EP3314100B1 - Oil supply system for an internal combustion engine - Google Patents

Oil supply system for an internal combustion engine Download PDF

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Publication number
EP3314100B1
EP3314100B1 EP16740930.9A EP16740930A EP3314100B1 EP 3314100 B1 EP3314100 B1 EP 3314100B1 EP 16740930 A EP16740930 A EP 16740930A EP 3314100 B1 EP3314100 B1 EP 3314100B1
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EP
European Patent Office
Prior art keywords
oil
line
internal combustion
combustion engine
supply system
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EP16740930.9A
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German (de)
French (fr)
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EP3314100A1 (en
Inventor
Michael FÖRSTER
Alfred RANGGER
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Innio Jenbacher GmbH and Co OG
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Innio Jenbacher GmbH and Co OG
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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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • F01M11/061—Means for keeping lubricant level constant
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0458—Lubricant filling and draining
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M2011/0095—Supplementary oil tank
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0458—Lubricant filling and draining
    • F01M2011/0466—Filling or draining during running

Definitions

  • the invention relates to an oil supply system for an internal combustion engine having the features of the preamble of claim 1.
  • oil is pumped from an internal oil pan of the internal combustion engine by an oil pump to the consumers in pressure lubrication and returns to the internal oil pan of the internal combustion engine under the influence of gravity. It is also known to increase the service life of the oil by increasing the volume of oil involved in the circuit.
  • the internal oil pan of the internal combustion engine is connected to an additional oil reservoir, for example in the form of oil tanks.
  • JPH02204609 A discloses such an oil supply system according to the preamble of claim 1.
  • the object of the present invention is therefore to specify an oil supply system with which the dwell time of the oil in the additional oil reservoir is extended.
  • an extraction opening of the return line is arranged near the ground or in the bottom of the at least one oil tank, a better mixing of the oil in the additional oil tank and a longer residence time in the additional oil tank given before a withdrawal. This ensures that unused (fresh) oil is removed via the return line.
  • a ventilation line is provided which connects the oil reservoir to the return line, in which gases dissolved in the oil are introduced into a crankcase of the internal combustion engine together with returned oil via the return line.
  • This measure makes it possible to discharge the gases dissolved in the oil coming from the internal combustion engine from the oil tank. This measure is important, as otherwise the pressure in the oil tank may increase and the oil tank may partially empty into the oil pan.
  • Venting can now take place in such a way that a vent line near the cover of the oil tank is connected to a return line.
  • the gases are introduced into a crankcase of the internal combustion engine together with the returned oil for the return line.
  • the return line is preferably connected to a removal line which extends close to the bottom of the at least one oil tank, the removal line having a removal opening close to the bottom of the at least one oil tank.
  • At least one flow guide device is provided in the at least one oil tank. This measure further improves the flow in the oil tank.
  • the flow guide device can be designed, for example, in the form of guide plates.
  • a preferably spring-loaded check valve is installed in the feed line between the internal combustion engine and the oil reservoir.
  • a check valve prevents oil from oil lines of the internal combustion engine or oil from the oil pan from being emptied into the oil reservoir when the internal combustion engine is at a standstill.
  • the internal combustion engine and the external oil reservoir arranged outside the internal combustion engine are set up on the same structural level.
  • the measure is implemented that the removal opening of the connecting line is close to the bottom of the oil tank located upstream.
  • the return line to the internal combustion engine is then connected to the at least second oil tank.
  • the return line is connected to the at least one oil tank.
  • the invention is particularly suitable for stationary internal combustion engines, in particular internal combustion engines coupled to a generator to form a genset.
  • the invention is particularly suitable for applications in internal combustion engines with high oil wear, such as in performance-enhanced engines with an unchanged oil volume, in biogas or landfill gas applications or engines with small internal oil pans due to their design.
  • the invention has proven to be particularly advantageous in connection with the use of steel pistons.
  • FIG. 1 shows an embodiment of an oil supply system according to the invention.
  • An internal combustion engine 1 with an internal oil pan 2 can be seen.
  • pressure lubrication 10 includes oil pan 2, an oil pump 11, a main oil line 14 and an oil filter 12. Oil O is routed via main oil line 14 to consumers 13 in internal combustion engine 1.
  • a supply line 4 branches off from the main oil line 14 upstream of the oil filter 12 and leads a partial flow of oil O into an external oil reservoir 3, formed here by two oil tanks 7 arranged in series.
  • the oil reservoir 3 can also be formed by just a single oil tank 7 .
  • the oil level of oil O in the two oil tanks 7 is indicated by the shaded area.
  • the oil level preferably reaches the cover of the oil tank 7.
  • the oil O is fed back to the internal combustion engine 1 via a return line 6 from the second oil tank 7 located downstream of the first oil tank 7 .
  • the supply line 4 leads to the first of the two oil tanks 7 arranged in series and ends in a filling opening 5 near the bottom of the oil tank 7.
  • a flow guide device 15 here in the form of a guide plate, can be provided in order to further improve the flow through the oil tank 7.
  • a connecting line 19 between the oil tanks 7.
  • a first extraction line 9 leads via the connecting line 19 into the oil tank 7 located downstream.
  • the extraction opening 8 of the extraction line 9, which opens into the connecting line 19 is arranged near the bottom of the oil tank 7 .
  • connection line 19 is omitted and the extraction line 9 is connected directly to the return line 6 .
  • the extraction opening 8 of the extraction line 9 is arranged near the bottom of the oil tank or tanks 7 .
  • the removal opening 8 is designed as an opening in the bottom of the oil tank 7 and opens into the return line 6 there.
  • the arrangement of the removal opening 8 near the bottom of the oil tank 7 thus ensures good mixing of the oil O in the oil tank 7 on the one hand and ensures on the other hand that hot oil that has just come from the internal combustion engine 1 is removed and returned to the internal combustion engine 1.
  • the gas G dissolved in the oil O separates from the oil O in the oil tank 7 and rises to the surface. So that the pressure in the oil tank 7 does not rise, a ventilation line 16 is provided, which directs the gas G to the return line 6 . In this way, it gets back into a crankcase 20 of the internal combustion engine 1.
  • the removal line 9 has a ventilation bore 17, via which gas G can be fed into the return line 6 (or, if there are several oil tanks, first into the connecting line 19). can step.
  • the return line 6 opens into the crankcase 20 of the internal combustion engine 1, preferably above the oil level of the oil O in the oil pan 2.
  • the internal combustion engine 1 and the external oil reservoir 3 arranged outside the internal combustion engine 1 are set up on the same structural level. It may be that when setting up Internal combustion engine 1 and oil reservoir 3 results in an elevation of the oil pan 2 compared to a reference level in the oil tank 7 . This can lead to oil O leaking out of oil lines in the internal combustion engine 1 or oil O out of the oil pan 2 into the oil tank 7 . Leaking of oil lines when the internal combustion engine 1 is at a standstill, for example lines between the main oil line 14 and consumers 13, is particularly unfavorable because this significantly lengthens a pre-lubrication process before the internal combustion engine 1 is started. In a pre-lubrication process, oil O is brought to consumers 13 before the internal combustion engine 1 is started.
  • the pre-lubrication is usually taken over by a pre-lubrication pump 21, which is designed significantly below the oil pump 11 in terms of performance and bridges this during the pre-lubrication process.
  • the pre-lubrication pump 21 produces an oil pressure of 0.8 bar, for example.
  • a preferably spring-loaded non-return valve 18 prevents oil O from being emptied from the oil lines and the oil pan 2 into the oil reservoir 3 when the internal combustion engine 1 is at a standstill.
  • a further particular advantage of a spring-loaded check valve 18 is that it remains closed during the pre-lubrication process and therefore the oil O only has to be pumped through the internal combustion engine 1 and not through the entire oil reservoir 3 during the pre-lubrication process.
  • the external oil reservoir 3 is supplied with oil O via the supply line 4 via the main oil line 14. Upstream of the oil filter 12 with a pressure of 3 to 10 bar, with a cross-sectional narrowing of the supply line 4 compared to the main oil line 14 to a cross-section of 2.5 mm an oil flow of 6 l/min at an oil pressure of 4.2 bar at the extraction point in the supply line 4.
  • the circulation capacity of the oil pump 11 is 480 l/min.
  • the temperature of the oil O emerging from the oil pan 2 is approximately 70°C.
  • the pre-lubrication pump 21 produces an oil pressure of 0.8 bar, for example.
  • the opening pressure of the check valve 18 is designed to be 1 bar, for example. The pressure of the pre-lubrication pump 21 is then below the opening pressure of the check valve 18.
  • the oil reservoir 3 has approximately the same oil volume as the oil pan 2 .
  • the oil volume involved in the oil circuit is thus doubled by the oil reservoir 3 .

