EP0958448B1 - Method for controlling oil flow rate in a two-stroke engine with separate lubrication and related engine - Google Patents
Method for controlling oil flow rate in a two-stroke engine with separate lubrication and related engine Download PDFInfo
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- EP0958448B1 EP0958448B1 EP98955711A EP98955711A EP0958448B1 EP 0958448 B1 EP0958448 B1 EP 0958448B1 EP 98955711 A EP98955711 A EP 98955711A EP 98955711 A EP98955711 A EP 98955711A EP 0958448 B1 EP0958448 B1 EP 0958448B1
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- Prior art keywords
- engine
- temperature
- flow rate
- lubricating oil
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
- F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
Definitions
- the present invention relates to the field of combustion engines internal two-stage in which the oil is injected independently of gasoline. These motors are also called separate lubrication motors.
- the present invention relates to flow control, or dosing, of the oil injected into this type of engine.
- Known oil dosing systems generally include a mechanical dosing pump controlled according to parameters such as that the speed and / or the throttle position, this last parameter being representative of the engine load.
- EP-A-0 609 866 also discloses a process for controlling the flow of lubricating oil from an internal combustion engine two-stroke comprising a lubrication oil injection circuit, consisting in acting on the flow of lubricating oil as a function of the temperature of the coolant circulating in this engine.
- This process has the major drawback of requiring a circuit particular engine cooling by. a liquid, liquid circuit which is not a generalization for cooling this type of 2-stroke engine.
- lubrication systems are designed to guarantee a safety margin in the event of significant overheating of the engine (climbing a long hill for example).
- the most efficient systems operate according to parameters such as load and / or speed of the engine.
- the present invention makes it possible to solve the problems mentioned above, especially those related to engine overheating and excessive oil consumption.
- the present invention proposes to base the control of the oil flow on the temperature of an element of the engine representative of the charge level engine thermal, in this case the ignition element that includes usually this type of engine.
- the subject of the present invention is a method for controlling the two-stroke internal combustion engine lubricating oil flow comprising an ignition element and an oil injection circuit lubrication, consisting in acting on the flow of lubricating oil in function a temperature representative of the thermal load of said motor, characterized in that the temperature representative of the thermal load is the temperature of the ignition element.
- the temperature representative of the engine thermal load is the temperature of the seal worn by the ignition element.
- the lubrication oil flow is increased injected into the engine when the temperature representative of the load motor temperature exceeds a predetermined threshold value.
- the oil injection circuit includes a circuit for leakage
- the action on the lubrication oil flow can be obtained by controlling the closing of said leak circuit.
- the invention further relates to an internal combustion engine with two time including an ignition element and a flow injection circuit lubricating oil.
- the senor for measuring the temperature representative of the engine thermal load is then arranged on a seal carried by the ignition element.
- the motor according to the invention may comprise a sensor for load measurement and / or a speed measurement sensor of said engine, the output of each of them being connected to an input of said module further processing so that the lubricating oil flow is additionally modified according to the load and / or the engine speed.
- Figure 1 shows an air-cooled two-stroke engine 1, with a oil inlet pipe 2.
- the oil flow on this inlet is controlled by an element 3 such as a valve actuated by a solenoid.
- an oil tank 4 and a pump 5 constitute the oil supply controlled by the solenoid 3.
- the fuel supply is planned separately from the oil supply 2.
- the oil flow out of the pump 5 is divided into two conduits: the main supply conduit 2 engine and a bypass duct 10 where part of the oil is recycled upstream of the pump 5. It is preferable to insert a non-return valve 6 in the bypass duct 10.
- a second non-return valve 11 can also be installed on the main line 2, near the engine oil inlet to avoid especially the oil supply to the engine during its stop.
- the taring of second valve 11 is then a function of the calibration of valve 6.
- Main supply lines 2 and bypass lines 10 will be dimensioned to deliver a minimum flow required by the motor when the bypass duct 10 is open, and a maximum flow required by the motor when the bypass duct 10 is closed.
- the solenoid 3 can control the all-or-nothing opening of the bypass duct 10, allowing either a minimum flow rate (normal conditions; bypass open) or a maximum flow rate (conditions of thermal overload; bypass closed).
