareil de prise de vues rapide 4. Thus, each time said camshaft moves at a predetermined angle α, a snapshot of said lower face 3 of said valve 1 is taken by means of said fast camera 4.
Les images prises par ledit dispositif de prises de vues 4 sont ensuite traitées au moyen d'un calculateur approprié 5. A cette fin, deux repères A et B sont réalisés sur ladite face inférieure 3 de ladite soupape 1. Préférentiellement, et afin de faciliter la prise de vues, ladite face inférieure 3 de ladite soupape 1 est peinte en noir, et tes deux dits repères A et B sont des cercles blancs de faible diamètre, rapportés sur ladite face inférieure 3. Ainsi que le présente la figure 2, t'un des repères, soit le repère A, est placé en position centrale sur ladite face inférieure 3 de ladite soupape 1, et l'autre repère, soit B, est placé à proximité du bord de ladite face inférieure 3 de ladite soupape 1. The images taken by said camera 4 are then processed by means of a suitable computer 5. For this purpose, two marks A and B are made on said lower face 3 of said valve 1. Preferably, and in order to facilitate the shooting, said lower face 3 of said valve 1 is painted black, and the two said marks A and B are white circles of small diameter, reported on said lower face 3. As shown in Figure 2, t one of the marks, namely the mark A, is placed in a central position on said lower face 3 of said valve 1, and the other mark, ie B, is placed near the edge of said lower face 3 of said valve 1.
A chaque variation do préalablement définie de la position angulaire dudit arbre à cames correspond ainsi une prise de vues, et une position Bo dudit repère B placé sur ladite face inférieure 3 de ladite soupape 2, décalée d'un angle do dans le plan de ladite face 3 par rapport à la position initiale BO dudit repère B. L'ensemble des positions Bo dudit repère B, correspondant à l'ensemble des positions do dudit arbre à cames, étant enregistré par un dispositif de traitement d'images approprié intégré audit calculateur 5, il est alors possible, par un traitement mathématique simple au moyen dudit calculateur approprié 5, d'établir la courbe de variation de la position angulaire do de ladite soupape 1 en fonction de ladite position angulaire do dudit arbre à cames commandant ladite soupape 1. Le procédé selon l'invention permet ainsi une mesure rapide et précise de la rotation instantanée de ladite soupape 1. La mesure étant réalisée sur la totalité de ta course en translation de ladite soupape 1, le procédé selon l'invention permet, en outre, de déterminer avec exactitude les instants du cycle de fonctionnement auxquels se produit la rotation de ladite soupape 1. Each variation previously defined of the angular position of said camshaft thus corresponds to a shooting, and a position Bo of said marker B placed on said lower face 3 of said valve 2, shifted by an angle in the plane of said face 3 with respect to the initial position BO of said mark B. The set of positions Bo of said mark B, corresponding to all of the positions of said camshaft, being recorded by an appropriate image processing device integrated with said calculator 5, it is then possible, by a simple mathematical treatment by means of said appropriate calculator 5, to establish the curve of variation of the angular position of said valve 1 as a function of said angular position of said camshaft controlling said valve 1 The method according to the invention thus allows a rapid and precise measurement of the instantaneous rotation of said valve 1. The measurement being made on the whole of your co urs in translation of said valve 1, the method according to the invention makes it possible, moreover, to determine exactly the instants of the operating cycle at which the rotation of said valve 1 occurs.
La mesure est également rapide et automatique, et sa précision peut être calibrée par la calibration des paramètres dudit appareil de prise de vues rapide 4 et du dispositif de traitement d'images et de calcul associés. The measurement is also fast and automatic, and its accuracy can be calibrated by calibrating the parameters of said fast camera 4 and the associated image processing and computation device.
