EP1691042B1 - Internal combustion engine having a plurality of cylinders - Google Patents

Internal combustion engine having a plurality of cylinders Download PDF

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Publication number
EP1691042B1
EP1691042B1 EP20050023607 EP05023607A EP1691042B1 EP 1691042 B1 EP1691042 B1 EP 1691042B1 EP 20050023607 EP20050023607 EP 20050023607 EP 05023607 A EP05023607 A EP 05023607A EP 1691042 B1 EP1691042 B1 EP 1691042B1
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EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
cylinder internal
engine according
oil
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EP20050023607
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German (de)
French (fr)
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EP1691042A1 (en
Inventor
Reinhard Könneker
Walter Buck
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP1691042A1 publication Critical patent/EP1691042A1/en
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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
    • F01M11/0004—Oilsumps
    • 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
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0284—Pressure lubrication using lubricating pumps mounting of the pump
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/002—Oilsumps with means for improving the stiffness
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/0079—Oilsumps with the oil pump integrated or fixed to sump
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen

Definitions

  • the invention relates to a multi-cylinder internal combustion engine according to the features of the preamble of patent claim 1.
  • the object of the invention is to improve the lubricating oil circuit of an internal combustion engine, in particular when using these engines in all-terrain vehicles and sports vehicles, where u.a. high lateral accelerations occur to ensure a safe and permanent lubricating oil supply to consumers.
  • first support tube is provided laterally, which is integrally formed out of the lower crankcase and, inter alia, for receiving the ⁇ labsaugpumpen serves.
  • the ⁇ labsaugpumpen are placed close to the ⁇ labsaug Huawei, so that the lubricating oil without the interposition of other lines o.ä. can be sucked directly.
  • the support tube contributes to an increase in stiffness of the crankcase lower part and thus to a high torsional rigidity for the integrated in the crankcase lower part storage chairs.
  • the ⁇ labsaugpumpen are arranged in the support tube one behind the other and are driven by a common shaft.
  • the ⁇ labsaugpumpen each have a cylindrical housing, wherein the adjacent pumps are separated by corresponding housing cover.
  • the ⁇ labsaugpumpen are designed as gear pumps, wherein the axis of the driven and abraded gears are aligned eccentrically to the support tube central axis.
  • an anti-rotation is provided in each case between the housing of the oil suction pump and the housing cover.
  • the entire ⁇ labsaugmodul - consisting of ⁇ labsaugpumpen, oil pump, housing covers - is constructed in an advantageous manner of plastic. This is significantly contributed to a cost-effective lightweight construction of the entire crankcase base.
  • crankcase lower part is formed on the opposite side of the first support tube laterally and symmetrically to the first support tube, a second support tube, the Receiving an oil separator and a water pump is provided. This essential essential for the function of the engine units are integrated to save space in the crankcase lower part.
  • the centrifugal separator formed as an oil-air separator has a rotating drum which is driven by a shaft; This wave simultaneously drives the impeller for the water pump.
  • the required for controlling the small and large cooling circuit thermostat is also integrated in the second support tube.
  • Both on the shaft driving the ⁇ labsaugpumpen and the oil supply pump and on the rotor of the centrifugal separator and the impeller of the water pump driving shaft each have a pinion fixed, both of which are driven by a common chain.
  • the chain itself in turn can be driven by a chain sprocket attached to the crankshaft.
  • Both pinions are received in a formed in the crankcase lower part gears or chain shaft; Trapped in this oil is sucked through a further ⁇ labsaugpumpe.
  • the ⁇ labsaugpumpe for the gear or chain shaft is also taken to save space in the first support tube.
  • the exemplary designed as a V8 engine internal combustion engine consists of a crankcase lower part 2 and a crankcase upper part 4, to which connect the cylinder heads 6 and 8 of the two rows of cylinder banks at the top.
  • the crankshaft 10 is mounted in the parting plane between Kurbelgekoruseunter- and upper part 2, 4.
  • bearing blocks 12a to 12e For supporting the crankshaft 10 in the crankcase lower part 2, hereinafter referred to as Bedplate, bearing blocks 12a to 12e extending transversely to the longitudinal axis 11 of the crankshaft 10 are provided. Semi-circular recesses 13 for receiving the crankshaft 10 are formed in the bearing blocks 12a to 12e. Between the storage chairs 12a to 12e individual rooms, hereinafter referred to as ⁇ labsaugschreib 14a to 14d formed. The ⁇ labsaugschreib 14 a to 14 d are closed at the bottom by an integrally formed from the Bedplate 2 crankcase bottom 16.
  • two support tubes 18 and 20, which are connected to the storage chairs 12a to 12e and to the crankcase bottom 16, are integrated laterally in the bed plate 2.
  • the two support tubes 18 and 20 extend in their longitudinal direction over the entire length of the bedplate 2.
  • the two support tubes 18 and 20, which contribute to increasing the rigidity of the bedplate 2, serve to accommodate aggregates, which are described in more detail below .
  • In the first support tube 18 four ⁇ labsaugpumpen 22a to 22d are arranged in each case.
  • the oil suction pumps 22a to 22d designed as gear pumps have a cylindrical housing 24a to 24d, which are inserted into the first support tube 18.
  • housing covers 26a to 26c are provided between the individual oil suction pumps 22a to 22d.
  • each ⁇ labsaugpumpe 22a to 22d are arranged to form a respective extraction stage two intermeshing gears 28a to 28d and 30a to 30d.
  • the gears 28a to 28d are driven by a first common shaft 32 which is inserted through the central openings of the gears 28a to 28d.
  • a driver 34 is mounted on the cross-section formed as a Torx profile drive shaft 32 which rotatably mounted in a developed out of the Bedplate 2 housing flange 36 and rotatably with a Sprocket 38 is connected.
  • the ⁇ labsaugpumpen 22a to 22d are each located at the level of the ⁇ labsaugschreib 14a to 14d, wherein the suction stage of the ⁇ labsaugpumpen 22a to 22d with the individual ⁇ labsaug Congress 14a to 14d are directly in communication.
  • the cylindrical housing 24a to 24d of the ⁇ labsaugpumpen 22a to 22d and the bedplate 2 corresponding recesses 40 which are shown in Fig. 3 by way of example.
  • a channel section 42a to 42d is respectively provided in the cylindrical housings 24a to 24d, which correspond to openings 44a to 44c introduced into the cylindrical housing covers 26a to 26c and form a total pressure channel through which the lubricating oil can pass. as explained in more detail later - is discharged.
  • the housing 24b to 24d each have a nozzle 23b to 23d, which engages in a formed in the housing cover 26a to 26c recess 25a to 25c.
  • One of the ⁇ labsaugpumpe 22 a upstream ⁇ labsaugpumpe 46 which is smaller compared to the remaining ⁇ labsaugpumpen 22 a to 22 d, is used for the extraction of lubricating oil, which has accumulated in a gear or chain shaft 48.
  • the two gears 46a and 46b are disposed in the housing 24a of the oil suction pump 22a provided for the oil suction space 14a, the driven gear 46a being fitted on the drive shaft 32.
  • the suction side of the ⁇ labsaugpumpe 46 stands with the gears or chain shaft 48 in connection.
  • the oil suction pump 46 is delimited by a closure cover 47 in which an opening 47a is likewise provided for forming the pressure channel.
  • the oil suction pump 22d is delimited by a separating cover 50, to which is connected an oil feed pump 52 integrated in the support tube 18 for implementing a dry sump pressure circulation lubrication.
  • the two gears 52a and 52b are in turn arranged in a cylindrical pump housing 52c.
  • the support tube 18 is closed on its right front side by a cover cover 54.
  • an oil-air separator in the form of a Zentrifugalabscheiders 56 was added.
  • the structure and operation of such a ⁇ labscheiders 56 is known and will therefore only briefly outlined below.
  • a drive shaft 58 By a drive shaft 58, a conical drum 60 of the centrifugal 56 is driven.
  • openings 62 are introduced, via which, as explained in more detail later, the lubricating oil is discharged to an output 64.
  • the centrifugal separator 56 is adjoined by a component designated by the reference numeral 66, in which a through opening 68 is formed, through which a drive shaft 58 is passed.
  • a rolling bearing 70 for the storage of the drive shaft 58 is provided which is axially fixed by a retaining ring 72 in the opening 68.
  • the rolling bearing 70 is followed by a radial shaft sealing ring 74 for sealing.
  • the component part 66a belonging to the component part 66a is designed as a bearing plate for a water pump 76, wherein a mechanical seal package 78 is accommodated for sealing the water pump 76 in the component part 66a in the stepped opening 68.
  • the feed wheel 80 of the water pump 76 is mounted on the drive shaft 58.
  • a Strömungsleitstutzen 84 which is brought close to the separation of suction and discharge side 86, 87 of the water pump 76 to the guide vanes 82 of the water pump 76.
  • a thermostat housing 88 connects, the valve body 89 depending on the water temperature optionally an output 90 or output 92 for the small and large cooling circuit releases or blocks.
  • the second support tube 20 is in turn closed by a cover member 94 having a connection piece 96 for a heating circuit.
  • a housing flange 98 is again formed from the Bedplate 2, in which a plugged onto the drive shaft 58 driver 100 is rotatably mounted.
  • a second pinion 101 is fixed, which is driven together with the first pinion 38 via a common chain drive.