- the solenoid 3 may be move gradually (or at a variable frequency) and train a partial and variable closure system for the bypass duct 10: by example using a variable section needle.
- the opening of the conduit 10 will thus be done as and when the increase in the thermal load of the motor, thus allowing a gradual increase in the oil flow in said conduit 10.
- An electronic calculation unit 7 can advantageously be provided in particular to control the solenoid 3.
- the unit 7 is also connected to a element representative of the engine thermal load, in this case the spark plug ignition or more precisely to a temperature sensor 8 placed on the spark plug seal 12.
- the sensor 8 continuously supplies the temperature from the spark plug seal to the calculation unit 7 which itself and, depending in particular of the temperature supplied, controls the solenoid 3 in the manner indicated above.
- the oil pump 5 can also be connected to a pulley 9 itself connected to the throttle valve. This system allows you to control the flow through the engine load. It is not necessary for the implementation of the invention. It is an additional element that can improve the control of the flow via temperature.
- This additional element can be useful in case of failure of the temperature-related control system. It can thus be considered as a redundant element.
- a temperature threshold memorized in the unit 7, determines when the flow should be changed.
- the present invention allows better flow management oil, that is to say ultimately a reduction in consumption.
- the implementation of the present invention being directly related to engine temperature, a failure of the cooling is immediately taken into account and remedied. In effect as soon as the engine temperature rises, the oil flow is also increased, which can prevent engine breakage.
- witnesses or other means may also be provided in order to alert the driver at the origin of the problem.
- This figure shows a set of curves (A, B, C) of the couple C in function of the temperature T of a characteristic element of the temperature of the engine, here the temperature of the spark plug seal, for different ratios gasoline / lubricating oil mass.
- Engine lubrication is therefore directly linked to problems that appear in the engine as soon as lubrication is complete insufficient and that the oil film breaks.
- the problems of tightening are also linked to the thermal load level of the motor and mainly at the piston temperature. So the warmer the engine and the more the risks of tightening (therefore of deterioration of the motor) are important. At the same time, the lower the quantity of lubricant introduced (high fuel / lubricant ratio), the more the tightening appears at low temperature.
- the tightening is characterized by the sudden drop in the driving torque stopping the engine completely and damaging the piston and cylinder.
Description
La présente invention concerne le domaine des moteurs à combustion interne à deux temps dans lesquels l'huile est injectée indépendamment de l'essence. Ces moteurs sont encore appelés moteurs à graissage séparé.The present invention relates to the field of combustion engines internal two-stage in which the oil is injected independently of gasoline. These motors are also called separate lubrication motors.
Plus précisément la présente invention a trait au contrôle du débit, ou dosage, de l'huile injectée dans ce type de moteurs.More specifically, the present invention relates to flow control, or dosing, of the oil injected into this type of engine.
Les systèmes connus de dosage d'huile comprennent généralement une pompe-doseuse mécanique commandée en fonction de paramètres tels que le régime et/ou la position du papillon des gaz, ce dernier paramètre étant représentatif de la charge du moteur.Known oil dosing systems generally include a mechanical dosing pump controlled according to parameters such as that the speed and / or the throttle position, this last parameter being representative of the engine load.
Ces paramètres, couramment utilisés pour commander le dosage de l'huile, présentent cependant quelques inconvénients, particulièrement dans le cas des moteurs refroidis par air. Ils ne permettent pas, notamment, d'assurer un bon dosage quel que soit la charge et/ou le régime du moteur. En particulier, le dosage est inadapté lorsque le niveau thermique du moteur varie : pendant l'ascension d'une forte côte ou lors d'une défaillance du circuit de refroidissement par exemple.These parameters, commonly used to control the dosage of oil, however, have some drawbacks, particularly in the case of air-cooled engines. They do not allow, in particular, to ensure a good dosage whatever the load and / or the engine speed. In particular, the dosage is unsuitable when the engine thermal level varies: during the ascent of a steep hill or during a failure of the cooling system for example.
