EP0009564B1 - Lubricating circuit for an internal-combustion engine - Google Patents

Lubricating circuit for an internal-combustion engine Download PDF

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Publication number
EP0009564B1
EP0009564B1 EP79102750A EP79102750A EP0009564B1 EP 0009564 B1 EP0009564 B1 EP 0009564B1 EP 79102750 A EP79102750 A EP 79102750A EP 79102750 A EP79102750 A EP 79102750A EP 0009564 B1 EP0009564 B1 EP 0009564B1
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EP
European Patent Office
Prior art keywords
oil
lubricating
bearing points
pressure
passage
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Expired
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EP79102750A
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German (de)
French (fr)
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EP0009564A1 (en
Inventor
Heinz Dipl.-Ing. Pluequet
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Priority to AT79102750T priority Critical patent/ATE1074T1/en
Publication of EP0009564A1 publication Critical patent/EP0009564A1/en
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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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/108—Lubrication of valve gear or auxiliaries of auxiliaries
    • 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
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • 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
    • F01M5/002—Cooling

Definitions

  • the invention relates to a lubricating oil circuit for an internal combustion engine with a lubricating oil pump, which via an oil cooler and a filter device through a main pressure line, if necessary, oil to storage locations of the internal combustion engine and to more distant storage locations of additional units, e.g. of an exhaust gas turbocharger.
  • the more distant bearing points of additional units are particularly disadvantaged, such as the bearing points of the mostly located at the top of the engine or above Exhaust gas turbocharger.
  • oil of sufficient pressure may appear in the bearing points. only with such a time delay that this does not have a disadvantageous effect during the unloaded start-up and correspondingly strongly delayed or gradual load transfer;
  • the time at which sufficient pressure oil is available is too late for rapid load transfer, as occurs in the case of immediate standby units. This can result in severe damage to the bearing points, unless special measures are taken to ensure that the oil supply starts quickly.
  • a disadvantage of this arrangement is that in this case the total amount of lubricating oil flows through the oil cooler, the pressure drop being increased due to the long line length and the pressure build-up at the distant bearing points being delayed.
  • Another disadvantage is that an oil line to the nearby bearing points of the internal combustion engine remains open at all times and the amount of lubricating oil for these bearing points continuously flows through the filter device, which further hinders a rapid build-up of pressure at the distant bearing points.
  • the object of the invention is achieved by the features listed in the characterizing part of patent claim 1.
  • patent claim 3 ensure that the more distant bearing points are supplied by the direct pressure oil line only in the start-up phase, the oil supply being provided by the latter after the start-up and sufficient pressure in the main pressure line. This ensures that all bearing points are supplied with cooled and, if necessary, filtered oil during normal operation of the internal combustion engine. If there is a relatively small amount of oil flowing through the direct pressure oil line and the distant bearings to be supplied tolerate an oil that has been heated and not recooled according to the engine operation, the direct pressure oil line and the connecting line between the main pressure line can be maintained throughout the engine's operating time and the remote storage points are eliminated.
  • the object of the invention is also achieved by the features of the characterizing part of claim 4. It is assumed that the oil can only flow back through the main pressure line in the case of bearing points protected from the outside, but this is not possible due to the shut-off device.
  • the protection against emptying the bearing points can be ensured that the Branch lines from the main pressure line and its adjoining rooms to the bearing points are designed such that their highest point is higher than all other rooms in the oil circuit. Even if the connecting line from the main pressure oil line to the more distant bearing points, e.g. an exhaust gas turbocharger via lower lying points, is still empty, the oil pressure in the connecting line due to the filled oil chambers will cause the pressure oil to build up in the connecting line just as quickly as this would be the case via a direct pressure oil line.
  • 1 denotes an internal combustion engine which is only shown in outline and which has an oil sump 2 from which a lubricating oil pump 3 can draw in oil.
  • a throttle valve or shut-off device designated 5, 5a is connected, which is connected to a main pressure line 6, in which an oil cooler 7 and a filter device 8 are installed.
  • Branch lines 9 are connected to the main pressure line 6 and lead to bearing points 10 of a crankshaft 11 and to other consumers.
  • a connection line 12 is also connected to the main pressure line 6 and leads via a changeover valve 13 to remote bearing points 14 of an exhaust gas turbocharger 15.
  • a return line 16 leads from the distant bearing points 14 into the oil sump 2.
  • a direct pressure oil line 17 is connected to the pressure port 4 of the lubricating oil pump 3 and leads to the changeover valve 13 via a leak-proof lubricating oil filter 18.
  • the changeover valve 13 is designed so that pressure in the connecting line 12, namely in the area between the main pressure line 6 and the switching valve 13, switches the latter such that a connection between the connecting line and distant bearing points 14 takes place, while in the absence of pressure or a low pressure in the Connecting line, the changeover valve 13 is switched to the switching position shown in the drawing, so that the connecting line is interrupted and the direct pressure oil line is connected to the distant bearing points.
  • the throttle valve or shut-off device is actuated by means of a servo cylinder 19, a piston 20 arranged inside the servo cylinder being acted upon by the pressure in the direct pressure oil line 17 on the one hand by a spring 21 and on the other hand via a control line 22, so that the throttle valve or shut-off device is depressurized or the lowest pressure in the direct pressure oil line is closed and opened with sufficient pressure in the pressure oil line.
  • dash-dotted lines are also shown for 3 bearing points 10 of the crankshaft 1 1 spur lines 9a, which are arranged so that they have a higher point as close as possible to the main pressure line with adjoining spaces, so that the lubricating oil system when using them Stub lines and use of a shut-off valve 5a is designed to be run-proof, in which case the direct pressure oil line 17 can be omitted.