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

Description

Die Erfindung betrifft eine mehrzylindrige Brennkraftmaschine gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a multi-cylinder internal combustion engine according to the features of the preamble of patent claim 1.

Aus der EP 0 921 297 B1 ist eine mehrzylindrige Brennkraftmaschine bekannt, bei der das in einem Ölsumpf befindliche Schmieröl durch eine kombinierte Ölabsaug/Öldruckpumpe aus dem Ölsumpf angesaugt, über einen Öl-Luft-Abscheider entschäumt, den Verbrauchern wieder zugeführt wird.From the EP 0 921 297 B1 a multi-cylinder internal combustion engine is known, in which the oil contained in an oil sump sucked by a combined oil suction / oil pressure pump from the oil sump, defoamed by an oil-air separator, the consumers is supplied again.

Aufgabe der Erfindung ist es, den Schmierölkreislauf einer Brennkraftmaschine zu verbessern, um insbesondere bei Einsatz dieser Motoren in geländegängigen Fahrzeugen und Sportfahrzeugen, bei denen u.a. hohe Querbeschleunigungen auftreten, eine sichere und dauerhafte Schmierölversorgung der Verbraucher sicherzustellen.The object of the invention is to improve the lubricating oil circuit of an internal combustion engine, in particular when using these engines in all-terrain vehicles and sports vehicles, where u.a. high lateral accelerations occur to ensure a safe and permanent lubricating oil supply to consumers.