Des améliorations ont donc déjà été proposées comme par exemple dans la demande de brevet EP-A1-0577081. Selon ce document, on peut réajuster la quantité d'huile injectée en fonction de seuils mémorisés dans un calculateur ; on peut aussi faire varier le temps entre deux injections.Improvements have therefore already been proposed, for example in patent application EP-A1-0577081. According to this document, one can readjust the quantity of oil injected according to the thresholds stored in a calculator; you can also vary the time between two injections.
Cette solution technologique est avant tout fondée sur les valeurs de charge et de vitesse du moteur.This technological solution is above all based on the values of load and motor speed.
Il est également connu par le document EP-A-0 609 866 un procédé de contrôle du débit d'huile de lubrification d'un moteur à combustion interne à deux temps comportant un circuit d'injection d'huile de lubrification, consistant à agir sur le débit d'huile de lubrification en fonction de la température du liquide de refroidissement qui circule dans ce moteur.EP-A-0 609 866 also discloses a process for controlling the flow of lubricating oil from an internal combustion engine two-stroke comprising a lubrication oil injection circuit, consisting in acting on the flow of lubricating oil as a function of the temperature of the coolant circulating in this engine.
Ce procédé présente l'inconvénient majeur de nécessiter un circuit particulier de refroidissement du moteur par. un liquide, circuit liquide qui n'est pas une généralisation pour effectuer le refroidissement de ce type de moteur 2 temps.This process has the major drawback of requiring a circuit particular engine cooling by. a liquid, liquid circuit which is not a generalization for cooling this type of 2-stroke engine.
En effet, certains moteurs 2 temps sont refroidis par l'air ambiant et un procédé tel que décrit ci-dessus rie pourrait pas être appliqué.Indeed, some 2-stroke engines are cooled by ambient air and a method as described above could not be applied.
Le risque de détérioration du moteur peut être très important en cas de défectuosité du système de refroidissement ou en cas de surchauffe importante.The risk of engine damage can be very significant in the event of cooling system malfunction or overheating important.
Pour résoudre ce type de problèmes, les systèmes de lubrification actuels sont conçus pour garantir une marge de sécurité en cas de surchauffe importante du moteur (montée d'une longue côte par exemple).To solve this type of problem, lubrication systems are designed to guarantee a safety margin in the event of significant overheating of the engine (climbing a long hill for example).
Ces réglages entraínent donc une surconsommation d'huile lorsque le moteur fonctionne dans des conditions normales, moins sévères car la marge de sécurité existe quelles que soient les conditions de fonctionnement. These settings therefore lead to an overconsumption of oil when the engine operates under normal conditions, less severe because the safety margin exists whatever the conditions of operation.
Il y a actuellement peu de systèmes capables d'optimiser réellement la consommation d'huile.There are currently few systems capable of actually optimizing oil consumption.
De plus, comme souligné plus haut, les systèmes les plus performants fonctionnent en fonction de paramètres tels que charge et/ou vitesse du moteur. In addition, as pointed out above, the most efficient systems operate according to parameters such as load and / or speed of the engine.
Vis-à-vis de ces techniques connues, la présente invention permet de résoudre les problèmes évoqués ci-dessus, notamment ceux liés à la surchauffe du moteur et à la trop forte consommation d'huile.With respect to these known techniques, the present invention makes it possible to solve the problems mentioned above, especially those related to engine overheating and excessive oil consumption.
La présente invention propose de baser le contrôle du débit d'huile sur la température d'un élément du moteur représentatif du niveau de charge thermique du moteur, en l'occurence l'élément d'allumage que comporte habituellement ce type de moteur.The present invention proposes to base the control of the oil flow on the temperature of an element of the engine representative of the charge level engine thermal, in this case the ignition element that includes usually this type of engine.
Cette solution permet de réaliser un dosage fiable et précis, qui par une meilleure gestion, permet de réduire notablement la consommation d'huile, de l'ordre de 30% à 50%.This solution enables reliable and precise dosing, which by better management, significantly reduces consumption oil, in the range of 30% to 50%.
