EP0305689B1 - Lubricating device for a reciprocating-piston engine - Google Patents

Lubricating device for a reciprocating-piston engine Download PDF

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Publication number
EP0305689B1
EP0305689B1 EP88111120A EP88111120A EP0305689B1 EP 0305689 B1 EP0305689 B1 EP 0305689B1 EP 88111120 A EP88111120 A EP 88111120A EP 88111120 A EP88111120 A EP 88111120A EP 0305689 B1 EP0305689 B1 EP 0305689B1
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EP
European Patent Office
Prior art keywords
housing
oil
lubricating device
crankshaft
oil pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88111120A
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German (de)
French (fr)
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EP0305689A2 (en
EP0305689A3 (en
Inventor
Peter Schmid
Hans Dipl.-Ing. Mezger
Dieter Dipl.-Ing. Nowak
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP0305689A3 publication Critical patent/EP0305689A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00—Air cooling
    • F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a lubricating device in a multi-cylinder reciprocating piston engine according to the preamble of claim 1.
  • a housing for a lubricating oil pump is formed in an end cover, which is flanged to the motor housing.
  • the lubricating oil pump and the gear wheel driving it are coaxial with the crankshaft.
  • the lubricating oil pump sucks the oil from a reservoir and conveys it to the lubrication points of the engine via distribution channels and an oil filter, which is attached to the outer side surface of the front cover.
  • This lubrication device is probably well suited for a low-speed engine. In the case of a high-speed engine, considerable noise would be emitted by the oil pump housing formed in the flexible end cover.
  • a lubricating device with an oil pump housing for an internal combustion engine, which is designed as a self-contained unit consisting of two housing parts, the housing parts being centered on their separating surface and screwed to one another and to the crankcase of the internal combustion engine.
  • the oil pump housing should be compact, dimensionally stable and easy to mount on the motor housing and the lubrication device should also be applicable for oil sump lubrication and dry sump lubrication.
  • the characterizing features of claim 1 serve. If the oil pump is closely enclosed by a housing which is composed of two mutually centered and screwed together housing parts, a precisely fitting and stable bearing can be achieved for the pump wheel, so that the noise is minimal and noise emission from a large front cover is avoided. A simple and safe installation is made possible by using the oil pump housing the oil pump and its storage is designed as a pre-assembled unit. In order to further reduce noise and improve oil production, it is also planned to use two smaller oil pumps instead of a large oil pump, which also acts as a suction and pressure pump, one of which works as a suction pump and pressure pump.
  • the inner part of the oil pump housing is centered and radially sealed in the motor housing, the outer housing is sealed on the end face of the motor housing and is screwed to it.
  • a lubrication device is suitable both for oil sump lubrication, in which it sucks oil from the crankcase, and for dry sump lubrication, in which a separate lubricating oil reservoir is provided.
  • a cylindrical oil filter is located centrally between the horizontally installed pressure pump and the suction pump parallel to it, the filter cartridge of which can be removed downwards.
  • the housing of the oil pumps and the oil filter are inserted into the outer contour of the magnesium-cast oil pump housing, the outer diameter of the filter housing being the thickness of the oil pump housing and the length of the filter housing being approximately the same as the height of the oil pump housing.
  • a regulator housing is cast on the top of the oil pump housing approximately flush with the filter housing, which contains a pressure regulator that can be removed upwards.
  • a crankshaft 1 mounted in the middle of a V-engine drives with its crankshaft gear 2 upwards the gearwheels 3 and 4 with which the Control gear for the camshafts of the two rows of cylinders 5 and 6 are driven. Downward, the crankshaft gear 2 meshes to the right with a gear 7, to the left with a gear 8 with which oil pumps are driven.
  • the gears 7 and 8 are mounted with needle bearings on bearing bolts 9 and 10, which are fixed in the motor housing 11. At the end, the gears 7 and 8 carry coupling pieces 12 and 13. These work in a form-fitting manner together with coupling counterparts 14 and 15 and form plug-in couplings 16 and 17 with them, which, like Oldham couplings, can compensate for an axle offset.
  • the coupling piece 14 is attached on the end face to a shaft 18, with which a pressure pump 19 is driven and is mounted in two slide bearings of an oil pump housing 20.
  • the pressure pump 19, with which lubricating oil is conveyed to the bearing points of the V-engine, is a gear pump consisting of two meshing gears 21 and 22.
  • the gear 21 is on the shaft 18, the gear 22 on the one, which is also mounted in slide bearings of the oil pump housing 20 , parallel shaft 23 rotatably.
  • Another gear pump is driven and supported by the same shafts 18 and 23, which serves as a suction pump 24 for extracting lubricating oil from turbochargers 25.
  • two further suction pumps 26 and 27 for extracting lubricating oil from the motor housing 1 are arranged coaxially to one another in the oil pump housing 20.
  • gear pumps each consisting of two meshing gears, which are rotationally fixed on hollow shafts 28 and 29.
  • the hollow shaft 28 is driven via the coupling piece 15 attached to its end face. Both hollow shafts 28 and 29 are supported on both sides in slide bearings of the oil pump housing 20.
  • the oil pump housing 20 is composed of three housing parts which are cast from magnesium. It consists of an inner part 30, an inner part 30 'and an outer part 32 centered on them and screwed to them at a parting plane 31.
  • the inner parts 30, 30' are in the area of the pressure pump 19 and the two suction pumps 26, 27 in bores in the motor housing 11 centered and sealed by radial seals 33.
  • the outer part 32 lies against the end face 34 of the motor housing 11, is sealed against it with axial seals 35 and is fastened to the motor housing 11 by screws 36.
  • An oil filter 37 is arranged approximately in the middle between the two suction pumps 26, 27 and the pressure pump 19. Its cylindrical Filter housing 38 is integrated into the outer contour of the oil pump housing 20 in that its outer diameter is equal to the thickness of the oil pump housing 20 and its length is equal to the height of the oil pump housing 20. After loosening the filter cover 39, the filter cartridge can be pulled out downwards.
  • a regulator housing 40 which contains a pressure regulator for the lubricating oil and an oil channel for the central feeding of the lubricating oil into a central bore of the crankshaft 1.
  • An elastic bushing which is centered in an oil-receiving cap 41 of the crankshaft 1 and in the oil channel of the regulator housing 40, serves to connect the center bore to the oil channel.
  • support eyes 42 are cast on the outer part 32 of the oil pump housing, the bores 43 of which lie parallel and equidistant from the crankshaft 1.
  • the support eyes and the walls of the oil pump housing 20 are so rigid and torsionally rigid that they can absorb the weight of the engine and the dynamic inertia forces caused by it.

