EP0958448A1 - Durchflusssteurungsverfahren der schmieröl einer zweitakt brennkraftmaschine mit getrennter schmierung - Google Patents

Durchflusssteurungsverfahren der schmieröl einer zweitakt brennkraftmaschine mit getrennter schmierung

Info

Publication number
EP0958448A1
EP0958448A1 EP98955711A EP98955711A EP0958448A1 EP 0958448 A1 EP0958448 A1 EP 0958448A1 EP 98955711 A EP98955711 A EP 98955711A EP 98955711 A EP98955711 A EP 98955711A EP 0958448 A1 EP0958448 A1 EP 0958448A1
Authority
EP
European Patent Office
Prior art keywords
engine
temperature
thermal load
representative
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.)
Granted
Application number
EP98955711A
Other languages
English (en)
French (fr)
Other versions
EP0958448B1 (de
Inventor
Jacques Lavy
Yoichi Ishibashi
Philippe Girard
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.)
IFP Energies Nouvelles IFPEN
Total Marketing Services SA
Honda R&D Co Ltd
Original Assignee
Elf Antar France
IFP Energies Nouvelles IFPEN
TotalFinaElf France SA
Honda R&D Co Ltd
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 Elf Antar France, IFP Energies Nouvelles IFPEN, TotalFinaElf France SA, Honda R&D Co Ltd filed Critical Elf Antar France
Publication of EP0958448A1 publication Critical patent/EP0958448A1/de
Application granted granted Critical
Publication of EP0958448B1 publication Critical patent/EP0958448B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 two-stroke internal combustion engines in which the oil is injected independently of the petrol. These motors are also called separate lubrication motors.
  • the present invention relates to controlling the flow rate, or metering, of the oil injected into this type of engine.
  • Known oil metering systems generally comprise a mechanical metering pump controlled as a function of parameters such as the speed and / or the position of the throttle valve, this latter parameter being representative of the engine load.
  • the present invention proceeds from a different technical choice.
  • the present invention proposes to base the control of the oil flow on the temperature of an element of the engine representative of the level of thermal load of the engine.
  • the risk of engine damage can be very significant in the event of a fault in the cooling system or in the event of significant overheating.
  • the most efficient systems operate according to parameters such as load and / or engine speed.
  • the present invention makes it possible to solve the problems mentioned above, in particular those linked to the overheating of the engine and the excessive consumption of oil.
  • the subject of the present invention is a method for controlling the flow of lubricating oil of a two-stroke internal combustion engine comprising a circuit for injecting lubricating oil, which consists in acting on the oil flow lubrication as a function of a temperature representative of the engine thermal load.
  • the temperature representative of the thermal load is the temperature of an element constituting said motor.
  • the engine comprises an ignition element provided with a seal.
  • the temperature representative of the thermal load of the engine is the temperature of said seal.
  • the temperature representative of the thermal load of the engine is the temperature of the ignition element.
  • the flow rate of lubricating oil injected into the engine is increased when the temperature representative of the engine thermal load exceeds a predetermined threshold value.
  • the action on the lubrication oil flow can be obtained by controlling the closing of said leak circuit.
  • the invention further relates to a two-stroke internal combustion engine comprising a circuit for injecting a flow of lubricating oil.
  • the engine includes:
  • a sensor for measuring a temperature representative of the thermal load of said motor which delivers a signal representative of said temperature to 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
  • said adjustment means reacting to the control signal produced by the processing module 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 temperature sensor which is disposed on a component of said motor.
  • the engine is air cooled and comprises an ignition element provided with a seal, the sensor for measuring the temperature representative of the thermal load of the engine is then placed on said seal.
  • the engine according to the invention comprising an ignition element, the temperature measurement sensor is disposed on said ignition element.
  • the engine according to the invention may comprise a load measurement sensor and / or a speed measurement sensor of said engine, the output of each of them being connected to an input of said module. treatment so that the flow of lubricating oil is further modified according to the load and / or the engine speed.
  • FIG. 1 is a diagram showing the main elements necessary for the implementation of the invention.
  • FIG. 2 shows a set of engine torque curves as a function of the temperature of a characteristic element of the engine.
  • FIG. 1 shows an air-cooled two-stroke engine 1 with an oil inlet pipe 2.
  • the flow of oil 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 inlet is provided separately from the oil inlet 2.
  • the oil flow leaving the pump 5 is divided into two conduits: the main motor supply conduit 2 and a bypass conduit 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 by-pass duct 10.
  • a second non-return valve 11 can also be installed on the main conduit 2, near the engine oil inlet to avoid in particular the supply of engine oil during its stop.
  • the calibration of the second valve 11 is then a function of the calibration of the valve 6.
  • the main supply 2 and bypass ducts 10 will be dimensioned so as to deliver a minimum flow rate required by the motor when the bypass duct 10 is open, and a maximum flow rate required by the motor when the bypass duct -pass 10 is closed.
  • the solenoid 3 can command the all-or-nothing opening of the by-pass duct 10, allowing either a minimum flow (normal conditions; open by-pass) or a maximum flow (overload conditions thermal; bypass closed).
  • the solenoid 3 can move gradually (or according to a variable frequency) and cause a partial and variable closure system of the bypass duct 10: for example using d '' a needle of variable section.
  • the opening of the conduit 10 will thus take place as the thermal load of the engine increases, thereby allowing a gradual increase in the oil flow rate in said conduit 10.
  • An electronic calculation unit 7 can advantageously be provided in order in particular to control the solenoid 3.
  • the unit 7 is also connected to an element representative of the thermal load of the engine such as the spark plug or more precisely to a sensor of temperature 8 placed on the spark plug seal 12.
  • the senor 8 permanently supplies the temperature of the spark plug seal to the calculation unit 7 which itself and, in particular as a function 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 which is itself connected to the throttle valve. This system makes it possible to control the flow rate via the engine load. It is not necessary for the implementation of the invention. It is an additional element that can improve flow control via temperature.
  • This additional element can be useful in the event of a temperature control system failure. It can thus be considered as a redundant element.
  • the control of the oil flow by the unit 7 can be envisaged via a temperature sensor representative of the level of thermal load of the engine.
  • a coolant temperature sensor can allow this control.
  • a temperature sensor for the jacket, the casing or the exhaust can also be provided, in particular in the case of an air-cooled engine.
  • a temperature threshold memorized in unit 7, determines the moment when the flow rate must be modified.
  • the present invention allows better management of the oil flow, that is to say ultimately a reduction in consumption.
  • This figure shows a set of curves (A, B, C) of the torque C as a function of the temperature T of an element characteristic of the engine temperature, here the temperature of the spark plug seal, for different gasoline / oil mass ratios. lubrication.
  • the lubrication of an engine is therefore directly linked to the tightening problems which appear in the engine as soon as the lubrication is insufficient and a rupture of the oil film occurs. Tightening problems are also linked to the thermal load level of the engine and mainly to the temperature of the piston. The warmer the engine, the greater the risk of tightening (and therefore of engine deterioration). At the same time, the lower the quantity of lubricant introduced (high fuel / lubricant ratio), the more the tightening appears at low temperature.
  • Tightening is characterized by the sudden drop in torque, causing the engine to stop completely and the piston and cylinder to deteriorate.
EP98955711A 1997-11-21 1998-11-20 Durchflusssteurungsverfahren der schmieröl einer zweitakt brennkraftmaschine mit getrennter schmierung Expired - Lifetime EP0958448B1 (de)