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

Abstract

An arrangement for lubricating, especially for internal combustion engines is disclosed. The circuit of the arrangement is fed with the lubricating medium, e.g. oil, by way of a pump which delivers oil from a source, as required through an oil cooler and a filter, to bearings of the engine which require lubrication, and to more remote bearings, such as are used in auxiliary equipment, e.g. off-gas turbo-superchargers. In the main pressure conduit, relatively close to the pump, there is provided a flow control device with a direct conduit being provided to communicate the pump with the more remote bearings. The direct conduit is connected to the circuit between the pump and the flow control device. As required, an oil filter can be arranged in the direct conduit. The flow control device is controlled by the fluid pressure prevailing in front thereof to open and is spring biased to close, with a further conduit also connected to the circuit between the pump and the flow control device, communicating the pump and the flow control device.

Description

Die Erfindung bezieht sich auf einen Schmierölkreislauf für eine Brennkraftmaschine mit einer Schmierölpumpe, die über ggfs. einen Ölkühler und eine Filtereinrichtung durch eine Hauptdruckleitung Öl zu Lagerstellen der Brennkraftmaschine und zu weiter entfernten Lagerstellen von Zusatzaggregaten, z.B. eines Abgasturboladers, fördert.The invention relates to a lubricating oil circuit for an internal combustion engine with a lubricating oil pump, which via an oil cooler and a filter device through a main pressure line, if necessary, oil to storage locations of the internal combustion engine and to more distant storage locations of additional units, e.g. of an exhaust gas turbocharger.