Description

Die Erfindung betrifft eine Schmiervorrichtung in einem Mehrzylinder-Hubkolbenmotor nach dem Oberbegriff des Anspruchs 1.The invention relates to a lubricating device in a multi-cylinder reciprocating piston engine according to the preamble of claim 1.

Bei einer aus DE-PS 3203312 bekannten Schmiervorrichtung ist ein Gehäuse für eine Schmierölpumpe in einem Stirndeckel ausgebildet, der an das Motorgehäuse angeflanscht ist. Die Schmierölpumpe und das sie antreibende Zahnrad liegen koaxial zur Kurbelwelle. Die Schmierölpumpe saugt das Öl aus einem Vorratsbehälter an und fördert es über Verteilungskanäle und ein Ölfilter, das an der äußern Seitenfläche des Stirndeckels angesetzt ist, zu den Schmierstellen des Motors. Für einen niedrigtourigen Motor ist diese Schmiervorrichtung wohl gut geeignet. Bei einem hochtourigen Motor würden von dem in dem biegeweichen Stirndeckel ausgebildeten Ölpumpengehäuse erhebliche Geräusche ausgehen.In a lubricating device known from DE-PS 3203312, a housing for a lubricating oil pump is formed in an end cover, which is flanged to the motor housing. The lubricating oil pump and the gear wheel driving it are coaxial with the crankshaft. The lubricating oil pump sucks the oil from a reservoir and conveys it to the lubrication points of the engine via distribution channels and an oil filter, which is attached to the outer side surface of the front cover. This lubrication device is probably well suited for a low-speed engine. In the case of a high-speed engine, considerable noise would be emitted by the oil pump housing formed in the flexible end cover.

