EP0953735B1 - Verfahren zur Temperaturregelung des Schmiermittels in einer Brennkraftmaschine - Google Patents

Verfahren zur Temperaturregelung des Schmiermittels in einer Brennkraftmaschine Download PDF

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Publication number
EP0953735B1
EP0953735B1 EP19990400993 EP99400993A EP0953735B1 EP 0953735 B1 EP0953735 B1 EP 0953735B1 EP 19990400993 EP19990400993 EP 19990400993 EP 99400993 A EP99400993 A EP 99400993A EP 0953735 B1 EP0953735 B1 EP 0953735B1
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EP
European Patent Office
Prior art keywords
oil
temperature
lubrication
regulating
combustion engine
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
Application number
EP19990400993
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English (en)
French (fr)
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EP0953735A1 (de
Inventor
Gabriel Plassat
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Automobiles Peugeot SA
Automobiles Citroen SA
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Automobiles Peugeot SA
Automobiles Citroen SA
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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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant

Definitions

  • the invention relates to a device for regulating the temperature of the lubricating oil of the mechanical parts an internal combustion engine.
  • the invention applies especially in the automotive field.
  • An internal combustion engine generally includes a cylinder block, cylinder head and oil pan.
  • the oil is sucked into its housing by an oil pump and is distributed in the engine to ensure lubrication of mechanical parts contained in the cylinder block and in the breech.
  • the temperature of the engine lubricating oil constitutes an important parameter making it possible to decrease the friction or passive losses in the motor.
  • So lubricating oil is used for capture the calories from the cylinder head whose temperatures may exceed those of the cylinders or shirts. During normal engine operation, the oil fails calories to the coolant which ensures the thermal oil regulation. This process allows on the one hand the reduction of friction in the engine and on the other hand the use of a low viscosity oil.
  • the lubrication at the top engine is of the "mixed” type, that is to say that the parts mechanical are in metal / metal contact in places and separated by an oil film in other places; while the lubrication is of the "hydrodynamic” type in the low engine, that is, the parts are separated by an oil film.
  • An object of the present invention is to provide a oil temperature regulation process lubrication of the mechanical parts of a internal combustion overcoming all or part of the disadvantages of the prior art noted above.
  • a goal of the present invention is to provide a method of regulation the temperature of the lubricating oil minimizing the friction in the engine compared to the prior art.
  • This object is achieved by the fact that in the process of regulating the temperature of the lubricating oil mechanical parts of an internal combustion engine; the engine comprising a cylinder block, a cylinder head, a casing oil, means for sucking the oil to a first and a second lubrication circuit for mechanical components contained respectively in the cylinder block and in the cylinder head; we regulate the temperatures independently lubricating oil circulating in the first and second lubrication circuits.
  • Another object of the present invention is to provide a oil temperature regulation device lubrication of the mechanical parts of a internal combustion process implementation.
  • the regulatory device the temperature of the lubricating oil of the organs mechanics of an internal combustion engine has first and second temperature regulation means oil respectively from the first lubrication circuit and the second lubrication circuit, means for measuring the oil temperature and control means automatic temperature regulation means of the oil of the first and second lubrication circuits, as a function of the measured oil temperature.
  • first and second regulation means are each switchable by the control means between an inactive state and an active state, the active state the means of regulation being determined for provide either cooling or warming of the oil circulating in the concerned lubrication circuit.
  • the first means of oil regulation are activated to warm the oil circulating in the first circuit of lubrication, the second regulation means being either deactivated or activated to cool the oil circulating in the second lubrication circuit.
  • the reference temperature is between about 80 and 120 degrees.
  • the first means of regulation are deactivated while the second means of regulation are activated to cool the oil circulating in the second lubrication circuit.
  • the first and second regulation means are activated to cool the oil circulating respectively in the first and second lubrication circuits.
  • first and second means for regulating the oil temperature include each an exchanger and associated switching means, the exchangers being located respectively upstream of first and second lubrication circuits, the means of switching allowing to selectively or not select the oil lubrication in heat exchange with the liquid cooling of an engine cooling circuit.
  • switching means heat exchange the coolant and oil from the first lubrication circuit and deactivate heat exchange of coolant with oil of the second lubrication circuit.
  • the switching means set heat exchange the coolant and the oil second lubrication circuit and deactivate the exchange coolant temperature with the first oil lubrication circuit.
