EP2980374B1 - Ventilation device with oil separator - Google Patents

Ventilation device with oil separator Download PDF

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Publication number
EP2980374B1
EP2980374B1 EP15002144.2A EP15002144A EP2980374B1 EP 2980374 B1 EP2980374 B1 EP 2980374B1 EP 15002144 A EP15002144 A EP 15002144A EP 2980374 B1 EP2980374 B1 EP 2980374B1
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EP
European Patent Office
Prior art keywords
oil
internal combustion
combustion engine
separator
engine according
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EP15002144.2A
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German (de)
French (fr)
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EP2980374A1 (en
Inventor
Claus Brüstle
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Neander Motors AG
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Neander Motors AG
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    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/001—Arrangements, apparatus and methods for handling fluids used in outboard drives
    • B63H20/002—Arrangements, apparatus and methods for handling fluids used in outboard drives for handling lubrication liquids
    • 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
    • F01M11/08—Separating lubricant from air or fuel-air mixture before entry into cylinder
    • 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
    • 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
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • 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
    • F02B75/007—Other engines having vertical crankshafts
    • 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
    • F02B75/06—Engines with means for equalising torque
    • F02B75/065—Engines with means for equalising torque with double connecting rods or crankshafts
    • 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
    • F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups

Definitions

  • the invention relates to an internal combustion engine of Hubkolbenbauart, for example in the form of an outboard motor for a boat according to the preamble of patent claim 1.
  • EP 10 2012 015 907 B3 comprising two reciprocating pistons moving in a cylinder crankcase. Each piston is coupled by two connecting rods with two crankshafts rotating in opposite directions of rotation. The crankshafts are upright to a waterline of the boat and affect a boat bolt to move the boat.
  • the internal combustion engine operates on the diesel process and is provided with a fuel injection system.
  • a turbocharger device having an exhaust gas turbine and a compressor. The latter is connected to the suction side of the internal combustion engine.
  • the DE 35 09 439 C2 is a device for venting a crankcase of an internal combustion engine for the separation of oil from an oil-gas mixture again. Through passages in the crankcase and a space of a valve mechanism of the cylinder head, the oil-and-gas mixture passes into a first chamber of an oil separator. A second chamber connects to the first chamber, wherein a control valve is provided between the first chamber and the second chamber.
  • a gas outlet duct leads into an intake system of the internal combustion engine.
  • blow-by gases starting from a crank chamber of the internal combustion engine, are supplied to an intake system of the internal combustion engine by flow channels which are in each case operatively connected to one another and configured in a cylinder crankcase, a cylinder block and a cylinder head.
  • the internal combustion engine which has at least one piston and two upright crankshafts and has an outboard motor, has a venting system with a highly effective oil separator device having an oil preseparator and an oil main separator. It makes a significant contribution to environmental protection, especially when using the outboard engine with boats on running and standing water.
  • a highly effective oil separator device having an oil preseparator and an oil main separator.
  • the oil-leakage gas mixture is transported by means of the arranged adjacent to the upper end discharge line from the crankcase of the cylinder crankcase in the ⁇ lvorabscheider, wherein for structural simplification, the discharge line is moved outside the engine housing along the upper end face.
  • the function of the venting system or the oil separation device is extended by also introducing the oil-leakage mixture from the valve camshaft area of the cylinder head into the oil preseparator and the main oil separator by means of a first passage.
  • the oil pre-separator has at least first and second upright guide chambers which are separated by a guide element into which a second passage between the chambers adjacent to the lower end face of the engine housing is incorporated for the passage of the oil-leak gas mixture.
  • An advantageous design of the ⁇ lvorabscheiders is achieved when the oil-gas mixture in the first guide channel from top to bottom between the upper end and the lower end side along the guide element and enters through the second passage in the second guide chamber, via said oil Leakage gas mixture flows in the direction of the upper end face and from there passes with the interposition of a third passage in the main oil separator.
  • the ⁇ lvorabscheider and the main oil separator are composed with the interposition of an annular spacer, such that between ⁇ lvorabscheider and spacers and spacers and ⁇ lhautabscheider run connecting planes and that the ⁇ lvorabscheider, the spacer and the oil main are connected to each other via one or more connecting screws , which connecting screws adjacent to an edge zone of the housing structure are effective approximately perpendicular to the connecting planes.
  • a high-level construction is achieved in that the oil separator is provided with a labyrinth, on which the oil-leakage gas mixture is passed, whereby on the one hand, the gas to the intake system and on the other hand the oil are separated to the oil pan.
  • the labyrinth has guide webs spaced apart from each other which alternately intermesh from opposite first and second upright sides and are arranged to direct separated oil of the oil-leakage gas mixture into return passages in the direction of the oil pan .