Aus DE-A 2502034 ist für eine Brennkraftmaschine eine Schmiervorrichtung mit einem Ölpumpengehäuse bekannt, das als in sich geschlossene Baueinheit aus zwei Gehäuseteilen ausgebildet ist, wobei die Gehäuseteile an ihrer Trennfläche zueinander zentriert sowie miteinander und mit dem Kurbelgehäuse der Brennkraftmaschine verschraubt sind.From DE-A 2502034, a lubricating device with an oil pump housing is known for an internal combustion engine, which is designed as a self-contained unit consisting of two housing parts, the housing parts being centered on their separating surface and screwed to one another and to the crankcase of the internal combustion engine.

Es ist die Aufgabe der Erfindung, eine Schmiervorrichtung für einen Hubkolbenmotor so zu gestalten, daß sie auch bei höchster Motordrehzahl eine ausreichende Lagerschmierung ohne zu starke Geräuschabstrahlung ermöglicht. Das Ölpumpengehäuse soll kompakt, formstabil und einfach am Motorgehäuse montierbar sein und die Schmiervorrichtung soll zugleich für Ölsumpfschmierung und Trockensumpfschmierung anwendbar sein.It is the object of the invention to design a lubricating device for a reciprocating piston engine in such a way that it enables sufficient bearing lubrication without excessive noise emission even at the highest engine speed. The oil pump housing should be compact, dimensionally stable and easy to mount on the motor housing and the lubrication device should also be applicable for oil sump lubrication and dry sump lubrication.

Zur Lösung dieser Aufgabe dienen die kennzeichnenden Merkmale des Anspruchs 1. Wenn die Ölpumpe von einem Gehäuse eng umschlossen ist, das aus zwei zueinander zentrierten und miteinander verschraubten Gehäuseteilen zusammengesetzt ist, läßt sich für das Pumpenrad eine paßgenaue und stabile Lagerung erzielen, so daß die Geräuschbildung minimal ist und eine Geräuschabstrahlung von einem großflächigen Stirndeckel vermieden wird. Eine einfache und sichere Montage wird ermöglicht, indem das Ölpumpengehäuse mit der Ölpumpe und ihrer Lagerung als vormontierbare Baueinheit gestaltet ist. Um eine weitere Geräuschabsenkung und Verbesserung der Ölförderung zu erzielen, ist weiterhin vorgesehen, anstelle einer großen Ölpumpe, die zugleich als Saug- und Druckpumpe wirkt, zwei kleinere Ölpumpen einzusetzen, von denen die eine als Saugpumpe und Druckpumpe arbeitet. Gemäß Anspruch 2 ist das Innenteil des Ölpumpengehäuses im Motorgehäuse zentriert und radial abgedichtet, das Außengehäuse liegt stirnseitig abgedichtet am Motorgehäuse an und ist mit ihm verschraubt. Eine solche Schmiervorrichtung ist sowohl geeignet für Ölsumpfschmierung, bei der sie Öl aus dem Kurbelgehäuse abgesaugt als auch für Trockensumpfschmierung, bei der ein gesonderter Schmierölvorratsbehälter vorgesehen ist. Gemäß Anspruch 4 liegt mittig zwischen der horizontal eingebauten Druckpumpe und der zu ihr parallelen Saugpumpe quer zu ihnen ein zylindrisches Ölfilter, dessen Filterpatrone nach unten ausbaubar ist. Die Gehäuse der Ölpumpen und des Ölfilters sind in die Außenkontur des aus Magnesium gegossenen Ölpumpengehäuses eingefügt, wobei der Außendurchmesser des Filtergehäuses der Dicke des Ölpumpengehäuses, die Länge des Filtergehäuses der Höhe des Ölpumpengehäuses etwa gleich ist.To solve this problem, the characterizing features of claim 1 serve. If the oil pump is closely enclosed by a housing which is composed of two mutually centered and screwed together housing parts, a precisely fitting and stable bearing can be achieved for the pump wheel, so that the noise is minimal and noise emission from a large front cover is avoided. A simple and safe installation is made possible by using the oil pump housing the oil pump and its storage is designed as a pre-assembled unit. In order to further reduce noise and improve oil production, it is also planned to use two smaller oil pumps instead of a large oil pump, which also acts as a suction and pressure pump, one of which works as a suction pump and pressure pump. According to claim 2, the inner part of the oil pump housing is centered and radially sealed in the motor housing, the outer housing is sealed on the end face of the motor housing and is screwed to it. Such a lubrication device is suitable both for oil sump lubrication, in which it sucks oil from the crankcase, and for dry sump lubrication, in which a separate lubricating oil reservoir is provided. According to claim 4, a cylindrical oil filter is located centrally between the horizontally installed pressure pump and the suction pump parallel to it, the filter cartridge of which can be removed downwards. The housing of the oil pumps and the oil filter are inserted into the outer contour of the magnesium-cast oil pump housing, the outer diameter of the filter housing being the thickness of the oil pump housing and the length of the filter housing being approximately the same as the height of the oil pump housing.