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

Description

Die Erfindung betrifft ein Ölversorgungssystem für eine Brennkraftmaschine mit den Merkmalen des Oberbegriffs von Anspruch 1.The invention relates to an oil supply system for an internal combustion engine having the features of the preamble of claim 1.

Bei aus dem Stand der Technik bekannten Ölversorgungssystemen für Brennkraftmaschinen wird in einer Druckumlaufschmierung Öl aus einer internen Ölwanne der Brennkraftmaschine durch eine Ölpumpe zu den Verbrauchern gepumpt und gelangt unter dem Einfluss der Schwerkraft wieder zurück in die interne Ölwanne der Brennkraftmaschine. Weiters ist es bekannt, eine Ölstandzeit durch eine Vergrößerung des am Kreislauf beteiligten Ölvolumens zu erhöhen. Dazu wird beispielsweise die interne Ölwanne der Brennkraftmaschine mit einem zusätzlichen Ölreservoir, beispielsweise in Form von Öltanks verbunden. Die JPH02204609 A offenbart solch ein Ölversorgungssystem nach dem Obenbegriff des Anspruchs 1.In oil supply systems for internal combustion engines known from the prior art, oil is pumped from an internal oil pan of the internal combustion engine by an oil pump to the consumers in pressure lubrication and returns to the internal oil pan of the internal combustion engine under the influence of gravity. It is also known to increase the service life of the oil by increasing the volume of oil involved in the circuit. For this purpose, for example, the internal oil pan of the internal combustion engine is connected to an additional oil reservoir, for example in the form of oil tanks. JPH02204609 A discloses such an oil supply system according to the preamble of claim 1.