  • the switching means exchange heat the first and second coolant and oil lubrication circuits.
  • the limit temperature is between about 140 and 180 degrees.
  • maximum temperature stabilized coolant is a fixed value known by the control means, or a variable value measured in real time.
  • the cooling circuit has two branches in parallel, each of the two tracks of the same bypass comprises a valve constituting the switching means associated with the exchanger concerned.
  • Figure 1 partially and schematically an internal combustion engine which has a cylinder block 1, a cylinder head 2, an oil pan 3 and means 12 oil suction.
  • the suction means 12 can be consist of an oil pump.
  • Oil pump 12 sucks crankcase oil 3 through a strainer 13 to a first circuit 4A of lubrication of the mechanical organs contained in the cylinder housing 1 and to a second lubrication circuit 4B of the mechanical organs contained in the cylinder head 2.
  • the mechanical parts intended to be lubricated in the block cylinder 1 include, for example, the bearings of the crankshaft, the big ends as well as the contacts pistons / shirts.
  • the mechanical parts intended to be lubricated in cylinder head 2 include bearings camshaft as well as the cam / tappet contacts or cam / rocker arm.
  • the first 4A and second 4B lubrication circuits can constitute two parts of a same lubrication circuit. That is, the oil sucked by the pump 12 is shared, at a branch, between the cylinder block 1 and the cylinder head 2.
  • the engine also has a circuit 9 of cooling in which a liquid circulates cooling.
  • circuit 9 of cooling is partially represented so schematic in Figure 1.
  • the oil temperature regulation device lubrication comprises first means 5, 8A, 8B for regulating the temperature of the oil circulating in the first lubrication circuit 4A and second means 6, 7A, 7B for regulating the temperature of the oil circulating in the second lubrication circuit 4B.
  • the regulating device of the lubrication oil temperature also means 10 for measuring the temperature of lubricating oil.
  • These measuring means 10 can be consist of a probe immersed in the oil sump 3 or by any other equivalent means.
  • the device includes also means 11 for automatically controlling the means 6, 7A, 7B; 5, 8A, 8B for temperature regulation of first 4A and second 4B lubrication circuits depending on the oil temperature measured by means 10 of measured.
  • the control means 11 comprise, by example, electronic data processing means of the calculator type or any other equivalent means.
  • the first and second means for regulating the oil temperature each consist of an exchanger 5, 6 associated with means 8A, 8B; 7A, 7B respective switching.
  • These means 7A, 7B; 8A, 8B switching are intended to put or not the coolant in heat exchange with lubricating oil.
  • the exchangers 5, 6 are located upstream respectively first 4A and second 4B lubrication circuits, i.e. upstream of the cylinder block 1 and the cylinder head 2.
  • the switching means associated with each exchanger 5, 6 consist of a pair of valves 8A, 8B; 7A, 7B whether or not to allow coolant circulation in the exchanger 9. That is to say that the circuit 9 of lubrication has two parallel branches allowing whether or not to carry out, in the lubrication circuit 4A, 4B concerned, the heat exchange between the oil and the cooling.
  • Each of the two parallel paths of the same bypass comprises a valve 7A, 7B; 8A, 8B respectively. So when a first 7A, 8A valve from the valve pair 7A, 7B; 8A, 8B is open and the second valve 7B, 8B is closed, the coolant circulates in the exchanger 6, 5 concerned. When the second valve 7B, 8B is open and the first valve 7A, 8A closed, the coolant does not circulate in the exchanger 6, 5 concerned.
  • the control means 11 when the means 10 for measuring the lubricating oil temperature measure a temperature below a reference temperature Tr, the control means 11 put in heat exchange the coolant and oil from the first 4A circuit lubrication, and deactivate the heat exchange of the oil cooling of the second 4B circuit lubrication (figure 2).
  • the reference temperature Tr can be the temperature Stabilized maximum coolant ts in normal engine operation. This temperature Ts maximum stabilized coolant, which is known and / or measured for each type of engine, can be between about 80 and 120 degrees.
  • the liquid of cooling is heat exchanged with the oil in the exchanger 6 of the cylinder head lubrication circuit 4B 2, but not in the exchanger 5 of the lubrication circuit 4A of the cylinder block 1.
  • the temperature of the coolant stabilizes around a temperature, for example, about 90 degrees, while that the temperature of the lubricating oil continues to warm up well beyond 90 degrees.
  • This stabilized maximum temperature Ts of the cooling is either a fixed value known by the means 11 control, a value measured in real time.
  • the regulating device according to the invention includes means for measuring the temperature of the liquid cooling (not shown).
  • control means 11 place the means 7A, 7B; 8A, 8B switching so as to put in heat exchange the coolant and the oil first 4A and second 4B lubrication circuits.
  • the oil intended for circulate in the cylinder block 1 and in the cylinder head 2. This prevents certain mechanical components such as bearing bearings are damaged with oil too hot. Indeed, during this third phase, the coolant temperature is always stabilized around 90 degrees.
  • the device for regulating the temperature of the lubricating oil according to the invention reduced significantly the friction in the engine compared to prior art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (14)