Es ist bekannt (US-A-4058 981 die Zusatzaggregate wie z.B. den Abgasturbolader über Versorgungsleitungen an die Schmierölpumpe der Brennkraftmaschine anzuschließen und eine Abflußleitung zwischen Turbolader und Ölsumpf vorzusehen. Die Anschlußstellen der Versorgungsleitungen liegen dabei wegen der erforderlichen Kühlung und Filterung des während des Motorbetriebs zugeführten Öls in Durchflußrichtung hinter dem Schmierölkühler bzw. der Filtereinrichtung für das Schmieröl, sowie hinter anderen Teilen des Schmierölkreislaufs wie Zuleitungen usw. Bei längerem Motorstillstand läuft das Öl aus diesen Räumen teilweise oder ganz ab, so daß bei jedem erneuten Motorstart diese Räume aufgefüllt werden müssen, bevor sich der volle Oldruck aufbauen und das Schmieröl in die Lagerstellen drücken kann. Besonders benachteiligt sind dabei die weiter entfernten Lagerstellen von Zusatzaggregaten, wie beispielsweise die Lagerstellen des meist in Höhe der Oberkante des Motors oder noch darüber angeordneten Abgasturboladers. Hier tritt Öl ausreichenden Druckes in Lagerstellen u.U. erst mit einer solchen zeitlichen Verzögerung ein, daß dies sich zwar beim unbelasteten Hochlauf und entsprechend stark verzögerter oder allmählicher Lastübemahme nicht nachteilig auswirkt; für schnelle Lastübernahme wie sie bei Sofortbereitschaftsaggregaten auftritt, liegt jedoch der Zeitpunkt, in dem Drucköl ausreichender Menge vorhanden ist, zu spät. Hierdurch können schwere Zerstörungen an den Lagerstellen auftreten, wenn nicht durch besondere Maßnehmen für eine schnell einsetzende Ölversorgung gesorgt wird.It is known (US-A-4058 981) to connect the additional units, such as the exhaust gas turbocharger, to the lubricating oil pump of the internal combustion engine via supply lines and to provide a drain line between the turbocharger and the oil sump Oil in the flow direction behind the lubricating oil cooler or the filter device for the lubricating oil, as well as behind other parts of the lubricating oil circuit such as supply lines, etc. When the engine is idle for a longer period, the oil drains partially or completely from these rooms, so that every time the engine is restarted, these rooms must be filled up. Before the full old pressure can build up and the lubricating oil can press into the bearing points, the more distant bearing points of additional units are particularly disadvantaged, such as the bearing points of the mostly located at the top of the engine or above Exhaust gas turbocharger. Here oil of sufficient pressure may appear in the bearing points. only with such a time delay that this does not have a disadvantageous effect during the unloaded start-up and correspondingly strongly delayed or gradual load transfer; However, the time at which sufficient pressure oil is available is too late for rapid load transfer, as occurs in the case of immediate standby units. This can result in severe damage to the bearing points, unless special measures are taken to ensure that the oil supply starts quickly.

Bei der bereits bekanntgewordenen Anordnung soll eine beschleunigte Ölversorgung der weiter entfernten Lagerstellen beim Motorstart dadurch sichergestellt werden, daß zum einen das Schmieröl für diese Lagerstellen zeitweise an der Filtereinrichtung vorbeigeführt wird und daß zum anderen die zu den Spritzöldüsen für die Kolbenkühlung führende Leitung zeitweise abgesperrt wird.In the arrangement which has already become known, an accelerated oil supply to the more distant bearing points when the engine is started is to be ensured by firstly passing the lubricating oil for these bearing points past the filter device and secondly by temporarily shutting off the line leading to the spray oil nozzles for piston cooling.

Ein Nachteil dieser Anordnung besteht darin, daß hierbei in jedem Fall die gesamte Schmierölmenge über den Ölkühler strömt, wobei infolge großer Leitungslänge der Druckabfall erhöht ist und der Druckaufbau an den entfernten Lagerstellen sich verzögert. Als weiterer Nachteil ist anzusehen, daß eine Ölleitung zu den nähergelegenen Lagerstellen der Brennkraftmaschine ständig geöffnet bleibt und die Schmierölmenge für diese Lagerstellen dauernd über die Filtereinrichtung strömt, wodurch ein schneller Druckaufbau an den entfernten Lagerstellen weiter behindert wird.A disadvantage of this arrangement is that in this case the total amount of lubricating oil flows through the oil cooler, the pressure drop being increased due to the long line length and the pressure build-up at the distant bearing points being delayed. Another disadvantage is that an oil line to the nearby bearing points of the internal combustion engine remains open at all times and the amount of lubricating oil for these bearing points continuously flows through the filter device, which further hinders a rapid build-up of pressure at the distant bearing points.