Es hat sich im Betrieb von verfügbaren Ölversorgungssystemen mit zusätzlichen Öltanks allerdings herausgestellt, dass über Entnahmeleitungen aus zusätzlichen Öltanks entnommenes Öl häufig nur eine kurze Verweildauer im zusätzlichen Öltank vor einer Entnahme erfahren hat. GeändetrteIn the operation of available oil supply systems with additional oil tanks, however, it has turned out that oil taken from additional oil tanks via extraction lines has often experienced only a short dwell time in the additional oil tank before extraction. changed

Aufgabe der vorliegenden Erfindung ist es daher, ein Ölversorgungssystem anzugeben, mit welchen die Verweildauer des Öls im zusätzlichen Ölreservoir verlängert wird.The object of the present invention is therefore to specify an oil supply system with which the dwell time of the oil in the additional oil reservoir is extended.

Gelöst wird diese Aufgabe durch ein Ölversorgungssystem mit den Merkmalen von Anspruch 1. Vorteilhafte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.This object is solved by an oil supply system having the features of claim 1. Advantageous embodiments are specified in the dependent claims.

Indem eine Entnahmeöffnung der Rückführleitung in Bodennähe oder im Boden des wenigstens einen Öltanks angeordnet ist, ist eine bessere Durchmischung des Öls im zusätzlichen Öltank und eine verlängerte Verweildauer im zusätzlichen Öltank vor einer Entnahme gegeben. So wird gewährleistet, dass über die Rückführleitung unverbrauchtes (frisches) Öl entnommen wird.By an extraction opening of the return line is arranged near the ground or in the bottom of the at least one oil tank, a better mixing of the oil in the additional oil tank and a longer residence time in the additional oil tank given before a withdrawal. This ensures that unused (fresh) oil is removed via the return line.

Weiters ist vorgesehen, dass eine Entlüftungsleitung vorgesehen ist, die das Ölreservoir mit der Rückführleitung verbindet, bei welcher im Öl gelöste Gase zusammen mit rückgeführtem Öl über die Rückführleitung in ein Kurbelgehäuse der Brennkraftmaschine eingebracht werden.Furthermore, it is provided that a ventilation line is provided which connects the oil reservoir to the return line, in which gases dissolved in the oil are introduced into a crankcase of the internal combustion engine together with returned oil via the return line.

Durch diese Maßnahme wird die Möglichkeit geschaffen, die in dem von der Brennkraftmaschine stammenden Öl gelösten Gase aus dem Öltank abzuführen. Diese Maßnahme ist wichtig, da es sonst zu einem Ansteigen des Drucks im Öltank und dadurch zu einer teilweisen Entleerung des Öltanks in die Ölwanne kommen kann.This measure makes it possible to discharge the gases dissolved in the oil coming from the internal combustion engine from the oil tank. This measure is important, as otherwise the pressure in the oil tank may increase and the oil tank may partially empty into the oil pan.

Die Entlüftung kann nun so erfolgen, dass eine Entlüftungsleitung in Deckelnähe des Öltanks mit einer Rückführleitung verbunden ist. In diesem Fall werden die Gase zusammen mit dem rückgeführten Öl für die Rückführleitung in ein Kurbelgehäuse der Brennkraftmaschine eingebracht.Venting can now take place in such a way that a vent line near the cover of the oil tank is connected to a return line. In this case, the gases are introduced into a crankcase of the internal combustion engine together with the returned oil for the return line.

Bevorzugt ist vorgesehen, dass die Rückführleitung mit einer bis in Bodennähe des wenigstens einen Öltanks ragenden Entnahmeleitung verbunden ist, wobei die Entnahmeleitung eine Entnahmeöffnung in Bodennähe des wenigstens einen Öltanks aufweist. Dies beschreibt den Fall, dass die Entnahme von Öl aus dem Öltank durch eine eigene, in den Öltank ragende Entnahmeleitung erfolgt. Alternativ kann vorgesehen sein, dass die Entnahme durch eine Öffnung im Boden des Öltanks erfolgt. Wegen der Ansammlung von Ablagerungen am Boden des Öltanks ist allerdings eine Entnahme über eine bis in Bodennähe des wenigstens einen Öltanks ragende Entnahmeleitung vorzuziehen.Provision is preferably made for the return line to be connected to a removal line which extends close to the bottom of the at least one oil tank, the removal line having a removal opening close to the bottom of the at least one oil tank. This describes the situation in which oil is removed from the oil tank through a separate removal line that projects into the oil tank. Alternatively it can be provided that the removal takes place through an opening in the bottom of the oil tank. Because of the accumulation of deposits on the bottom of the oil tank, however, removal via a removal line that projects to near the bottom of the at least one oil tank is preferable.