Nach Anspruch 6 ist an der Oberseite des Ölpumpengehäuses etwa fluchtend zum Filtergehäuse ein Reglergehäuse angegossen, das einen nach oben herausnehmbaren Druckregler enthält. Die Zusammenfassung dieser verschiedenen Aggregate in einem Gußteil macht es möglich, in ihm sämtliche Verbindungskanäle für das Schmieröl einzugießen. so daß Rohre oder Schläuche entfallen können.According to claim 6, a regulator housing is cast on the top of the oil pump housing approximately flush with the filter housing, which contains a pressure regulator that can be removed upwards. The combination of these various units in one casting makes it possible to pour all the connecting channels for the lubricating oil into it. so that pipes or hoses can be omitted.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend erläutert.An embodiment of the invention is shown in the drawing and is explained below.

Es zeigen:

Fig. 1
Querschnitt des unteren Teil eines Mehrzylinder-V-Motors,
Fig. 2
Schnitt nach Linie II-O-II der Fig. 1 vergrößert,
Fig. 3
Frontansicht zu Fig. 1.

Show it:
Fig. 1
Cross section of the lower part of a multi-cylinder V-engine,
Fig. 2
Section along line II-O-II of Fig. 1 enlarged,
Fig. 3
Front view of FIG. 1.

Eine mittig in einem V-Motor gelagerte Kurbelwelle 1 treibt mit ihrem Kurbelwellenzahnrad 2 nach oben hin die Zahnräder 3 und 4 an, mit denen die Steuergetriebe für die Nockenwellen der beiden Zylinderreihen 5 und 6 angetrieben werden. Nach unten kämmt das Kurbelwellenzahnrad 2 zur rechten Seite hin mit einem Zahnrad 7, zur linken Seite mit einem Zahnrad 8, mit denen Ölpumpen angetrieben werden. Die Zahnräder 7 und 8 sind mit Nadellagern auf Lagerbolzen 9 und 10 gelagert, die im Motorgehäuse 11 befestigt sind. Stirnseitig tragen die Zahnräder 7 und 8 Kupplungsstücke 12 und 13. Diese arbeiten formschlüssig zusammen mit Kupplungsgegenstücken 14 und 15 und bilden mit ihnen Steckkupplungen 16 und 17, die ähnlich wie Oldhamkupplungen einen Achsversatz ausgleichen können.A crankshaft 1 mounted in the middle of a V-engine drives with its crankshaft gear 2 upwards the gearwheels 3 and 4 with which the Control gear for the camshafts of the two rows of cylinders 5 and 6 are driven. Downward, the crankshaft gear 2 meshes to the right with a gear 7, to the left with a gear 8 with which oil pumps are driven. The gears 7 and 8 are mounted with needle bearings on bearing bolts 9 and 10, which are fixed in the motor housing 11. At the end, the gears 7 and 8 carry coupling pieces 12 and 13. These work in a form-fitting manner together with coupling counterparts 14 and 15 and form plug-in couplings 16 and 17 with them, which, like Oldham couplings, can compensate for an axle offset.