Die Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst. Dadurch, dass der im Kurbeigehäuseunterteil ausgebildete Ölsumpf in einzelne Ölabsaugräume aufgeteilt und jedem Ölabsaugraum eine im Kurbelgehäuseunterteil integrierte Ölabsaugpumpe zugeordnet ist, wird der Forderung nach einer schnellen und zuverlässigen Ölabsaugung Rechnung getragen. Aufgrund der Aufteilung des Ölsumpfes in einzelne Ölabsaugräume kann ein Hin- und Herschwappen des Schmieröls insbes. bei Quer- und Längsbeschleunigungen reduziert werden. Damit kann die Ölmenge für den Motor insgesamt reduziert werden.The object is solved by the features specified in claim 1. Characterized in that the formed in Kurbeigehäuseunterteil oil sump divided into individual Ölabsaugräume and each Ölabsaugraum an integrated in the crankcase lower part Ölabsaugpumpe is assigned, the demand for a fast and reliable oil extraction is taken into account. Due to the division of the oil sump into individual Ölabsaugräume a back and forth sloshing of the lubricating oil esp. Can be reduced in transverse and longitudinal accelerations. Thus, the total amount of oil for the engine can be reduced.

In den Unteransprüchen sind weitere vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Brennkraftmaschine aufgeführt.In the dependent claims further advantageous embodiments and refinements of the internal combustion engine according to the invention are listed.

Im Kurbelgehäuseunterteil ist seitlich ein in Erstreckungsrichtung der Kurbelwelle verlaufendes erstes Tragrohr vorgesehen, das einstückig aus dem Kurbelgehäuseunterteil herausgebildet ist und u.a. zur Aufnahme der Ölabsaugpumpen dient. Damit sind die Ölabsaugpumpen dicht an den Ölabsaugräumen platziert, so dass das Schmieröl ohne Zwischenschaltung weiterer Leitungen o.ä. direkt abgesaugt werden kann. Gleichzeitig trägt das Tragrohr zu einer Steifigkeitserhöhung des Kurbelgehäuseunterteils und damit zu einer hohen Verwindungssteifigkeit für die im Kurbelgehäuseunterteil integrierten Lagerstühle bei.In the crankcase lower part extending in the direction of extension of the crankshaft first support tube is provided laterally, which is integrally formed out of the lower crankcase and, inter alia, for receiving the Ölabsaugpumpen serves. Thus, the Ölabsaugpumpen are placed close to the Ölabsaugräumen, so that the lubricating oil without the interposition of other lines o.ä. can be sucked directly. At the same time the support tube contributes to an increase in stiffness of the crankcase lower part and thus to a high torsional rigidity for the integrated in the crankcase lower part storage chairs.

Die Ölabsaugpumpen sind im Tragrohr hintereinander angeordnet und werden durch eine gemeinsame Welle angetrieben.The Ölabsaugpumpen are arranged in the support tube one behind the other and are driven by a common shaft.

Die Ölabsaugpumpen weisen jeweils ein zylindrisches Gehäuse auf, wobei die aneinandergrenzenden Pumpen durch entsprechende Gehäusedeckel voneinander getrennt sind.The Ölabsaugpumpen each have a cylindrical housing, wherein the adjacent pumps are separated by corresponding housing cover.

Die Ölabsaugpumpen sind als Zahnradpumpen ausgebildet, wobei die Achse der an- und abgetriebenen Zahnräder exzentrisch zur Tragrohr-Mittelachse ausgerichtet sind. Um ein Verdrehen der Ölabsaugpumpen untereinander zu verhindern, ist jeweils zwischen dem Gehäuse der Ölabsaugpumpe und dem Gehäusedeckel eine Verdrehsicherung vorgesehen.The Ölabsaugpumpen are designed as gear pumps, wherein the axis of the driven and abraded gears are aligned eccentrically to the support tube central axis. In order to prevent rotation of the Ölabsaugpumpen with each other, an anti-rotation is provided in each case between the housing of the oil suction pump and the housing cover.

Das gesamte Ölabsaugmodul - bestehend aus Ölabsaugpumpen, Ölförderpumpe, Gehäusedeckeln - ist auf vorteilhafte Art und Weise aus Kunststoff aufgebaut. Damit wird wesentlich zu einer kostengünstigen Leichtbauweise des gesamten Kurbelgehäuseunterteils beigetragen. Zur Umsetzung einer Trockensumpfschmierung - bei dem das aus den einzelnen Ölabsaugräumen abgesaugte Schmieröl zunächst zu einem Öltank gefördert und von dort aus den Verbrauchern wieder zugeführt wird - ist eine zusätzliche Ölförderpumpe erforderlich. Diese ist ebenfalls platzsparend im ersten Tragrohr aufgenommen.The entire Ölabsaugmodul - consisting of Ölabsaugpumpen, oil pump, housing covers - is constructed in an advantageous manner of plastic. This is significantly contributed to a cost-effective lightweight construction of the entire crankcase base. To implement a dry sump lubrication - in which the extracted from the individual Ölabsaugräumen lubricating oil is first conveyed to an oil tank and from there from the consumers again fed - an additional oil feed pump is required. This is also taken up space saving in the first support tube.

Im Kurbelgehäuseunterteil ist auf der gegenüberliegenden Seite des ersten Tragrohres seitlich und symmetrisch zum ersten Tragrohr ein zweites Tragrohr ausgebildet, das zur Aufnahme eines Ölabscheiders und einer Wasserpumpe vorgesehen ist. Damit sind wesentliche zur Funktion der Brennkraftmaschine erforderliche Aggregate platzsparend im Kurbelgehäuseunterteil integriert.In the crankcase lower part is formed on the opposite side of the first support tube laterally and symmetrically to the first support tube, a second support tube, the Receiving an oil separator and a water pump is provided. This essential essential for the function of the engine units are integrated to save space in the crankcase lower part.