Es ist die Aufgabe der Erfindung einen Schmierölkreislauf mit einfachen Mitteln so zu gestalten, daß die Schmierölversorgung auch weiter entfernter Lagerstellen früh genug erfolgt und zuverlässig sichergestellt ist.It is the object of the invention to design a lubricating oil circuit with simple means in such a way that the lubricating oil supply also to distant bearings takes place early enough and is reliably ensured.

Gelöst wird die Aufgabe der Erfindung durch die im Kennzeichen des Patentanspruchs 1 aufgeführten Merkmale. Dabei wird durch Abregeln der Hauptdruckleitung kurz hinter der Schmierölpumpe sichergestellt, daß die entfernten Lagerstellen ggfs: unter Zwischenschaltung eines auslaufgeschützten Schmierölfilters sofort versorgt werden. Damit das Öl bereits durch die ersten Umdrehungen der Schmierölpumpe in die direkte Druckölleitung gezwungen wird und nicht den geringsten Widerstand des Auffüllvorganges der Hauptdruckleitung, wählt, wird dabei der Abfluß zur Hauptdruckleitung durch eine verstellbare Drossel bzw. Absperrorgan kurzfristig behindert bzw. unterbrochen, wobei mit aufkommenden Öldruck über die Steuerleitung der Zufluß zur Hauptdruckleitung voll geöffnet wird, nach Abstellen des Motors jedoch unter Federkraftwirkung wieder in die Drossel- bzw. Absperrstellung geht.The object of the invention is achieved by the features listed in the characterizing part of patent claim 1. By regulating the main pressure line just behind the lubricating oil pump, it is ensured that the distant bearing points are immediately supplied with the interposition of a leak-proof lubricating oil filter. So that the oil is forced into the direct pressure oil line by the first revolutions of the lubricating oil pump and does not choose the slightest resistance of the filling process of the main pressure line, the outflow to the main pressure line is temporarily hindered or interrupted by an adjustable throttle or shut-off device, whereby with emerging Oil pressure via the control line, the inflow to the main pressure line is fully opened, but after switching off the engine it returns to the throttle or shut-off position under spring force.

Durch das Merkmal des Anspruchs 2 wird eine baulich einfache und kostengünstige Anordnung der Steuerleitung empfohlen.Due to the feature of claim 2, a structurally simple and inexpensive arrangement of the control line is recommended.

Durch die Merkmale des Patentanspruchs 3 wird sichergestellt, daß nur in der Anlaufphase die Versorgung der weiter entfernten Lagerstellen durch die direkte Druckölleitung erfolgt, wobei nach dem Hochlaufen und hinreichendem Druck in der Hauptdruckleitung die Ölversorgung durch diese erfolgt. Dadurch wird sichergestellt, daß während des normalen Betriebs der Brennkraftmaschine alle Lagerstellen durch gekühltes und ggfs. gefiltertes Öl versorgt werden. Handelt es sich um eine relativ kleine Ölmenge, die durch die direkte Druckölleitung fließt und vertragen die zu versorgenden entfernten Lagerstellen ein entsprechend dem Motorbetrieb erwärmtes, nicht rückgekühltes Öl, so kann während der gesamten Betriebszeit des Motors die direkte Druckölleitung beibehalten werden und die Verbindungsleitung zwischen Hauptdruckleitung und den entfernten Lagerstellen entfällt.The features of patent claim 3 ensure that the more distant bearing points are supplied by the direct pressure oil line only in the start-up phase, the oil supply being provided by the latter after the start-up and sufficient pressure in the main pressure line. This ensures that all bearing points are supplied with cooled and, if necessary, filtered oil during normal operation of the internal combustion engine. If there is a relatively small amount of oil flowing through the direct pressure oil line and the distant bearings to be supplied tolerate an oil that has been heated and not recooled according to the engine operation, the direct pressure oil line and the connecting line between the main pressure line can be maintained throughout the engine's operating time and the remote storage points are eliminated.