Das Kupplungsstück 14 ist stirnseitig an einer Welle 18 angebracht, mit der eine Druckpumpe 19 angetrieben und in zwei Gleitlager eines Ölpumpengehäuses 20 gelagert ist. Die Druckpumpe 19, mit der Schmieröl zu den Lagerstellen des V-Motors gefördert wird, ist eine Zahnradpumpe aus zwei miteinander kämmenden Zahnrädern 21 und 22. Das Zahnrad 21 ist auf der Welle 18, das Zahnrad 22 auf der ebenfalls in Gleitlagern des Ölpumpengehäuses 20 gelagerten, parallelen Welle 23 drehfest. Mit denselben Wellen 18 und 23 ist eine weitere Zahnradpumpe angetrieben und gelagert, die als Saugpumpe 24 zum Absaugen von Schmieröl aus Turboladern 25 dient.The coupling piece 14 is attached on the end face to a shaft 18, with which a pressure pump 19 is driven and is mounted in two slide bearings of an oil pump housing 20. The pressure pump 19, with which lubricating oil is conveyed to the bearing points of the V-engine, is a gear pump consisting of two meshing gears 21 and 22. The gear 21 is on the shaft 18, the gear 22 on the one, which is also mounted in slide bearings of the oil pump housing 20 , parallel shaft 23 rotatably. Another gear pump is driven and supported by the same shafts 18 and 23, which serves as a suction pump 24 for extracting lubricating oil from turbochargers 25.

Links von der Kurbelwelle 1 sind im Ölpumpengehäuse 20 koaxial zueinander zwei weitere Saugpumpen 26 und 27 zum Absaugen von Schmieröl aus dem Motorgehäuse 1 angeordnet. Es sind ebenfalls Zahnradpumpen aus jeweils zwei miteinander kämmenden Zahnrädern, die auf Hohlwellen 28 und 29 drehfest sind. Die Hohlwelle 28 wird über das an ihr stirnseitig angebrachte Kupplungsstück 15 angetrieben. Beide Hohlwellen 28 und 29 sind beidseitig in Gleitlagern des Ölpumpengehäuses 20 gelagert.To the left of the crankshaft 1, two further suction pumps 26 and 27 for extracting lubricating oil from the motor housing 1 are arranged coaxially to one another in the oil pump housing 20. There are also gear pumps, each consisting of two meshing gears, which are rotationally fixed on hollow shafts 28 and 29. The hollow shaft 28 is driven via the coupling piece 15 attached to its end face. Both hollow shafts 28 and 29 are supported on both sides in slide bearings of the oil pump housing 20.

Das Ölpumpengehäuse 20 ist aus drei Gehäuseteilen zusammengesetzt, die aus Magnesium gegossen sind. Es besteht aus einem Innenteil 30, einem Innenteil 30′ und einem zu ihnen zentrierten und an einer Trennebene 31 mit ihnen verschraubten Außenteil 32. Die Innenteile 30, 30′ sind im Bereich der Druckpumpe 19 und der beiden Saugpumpen 26, 27 in Bohrungen des Motorgehäuses 11 zentriert und durch Radialdichtungen 33 abgedichtet. Das Außenteil 32 liegt an der Stirnfläche 34 des Motorgehäuses 11 an, ist gegen sie mit Axialdichtungen 35 abgedichtet und ist durch Schrauben 36 am Motorgehäuse 11 befestigt.The oil pump housing 20 is composed of three housing parts which are cast from magnesium. It consists of an inner part 30, an inner part 30 'and an outer part 32 centered on them and screwed to them at a parting plane 31. The inner parts 30, 30' are in the area of the pressure pump 19 and the two suction pumps 26, 27 in bores in the motor housing 11 centered and sealed by radial seals 33. The outer part 32 lies against the end face 34 of the motor housing 11, is sealed against it with axial seals 35 and is fastened to the motor housing 11 by screws 36.

Etwa mittig zwischen den beiden Saugpumpen 26, 27 und der Druckpumpe 19 ist quer zu ihnen ein Ölfilter 37 angeordnet. Sein zylindrisches Filtergehäuse 38 ist in die Außenkontur des Ölpumpengehäuses 20 integriert, indem sein Außendurchmesser gleich der Dicke des Ölpumpengehäuses 20, sein Länge gleich der Höhe des Ölpumpengehäuses 20 bemessen ist. Nach Lösen des Filterdeckels 39 ist die Filterpatrone nach unten herausziehbar.An oil filter 37 is arranged approximately in the middle between the two suction pumps 26, 27 and the pressure pump 19. Its cylindrical Filter housing 38 is integrated into the outer contour of the oil pump housing 20 in that its outer diameter is equal to the thickness of the oil pump housing 20 and its length is equal to the height of the oil pump housing 20. After loosening the filter cover 39, the filter cartridge can be pulled out downwards.