Il est à noter qu'un tel procédé peut être appliqué à la caractérisation et à la mesure des déplacements d'autres types d'organes d'un véhicule automobile, par exemple et de manière non exhaustive:, caractérisation de mouvement de roues, paliers ou pièces en rotation, etc. .. It should be noted that such a method can be applied to the characterization and measurement of the displacements of other types of members of a motor vehicle, for example and in a non-exhaustive manner: characterization of wheel movement, bearings or rotating parts, etc. ..
Un tel procédé, en outre, ne nécessite que peu de matériel: s'il est préférentiellement utilisé sur bancs de test, il peut également être mis en oeuvre sur un véhicule proprement dit, ledit appareil de prise de vues rapide 4 et ledit dispositif de traitement d'images et de calcul appropriés 5 étant alors embarqués sur ledit véhicule. Such a method, moreover, requires only a little material: if it is preferentially used on test benches, it can also be implemented on a vehicle itself, said fast camera 4 and said camera. processing appropriate images and calculation 5 then being embedded on said vehicle.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0550149A FR2880952B1 (en) | 2005-01-19 | 2005-01-19 | METHOD FOR MEASURING ROTATION OF VALVES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0550149A FR2880952B1 (en) | 2005-01-19 | 2005-01-19 | METHOD FOR MEASURING ROTATION OF VALVES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2880952A1 true FR2880952A1 (en) | 2006-07-21 |
| FR2880952B1 FR2880952B1 (en) | 2007-02-16 |
Family
ID=34979318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0550149A Expired - Fee Related FR2880952B1 (en) | 2005-01-19 | 2005-01-19 | METHOD FOR MEASURING ROTATION OF VALVES |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2880952B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015517668A (en) * | 2012-05-25 | 2015-06-22 | マーポス、ソチエタ、ペル、アツィオーニＭａｒｐｏｓｓ Ｓ．Ｐ．Ａ． | Method for evaluating the rotational speed of a tool mounted on a rotating spindle of a machine tool and such a machine tool |
| WO2016148247A1 (en) * | 2015-03-18 | 2016-09-22 | 国立研究開発法人理化学研究所 | Device for measuring rotation of spherical body, measurement method, and program |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03189564A (en) * | 1989-12-20 | 1991-08-19 | Nissan Motor Co Ltd | Measuring instrument for valve rotation of internal combustion engine |
| DE20309702U1 (en) * | 2003-06-23 | 2003-09-04 | Mamerow Bernd | Gauge for valve movement in motor vehicle internal combustion engine, has ferromagnetic target attached to valve shaft and sensor to monitor movement |
-
2005
- 2005-01-19 FR FR0550149A patent/FR2880952B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03189564A (en) * | 1989-12-20 | 1991-08-19 | Nissan Motor Co Ltd | Measuring instrument for valve rotation of internal combustion engine |
| DE20309702U1 (en) * | 2003-06-23 | 2003-09-04 | Mamerow Bernd | Gauge for valve movement in motor vehicle internal combustion engine, has ferromagnetic target attached to valve shaft and sensor to monitor movement |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 015, no. 449 (P - 1275) 14 November 1991 (1991-11-14) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015517668A (en) * | 2012-05-25 | 2015-06-22 | マーポス、ソチエタ、ペル、アツィオーニＭａｒｐｏｓｓ Ｓ．Ｐ．Ａ． | Method for evaluating the rotational speed of a tool mounted on a rotating spindle of a machine tool and such a machine tool |
| WO2016148247A1 (en) * | 2015-03-18 | 2016-09-22 | 国立研究開発法人理化学研究所 | Device for measuring rotation of spherical body, measurement method, and program |
| JPWO2016148247A1 (en) * | 2015-03-18 | 2018-01-11 | 国立研究開発法人理化学研究所 | Apparatus for measuring rotation of spherical body, measuring method, and program |
| US10586339B2 (en) | 2015-03-18 | 2020-03-10 | Riken | Device for measuring rotation of spherical body, measurement method, and program |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2880952B1 (en) | 2007-02-16 |
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