  1. Verfahren zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors, wobei der Motor einen Zylinderblock (1), einen Zylinderkopf (2), eine Ölwanne (3) und eine Einrichtung (12) zum Ansaugen des Öls in einen ersten (4A) und einen zweiten Schmierkreislauf (4B) der mechanischen Organe im Zylindergehäuse (1) beziehungsweise im Zylinderkopf (2) aufweist, dadurch gekennzeichnet, dass es darin besteht, die Temperaturen des im ersten (4A) und zweiten Schmierkreislauf (4B) zirkulierenden Schmieröls unabhängig voneinander zu regeln.
  2. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors, wobei der Motor einen Zylinderblock (1), einen Zylinderkopf (2), eine Ölwanne (3) und eine Einrichtung (12) zum Ansaugen des Öls in einen ersten (4A) und einen zweiten Schmierkreislauf (4B) der mechanischen Organe im Zylindergehäuse (1) beziehungsweise im Zylinderkopf (2) aufweist, die das Verfahren nach Anspruch 1 einsetzt, dadurch gekennzeichnet, dass sie erste (5, 8A, 8B) und zweite Mittel (6, 7A, 7B) zum unabhängigen Regeln der Öltemperaturen des ersten (4A) beziehungsweise des zweiten Schmierkreislaufs (4B), eine Einrichtung (10) zum Messen der Öltemperatur sowie eine Einrichtung (11) zum automatischen Steuern der Mittel (5, 8A, 8B; 6, 7A, 7B) zum Regeln der Öltemperatur des ersten (4A) und zweiten Schmierkreislaufs (4B) abhängig von der gemessenen Öltemperatur aufweist.
  3. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 2, dadurch gekennzeichnet, dass sich die ersten (5, 8A, 8B) und zweiten Mittel (6, 7A, 7B) zum Regeln von der Steuereinrichtung (11) zwischen einem inaktiven und einem aktiven Zustand umschalten lassen, wobei der aktive Zustand der Mittel (5, 8A, 8B, 6, 7A, 7B) zum Regeln entweder zum Kühlen oder zum Erwärmen des im betreffenden Schmierkreislauf (4A, 4B) zirkulierenden Öls dient.
  4. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die ersten Mittel (5) zum Regeln des Öls aktiviert werden, wenn die Öltemperatur niedriger ist als eine Referenztemperatur (Tr), um das im ersten Schmierkreislauf (4A) zirkulierende Öl zu erwärmen, wobei die zweiten Mittel (6) zum Regeln entweder deaktiviert oder aktiviert werden, um das im zweiten Schmierkreislauf (4B) zirkulierende Öl zu kühlen.
  5. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 4, dadurch gekennzeichnet, dass die Referenztemperatur (Tr) zwischen circa 80 und 120 Grad beträgt.
  6. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die ersten Mittel (5) zum Regeln deaktiviert werden, wenn die Temperatur des Schmieröls zwischen der Referenztemperatur (Tr) und einer Grenztemperatur (Tmax) liegt, während die zweiten Mittel (6) zum Regeln aktiviert werden, um das im zweiten Schmierkreislauf (4B) zirkulierende Öl zu kühlen.
  7. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass die ersten (5) und zweiten Mittel (6) zum Regeln aktiviert werden, wenn die Temperatur des Schmieröls eine Grenztemperatur (Tmax) übersteigt, um das im ersten (4A) beziehungsweise zweiten Schmierkreislauf (4B) zirkulierende Öl zu kühlen.
  8. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 2, dadurch gekennzeichnet, dass die ersten und zweiten Mittel zum Regeln der Öltemperatur jeweils einen Tauscher (5, 6) und zugehörige Schaltmittel (7A, 7B; 8A, 8B) aufweisen, wobei die Tauscher (5, 6) vor dem ersten (4A) beziehungsweise zweiten Schmierkreislauf (4B) angeordnet sind und die Schaltmittel (7A, 7B; 8A, 8B) es erlauben, das Schmieröl wahlweise in Wärmeaustausch mit der Kühlflüssigkeit eines Kühlkreislaufs (9) des Motors zu bringen oder nicht.
  9. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 8, dadurch gekennzeichnet, dass die Schaltmittel (7A, 7B; 8A, 8B) die Kühlflüssigkeit und das Öl des ersten Schmierkreislaufs (4A) in Wärmeaustausch bringen und den Wärmeaustausch der Kühlflüssigkeit mit dem Öl des zweiten Schmierkreislaufs (4B) deaktivieren, wenn die Temperatur des Schmieröls bei normalem Betrieb des Motors unter der stabilisierten Maximaltemperatur (Ts) der Kühlflüssigkeit liegt.
  10. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 9, dadurch gekennzeichnet, dass die Schaltmittel (7A, 7B; 8A, 8B) die Kühlflüssigkeit und das Öl des zweiten Schmierkreislaufs (4B) in Wärmeaustausch bringen und den Wärmeaustausch der Kühlflüssigkeit mit dem Öl des ersten Schmierkreislaufs (4A) deaktivieren, wenn die Temperatur des Schmieröls zwischen der stabilisierten Maximaltemperatur (Ts) der Kühlflüssigkeit und einer Grenztemperatur (Tmax) liegt.
  11. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach Anspruch 10, dadurch gekennzeichnet, dass die Schaltmittel (7A, 7B; 8A, 8B) die Kühlflüssigkeit und das Öl des ersten (4A) und zweiten Schmierkreislaufs (4B) in Wärmeaustausch bringen, wenn die Temperatur des Schmieröls höher ist als eine Grenztemperatur (Tmax).
  12. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach einem der Ansprüche 6, 7, 10 oder 11, dadurch gekennzeichnet, dass die Grenztemperatur (Tmax) zwischen circa 140 und 180 Grad beträgt.
  13. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die stabilisierte Maximaltemperatur (Ts) der Kühlflüssigkeit ein fester, der Steuereinrichtung (11) bekannter Wert oder ein variabler, in Echtzeit gemessener Wert ist.
  14. Vorrichtung zum Regeln der Temperatur des Schmieröls für die mechanischen Organe eines Verbrennungsmotors nach einem der Ansprüche 8, 9, 10, 11 oder 13, dadurch gekennzeichnet, dass der Kühlkreislauf (9) zwei parallele Abzweigungen aufweist, wobei jeder der beiden Wege einer Abzweigung ein Ventil (7A, 7B, 8A, 8B) aufweist, welches das zum betreffenden Tauscher (5, 6) gehörige Schaltmittel bildet.
EP19990400993 1998-04-30 1999-04-23 Verfahren zur Temperaturregelung des Schmiermittels in einer Brennkraftmaschine Expired - Lifetime EP0953735B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9805462A FR2778204B1 (fr) 1998-04-30 1998-04-30 Procede de regulation de la temperature de l'huile de lubrification des organes mecaniques d'un moteur a combustion interne
FR9805462 1998-04-30