Die Aufgabe der Erfindung wird auch durch die Merkmale des kennzeichnenden Teils des Anspruchs 4 gelöst. Dabei wird von dem Gedanken ausgegangen, daß bei nach außen ablaufgeschützten Lagerstellen das Öl nur durch die Hauptdruckleitung zurückfließen kann, was jedoch durch das Absperrorgan nicht möglich ist. Der Schutz gegen Entleeren der Lagerstellen kann dadurch gewährleistet sein, daß die Stichleitungen von der Hauptdruckleitung und ihren Nebenräumen zu den Lagerstellen derart ausgebildet sind, daß deren höchster Punkt höher liegt, als alle anderen Räume des Ölkreislaufs. Selbst wenn dann noch die Verbindungsleitung von der Hauptdruckölleitung zu den entfernteren Lagerstellen, z.B. eines Abgasturboladers über tiefer liegende Lagerstellen leergelaufen sein sollte, wird dann trotzdem durch den aufkommenden Öldruck bei aufgesteuertem Absperrventil wegen der gefüllten Ölräume der Druckölaufbau in der Verbindungsleitung genauso schnell erfolgen, als dies über eine direkte Druckölleitung der Fall wäre.The object of the invention is also achieved by the features of the characterizing part of claim 4. It is assumed that the oil can only flow back through the main pressure line in the case of bearing points protected from the outside, but this is not possible due to the shut-off device. The protection against emptying the bearing points can be ensured that the Branch lines from the main pressure line and its adjoining rooms to the bearing points are designed such that their highest point is higher than all other rooms in the oil circuit. Even if the connecting line from the main pressure oil line to the more distant bearing points, e.g. an exhaust gas turbocharger via lower lying points, is still empty, the oil pressure in the connecting line due to the filled oil chambers will cause the pressure oil to build up in the connecting line just as quickly as this would be the case via a direct pressure oil line.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung verwiesen, in der ein Ausführungsbeispiel vereinfacht dargestellt ist.To further explain the invention, reference is made to the drawing, in which an exemplary embodiment is shown in simplified form.

In der Zeichnung ist mit 1 eine nur skizziert dargestellte Brennkraftmaschine bezeichnet, die einen Ölsumpf 2 aufweist, aus dem eine Schmierölpumpe 3 Öl ansaugen kann. An dem Druckstutzen 4 der Schmierölpumpe 3 ist ein mit 5, 5a bezeichnetes Drosselventil bzw. Absperrorgan angeschlossen, welches mit einer Hauptdruckleitung 6 verbunden ist, in der ein Ölkühler 7 und eine Filtereinrichtung 8 eingebaut sind. Mit der Hauptdruckleitung 6 sind Stichleitungen 9 verbunden, die zu Lagerstellen 10 einer Kurbelwelle 11 und zu sonstigen Verbrauchern führen. An die Hauptdruckleitung 6 ist weiterhin eine Verbindungsleitung 12 angeschlossen, die über ein Umschaltventil 13 zu entfernten Lagerstellen 14 eines Abgasturboladers 15 führt. Von den entfernten Lagerstellen 14 führt eine Rückflußleitung 16 in den Ölsumpf 2. An den Druckstutzen 4 der Schmierölpumpe 3 ist eine direkte Druckölleitung 17 