Der als Zentrifugalabscheider ausgebildete Öl-Luft-Separator weist eine rotierende Trommel auf, die von einer Welle angetrieben ist; diese Welle treibt gleichzeitig das Förderrad für die Wasserpumpe an.The centrifugal separator formed as an oil-air separator has a rotating drum which is driven by a shaft; This wave simultaneously drives the impeller for the water pump.

Das zur Steuerung des kleinen und großen Kühlkreislaufes erforderliche Thermostat ist ebenfalls im zweiten Tragrohr integriert.The required for controlling the small and large cooling circuit thermostat is also integrated in the second support tube.

Sowohl an der die Ölabsaugpumpen und die Ölförderpumpe antreibenden Welle als auch an der den Rotor des Zentrifugalabscheiders und das Förderrad der Wasserpumpe antreibenden Welle ist jeweils ein Zahnritzel befestigt, die beide über eine gemeinsame Kette angetrieben sind. Die Kette selbst wiederum kann über ein an der Kurbelwelle befestigtes Kettenritzel angetrieben werden.Both on the shaft driving the Ölabsaugpumpen and the oil supply pump and on the rotor of the centrifugal separator and the impeller of the water pump driving shaft each have a pinion fixed, both of which are driven by a common chain. The chain itself in turn can be driven by a chain sprocket attached to the crankshaft.

Beide Zahnritzel sind in einem im Kurbelgehäuseunterteil ausgebildeten Zahnräder- oder Kettenschacht aufgenommen; darin aufgefangenes Schmieröl wird durch eine weitere Ölabsaugpumpe abgesaugt. Die Ölabsaugpumpe für den Zahnräder- oder Kettenschacht ist dabei platzsparend ebenfalls im ersten Tragrohr aufgenommen.Both pinions are received in a formed in the crankcase lower part gears or chain shaft; Trapped in this oil is sucked through a further Ölabsaugpumpe. The Ölabsaugpumpe for the gear or chain shaft is also taken to save space in the first support tube.

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert. Letztere zeigt in

Fig. 1
den schematischen Aufbau einer Brennkraftmaschine,
Fig. 2
einen Längsschnitt durch ein Kurbelgehäuseunterteil der Brennkraftmaschine gemäß einem Schnitt III-III in Fig. 3 und
Fig. 3
einen Querschnitt durch das Kurbelgehäuseunterteil gemäß einem Schnitt II-II in Fig. 2.
An embodiment of the invention is explained in more detail in the following description and drawings. The latter shows in
Fig. 1
the schematic structure of an internal combustion engine,
Fig. 2
a longitudinal section through a crankcase lower part of the internal combustion engine according to a section III-III in Fig. 3 and
Fig. 3
a cross section through the crankcase lower part according to a section II-II in Fig. 2nd

Die exemplarisch als V8-Motor ausgebildete Brennkraftmaschine besteht aus einem Kurbelgehäuseunterteil 2 und einem Kurbelgehäuseoberteil 4, an das sich nach oben hin die Zylinderköpfe 6 und 8 der beiden Zylinderbankreihen anschließen. In der Trennebene zwischen Kurbelgehäuseunter- und -oberteil 2, 4 ist die Kurbelwelle 10 gelagert.The exemplary designed as a V8 engine internal combustion engine consists of a crankcase lower part 2 and a crankcase upper part 4, to which connect the cylinder heads 6 and 8 of the two rows of cylinder banks at the top. In the parting plane between Kurbelgehäuseunter- and upper part 2, 4, the crankshaft 10 is mounted.

Zur Lagerung der Kurbelwelle 10 im Kurbelgehäuseunterteil 2, im folgenden als Bedplate bezeichnet, sind quer zur Längsachse 11 der Kurbelwelle 10 verlaufende Lagerstühle 12a bis 12e vorgesehen. In den Lagerstühlen 12a bis 12e sind halbkreisförmige Ausnehmungen 13 zur Aufnahme der Kurbelwelle 10 ausgebildet. Zwischen den Lagerstühlen 12a bis 12e sind einzelne Räume, im folgenden als Ölabsaugräume 14a bis 14d bezeichnet, ausgebildet. Die Ölabsaugräume 14a bis 14d sind nach unten hin durch einen einstückig aus dem Bedplate 2 herausgebildeten Kurbelwannenboden 16 abgeschlossen.For supporting the crankshaft 10 in the crankcase lower part 2, hereinafter referred to as Bedplate, bearing blocks 12a to 12e extending transversely to the longitudinal axis 11 of the crankshaft 10 are provided. Semi-circular recesses 13 for receiving the crankshaft 10 are formed in the bearing blocks 12a to 12e. Between the storage chairs 12a to 12e individual rooms, hereinafter referred to as Ölabsaugräume 14a to 14d formed. The Ölabsaugräume 14 a to 14 d are closed at the bottom by an integrally formed from the Bedplate 2 crankcase bottom 16.