An der Oberseite des Ölpumpengehäuses 20 ist ein Reglergehäuse 40 angegossen, das einen Druckregler für das Schmieröl und einen Ölkanal zur zentralen Einspeisung des Schmieröls in eine Mittenbohrung der Kurbelwelle 1 enthält. Zur Verbindung der Mittenbohrung mit dem Ölkanal dient eine elastische Buchse, die in einer Ölaufnahmekappe 41 der Kurbelwelle 1 und im Ölkanal des Reglergehäuses 40 zentriert ist.On the top of the oil pump housing 20, a regulator housing 40 is cast, which contains a pressure regulator for the lubricating oil and an oil channel for the central feeding of the lubricating oil into a central bore of the crankshaft 1. An elastic bushing, which is centered in an oil-receiving cap 41 of the crankshaft 1 and in the oil channel of the regulator housing 40, serves to connect the center bore to the oil channel.

An den unteren Eckpunkten sind am Außenteil 32 des Ölpumpengehäuses 20 Tragaugen 42 angegossen, deren Bohrungen 43 parallel und äquidistant zur Kurbelwelle 1 liegen. Die Tragaugen und die Wandungen des Ölpumpengehäuses 20 sind so biege- und torsionssteif ausgeführt, daß sie das Gewicht des Motors und die von ihm verursachten dynamischen Massenkräfte aufnehmen können.At the lower corner points 20 support eyes 42 are cast on the outer part 32 of the oil pump housing, the bores 43 of which lie parallel and equidistant from the crankshaft 1. The support eyes and the walls of the oil pump housing 20 are so rigid and torsionally rigid that they can absorb the weight of the engine and the dynamic inertia forces caused by it.

Claims (11)

1. A lubricating device in a multiple-cylinder reciprocating-piston engine, the crankshaft (1) of the said engine driving at least one oil pump (19) which is arranged in an oil pump housing (20) screwed onto the engine housing (11) at the front end and which conveys lubricating oil from an oil storage tank by way of a filter (37) and distribution ducts to the bearing points of the crankshaft (1), the camshaft and other lubrication points, the oil pump housing (20) being constructed as a self-contained preassembled structural unit comprising two cast housing parts (30 and 32) screwed together in a centred manner on their joint face (31), characterized in that the oil pump housing (20) comprises a pressure pump (19) lying on one side of the crankshaft (1), and at least one suction pump (26) parallel thereto and lying on the other side of the crankshaft (1).
2. A lubricating device according to Claim 1, characterized in that the oil pump housing (20) is formed by an inner part (30) centred in the engine housing (11) and radially sealed, and an outer part (32) sealed and screwed onto the engine housing (11) at the front end.
3. A lubricating device according to Claim 1, characterized in that the pressure pump (19) and the suction pump (26) are arranged below the horizontally lying crankshaft (1), parallel thereto and substantially equidistant therefrom.
4. A lubricating device according to any one of Claims 1 to 3, characterized in that a cylindrical oil filter (37), the filter cartridge of which can be withdrawn vertically downwards, is arranged substantially centrally between the pressure pump (19) and the suction pump (26) and lying transversely thereto.
5. A lubricating device according to Claim 3, characterized in that the housings of the pressure pump (19), of the suction pump (26) and of the oil filter (37) are inserted into the outer profile of the cast oil pump housing (20).
6. A lubricating device according to Claims 1 and 3, characterized in that a regulator housing (40), which comprises a pressure regulator withdrawable upwards and an oil duct for the central oil supply into the crankshaft (1), is integrally cast on the top of the oil pump housing (20).
7. A lubricating device according to Claim 3, characterized in that two suction pumps (26 and 27) driven by a common hollow shaft (28) are mounted coaxially with each other in the oil pump housing (20).
8. A lubricating device according to Claims 3 and 7, characterized in that the pressure pump (19) and the suction pumps (26, 27) are driven by the crankshaft (1) by way of gearwheels (7 and 8) arranged coaxially with the shafts (18 and 28) thereof and mounted in the engine housing (11).
9. A lubricating device according to Claim 8, characterized in that the hollow shaft (28) of the suction pumps (26, 27) and the shaft (18) of the pressure pump (19) can be connected to the gearwheels (7 and 8) by way of plug-in couplings (16 and 17).
10. A lubricating device according to Claims 1, 3 and 7, characterized in that the suction pumps (26, 27) and the pressure pump (19) are constructed as geared pumps and their two meshing gearwheels are arranged on the junction plane (31) between the inner part (30) and the outer part (32) of the oil pump housing (20).
11. A lubricating device according to Claims 1 and 2, characterized in that the oil pump housing (20) is constructed as a bending-resistant and torsion-resistant support member for the reciprocating-piston engine, and support lugs (42), the bores (43) of which are substantially parallel and equidistant from the crankshaft (1), are integrally cast on the support member on both sides.
EP88111120A 1987-09-04 1988-07-12 Lubricating device for a reciprocating-piston engine Expired - Lifetime EP0305689B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873729603 DE3729603A1 (en) 1987-09-04 1987-09-04 LUBRICATION DEVICE FOR A PISTON PISTON ENGINE
DE3729603 1987-09-04