angeschlossen, die über einen auslaufgeschützten Schmierölfilter 18 zum Umschaltventil 13 führt. Das Umschaltventil 13 ist so ausgebildet, daß Druck in der Verbindungsleitung 12, und zwar im Bereich zwischen Hauptdruckleitung 6 und Umschaltventil 13, letzteres derart umschaltet, daß eine Verbindung zwischen Verbindungsleitung und entfernten Lagerstellen 14 erfolgt, während bei Drucklosigkeit bzw. einem geringen Druck in der Verbindungsleitung das Umschaltventil 13 in die in der Zeichnung dargestellte Schaltstellung umgeschaltet ist, so daß die Verbindungsleitung unterbrochen und die direkte Druckölleitung mit den entfernten Lagerstellen verbunden ist. Das Drosselventil bzw. Absperrorgan wird mittels eines Servozylinders 19 betätigt, wobei ein innerhalb des Servozylinders angeordneter Kolben 20 einerseits von einer Feder 21 und andererseits über eine Steuerleitung 22 vom Druck in der direkten Druckölleitung 17 beaufschlagt wird, so daß das Drosselventil bzw. Absperrorgan bei Drucklosigkeit bzw. geringstem Druck in der direkten Druckölleitung geschlossen und bei hinreichendem Druck in der Druckölleitung geöffnet ist.In the drawing, 1 denotes an internal combustion engine which is only shown in outline and which has an oil sump 2 from which a lubricating oil pump 3 can draw in oil. At the pressure port 4 of the lubricating oil pump 3, a throttle valve or shut-off device designated 5, 5a is connected, which is connected to a main pressure line 6, in which an oil cooler 7 and a filter device 8 are installed. Branch lines 9 are connected to the main pressure line 6 and lead to bearing points 10 of a crankshaft 11 and to other consumers. A connection line 12 is also connected to the main pressure line 6 and leads via a changeover valve 13 to remote bearing points 14 of an exhaust gas turbocharger 15. A return line 16 leads from the distant bearing points 14 into the oil sump 2. A direct pressure oil line 17 is connected to the pressure port 4 of the lubricating oil pump 3 and leads to the changeover valve 13 via a leak-proof lubricating oil filter 18. The changeover valve 13 is designed so that pressure in the connecting line 12, namely in the area between the main pressure line 6 and the switching valve 13, switches the latter such that a connection between the connecting line and distant bearing points 14 takes place, while in the absence of pressure or a low pressure in the Connecting line, the changeover valve 13 is switched to the switching position shown in the drawing, so that the connecting line is interrupted and the direct pressure oil line is connected to the distant bearing points. The throttle valve or shut-off device is actuated by means of a servo cylinder 19, a piston 20 arranged inside the servo cylinder being acted upon by the pressure in the direct pressure oil line 17 on the one hand by a spring 21 and on the other hand via a control line 22, so that the throttle valve or shut-off device is depressurized or the lowest pressure in the direct pressure oil line is closed and opened with sufficient pressure in the pressure oil line.