Bevorzugt ist vorgesehen, dass die Zufuhrleitung in Bodennähe des wenigstens einen Öltanks mündet. Diese Maßnahme bewirkt eine günstige Durchströmung und Durchmischung des Öltanks, da das von der Brennkraftmaschine stammende Öl mit hoher Temperatur und mit Gas beladen eintritt. Dadurch hat es die Tendenz, im Öltank aufzusteigen. Bei einer Mündung der Zufuhrleitung in Bodennähe des wenigstens einen Öltanks bewirkt das aufsteigende Öl eine Umwälzung des Ölvolumens im Öltank.Provision is preferably made for the supply line to open out near the bottom of the at least one oil tank. This measure causes a favorable flow and mixing of the oil tank, since that of the internal combustion engine originating oil enters at high temperature and laden with gas. As a result, it has a tendency to rise in the oil tank. When the supply line opens out near the bottom of the at least one oil tank, the rising oil causes the oil volume in the oil tank to circulate.

Es kann vorgesehen sein, dass im wenigstens einen Öltank wenigstens eine Strömungsleiteinrichtung vorgesehen ist. Durch diese Maßnahme wird die Durchströmung im Öltank weiter verbessert. Die Strömungsleiteinrichtung kann beispielsweise in Form von Leitblechen ausgebildet sein.It can be provided that at least one flow guide device is provided in the at least one oil tank. This measure further improves the flow in the oil tank. The flow guide device can be designed, for example, in the form of guide plates.

Es kann vorgesehen sein, dass die Entnahmeleitung in Deckelnähe des Öltanks wenigstens eine Entlüftungsbohrung aufweist. Durch diese zusätzliche oder alternative Maßnahme zur Entlüftung ist gewährleistet, dass sich keine Gase im Öltank sammeln, sondern über die Entnahmeleitung aus dem Öltank abgeführt werden.Provision can be made for the removal line to have at least one ventilation hole near the cover of the oil tank. This additional or alternative venting measure ensures that no gases collect in the oil tank but are discharged from the oil tank via the extraction line.

Bevorzugt ist vorgesehen, dass ein vorzugsweise federbelastetes Rückschlagventil in der Zuführleitung zwischen Brennkraftmaschine und dem Ölreservoir eingebaut ist.It is preferably provided that a preferably spring-loaded check valve is installed in the feed line between the internal combustion engine and the oil reservoir.

Durch ein Rückschlagventil wird verhindert, dass sich bei Stillstand der Brennkraftmaschine Öl aus Ölleitungen der Brennkraftmaschine oder Öl aus der Ölwanne in das Ölreservoir entleert. In der Regel werden die Brennkraftmaschine und das außerhalb der Brennkraftmaschine angeordnete externe Ölreservoir auf dem gleichen baulichen Niveau aufgestellt.A check valve prevents oil from oil lines of the internal combustion engine or oil from the oil pan from being emptied into the oil reservoir when the internal combustion engine is at a standstill. As a rule, the internal combustion engine and the external oil reservoir arranged outside the internal combustion engine are set up on the same structural level.

Es kann vorgesehen sein, dass wenigstens zwei seriell angeordnete Öltanks vorhanden sind, wobei in einen ersten Öltank die Zuführleitung mündet und die wenigstens zwei Öltanks über Verbindungsleitungen verbunden sind. Dies beschreibt den Fall, in dem das externe Ölreservoir in Form mehrerer, seriell angeordneter Öltanks realisiert ist. Auch bei der Verbindungsleitung zwischen einzelnen Öltanks ist die Maßnahme realisiert, dass die Entnahmeöffnung der Verbindungsleitung in Bodennähe des stromaufwärts gelegenen Öltanks liegt. Die Rückführleitung zur Brennkraftmaschine ist dann mit dem wenigstens zweiten Öltank verbunden.Provision can be made for at least two serially arranged oil tanks to be present, with the supply line opening into a first oil tank and the at least two oil tanks being connected via connecting lines. This describes the case in which the external oil reservoir is realized in the form of several oil tanks arranged in series. Even with the connecting line between individual oil tanks, the measure is implemented that the removal opening of the connecting line is close to the bottom of the oil tank located upstream. The return line to the internal combustion engine is then connected to the at least second oil tank.

Ist nur ein Öltank vorgesehen, ist die Rückführleitung mit dem wenigstens einen Öltank verbunden.If only one oil tank is provided, the return line is connected to the at least one oil tank.

Die Erfindung ist besonders geeignet für stationäre Brennkraftmaschinen, insbesondere mit einem Generator zu einem Genset gekoppelte Brennkraftmaschinen.The invention is particularly suitable for stationary internal combustion engines, in particular internal combustion engines coupled to a generator to form a genset.