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EP0953735A1 EP0953735A1 (de) 1999-11-03
EP0953735B1 true EP0953735B1 (de) 2003-05-21

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DE (1) DE69908018T2 (de)
FR (1) FR2778204B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019086B4 (de) * 2006-04-23 2020-03-26 Att Automotivethermotech Gmbh Verfahren und Vorrichtung zur aktiven Öltemperierung bei Kraftfahrzeugen mit Verbrennungskraftmaschinen
DE102008018322A1 (de) * 2008-04-11 2009-10-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren und Vorrichtung zur Steuerung eines Verbrennungsmotors

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128899A5 (de) * 1971-03-08 1972-10-27 Semt
US4248293A (en) * 1979-01-16 1981-02-03 Honda Giken Kogyo Kabushiki Kaisha Apparatus for cooling engine oil
DE2965996D1 (en) * 1979-09-28 1983-09-01 Caterpillar Tractor Co Fluid sequence bypass apparatus
US4512300A (en) * 1984-04-17 1985-04-23 Cummins Engine Company, Inc. Oil temperature control system for internal combustion engine
FR2605677B1 (fr) * 1986-10-24 1990-09-14 Renault Dispositif de graissage pour moteur a combustion interne
DE3843827A1 (de) * 1988-12-24 1990-07-05 Kloeckner Humboldt Deutz Ag Brennkraftmaschine mit zwei hydraulischen fluessigkeitskreislaeufen
JPH04111505U (ja) * 1991-03-15 1992-09-28 本田技研工業株式会社 内燃機関における給油装置
DE4325141A1 (de) * 1993-07-27 1995-02-02 Kloeckner Humboldt Deutz Ag Brennkraftmaschine
EP0775813B1 (de) * 1995-11-24 2003-03-05 Yamaha Hatsudoki Kabushiki Kaisha Brennkraftmaschine

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Publication number Publication date
DE69908018D1 (de) 2003-06-26
EP0953735A1 (de) 1999-11-03
FR2778204B1 (fr) 2000-06-16
DE69908018T2 (de) 2004-04-01
FR2778204A1 (fr) 1999-11-05

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