Ainsi la présente invention a pour objet un procédé de contrôle du débit d'huile de lubrification d'un moteur à combustion interne à deux temps comportant un élément d'allumage et un circuit d'injection d'huile de lubrification, consistant à agir sur le débit d'huile de lubrification en fonction d'une température représentative de la charge thermique dudit moteur, caractérisé en ce que la température représentative de la charge thermique est la température de l'élément d'allumage.Thus the subject of the present invention is a method for controlling the two-stroke internal combustion engine lubricating oil flow comprising an ignition element and an oil injection circuit lubrication, consisting in acting on the flow of lubricating oil in function a temperature representative of the thermal load of said motor, characterized in that the temperature representative of the thermal load is the temperature of the ignition element.
En accord avec ce mode de réalisation de l'invention, la température représentative de la charge thermique du moteur est la température du joint que porte l'élément d'allumage.In accordance with this embodiment of the invention, the temperature representative of the engine thermal load is the temperature of the seal worn by the ignition element.
De façon particulière, l'on augmente le débit d'huile de lubrification injectée dans le moteur lorsque la température représentative de la charge thermique du moteur dépasse une valeur de seuil prédéterminée.In particular, the lubrication oil flow is increased injected into the engine when the temperature representative of the load motor temperature exceeds a predetermined threshold value.
Par ailleurs, lorsque le circuit d'injection d'huile comporte un circuit de fuite, l'action sur le débit d'huile de lubrification peut être obtenue en contrôlant la fermeture dudit circuit de fuite. Furthermore, when the oil injection circuit includes a circuit for leakage, the action on the lubrication oil flow can be obtained by controlling the closing of said leak circuit.
Additionnellement, on agit sur le débit d'huile en fonction de la charge mécanique et/ou du régime du moteur. Additionally, we act on the oil flow depending on the load mechanical and / or engine speed.
L'invention vise en outre un moteur à combustion interne à deux temps comprenant un élément d'allumage et un circuit d'injection d'un débit d'huile de lubrification.The invention further relates to an internal combustion engine with two time including an ignition element and a flow injection circuit lubricating oil.
De façon caractéristique, le moteur comprend :
- un capteur de mesure d'une température représentative de la charge thermique dudit moteur disposé sur l'élément d'allumage et qui délivre sur une sortie un signal représentatif de ladite température,
- un module de traitement dudit signal, muni d'une entrée raccordée à la sortie du capteur de mesure de ladite température et d'une sortie qui délivre un signal de commande,
- des moyens de réglage du débit d'huile de lubrification, munis d'une entrée raccordée à la sortie du module de traitement,
- a sensor for measuring a temperature representative of the thermal load of said engine disposed on the ignition element and which delivers a signal representative of said temperature on an output,
- a module for processing said signal, provided with an input connected to the output of the sensor for measuring said temperature and with an output which delivers a control signal,
- means for adjusting the lubrication oil flow rate, provided with an inlet connected to the outlet of the treatment module,
Selon un mode de réalisation de l'invention, le capteur de mesure de la température représentative de la charge thermique du moteur est alors disposé sur un joint que porte l'élément d'allumage.According to one embodiment of the invention, the sensor for measuring the temperature representative of the engine thermal load is then arranged on a seal carried by the ignition element.
En outre, le moteur selon l'invention peut comprendre un capteur de mesure de la charge et/ou un capteur de mesure du régime dudit moteur, la sortie de chacun d'eux étant raccordée à une entrée dudit module de traitement de manière à ce que le débit d'huile de lubrification soit en outre modifié en fonction de la charge et/ou du régime du moteur.In addition, the motor according to the invention may comprise a sensor for load measurement and / or a speed measurement sensor of said engine, the output of each of them being connected to an input of said module further processing so that the lubricating oil flow is additionally modified according to the load and / or the engine speed.
La présente invention sera mieux comprise, d'autres éléments, détails et caractéristiques apparaítront plus clairement à la lecture de la description qui va suivre, faite à titre illustratif et nullement limitatif en référence aux figures annexées :
- La figure 1 est un schéma montrant les principaux éléments nécessaires à la mise en oeuvre de l'invention; et
- La figure 2 montre un ensemble de courbes du couple-moteur en fonction de la température d'un élément caractéristique du moteur.