Besonders eignet sich die Erfindung für Anwendungen von Brennkraftmaschinen mit hohem Ölverschleiß, wie beispielsweise bei leistungsgesteigerten Motoren mit unverändertem Ölvolumen, bei Biogas- oder Deponiegasanwendungen oder Motoren mit konstruktionsbedingt kleinen internen Ölwannen.The invention is particularly suitable for applications in internal combustion engines with high oil wear, such as in performance-enhanced engines with an unchanged oil volume, in biogas or landfill gas applications or engines with small internal oil pans due to their design.

Die Erfindung hat sich als besonders günstig im Zusammenhang mit der Verwendung von Stahlkolben erwiesen.The invention has proven to be particularly advantageous in connection with the use of steel pistons.

Die Erfindung wird anhand der Figur näher erläutert.The invention is explained in more detail with reference to the figure.

Fig. 1 zeigt ein Ausführungsbeispiel eines erfindungsgemäßen Ölversorgungssystems. Zu erkennen ist eine Brennkraftmaschine 1 mit einer internen Ölwanne 2. Das gezeigte Ölversorgungssystem weist eine Druckumlaufschmierung 10 auf. 1 shows an embodiment of an oil supply system according to the invention. An internal combustion engine 1 with an internal oil pan 2 can be seen.

Die Druckumlaufschmierung 10 umfasst in dieser vereinfachten Darstellung die Ölwanne 2, eine Ölpumpe 11, eine Hauptölleitung 14 und einen Ölfilter 12. Das Öl O wird über die Hauptölleitung 14 zu Verbrauchern 13 in der Brennkraftmaschine 1 geleitet.In this simplified representation, pressure lubrication 10 includes oil pan 2, an oil pump 11, a main oil line 14 and an oil filter 12. Oil O is routed via main oil line 14 to consumers 13 in internal combustion engine 1.

Im gezeigten Ausführungsbeispiel zweigt eine Zufuhrleitung 4 stromaufwärts des Ölfilters 12 von der Hauptölleitung 14 ab und führt einen Teilstrom von Öl O in ein externes Ölreservoir 3, hier durch zwei seriell angeordnete Öltanks 7 ausgebildet.In the exemplary embodiment shown, a supply line 4 branches off from the main oil line 14 upstream of the oil filter 12 and leads a partial flow of oil O into an external oil reservoir 3, formed here by two oil tanks 7 arranged in series.

Das Ölreservoir 3 kann natürlich auch nur von einem einzigen Öltank 7 gebildet sein. Der Ölstand von Öl O in den zwei Öltanks 7 ist durch die schraffierte Fläche angedeutet. Vorzugsweise reicht der Ölstand bis an den Deckel des Öltanks 7.Of course, the oil reservoir 3 can also be formed by just a single oil tank 7 . The oil level of oil O in the two oil tanks 7 is indicated by the shaded area. The oil level preferably reaches the cover of the oil tank 7.

Aus dem stromabwärts des ersten Öltanks 7 gelegenen zweiten Öltank 7 wird über eine Rückführleitung 6 das Öl O wieder der Brennkraftmaschine 1 zugeführt.The oil O is fed back to the internal combustion engine 1 via a return line 6 from the second oil tank 7 located downstream of the first oil tank 7 .

Im gezeigten Ausführungsbeispiel führt die Zufuhrleitung 4 zum ersten der zwei in Serie angeordneten Öltanks 7 und mündet in einer Einfüllöffnung 5 in Bodennähe des Öltanks 7.In the exemplary embodiment shown, the supply line 4 leads to the first of the two oil tanks 7 arranged in series and ends in a filling opening 5 near the bottom of the oil tank 7.

Eine Strömungsleiteinrichtung 15, hier in Form eines Leitblechs, kann vorgesehen sein, um die Durchströmung des Öltanks 7 weiter zu verbessern.A flow guide device 15, here in the form of a guide plate, can be provided in order to further improve the flow through the oil tank 7.

Im gezeigten Ausführungsbeispiel von zwei in Serie geschalteten Öltanks 7 besteht zwischen den Öltanks 7 eine Verbindungsleitung 19. Eine erste Entnahmeleitung 9 führt in diesem Fall also über die Verbindungsleitung 19 in den stromabwärts gelegenen Öltank 7. Die Entnahmeöffnung 8 der in die Verbindungsleitung 19 mündenden Entnahmeleitung 9 ist in Bodennähe des Öltanks 7 angeordnet.In the illustrated embodiment of two oil tanks 7 connected in series, there is a connecting line 19 between the oil tanks 7. In this case, a first extraction line 9 leads via the connecting line 19 into the oil tank 7 located downstream. The extraction opening 8 of the extraction line 9, which opens into the connecting line 19 is arranged near the bottom of the oil tank 7 .

Ist nur ein Öltank 7 vorgesehen, entfällt die Verbindungsleitung 19 und die Entnahmeleitung 9 ist direkt mit der Rückführleitung 6 verbunden.If only one oil tank 7 is provided, the connection line 19 is omitted and the extraction line 9 is connected directly to the return line 6 .