Publications (3)

Publication Number Publication Date
EP0305689A2 EP0305689A2 (en) 1989-03-08
EP0305689A3 EP0305689A3 (en) 1989-08-16
EP0305689B1 true EP0305689B1 (en) 1991-09-11

Family

ID=6335221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111120A Expired - Lifetime EP0305689B1 (en) 1987-09-04 1988-07-12 Lubricating device for a reciprocating-piston engine

Country Status (4)

Country Link
US (1) US4864988A (en)
EP (1) EP0305689B1 (en)
JP (1) JPS6483806A (en)
DE (2) DE3729603A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3921715A1 (en) * 1989-07-01 1991-01-10 Porsche Ag DEVICE FOR DRIVING TWO OIL PUMPS ON A PISTON PISTON INTERNAL COMBUSTION ENGINE
DE19543350C1 (en) * 1995-11-21 1996-11-14 Daimler Benz Ag Support structure for auxiliary equipment on IC engine
IT1292591B1 (en) * 1997-05-30 1999-02-08 Vm Motori Spa ENGINE STRUCTURE FOR INTERNAL COMBUSTION ENGINES.
JP3299526B2 (en) 1999-09-03 2002-07-08 本田技研工業株式会社 Closure structure of through hole in case made of Mg alloy
DE10139267A1 (en) * 2001-08-09 2003-02-27 Porsche Ag Pump device for lubricant of an internal combustion engine
DE102018125876B4 (en) 2018-10-18 2023-04-27 Obrist Technologies Gmbh reciprocating engine
DE102019208847A1 (en) * 2019-06-18 2020-12-24 Vitesco Technologies GmbH Pump stage arrangement, external gear pump, use of a pump stage arrangement and vehicle transmission

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Publication number Priority date Publication date Assignee Title
DE313021C (en) *
US1764078A (en) * 1924-10-22 1930-06-17 Waukesha Motor Co Oiling system
GB305016A (en) * 1928-01-28 1929-08-22 Marius Jean Baptiste Barbarou Arrangement for oil pumps upon aviation engines
FR1081478A (en) * 1952-09-23 1954-12-20 Daimler Benz Ag Lubricating oil pump with chain drive
GB1142899A (en) * 1966-08-30 1969-02-12 Kloeckner Humboldt Deutz Ag Improvements in or relating to internal combustion engines
US3407741A (en) * 1966-09-15 1968-10-29 Caterpillar Tractor Co Compact oil pump for internal combustion engines
DE6906618U (en) * 1969-02-20 1969-07-03 Porsche Kg DRIVE OF A CONVEYOR PUMP, IN PARTICULAR THE LUBRICATION PUMP FOR A FORCED-LUBRICATED SPEED CHANGE GEAR.
CS169208B1 (en) * 1974-01-24 1976-07-29
DE2836094C2 (en) * 1978-08-17 1983-07-14 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Arrangement of an oil pump
DE3044253A1 (en) * 1980-11-25 1982-06-24 Bayerische Motoren Werke AG, 8000 München INTERNAL COMBUSTION ENGINE, ESPECIALLY SINGLE-ROW MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
US4449491A (en) * 1981-01-30 1984-05-22 Honda Giken Kogyo Kabushiki Kaisha Lubricating device for internal combustion engine

Also Published As

Publication number Publication date
US4864988A (en) 1989-09-12
DE3729603A1 (en) 1989-03-16
EP0305689A2 (en) 1989-03-08
JPS6483806A (en) 1989-03-29
EP0305689A3 (en) 1989-08-16
DE3864778D1 (en) 1991-10-17

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