Wie insbes. aus Fig. 3 ersichtlich, sind jeweils seitlich im Bedplate 2 zwei Tragrohre 18 und 20 integriert, die mit den Lagerstühlen 12a bis 12e sowie dem Kurbelwannenboden 16 verbunden sind. Die beiden Tragrohre 18 und 20 erstrecken sich dabei in ihrer Längsrichtung über die gesamte Länge des Bedplates 2. Die beiden Tragrohre 18 und 20, die zu einer Erhöhung der Steifigkeit des Bedplates 2 beitragen, dienen der Aufnahme von Aggregaten, die im Folgenden näher beschrieben sind. Im ersten Tragrohr 18 sind jeweils vier Ölabsaugpumpen 22a bis 22d angeordnet. Die als Zahnradpumpen ausgebildeten Ölabsaugpumpen 22a bis 22d weisen ein zylindrisches Gehäuse 24a bis 24d auf, die in das erste Tragrohr 18 eingeschoben sind. Zur Abtrennung sind zwischen den einzelnen Ölabsaugpumpen 22a bis 22d Gehäusedeckel 26a bis 26c vorgesehen. Im Gehäuse 24a bis 24d jeder Ölabsaugpumpe 22a bis 22d sind zur Bildung jeweils einer Absaugstufe zwei miteinander kämmende Zahnräder 28a bis 28d und 30a bis 30d angeordnet. Die Zahnräder 28a bis 28d werden dabei von einer ersten gemeinsamen Welle 32 angetrieben, die durch die zentralen Öffnungen der Zahnräder 28a bis 28d durchgesteckt ist.As can be seen in particular from FIG. 3, two support tubes 18 and 20, which are connected to the storage chairs 12a to 12e and to the crankcase bottom 16, are integrated laterally in the bed plate 2. The two support tubes 18 and 20 extend in their longitudinal direction over the entire length of the bedplate 2. The two support tubes 18 and 20, which contribute to increasing the rigidity of the bedplate 2, serve to accommodate aggregates, which are described in more detail below , In the first support tube 18 four Ölabsaugpumpen 22a to 22d are arranged in each case. The oil suction pumps 22a to 22d designed as gear pumps have a cylindrical housing 24a to 24d, which are inserted into the first support tube 18. For the separation, housing covers 26a to 26c are provided between the individual oil suction pumps 22a to 22d. In the housing 24a to 24d each Ölabsaugpumpe 22a to 22d are arranged to form a respective extraction stage two intermeshing gears 28a to 28d and 30a to 30d. The gears 28a to 28d are driven by a first common shaft 32 which is inserted through the central openings of the gears 28a to 28d.

An dem - bezogen auf die Darstellung in Fig. 2 - linken Ende der Antriebswelle 32 ist ein Mitnehmer 34 auf die im Querschnitt als Torx-Profil ausgebildete Antriebswelle 32 aufgesteckt, der in einem aus dem Bedplate 2 herausgebildeten Gehäuseflansch 36 drehbar gelagert und drehfest mit einem Zahnritzel 38 verbunden ist.On the - in relation to the illustration in Fig. 2 - left end of the drive shaft 32, a driver 34 is mounted on the cross-section formed as a Torx profile drive shaft 32 which rotatably mounted in a developed out of the Bedplate 2 housing flange 36 and rotatably with a Sprocket 38 is connected.

Die Ölabsaugpumpen 22a bis 22d sind jeweils auf der Höhe der Ölabsaugräume 14a bis 14d angeordnet, wobei die Saugstufe der Ölabsaugpumpen 22a bis 22d mit den einzelnen Ölabsaugräumen 14a bis 14d direkt in Verbindung stehen. Dazu weisen die zylindrischen Gehäuse 24a bis 24d der Ölabsaugpumpen 22a bis 22d sowie das Bedplate 2 entsprechende Ausnehmungen 40 auf, die in Fig. 3 exemplarisch dargestellt sind. Auf der Druckseite jeder Ölabsaugpumpe 22a bis 22d ist in den zylindrischen Gehäusen 24a bis 24d jeweils ein Kanalabschnitt 42a bis 42d vorgesehen, die mit in den zylindrischen Gehäusedeckeln 26a bis 26c eingebrachten Öffnungen 44a bis 44c korrespondieren und insgesamt einen Druckkanal bilden, über den das Schmieröl - wie noch später näher erläutert - abgeführt wird. Als Verdrehsicherung für die Ölabsaugpumpen 22b bis 22d weisen die Gehäuse 24b bis 24d jeweils einen Stutzen 23b bis 23d auf, der in eine im Gehäusedeckel 26a bis 26c ausgebildete Ausnehmung 25a bis 25c eingreift.The Ölabsaugpumpen 22a to 22d are each located at the level of the Ölabsaugräume 14a to 14d, wherein the suction stage of the Ölabsaugpumpen 22a to 22d with the individual Ölabsaugräumen 14a to 14d are directly in communication. For this purpose, the cylindrical housing 24a to 24d of the Ölabsaugpumpen 22a to 22d and the bedplate 2 corresponding recesses 40, which are shown in Fig. 3 by way of example. On the pressure side of each oil suction pump 22a to 22d, a channel section 42a to 42d is respectively provided in the cylindrical housings 24a to 24d, which correspond to openings 44a to 44c introduced into the cylindrical housing covers 26a to 26c and form a total pressure channel through which the lubricating oil can pass. as explained in more detail later - is discharged. As an anti-rotation device for the Ölabsaugpumpen 22b to 22d, the housing 24b to 24d each have a nozzle 23b to 23d, which engages in a formed in the housing cover 26a to 26c recess 25a to 25c.