- Figure 1 is a diagram showing the main elements necessary for the implementation of the invention; and
- FIG. 2 shows a set of curves of the engine torque as a function of the temperature of a characteristic element of the engine.
La figure 1 montre un moteur 1 deux temps refroidi par air, avec un
conduit arrivée d'huile 2. Le débit d'huile sur cette arrivée est commandé par
un élément 3 tel qu'une vanne actionnée par un solénoïde.Figure 1 shows an air-cooled two-
De façon classique un réservoir d'huile 4 et une pompe 5 constituent
l'alimentation d'huile contrôlée par le solénoïde 3.Conventionally, an oil tank 4 and a
L'arrivée d'essence, non représentée sur la figure 1, est prévue
séparément de l'arrivée d'huile 2.The fuel supply, not shown in Figure 1, is planned
separately from the
Dans le système présenté sur la figure 1, le débit d'huile sortant de la
pompe 5 est divisé en deux conduits : le conduit 2 d'alimentation principale
du moteur et un conduit 10 de by-pass où une partie de l'huile est recyclée
en amont de la pompe 5. Il est préférable d'insérer un clapet anti-retour 6
dans le conduit de by-pass 10.In the system shown in Figure 1, the oil flow out of the
Un deuxième clapet anti-retour 11 peut aussi être implanté sur le
conduit principal 2, près de l'entrée d'huile du moteur pour éviter en
particulier l'alimentation en huile du moteur pendant son arrêt. Le tarage du
deuxième clapet 11 est alors fonction du tarage du clapet 6. A second non-return valve 11 can also be installed on the
Les conduits d'alimentation principale 2 et de by-pass 10 seront
dimensionnés de façon à délivrer un débit minimum requis par le moteur
lorsque le conduit de by-pass 10 est ouvert, et un débit maximum requis par
le moteur lorsque le conduit de by-pass 10 est fermé.
Dans le cas d'un système simple, le solénoïde 3 pourra commander
l'ouverture tout ou rien du conduit 10 de by-pass, autorisant soit un débit mini
(conditions normales ; by-pass ouvert) soit un débit maxi (conditions de
surcharge thermique ; by-pass fermé).In the case of a simple system, the solenoid 3 can control
the all-or-nothing opening of the
Dans le cas d'un système plus sophistiqué, le solénoïde 3 pourra se déplacer de façon progressive (ou selon une fréquence variable) et entraíner un système de fermeture partielle et variable du conduit 10 de by-pass : par exemple à l'aide d'une aiguille de section variable.In the case of a more sophisticated system, the solenoid 3 may be move gradually (or at a variable frequency) and train a partial and variable closure system for the bypass duct 10: by example using a variable section needle.
L'ouverture du conduit 10 se fera ainsi au fur et à mesure de
l'augmentation de la charge thermique du moteur, permettant ainsi une
augmentation progressive du débit d'huile dans ledit conduit 10.The opening of the
Une unité de calcul électronique 7 peut être avantageusement prévue
afin notamment de contrôler le solénoïde 3. L'unité 7 est en outre reliée à un
élément représentatif de la charge thermique du moteur, en l'occurence la bougie
d'allumage ou plus précisément à un capteur de température 8 placé sur le
joint de bougie 12.An electronic calculation unit 7 can advantageously be provided
in particular to control the solenoid 3. The unit 7 is also connected to a
element representative of the engine thermal load, in this case the spark plug
ignition or more precisely to a temperature sensor 8 placed on the
Selon l'invention, le capteur 8 fournit en permanence la température du joint de bougie à l'unité de calcul 7 qui elle-même et, en fonction notamment de la température fournie, commande le solénoïde 3 de la façon indiquée ci-avant.According to the invention, the sensor 8 continuously supplies the temperature from the spark plug seal to the calculation unit 7 which itself and, depending in particular of the temperature supplied, controls the solenoid 3 in the manner indicated above.
La pompe à huile 5 peut en outre être reliée à une poulie 9 elle-même
reliée au papillon des gaz. Ce système permet de contrôler le débit via la
charge du moteur. Il n'est pas nécessaire à la mise en oeuvre de l'invention.