Die Entnahmeöffnung 8 der Entnahmeleitung 9 ist in Bodennähe des bzw. der Öltanks 7 angeordnet.The extraction opening 8 of the extraction line 9 is arranged near the bottom of the oil tank or tanks 7 .

Dies bewirkt eine günstige Durchmischung des Öls O im zusätzlichen Öltank 7 (bzw. den zusätzlichen Öltanks7) und eine verlängerte Verweildauer des Öls O im zusätzlichen Öltank 7 vor der Wieder-Entnahme und Rückführung in die Brennkraftmaschine 1. Somit wird über die Entnahmeöffnung 8 stets frisches Öl O aus dem Öltank 7 bzw. den Öltanks 7 entnommen.This causes a favorable mixing of the oil O in the additional oil tank 7 (or the additional oil tanks 7) and a longer dwell time of the oil O in the additional oil tank 7 before it is removed again and returned to the internal combustion engine 1 Oil O taken from the oil tank 7 and the oil tanks 7 respectively.

Hier nicht gezeigt, aber ebenfalls vorstellbar ist es, dass Entnahmeöffnung 8 als Öffnung im Boden des Öltanks 7 ausgebildet ist dort in die Rückführleitung 6 mündet.Not shown here, but it is also conceivable that the removal opening 8 is designed as an opening in the bottom of the oil tank 7 and opens into the return line 6 there.

Das Öl O tritt aus der Brennkraftmaschine 1 gasbeladen und mit erhöhter Temperatur über die Zufuhrleitung 4 und die Einfüllöffnung 5 in den Öltank 7 ein. Das heiße Öl O steigt im Öltank 7 an die Oberfläche. Durch die Anordnung der Entnahmeöffnung 8 in Bodennähe des Öltanks 7 ist also einerseits eine gute Durchmischung des Öls O im Öltank 7 gewährleistet und andererseits sichergestellt, dass nicht heißes, eben aus der Brennkraftmaschine 1 stammendes Öl entnommen und der Brennkraftmaschine 1 rückgeführt wird.The oil O exits the internal combustion engine 1 gas-laden and at an elevated temperature via the supply line 4 and the filling opening 5 into the oil tank 7 . The hot oil O rises in the oil tank 7 to the surface. The arrangement of the removal opening 8 near the bottom of the oil tank 7 thus ensures good mixing of the oil O in the oil tank 7 on the one hand and ensures on the other hand that hot oil that has just come from the internal combustion engine 1 is removed and returned to the internal combustion engine 1.

Das im Öl O gelöste Gas G entmischt sich im Öltank 7 vom Öl O und steigt zur Oberfläche. Damit der Druck im Öltank 7 nicht ansteigt, ist eine Entlüftungsleitung 16 vorgesehen, welche das Gas G zur Rückführleitung 6 leitet. Auf diese Weise gelangt es wieder in ein Kurbelgehäuse 20 der Brennkraftmaschine 1. Alternativ oder zusätzlich kann vorgesehen sein, dass die Entnahmeleitung 9 eine Entlüftungsbohrung 17 aufweist, über welche Gas G in die Rückführleitung 6 (bzw. bei mehreren Öltanks zunächst in die Verbindungsleitung 19) treten kann.The gas G dissolved in the oil O separates from the oil O in the oil tank 7 and rises to the surface. So that the pressure in the oil tank 7 does not rise, a ventilation line 16 is provided, which directs the gas G to the return line 6 . In this way, it gets back into a crankcase 20 of the internal combustion engine 1. Alternatively or additionally, it can be provided that the removal line 9 has a ventilation bore 17, via which gas G can be fed into the return line 6 (or, if there are several oil tanks, first into the connecting line 19). can step.

Die Rückführleitung 6 mündet in das Kurbelgehäuse 20 der Brennkraftmaschine 1, vorzugsweise oberhalb des Ölspiegels des Öls O in der Ölwanne 2.The return line 6 opens into the crankcase 20 of the internal combustion engine 1, preferably above the oil level of the oil O in the oil pan 2.