Eine der Ölabsaugpumpe 22a vorgelagerte Ölabsaugpumpe 46, die gegenüber den restlichen Ölabsaugpumpen 22a bis 22d kleiner ausgebildet ist, dient der Absaugung von Schmieröl, das sich in einem Zahnräder- oder Kettenschacht 48 angesammelt hat. Die beiden Zahnräder 46a und 46b sind im Gehäuse 24a der für den Ölabsaugraum 14a vorgesehenen Ölabsaugpumpe 22a angeordnet, wobei das angetriebene Zahnrad 46a auf der Antriebswelle 32 aufgesteckt ist. Die Saugseite der Ölabsaugpumpe 46 steht dabei mit dem Zahnräder- oder Kettenschacht 48 in Verbindung. Stirnseitig ist die Ölabsaugpumpe 46 von einem Abschlußdeckel 47 begrenzt, in dem ebenfalls eine Öffnung 47a zur Ausbildung des Druckkanals vorgesehen ist.One of the Ölabsaugpumpe 22 a upstream Ölabsaugpumpe 46, which is smaller compared to the remaining Ölabsaugpumpen 22 a to 22 d, is used for the extraction of lubricating oil, which has accumulated in a gear or chain shaft 48. The two gears 46a and 46b are disposed in the housing 24a of the oil suction pump 22a provided for the oil suction space 14a, the driven gear 46a being fitted on the drive shaft 32. The suction side of the Ölabsaugpumpe 46 stands with the gears or chain shaft 48 in connection. On the front side, the oil suction pump 46 is delimited by a closure cover 47 in which an opening 47a is likewise provided for forming the pressure channel.

Die Ölabsaugpumpe 22d ist von einem Trenndeckel 50 begrenzt, an den sich eine im Tragrohr 18 integrierte Ölförderpumpe 52 zur Umsetzung einer Trockensumpf-Druckumlaufschmierung anschließt. Die beiden Zahnräder 52a und 52b sind wiederum in einem zylindrischen Pumpengehäuse 52c angeordnet. Wie aus Fig. 2 ersichtlich, ist das Tragrohr 18 an seiner rechten Stirnseite durch einen Abschlussdeckel 54 verschlossen.The oil suction pump 22d is delimited by a separating cover 50, to which is connected an oil feed pump 52 integrated in the support tube 18 for implementing a dry sump pressure circulation lubrication. The two gears 52a and 52b are in turn arranged in a cylindrical pump housing 52c. As can be seen from FIG. 2, the support tube 18 is closed on its right front side by a cover cover 54.

Das gesamte in das Tragrohr 18 eingesteckte Ölpumpenmodul, bestehend aus den einzelnen Ölabsaugpumpen 22a bis 22d, 46 mit Zahnradsätzen und Gehäuse, den Gehäuse-Trenn- und -Abschlussdeckeln 26a bis 26c, 47, 50 und 54 ist mit Ausnahme der Antriebswelle 32, die z.B. aus Stahl besteht, aus Kunststoff gefertigt, wobei die gesamte vormontierte Baueinheit auf einfache Art und Weise - bezogen auf die Darstellung gemäß Fig. 2 - von rechts in das Tragrohr 18 eingeschoben ist.The entire oil pump module inserted into the support tube 18, consisting of the individual oil suction pumps 22a to 22d, 46 with gear sets and housings, the housing isolating and sealing covers 26a to 26c, 47, 50 and 54, with the exception of the drive shaft 32, e.g. made of steel, made of plastic, wherein the entire preassembled unit in a simple manner - based on the representation of FIG. 2 - is inserted from the right into the support tube 18.

Im zweiten Tragrohr 20 ist - von links beginnend - ein Öl-Luft-Separator in Form eines Zentrifugalabscheiders 56 aufgenommen. Der Aufbau und die Wirkungsweise eines derartigen Ölabscheiders 56 ist bekannt und wird daher im folgenden nur kurz umrissen. Durch eine Antriebswelle 58 wird eine konisch verlaufende Trommel 60 des Zentrifugalabscheiders 56 angetrieben. In der Gehäusewand des Zentrifugalabscheiders 56 sind Öffnungen 62 eingebracht, über die, wie später noch näher erläutert, das Schmieröl zu einem Ausgang 64 abgeführt wird. An den Zentrifugalabscheider 56 schließt sich ein mit dem Bezugszeichen 66 versehenes Bauteil an, in dem eine durchgehende Öffnung 68 ausgebildet ist, durch die eine Antriebswelle 58 hindurchgeführt ist. In der Öffnung 68 ist von links nach rechts gesehen ein Wälzlager 70 für die Lagerung der Antriebswelle 58 vorgesehen, das durch einen Sicherungsring 72 in der Öffnung 68 axial festgelegt ist. An das Wälzlager 70 schließt sich zur Abdichtung ein Radialwellendichtring 74 an. Der zum Bauteil 66 gehörende Bauteilabschnitt 66a ist als Lagerschild für eine Wasserpumpe 76 ausgebildet, wobei zur Abdichtung der Wasserpumpe 76 im Bauteilabschnitt 66a in der gestuft ausgebildeten Öffnung 68 ein Gleitringdichtpaket 78 aufgenommen ist. Am stirnseitigen Ende des Bauteilabschnittes 66a ist auf der Antriebswelle 58 das Förderrad 80 der Wasserpumpe 76 befestigt. Auf der den Leitschaufeln 82 des Förderrades 80 zugewandten Stirnseite schließt sich ein Strömungsleitstutzen 84 an, der zur Trennung von Saug- und Druckseite 86, 87 der Wasserpumpe 76 dicht an die Leitschaufeln 82 der Wasserpumpe 76 herangeführt ist. An den Strömungsleitstutzen 84 schließt sich ein Thermostatgehäuse 88 an, dessen Ventilkörper 89 in Abhängigkeit von der Wassertemperatur wahlweise einen Ausgang 90 oder Ausgang 92 für den kleinen und großen Kühlkreislauf freigibt oder sperrt. Am Ende wird das zweite Tragrohr 20 wiederum durch ein Deckelelement 94 verschlossen, das einen Anschlussstutzen 96 für einen Heizungskreislauf aufweist.In the second support tube 20 - starting from the left - an oil-air separator in the form of a Zentrifugalabscheiders 56 was added. The structure and operation of such a Ölabscheiders 56 is known and will therefore only briefly outlined below. By a drive shaft 58, a conical drum 60 of the centrifugal 56 is driven. In the housing wall of Zentrifugalabscheiders 56 openings 62 are introduced, via which, as explained in more detail later, the lubricating oil is discharged to an output 64. The centrifugal separator 56 is adjoined by a component designated by the reference numeral 66, in which a through opening 68 is formed, through which a drive shaft 58 is passed. In the opening 68 is seen from left to right a rolling bearing 70 for the storage of the drive shaft 58 is provided which is axially fixed by a retaining ring 72 in the opening 68. The rolling bearing 70 is followed by a radial shaft sealing ring 74 for sealing. The component part 66a belonging to the component part 66a is designed as a bearing plate for a water pump 76, wherein a mechanical seal package 78 is accommodated for sealing the water pump 76 in the component part 66a in the stepped opening 68. At the front end of the component portion 66a, the feed wheel 80 of the water pump 76 is mounted on the drive shaft 58. On the guide vanes 82 of the feed wheel 80 facing the end face is followed by a Strömungsleitstutzen 84 which is brought close to the separation of suction and discharge side 86, 87 of the water pump 76 to the guide vanes 82 of the water pump 76. At the flow guide 84, a thermostat housing 88 connects, the valve body 89 depending on the water temperature optionally an output 90 or output 92 for the small and large cooling circuit releases or blocks. At the end, the second support tube 20 is in turn closed by a cover member 94 having a connection piece 96 for a heating circuit.