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 true EP0958448A1 (de) 1999-11-24
EP0958448B1 EP0958448B1 (de) 2003-09-03

Family

ID=9513737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98955711A Expired - Lifetime EP0958448B1 (de) 1997-11-21 1998-11-20 Durchflusssteurungsverfahren der schmieröl einer zweitakt brennkraftmaschine mit getrennter schmierung

Country Status (10)

Country Link
US (1) US6283072B1 (de)
EP (1) EP0958448B1 (de)
JP (1) JP2001513164A (de)
AR (1) AR017656A1 (de)
BR (1) BR9807109A (de)
DE (1) DE69817767T2 (de)
ES (1) ES2207009T3 (de)
FR (1) FR2771448B1 (de)
TW (1) TW432154B (de)
WO (1) WO1999027236A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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"
WO2017080601A1 (en) * 2015-11-12 2017-05-18 Husqvarna Ab A lubricating system, an engine and method for providing lubricant to an engine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127694A5 (de) * 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
ES2094841T3 (es) * 1991-04-12 1997-02-01 Yamaha Motor Co Ltd Metodo para lubricar un motor de combustion interna de dos tiempos y sistema de suministrar aceite lubricante.
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 (de) * 1992-02-15 1996-10-02 Yamaha Hatsudoki Kabushiki Kaisha Brennkraftmaschine mit einem Schmierungssystem
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9927236A1 *

Also Published As

Publication number Publication date
BR9807109A (pt) 2000-04-25
JP2001513164A (ja) 2001-08-28
WO1999027236A1 (fr) 1999-06-03
EP0958448B1 (de) 2003-09-03
FR2771448A1 (fr) 1999-05-28
DE69817767T2 (de) 2004-03-18
US6283072B1 (en) 2001-09-04
ES2207009T3 (es) 2004-05-16
DE69817767D1 (de) 2003-10-09
FR2771448B1 (fr) 1999-12-31
AR017656A1 (es) 2001-09-12
TW432154B (en) 2001-05-01

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