In der Regel werden die Brennkraftmaschine 1 und das außerhalb der Brennkraftmaschine 1 angeordnete externe Ölreservoir 3 auf dem gleichen baulichen Niveau aufgestellt. Es kann sein, dass sich bei der Aufstellung von Brennkraftmaschine 1 und Ölreservoir 3 eine Überhöhung der Ölwanne 2 gegenüber einer Referenzebene im Öltank 7 ergibt. Dies kann zu einem Auslaufen von Öl O aus Ölleitungen in der Brennkraftmaschine 1 oder Öl O aus der Ölwanne 2 in den Öltank 7 führen. Ein Auslaufen von Ölleitungen bei einem Stillstand der Brennkraftmaschine 1, beispielsweise von Leitungen zwischen der Hauptölleitung 14 und Verbrauchern 13, ist besonders ungünstig, weil dadurch ein Vorschmiervorgang vor einem Starten der Brennkraftmaschine 1 deutlich verlängert wird. In einem Vorschmiervorgang wird Öl O vor einem Starten der Brennkraftmaschine 1 an Verbraucher 13 gebracht. Die Vorschmierung wird üblicherweise von einer Vorschmierpumpe 21 übernommen, die leistungsmäßig deutlich unter der Ölpumpe 11 ausgelegt ist und diese während des Vorschmiervorganges überbrückt. Die Vorschmierpumpe 21 erbringt beispielsweise 0,8 bar Öldruck.As a rule, the internal combustion engine 1 and the external oil reservoir 3 arranged outside the internal combustion engine 1 are set up on the same structural level. It may be that when setting up Internal combustion engine 1 and oil reservoir 3 results in an elevation of the oil pan 2 compared to a reference level in the oil tank 7 . This can lead to oil O leaking out of oil lines in the internal combustion engine 1 or oil O out of the oil pan 2 into the oil tank 7 . Leaking of oil lines when the internal combustion engine 1 is at a standstill, for example lines between the main oil line 14 and consumers 13, is particularly unfavorable because this significantly lengthens a pre-lubrication process before the internal combustion engine 1 is started. In a pre-lubrication process, oil O is brought to consumers 13 before the internal combustion engine 1 is started. The pre-lubrication is usually taken over by a pre-lubrication pump 21, which is designed significantly below the oil pump 11 in terms of performance and bridges this during the pre-lubrication process. The pre-lubrication pump 21 produces an oil pressure of 0.8 bar, for example.

Ein vorzugsweise federbelastetes Rückschlagventil 18 verhindert, dass sich bei Stillstand der Brennkraftmaschine 1 Öl O aus Ölleitungen und der Ölwanne 2 in das Ölreservoir 3 entleert. Ein weiterer besonderer Vorteil eines federbelasteten Rückschlagventils 18 liegt darin, dass es während des Vorschmiervorganges geschlossen bleibt und somit das Öl O während des Vorschmiervorganges nur durch die Brennkraftmaschine 1 und nicht durch das gesamte Ölreservoir 3 gepumpt werden muss.A preferably spring-loaded non-return valve 18 prevents oil O from being emptied from the oil lines and the oil pan 2 into the oil reservoir 3 when the internal combustion engine 1 is at a standstill. A further particular advantage of a spring-loaded check valve 18 is that it remains closed during the pre-lubrication process and therefore the oil O only has to be pumped through the internal combustion engine 1 and not through the entire oil reservoir 3 during the pre-lubrication process.

Die Verhältnisse sollen anhand eines Zahlenbeispiels illustriert werden:
Die Versorgung des externen Ölreservoirs 3 über die Zufuhrleitung 4 mit Öl O erfolgt über die Hauptölleitung 14. Stromaufwärts vom Ölfilter 12 mit einem Druck von 3 bis 10 bar, wobei eine Querschnittsverjüngung der Zufuhrleitung 4 gegenüber der Hauptölleitung 14 auf einen Querschnitt von 2,5 mm einen Öldurchfluss von 6 l/min bei einem Öldruck von 4,2 bar an der Entnahmestelle in der Zufuhrleitung 4 ergibt. Die Umwälzleistung der Ölpumpe 11 liegt bei 480 l/min. Die Temperatur des aus der Ölwanne 2 austretenden Öls O beträgt etwa 70°C. Die Vorschmierpumpe 21 erbringt beispielsweise 0,8 bar Öldruck. Der Öffnungsdruck des Rückschlagventils 18 sei beispielsweise mit 1 bar ausgelegt. Dann liegt der Druck der Vorschmierpumpe 21 unter dem Öffnungsdruck des Rückschlagventils 18.The ratios are to be illustrated using a numerical example:
The external oil reservoir 3 is supplied with oil O via the supply line 4 via the main oil line 14. Upstream of the oil filter 12 with a pressure of 3 to 10 bar, with a cross-sectional narrowing of the supply line 4 compared to the main oil line 14 to a cross-section of 2.5 mm an oil flow of 6 l/min at an oil pressure of 4.2 bar at the extraction point in the supply line 4. The circulation capacity of the oil pump 11 is 480 l/min. The temperature of the oil O emerging from the oil pan 2 is approximately 70°C. The pre-lubrication pump 21 produces an oil pressure of 0.8 bar, for example. the The opening pressure of the check valve 18 is designed to be 1 bar, for example. The pressure of the pre-lubrication pump 21 is then below the opening pressure of the check valve 18.

Das Ölreservoir 3 weist in etwa das gleiche Ölvolumen wie die Ölwanne 2 auf. Das am Ölkreislauf beteiligte Ölvolumen ist also durch das Ölreservoir 3 verdoppelt.The oil reservoir 3 has approximately the same oil volume as the oil pan 2 . The oil volume involved in the oil circuit is thus doubled by the oil reservoir 3 .