C'est un élément additionnel qui peut permettre d'améliorer le contrôle du
débit via la température.The
Cet élément additionnel peut s'avérer utile en cas de défaillance du système de contrôle lié à la température. Il peut ainsi être considéré comme un élément redondant.This additional element can be useful in case of failure of the temperature-related control system. It can thus be considered as a redundant element.
Dans tous les cas, le principe est le même ; il s'agit de corriger et/ou de contrôler le débit d'huile en fonction de la température d'un élément représentatif de la charge thermique du moteur.In all cases, the principle is the same; it is a question of correcting and / or control the oil flow according to the temperature of an element representative of the engine thermal load.
Lorsque la charge thermique augmente, le débit d'huile est corrélativement augmenté. Un seuil de température, mémorisé dans l'unité 7, détermine le moment où le débit doit être modifié.When the thermal load increases, the oil flow is correspondingly increased. A temperature threshold, memorized in the unit 7, determines when the flow should be changed.
Ainsi la présente invention permet une meilleure gestion du débit d'huile, c'est-à-dire finalement une réduction de la consommation.Thus the present invention allows better flow management oil, that is to say ultimately a reduction in consumption.
Par ailleurs la mise en oeuvre de la présente invention étant directement liée à la température du moteur, une défaillance du système de refroidissement est ainsi immédiatement prise en compte et remédiée. En effet dès que la température du moteur augmente, le débit d'huile est lui aussi augmenté, ce qui peut éviter la casse du moteur.Furthermore, the implementation of the present invention being directly related to engine temperature, a failure of the cooling is immediately taken into account and remedied. In effect as soon as the engine temperature rises, the oil flow is also increased, which can prevent engine breakage.
Des témoins ou autres moyens peuvent d'ailleurs être prévus afin d'alerter le conducteur dès l'origine du problème. Witnesses or other means may also be provided in order to alert the driver at the origin of the problem.
La figure 2 permet de mieux appréhender le problème à l'origine de l'invention.Figure 2 provides a better understanding of the problem behind the invention.
Cette figure montre un ensemble de courbes (A, B, C) du couple C en fonction de la température T d'un élément caractéristique de la température du moteur, ici la température du joint de bougie, pour différents rapports massiques essence/huile de lubrification.This figure shows a set of curves (A, B, C) of the couple C in function of the temperature T of a characteristic element of the temperature of the engine, here the temperature of the spark plug seal, for different ratios gasoline / lubricating oil mass.
Ces courbes font notamment apparaítre une chute brutale du couple à partir d'une certaine température du moteur, température caractéristique du serrage du moteur.These curves show in particular a sudden drop in torque to from a certain engine temperature, characteristic temperature of the engine tightening.
La lubrification d'un moteur est donc directement liée aux problèmes de serrage qui apparaissent dans le moteur dès que la lubrification est insuffisante et qu'il se produit une rupture du film d'huile. Les problèmes de serrage sont aussi liés au niveau de charge thermique du moteur et principalement à la température du piston. Ainsi plus le moteur est chaud et plus les risques de serrage (donc de détérioration du moteur) sont importants. Parallèlement plus la quantité de lubrifiant introduit est faible (rapport essence/lubrifiant élevé), plus le serrage apparaít à basse température.Engine lubrication is therefore directly linked to problems that appear in the engine as soon as lubrication is complete insufficient and that the oil film breaks. The problems of tightening are also linked to the thermal load level of the motor and mainly at the piston temperature. So the warmer the engine and the more the risks of tightening (therefore of deterioration of the motor) are important. At the same time, the lower the quantity of lubricant introduced (high fuel / lubricant ratio), the more the tightening appears at low temperature.
Le serrage est caractérisé par la chute brutale du couple entraínant l'arrêt complet du moteur et la détérioration du piston et du cylindre.The tightening is characterized by the sudden drop in the driving torque stopping the engine completely and damaging the piston and cylinder.
Comme on peut le voir sur la figure 2, le serrage apparaít vers 200°C pour un rapport essence/huile de 400:1 (courbe A). alors qu'il apparaít à 260°C si le rapport essence/huile diminue à 100 : 1 (courbe C).As can be seen in Figure 2, the tightening appears around 200 ° C for a petrol / oil ratio of 400: 1 (curve A). as he appears at 260 ° C if the petrol / oil ratio decreases to 100: 1 (curve C).
