EP0958448B1 - Procede de controle du debit d'huile dans un moteur deux temps a graissage separe et un moteur associe - Google Patents
Procede de controle du debit d'huile dans un moteur deux temps a graissage separe et un moteur associe Download PDFInfo
- Publication number
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- temperature
- flow rate
- lubricating oil
- oil
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000005461 lubrication Methods 0.000 title description 11
- 239000003921 oil Substances 0.000 claims description 37
- 239000010687 lubricating oil Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 5
- 238000013021 overheating Methods 0.000 description 3
- 235000021183 entrée Nutrition 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
- 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,
- 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.
Claims (8)
- Procédé de contrôle du débit d'huile de lubrification d'un moteur (1) à combustion interne à deux temps comportant un élément d'allumage et un circuit (2-5) 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.
- Procédé selon la revendication 1, caractérisé en ce que la température représentative de la charge thermique du moteur (1) est la température du joint (12) que porte l'élément d'allumage.
- Procédé selon l'une quelconque des revendications 1 à 2, caractérisé en ce que le débit d'huile de lubrification est augmenté quand la température représentative de la charge thermique du moteur dépasse une valeur de seuil prédéterminée.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le circuit (2-5) d'injection d'huile de lubrification comporte un circuit de fuite, l'action sur le débit d'huile de lubrification est obtenue en contrôlant la fermeture dudit circuit de fuite.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il consiste en outre à agir sur le débit d'huile en fonction de la charge mécanique et/ou du régime du moteur.
- Moteur à combustion interne à deux temps comprenant un élément d'allumage et un circuit d'injection d'un débit d'huile de lubrification caractérisé en ce qu'il comprend :un capteur (8) de mesure d'une température représentative de la charge thermique dudit moteur (1) disposé sur l'élément d'allumage et qui délivre sur une sortie un signal représentatif de ladite température,un module (7) 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 (3) de réglage du débit d'huile de lubrification, munis d'une entrée raccordée à la sortie du module de traitement,
- Moteur selon la revendication 6, caractérisé en ce que la capteur de mesure de la température représentative de la charge thermique du moteur est disposé sur un joint (12) que porte l'élément d'allumage.
- Moteur selon l'une quelconque des revendications 6 à 7, caractérisé en ce qu'il comprend en outre 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 (7) 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 (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9714752A FR2771448B1 (fr) | 1997-11-21 | 1997-11-21 | Procede de controle du debit d'huile dans un moteur deux temps a graissage separe et un moteur associe |
FR9714752 | 1997-11-21 | ||
PCT/FR1998/002488 WO1999027236A1 (fr) | 1997-11-21 | 1998-11-20 | Procede de controle du debit d'huile dans un moteur deux temps a graissage separe et un moteur associe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0958448A1 EP0958448A1 (fr) | 1999-11-24 |
EP0958448B1 true EP0958448B1 (fr) | 2003-09-03 |
Family
ID=9513737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98955711A Expired - Lifetime EP0958448B1 (fr) | 1997-11-21 | 1998-11-20 | Procede de controle du debit d'huile dans un moteur deux temps a graissage separe et un moteur associe |
Country Status (10)
Country | Link |
---|---|
US (1) | US6283072B1 (fr) |
EP (1) | EP0958448B1 (fr) |
JP (1) | JP2001513164A (fr) |
AR (1) | AR017656A1 (fr) |
BR (1) | BR9807109A (fr) |
DE (1) | DE69817767T2 (fr) |
ES (1) | ES2207009T3 (fr) |
FR (1) | FR2771448B1 (fr) |
TW (1) | TW432154B (fr) |
WO (1) | WO1999027236A1 (fr) |
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 |
US7953541B2 (en) * | 2008-07-31 | 2011-05-31 | General Electric Company | Method and system for reducing unburned fuel and oil from exhaust manifolds |
US8831858B2 (en) | 2008-07-31 | 2014-09-09 | General Electric Company | Methods and systems for operating an engine |
ITMI20120003U1 (it) * | 2012-01-05 | 2013-07-06 | Piaggio & C Spa | "sistema integrato di accensione e di alimentazione per motori a combustione interna" |
US10605132B2 (en) | 2015-11-12 | 2020-03-31 | Husqvarna Ab | 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 (fr) * | 1971-02-23 | 1972-10-13 | Alfa Romeo Spa | |
DE2411513A1 (de) * | 1974-03-11 | 1975-09-25 | Audi Nsu Auto Union Ag | Schmiervorrichtung fuer brennkraftmaschinen |
EP0508486B1 (fr) * | 1991-04-12 | 1996-10-02 | Yamaha Hatsudoki Kabushiki Kaisha | Méthode de lubrification d'un moteur à deux-temps, à combustion interne et système de prélèvement de l'huile de lubrification |
DE69214498T2 (de) * | 1991-04-25 | 1997-02-20 | Ngk Spark Plug Co | Vorrichtung zur provisorischen Befestigung eines Drucksensors in die Zündkerzenbohrung des Zylinderkopfes |
US5355851A (en) * | 1992-02-10 | 1994-10-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricating oil supplying system for two cycle engine |
EP0556437B1 (fr) * | 1992-02-15 | 1996-10-02 | Yamaha Hatsudoki Kabushiki Kaisha | Moteur à combustion interne avec un système de lubrification |
US5526783A (en) | 1992-06-29 | 1996-06-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricant control |
JPH06229219A (ja) * | 1993-02-03 | 1994-08-16 | Yamaha Motor Co Ltd | 2サイクルエンジンの潤滑装置 |
US5353753A (en) * | 1993-06-15 | 1994-10-11 | General Motors Corporation | Two-stroke engine lubrication |
-
1997
- 1997-11-21 FR FR9714752A patent/FR2771448B1/fr not_active Expired - Fee Related
-
1998
- 1998-11-20 WO PCT/FR1998/002488 patent/WO1999027236A1/fr active IP Right Grant
- 1998-11-20 BR BR9807109-2A patent/BR9807109A/pt not_active IP Right Cessation
- 1998-11-20 EP EP98955711A patent/EP0958448B1/fr not_active Expired - Lifetime
- 1998-11-20 JP JP52781299A patent/JP2001513164A/ja active Pending
- 1998-11-20 DE DE69817767T patent/DE69817767T2/de not_active Expired - Lifetime
- 1998-11-20 ES ES98955711T patent/ES2207009T3/es not_active Expired - Lifetime
- 1998-11-20 US US09/341,949 patent/US6283072B1/en not_active Expired - Fee Related
- 1998-11-20 AR ARP980105929A patent/AR017656A1/es active IP Right Grant
-
1999
- 1999-02-25 TW TW087119338A patent/TW432154B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0958448A1 (fr) | 1999-11-24 |
BR9807109A (pt) | 2000-04-25 |
DE69817767T2 (de) | 2004-03-18 |
ES2207009T3 (es) | 2004-05-16 |
FR2771448B1 (fr) | 1999-12-31 |
WO1999027236A1 (fr) | 1999-06-03 |
DE69817767D1 (de) | 2003-10-09 |
US6283072B1 (en) | 2001-09-04 |
FR2771448A1 (fr) | 1999-05-28 |
AR017656A1 (es) | 2001-09-12 |
TW432154B (en) | 2001-05-01 |
JP2001513164A (ja) | 2001-08-28 |
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