Bezugszeichenliste:Reference list:

11
Brennkraftmaschineinternal combustion engine
22
interne Ölwanneinternal oil pan
33
externes Ölreservoirexternal oil reservoir
44
Zufuhrleitungsupply line
55
Einfüllöffnungfilling hole
66
Rückführleitungreturn line
77
Öltankoil tank
88th
Entnahmeöffnungremoval opening
99
Entnahmeleitungsampling line
1010
Druckumlaufschmierungpressure lubrication
1111
Ölpumpeoil pump
1212
Ölfilteroil filter
1313
Verbraucherconsumer
1414
Hauptölleitungmain oil line
1515
Strömungsleiteinrichtungflow directing device
1616
Entlüftungsleitungvent line
1717
Entlüftungsbohrungvent hole
1818
Rückschlagventilcheck valve
1919
Verbindungsleitungconnection line
2020
Kurbelgehäusecrankcase
2121
Vorschmierpumpepre-lubrication pump
OO
Öloil
GG
Gasgas

Claims (11)

  1. An oil supply system for an internal combustion engine (1), wherein an internal oil pan (2) is disposed in the internal combustion engine (1), wherein the oil supply system has at least one additional external oil reservoir (3) which is disposed outside the internal combustion engine as opposed to the internal oil pan (2) of the internal combustion engine (1), wherein a supply line (4) to be connected to the internal combustion engine (1) is provided which leads to a filling opening (5) of the oil reservoir (3), wherein the supply line (4) branches from a main oil line (14) downstream of an oil pump (11) and guides a secondary stream of oil (O) into the external oil reservoir (3) and wherein a return line (6) to be connected to the internal combustion engine (1) is provided, through which oil (O) can be returned from the oil reservoir (3) to the internal combustion engine (1), wherein the return line (6) is connected to the oil reservoir (3) and wherein the oil reservoir (3) has at least one oil tank (7) and at least one degassing hole (17), wherein a tapping opening (8) of the return line (6) is disposed near the bottom or in the bottom of the at least one oil tank (7), characterized in that a degassing line (16) is provided which connects the oil reservoir (3) to the return line (6), by means of which gases dissolved in the oil (O) together with oil (O) returned via the return line (6) are introduced into a crankcase (20) of the internal combustion engine (1).
  2. The oil supply system according to claim 1, wherein the return line (6) is connected to a tapping line (9) which extends to near the bottom of the at least one oil tank (7), wherein the tapping line (9) has a tapping opening (8) near the bottom of the at least one oil tank (7).
  3. The oil supply system according to claim 1 or claim 2, wherein the supply line (4) opens near the bottom of the at least one oil tank (7).
  4. The oil supply system according to at least one of the preceding claims, wherein at least one flow guiding device (15) is provided in the at least one oil tank (7).
  5. The oil supply system according to at least one of the preceding claims, wherein the return line (6) opens into a crankcase (20) of the internal combustion engine (1).
  6. The oil supply system according to claim 5, wherein the return line (6) opens into the crankcase (20) of the internal combustion engine (1) above an oil level of the oil (O) in the oil pan (2).
  7. The oil supply system according to at least one of the preceding claims, wherein a preferably spring loaded non-return valve (18) is provided in the supply line (4) between the internal combustion engine (1) and the oil reservoir (3) .
  8. The oil supply system according to at least one of the preceding claims, wherein at least two oil tanks (7) disposed in series are provided, wherein the supply line (4) opens into a first oil tank (7) and the at least two oil tanks (7) are connected by means of at least one connecting line (19).
  9. The oil supply system according to claim 8, wherein the return line (6) is connected to the at least second oil tank (7).
  10. The oil supply system according to at least one of claims 1 to 6, wherein the return line (6) is connected to the at least one oil tank (7).
  11. The oil supply system according to at least one of the preceding claims, wherein the tapping line (9) has at least one degassing hole (17) near the cover of the oil tank (7).
EP16740930.9A 2015-06-25 2016-06-20 Oil supply system for an internal combustion engine Active EP3314100B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50551/2015A AT517483B1 (en) 2015-06-25 2015-06-25 Oil supply system for an internal combustion engine
PCT/AT2016/050213 WO2016205844A1 (en) 2015-06-25 2016-06-20 Oil supply system for an internal combustion engine

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EP3314100A1 EP3314100A1 (en) 2018-05-02
EP3314100B1 true EP3314100B1 (en) 2023-01-11

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US (1) US10760459B2 (en)
EP (1) EP3314100B1 (en)
CN (1) CN107709716B (en)
AT (1) AT517483B1 (en)
WO (1) WO2016205844A1 (en)

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GB201914878D0 (en) * 2019-10-15 2019-11-27 Castrol Ltd Motor fluid transfer system and method
CN115405396B (en) * 2022-09-21 2023-10-13 山东源顺智能科技有限公司 Oil supply system of oil pump and control method thereof

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CN107709716B (en) 2021-02-05
US20190203618A1 (en) 2019-07-04
CN107709716A (en) 2018-02-16
EP3314100A1 (en) 2018-05-02
AT517483A4 (en) 2017-02-15
AT517483B1 (en) 2017-02-15
US10760459B2 (en) 2020-09-01
WO2016205844A1 (en) 2016-12-29

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