  • An internal combustion engine 1 of Hubkolbenbauart is designed as an outboard motor 2, which drives a boat 3. Of the boat 3, only one transverse rear wall 4 is shown, on which the outboard motor 2 is held in position by means of holding elements 5 and 6 in position.
  • the internal combustion engine 1 comprises two reciprocating pistons 7 and 8 - Fig. 3 - of which each piston, for example, 7 with the intermediary of two connecting rods 9 and 10 - Fig. 2 with two in opposite directions of rotation Dr1 and Dr2 and parallel to each other extending crankshafts 11 and 12 are in operative connection.
  • the crankshafts 11 and 12 are arranged upright to a waterline WI of the boat 3 and drive one below the waterline WI - Fig. 1 - acting boot bolt 13 on.
  • the crankshafts 11 and 12 are provided with flywheels 15 and 16, which overlap partially to save space - Fig.1 -.
  • An engine housing 17 of the internal combustion engine 1 is composed of a cylinder crankcase 18 accommodating the crankshafts 11 and 12 and a cylinder head 23 serving to accommodate intake and exhaust valves 19 and 20 and camshafts 21 and 22.
  • the engine housing 17 is exposed from an upper end face StO. Fig.1 - And a lower end face StU limited.
  • the internal combustion engine 1 operates according to the diesel injection method, with an exhaust gas turbocharger device 24 being provided on the upper end side StO for improving the torque curve, the fuel consumption and the exhaust gas emission values.
  • the exhaust gas turbocharger device 24 - Fig. 1- is formed by an exhaust gas turbine 25 and a compressor 26 connected to an intake system 27. Fig. 3 and 6 - The internal combustion engine 1 is connected.
  • the engine casing 17 is provided with a venting system 28 having an oil separator 29 and an oil separator 30 having an oil main separator 30.
  • Fig. 3 - Has, over the during operation of the internal combustion engine 1, in a crank chamber 32 of the cylinder crankcase 18 resulting oil leakage gas mixture.
  • the oil-leak gas mixture results from mixing even with optimum sealing between piston skirt Km and cylinder wall Zw - Fig. 2 - Gas passing through-also called blow-by gas- and smaller and larger oil drops that cause the movements of the crankshafts 11 and 12 and the connecting rods 9 and 10 in the crankcase.
  • the oil-leak gas mixture passes through the intermediary of a discharge line 33 extending adjacent the upper end face StO into the oil pre-separator 29, from where said oil-leakage gas mixture is conducted into the main oil separator 30.
  • this mixture is separated into the components oil and gas leakage, wherein the oil flows into a subsequent to the lower end side StU oil pan 34 and the leak gas in the vicinity of the upper end face StO in the intake 27 andin the compressor 25.
  • the discharge line 33 is formed by a pipe member 35 which is laid outside the engine casing 17 along the upper end-StO.
  • An oil-leak gas mixture in a valve camshaft area VN-G which arises in a manner similar to the oil-leak gas mixture in the crank chamber 32, flows adjacent to the discharge line 33 or 35 opening into the oil pre-separator 29 via a first passage 36 between the cylinder head 23 and oil pre-separator 29 in the latter a.
  • the ⁇ lvorabscheider 29 comprises upright to the water line WI extending first and second guide chambers 37 and 38, between which a flat guide element 39 extends.
  • a second passage 40th is provided in the guide element 39 in the guide element 39.
  • the guide chambers 37 and 38 and the guide element 39 extend over a substantial length Lzy of the cylinder head 23, wherein the second passage 40 adjacent to the lower end face StU is incorporated into the guide element 39.
  • the oil-leak gas mixture in the first guide chamber 37 is guided from top to bottom between the upper end side StO and the lower end side StU along the guide element 39 and enters through the second passage 40 in the second guide chamber 38, via said oil Leakage gas mixture in the direction of the upper end face StO flows and from there with the interposition of a third passage 41 into the main oil separator 30 passes.
  • the extracted in this control of the oil-leakage gas mixture oil flows through a fourth passage 42 in the oil pan 34 back.
  • the ⁇ lvorabscheiders 29 and the ⁇ lhauptabscheider 30 are combined to form a housing structure 43, of which at least the main oil separator 30 by means of retaining screws 44 and 45 is held on the cylinder head 23 in position.
  • the oil pre-separator 29 is in the embodiment - Fig. 4 - Made in one piece with the cylinder head 23. It is also conceivable, however, to design the oil pre-separator 29 separately from the cylinder head 23.
  • the ⁇ lvorabscheider 29 and the main oil separator 30 with the interposition of an annular spacer 46 at connection levels Ve1 and Ve2 is composed.
  • This component configuration enables a demand-based volume design -VI, VII and VII- of the oil pre-separator 29, the spacer 46 and the main oil separator 30 for a defined treatment of the oil-leakage gas mixture.
  • the oil pre-separator 29, the spacer body 46 and the oil main separator 30 are united via one or more connecting screws 47.
  • the connecting bolts 47 are effective adjacent to a peripheral zone 48 of the housing structure 43 approximately perpendicular to the connecting planes Ve1 and Ve2. Below the one or more of the connecting screws 47 extends an outer contour 49 of a Ansaugluftkanalhaube 50.
  • the ⁇ lhauptabscheider 30 is designed in the manner of a cover 51 of the housing structure 43 and the ⁇ lhauptabscheiders 30 which is introduced with a peripheral connecting edge 52 to the spacer body 46.
  • the oil main separator 30 is provided with a labyrinth 53- Fig. 3 and Fig. 6 , where the oil-leakage gas mixture is passed, whereby on the one hand, the leak gas to the intake 27 and on the other hand, the oil is led to the oil pan 34 out.
  • the labyrinth 53 is mounted on an inner side 54 of the lid 51 and is formed by spaced guide ribs 55, 56 and 57, 58 extending from opposite upright sides 59 and 60 transversely to a longitudinal direction Lr and at a defined angle of inclination.
  • the guide webs 55, 56 and 57, 58 alternately interlock, and may be curved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Description