An dem Zahnräder- oder Kettenschacht 48 zugeordneten Ende der Antriebswelle 58 ist aus dem Bedplate 2 wiederum ein Gehäuseflansch 98 herausgebildet, in dem ein auf die Antriebswelle 58 aufgesteckter Mitnehmer 100 drehbar gelagert ist. Am Ende des Mitnehmers 100 ist ein zweites Zahnritzel 101 befestigt, welches zusammen mit dem ersten Zahnritzel 38 über einen gemeinsamen Kettentrieb angetrieben ist.At the gear or chain shaft 48 associated end of the drive shaft 58, a housing flange 98 is again formed from the Bedplate 2, in which a plugged onto the drive shaft 58 driver 100 is rotatably mounted. At the end of the driver 100, a second pinion 101 is fixed, which is driven together with the first pinion 38 via a common chain drive.

Abschließend wird noch der als Trockensumpfschmierung ausgebildete Ölkreislauf erläutert:

  • Das in den einzelnen Ölabsaugräumen 14a bis 14d aufgefangene Schmieröl wird über die Ölabsaugpumpen 22a bis 22d abgesaugt und über den Druckkanal 42 und eine nicht dargestellte Druckleitung, die symbolisch mit der gestrichelten Linie 102 dargestellt ist, auf die andere Seite des Bedplates 2 in den Zentrifugalabscheider 56 geführt. Das im Zahnräder- oder Kettenschacht 48 angesammelte Schmieröl wird ebenfalls mit Hilfe der Ölabsaugpumpe 46 über den Druckkanal 42 dem Zentrifugalabscheider 56 zugeführt. Durch die rotierende Trommel 60 des Zentrifugalabscheiders 56 wird das Schmieröl über die Öffnungen 62 nach außen gegen die Innenwand des Tragrohres 20 geschleudert und fließt dann über den Ausgang 64 ab (siehe Linie 102a), der mit einem nicht dargestellten Öltank verbunden ist. Die Gasbestandteile - wie anhand der Linie 102b dargestellt - werden über einen Ausgang 104 abgeführt. Mit Hilfe der Ölförderpumpe 52 wird das im Öltank befindliche Schmieröl wieder den Verbrauchern, wie z.B. den Hauptlagern der Kurbelwelle, zugeführt.
Finally, the oil circuit designed as dry sump lubrication is explained:
  • The collected in the individual Ölabsaugräumen 14a to 14d lubricating oil is sucked through the Ölabsaugpumpen 22a to 22d and via the pressure channel 42 and a pressure line, not shown, which is symbolically represented by the dashed line 102, on the other side of the Bedplates 2 in the Zentrifugalabscheider 56th guided. The accumulated in the gear or chain shaft 48 lubricating oil is also supplied with the aid of the Ölabsaugpumpe 46 via the pressure passage 42 to the Zentrifugalabscheider 56. By the rotating drum 60 of the Zentrifugalabscheiders 56, the lubricating oil is thrown through the openings 62 outwardly against the inner wall of the support tube 20 and then flows through the output 64 (see line 102 a), which is connected to an oil tank, not shown. The gas components - as shown by line 102b - are discharged via an output 104. With the help of the oil feed pump 52 is in the Oil tank located lubricating oil back to consumers, such as the main bearings of the crankshaft fed.