Le serrage apparaít vers 225°C lorsque le rapport essence/huile est de 200 : 1 (courbe B). The tightening appears around 225 ° C when the petrol / oil ratio is 200: 1 (curve B).
On voit ainsi l'intérêt de l'invention qui, en augmentant le débit d'huile lorsque la charge thermique augmente, assure une lubrification optimale quelles que soient les conditions de fonctionnement du moteur.This shows the advantage of the invention which, by increasing the oil flow when the thermal load increases, ensures optimal lubrication whatever the operating conditions of the engine.
Claims (8)
- Method for controlling the flow rate of lubricating oil of a two-stroke internal combustion engine (1) comprising an ignition element and a circuit (2-5) for injection of lubricating oil, consisting in acting on the flow rate of lubricating oil as a function of a temperature representative of the thermal load of said engine, characterised in that the temperature representative of the thermal load is the temperature of the ignition element.
- Method according to claim 1, characterised in that the temperature representative of the thermal load of the engine (1) is the temperature of the seal (12) carried by the ignition element.
- Method according to one of claims 1 to 2, characterised in that the flow rate of lubricating oil is increased when the temperature representative of the thermal load of the engine exceeds a predetermined threshold value.
- Method according to any one of claims 1 to 3, characterised in that the circuit (2-5) for injection of lubricating oil comprises a leakage circuit, the action on the flow rate of lubricating oil is obtained by controlling the closure of said leakage circuit.
- Method according to any one of claims 1 to 4, characterised in that it additionally consists in acting on the flow rate of oil as a function of the mechanical load and/or speed of the engine.
- Two-stroke internal combustion engine comprising an ignition element and a circuit for injection of a flow rate of lubricating oil, characterised in that it comprises:said adjusting means (3) reacting to the control signal prepared by the processing module (7) so that the flow rate of lubricating oil is modified as a function of a temperature representative of the thermal load of the engine measured by said pickup (8).a pickup (8) for measuring a temperature representative of the thermal load of said engine (1) disposed on the ignition element and delivering a signal representative of said temperature at an output,a module (7) for processing said signal, provided with an input connected to the output of the pickup for measuring said temperature and an output which delivers a control signal,means (3) for adjusting the flow rate of lubricating oil, provided with an input connected to the output of the processing module,
- Engine according to claim 6, characterised in that the pickup for measuring the temperature representative of the thermal load of the engine is disposed on a seal (12) carried by the ignition element.
- Engine according to one of claims 6 to 7, characterised in that it additionally comprises a pickup for measuring the load and/or a pickup for measuring the speed of said engine, the output of each of them being connected to an input of said processing module (7) such that the flow rate of lubricating oil is additionally modified as a function of the load and/or the speed of the engine (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9714752A FR2771448B1 (en) | 1997-11-21 | 1997-11-21 | METHOD FOR CONTROLLING THE OIL FLOW IN A SEPARATE LUBRICATION TWO-STROKE ENGINE AND A RELATED ENGINE |
| FR9714752 | 1997-11-21 | ||
| PCT/FR1998/002488 WO1999027236A1 (en) | 1997-11-21 | 1998-11-20 | Method for controlling oil flow rate in a two-stroke engine with separate lubrication and related engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0958448A1 EP0958448A1 (en) | 1999-11-24 |
| EP0958448B1 true EP0958448B1 (en) | 2003-09-03 |
Family