In der Zeichnung sind weiterhin, strichpunktiert dargestellt, für 3 Lagerstellen 10 der Kurbelwelle 1 1 Stichleitungen 9a vorgesehen, die so angeordnet sind, daß sie möglichst nahe an den Lagerstellen eine höhere Stelle als die Hauptdruckleitung mit Nebenräumen aufweisen, so daß das Schmierölsystem bei Verwendung dieser Stichleitungen und Benutzung eines Absperrventils 5a ablaufgeschützt ausgestaltet ist, wobei dann die direkte Druckölleitung 17 entfallen kann.In the drawing, dash-dotted lines are also shown for 3 bearing points 10 of the crankshaft 1 1 spur lines 9a, which are arranged so that they have a higher point as close as possible to the main pressure line with adjoining spaces, so that the lubricating oil system when using them Stub lines and use of a shut-off valve 5a is designed to be run-proof, in which case the direct pressure oil line 17 can be omitted.

Claims (5)

1. A lubricating-oil circuit for an internal combustion engine, comprising a lubricating oil pump (3) which, optionally by way of an oil cooler (7) and a filter means (8), delivers oil to the bearing points (10) of the internal combustion engine and to more remote bearing points (14) of auxiliary units (15), e.g., of an exhaust-gas driven turbocharger, an adjusting member being provided between the lubricating-oil pump and the bearing points, which adjustment member can be actuated, against spring force, in dependence upon the lubricating oil pressure, characterised in that an adjustable throttle (5) or an adjustable shut-off member (5a) is provided in the main pressure passage (6) leading to the bearing points of the internal combustion engine and as near as possible to the lubricating oil pump (3); that a direct oil-pressure passage (17) is connected between the lubricating oil pump (3) and the throttle (5) or shut-off member (5a), which oil-pressure passage leads optionally via an interposed discharge-protected lubricating-oil filter (18) to the more remote bearing points (14); and that a control passage (22), to which is applied the pressure between the lubricating-oil pump (3) and the throttle (5) or shut-off member (5a), is connected to an adjusting means (19 to 21) for the throttle (5) or the shut-off member (5a), by way of which control passage the adjusting means (19 to 21) is actuated in the opening direction against spring force (21).
2. A lubricating-oil circuit according to claim 1, characterised in that the control passage (22) is connected to the direct oil-pressure passage (17).
3. A lubricating-oil circuit according to claim 1 or claim 2, characterised in that the direct oil-pressure passage (17) leads into a connecting passage (12) arranged between the main pressure passage (6) and the more remote bearing points (14), and that, at the lead-in point, the circuit incorporates a change-over valve (13) which is actuated by the pressure in the connecting passage (12) between the change-over valve (13) and the main pressure passage (6) in such a manner that, above a predetermined pressure in the connecting passage (12), the direct oil-pressure passage (17) is closed off and the connecting passage (12) is connected to the more remote bearing points (14), the connecting passage (12) being closed off when pressure is insufficient and the direct oil-pressure passage (17) being connected to the more remote bearing points (14).
4. A lubricating-oil circuit for an internal combustion engine, comprising a lubricating-oil pump (3) which, optionally by way of an oil cooler (7) and a filter means (8), delivers oil to the bearing points (10) of the internal combustion engine and to more remote bearing points (14) of auxiliary units (15), e.g., of an exhaust gas driven turbocharger, an adjusting member being provided between the lubricating-oil pump and the bearing points, which adjusting member can be actuated, against spring force, in dependence upon the lubricating-oil pressure, characterised in that a shut-off member (5a), which is closed when the pressure is insufficient, is fitted in the main pressure passage (6) to the bearing points (10, 14) of the internal combustion engine and as close as possible to the lubricating-oil pump (3), which shut-off member (5a) is actuatable in the opening direction by the pressure in the main pressure passage (6) upstream of the shut-off member (5a), and that, optionally, the oil cooler (7), the filter means (8) and other compartments, as well as the main pressure passage (6) and its subsidiary spaces, are discharge-protected with respect to the bearing points (10) of the internal combustion engine (1
5. A lubricating-oil circuit according to claim 4, characterised in that the feed passages (9a) provided between the main pressure passage (6) and the bearing points (10) extend, at a location as close as possible to the bearing points (10), to a height above the main pressure passage (6) and its subsidiary spaces.
EP79102750A 1978-10-04 1979-08-01 Lubricating circuit for an internal-combustion engine Expired EP0009564B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102750T ATE1074T1 (en) 1978-10-04 1979-08-01 LUBRICATION OIL CIRCUIT FOR AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2843248 1978-10-04
DE2843248A DE2843248C2 (en) 1978-10-04 1978-10-04 Lubricating oil circuit for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0009564A1 EP0009564A1 (en) 1980-04-16
EP0009564B1 true EP0009564B1 (en) 1982-05-19

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Application Number Title Priority Date Filing Date
EP79102750A Expired EP0009564B1 (en) 1978-10-04 1979-08-01 Lubricating circuit for an internal-combustion engine

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US (2) US4331112A (en)
EP (1) EP0009564B1 (en)
AT (1) ATE1074T1 (en)
DE (1) DE2843248C2 (en)

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US9062575B2 (en) * 1997-10-30 2015-06-23 RPM Industries, LLC Methods and systems for performing, monitoring and analyzing multiple machine fluid processes
US6708710B1 (en) * 1997-10-30 2004-03-23 Rpm Industries, Inc. Vehicle fluid change apparatus and method
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US20070234997A1 (en) * 2006-04-06 2007-10-11 Prenger Nicholas J Turbocharger oil supply passage check valve and method
US8015810B2 (en) * 2007-05-14 2011-09-13 GM Global Technology Operations LLC Control of turbocharger lubrication for hybrid electric vehicle
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Also Published As

Publication number Publication date
US4331112A (en) 1982-05-25
DE2843248A1 (en) 1980-04-30
DE2843248C2 (en) 1984-08-23
ATE1074T1 (en) 1982-06-15
EP0009564A1 (en) 1980-04-16
US4453511A (en) 1984-06-12

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