Claims (13)

  1. Multi-cylinder internal combustion engine having an upper and a lower crankcase part (2, 4), in which are formed bearing seats (12) for holding a crankshaft (10), characterized in that individual oil suction spaces (14a to 14d) are formed in the lower crankcase part (12), which oil suction spaces (14a to 14d) are assigned in each case one oil suction pump (22a to 22d) which is integrated in the lower crankcase part (2).
  2. Multi-cylinder internal combustion engine according to Claim 1, characterized in that, for holding the oil suction pumps (22a to 22d), a first support tube (18) which runs in the direction of extent of the crankshaft (10) and which is formed in one piece from the crankcase lower part (2) is provided laterally in the lower crankcase part (2).
  3. Multi-cylinder internal combustion engine according to Claim 1 or 2, characterized in that the oil suction pumps (22a to 22d) are driven by a common shaft (32).
  4. Multi-cylinder internal combustion engine according to Claim 2 or 3, characterized in that the oil suction pumps (22a to 22d) have in each case one cylindrical housing (24a to 24d) which are pushed into the first support tube (18), and in that the oil suction pumps (22a to 22d) are separated from one another by housing covers (26a to 26c).
  5. Multi-cylinder internal combustion engine according to Claim 4, characterized in that an anti-twist device is provided between the housing (24a to 24d) of the oil suction pumps (22a to 22d) and the housing cover (26a to 26c).
  6. Multi-cylinder internal combustion engine according to one of Claims 2 to 5, characterized in that an oil feed pump (52) is held in the first support tube (18), which oil feed pump (52) is likewise driven by the common shaft (32).
  7. Multi-cylinder internal combustion engine according to one of Claims 4 to 6, characterized in that the oil pump module - composed of oil suction pumps (22a to 22d, 46), oil feed pump (52), housing cover (26a to 26c, 50, 54) - is composed of plastic.
  8. Multi-cylinder internal combustion engine according to one of Claims 2 to 7, characterized in that a second support tube (20) is formed laterally in the lower crankcase part (2) on the opposite side from the first support tube (18), which second support tube (20) is provided for holding an oil separator (56) and a water pump (76).
  9. Multi-cylinder internal combustion engine according to Claim 8, characterized in that the rotor of the centrifugal separator (56) and the feed wheel (80) of the water pump (76) are driven by a common shaft (58).
  10. Multi-cylinder internal combustion engine according to Claim 8 or 9, characterized in that the thermostat (88) for controlling the cooling circuit of the internal combustion engine is likewise held in the second support tube (20).
  11. Multi-cylinder internal combustion engine according to Claim 3 and 9, characterized in that in each case one sprocket (38, 102) is fastened to the two ends of the shafts (32, 58), which sprockets (38, 102) are both driven by means of a common chain.
  12. Multi-cylinder internal combustion engine according to Claim 11, characterized in that the sprockets (38, 102) are held in a gearwheel or chain slot (48) which is formed in the lower crankcase part (2), and in that lubricating oil which is situated in the gearwheel or chain slot (48) can be sucked out by means of a further oil suction pump (46).
  13. Multi-cylinder internal combustion engine according to Claim 12, characterized in that the oil suction pump (46) for the gearwheel or chain slot (48) is likewise held in the first support tube (18).
EP20050023607 2005-01-14 2005-10-28 Internal combustion engine having a plurality of cylinders Active EP1691042B1 (en)

Applications Claiming Priority (1)

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DE200510001863 DE102005001863A1 (en) 2005-01-14 2005-01-14 Multicylinder internal combustion engine has crank case upper part and crank case lower part in which bearing blocks are formed for seating crankshaft whereby individual oil suction chambers are formed in crank case lower part

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EP1691042B1 true EP1691042B1 (en) 2008-01-23

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DE102010011477A1 (en) * 2010-03-16 2011-09-22 Audi Ag Dry sump lubrication-integrated internal combustion engine i.e. V-type 8-cylinder internal combustion engine, for motor car, has pump with stage arranged in common pump casing, which is formed as integral part of sump or part of crankcase

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DE102008022444A1 (en) * 2008-04-30 2009-11-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal-combustion engine for vehicle, has return line for returning lubricating oil, and air oil separator positioned horizontally i.e. parallel to vehicle longitudinal axis, at inner side of oil collector
DE102011115248A1 (en) 2011-09-28 2013-03-28 Daimler Ag Crankshaft housing for use in internal combustion engine of motor car, has oil pump integrated into base part and sucking off resource oil from oil suction spaces and supplying resource oil to oil sump, where base part partly forms oil pump
CN102748087A (en) * 2012-06-14 2012-10-24 东风朝阳朝柴动力有限公司 Fuel pump system integrated with engine body
DE102013113757A1 (en) * 2013-12-10 2015-06-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Arrangement in a lubricating oil circuit of an internal combustion engine for pumping lubricating oil
DE102015004614A1 (en) 2015-04-08 2016-10-13 Daimler Ag Separating device for a reciprocating internal combustion engine
DE102019102894B3 (en) 2019-02-06 2020-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Centrifugal separator
DE102020121596B3 (en) 2020-08-18 2021-11-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pump module

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DE19754008C2 (en) * 1997-12-05 2003-04-10 Daimler Chrysler Ag reciprocating internal combustion engine
DE19754009A1 (en) * 1997-12-05 1999-03-04 Daimler Benz Ag Water-cooled reciprocating piston internal combustion engine with at least one cylinder bank
DE19754007C1 (en) * 1997-12-05 1999-05-20 Daimler Chrysler Ag Crankcase for multiple cylinder internal combustion engine
DE10014368B4 (en) * 2000-03-23 2004-05-19 Dr.Ing.H.C. F. Porsche Ag Oil collecting device for an internal combustion engine

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Publication number Priority date Publication date Assignee Title
DE102010011477A1 (en) * 2010-03-16 2011-09-22 Audi Ag Dry sump lubrication-integrated internal combustion engine i.e. V-type 8-cylinder internal combustion engine, for motor car, has pump with stage arranged in common pump casing, which is formed as integral part of sump or part of crankcase

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EP1691042A1 (en) 2006-08-16
DE102005001863A1 (en) 2006-07-20

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