ID=9513737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98955711A Expired - Lifetime EP0958448B1 (en) | 1997-11-21 | 1998-11-20 | Method for controlling oil flow rate in a two-stroke engine with separate lubrication and related engine |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6283072B1 (en) |
| EP (1) | EP0958448B1 (en) |
| JP (1) | JP2001513164A (en) |
| AR (1) | AR017656A1 (en) |
| BR (1) | BR9807109A (en) |
| DE (1) | DE69817767T2 (en) |
| ES (1) | ES2207009T3 (en) |
| FR (1) | FR2771448B1 (en) |
| TW (1) | TW432154B (en) |
| WO (1) | WO1999027236A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386171B1 (en) * | 2000-10-12 | 2002-05-14 | Bombardier Motor Corporation Of America | Oil delivery system with oil temperature compensation control |
| US6964254B1 (en) * | 2004-02-06 | 2005-11-15 | Bombardier Recreational Products Inc. | Apparatus and method of conditioning an engine for storage |
| US8831858B2 (en) | 2008-07-31 | 2014-09-09 | General Electric Company | Methods and systems for operating an engine |
| US7953541B2 (en) * | 2008-07-31 | 2011-05-31 | General Electric Company | Method and system for reducing unburned fuel and oil from exhaust manifolds |
| ITMI20120003U1 (en) * | 2012-01-05 | 2013-07-06 | Piaggio & C Spa | "INTEGRATED IGNITION AND POWER SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINES" |
| EP3374608B1 (en) * | 2015-11-12 | 2019-07-31 | Husqvarna AB | A lubricating system, an engine and method for providing lubricant to an engine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2127694A5 (en) * | 1971-02-23 | 1972-10-13 | Alfa Romeo Spa | |
| DE2411513A1 (en) * | 1974-03-11 | 1975-09-25 | Audi Nsu Auto Union Ag | Oil and fuel lubrication for combustion engines - oil-fuel mixture is matched to engine operating condition |
| DE69214185T2 (en) | 1991-04-12 | 1997-02-20 | Yamaha Motor Co Ltd | Process for lubricating a two-stroke internal combustion engine and lubricating oil supply system |
| EP0510515B1 (en) * | 1991-04-25 | 1996-10-16 | NGK Spark Plug Co. Ltd. | Device for temporarily holding pressure sensor in place within spark plug attaching hole of cylinder head |
| US5355851A (en) * | 1992-02-10 | 1994-10-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricating oil supplying system for two cycle engine |
| EP0556437B1 (en) * | 1992-02-15 | 1996-10-02 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine with a lubricating system |
| US5526783A (en) | 1992-06-29 | 1996-06-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricant control |
| JPH06229219A (en) * | 1993-02-03 | 1994-08-16 | Yamaha Motor Co Ltd | Lubricating device for two-cycle engine |
| US5353753A (en) * | 1993-06-15 | 1994-10-11 | General Motors Corporation | Two-stroke engine lubrication |
-
1997
- 1997-11-21 FR FR9714752A patent/FR2771448B1/en not_active Expired - Fee Related
-
1998
- 1998-11-20 WO PCT/FR1998/002488 patent/WO1999027236A1/en active IP Right Grant
- 1998-11-20 AR ARP980105929A patent/AR017656A1/en active IP Right Grant
- 1998-11-20 DE DE69817767T patent/DE69817767T2/en not_active Expired - Lifetime
- 1998-11-20 JP JP52781299A patent/JP2001513164A/en active Pending
- 1998-11-20 ES ES98955711T patent/ES2207009T3/en not_active Expired - Lifetime
- 1998-11-20 EP EP98955711A patent/EP0958448B1/en not_active Expired - Lifetime
- 1998-11-20 US US09/341,949 patent/US6283072B1/en not_active Expired - Fee Related
- 1998-11-20 BR BR9807109-2A patent/BR9807109A/en not_active IP Right Cessation
-
1999
- 1999-02-25 TW TW087119338A patent/TW432154B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0958448A1 (en) | 1999-11-24 |
| JP2001513164A (en) | 2001-08-28 |
| DE69817767T2 (en) | 2004-03-18 |
| ES2207009T3 (en) | 2004-05-16 |
| FR2771448A1 (en) | 1999-05-28 |
| US6283072B1 (en) | 2001-09-04 |
| TW432154B (en) | 2001-05-01 |
| DE69817767D1 (en) | 2003-10-09 |
| FR2771448B1 (en) | 1999-12-31 |
| AR017656A1 (en) | 2001-09-12 |
| BR9807109A (en) | 2000-04-25 |
| WO1999027236A1 (en) | 1999-06-03 |
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