Die Erfindung bezieht sich auf eine Brennkraftmaschine der Hubkolbenbauart, beispielsweise in Gestalt eines Außenbordmotors für ein Boot nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an internal combustion engine of Hubkolbenbauart, for example in the form of an outboard motor for a boat according to the preamble of patent claim 1.

Es ist eine als Außenbordmotor in einem Boot wirkende Brennkraftmaschine bekannt, EP 10 2012 015 907 B3 , die zwei sich in einem Zylinderkurbelgehäuse bewegende Hubkolben umfasst. Jeder Hubkolben ist unter Vermittlung von zwei Pleueln mit zwei Kurbelwellen gekoppelt, die in entgegengesetzte Drehrichtungen rotieren. Die Kurbelwellen sind aufrecht zu einer Wasserlinie des Boots angeordnet und beeinflussen eine Bootschraube zur Bewegung des Boots. Die Brennkraftmaschine arbeitet nach dem Dieselverfahren, und sie ist mit einer Kraftstoffeinspritzanlage versehen. An einer oberen Stirnseite eines aus einem Zylinderkurbelgehäuse und einem Zylinderkopf bestehenden Brennkraftmaschinengehäuses ist eine Turboladereinrichtung angeordnet, die über eine Abgasturbine und einen Verdichter verfügt. Letzterer ist an die Saugseite der Brennkraftmaschine angeschlossen.It is known as an outboard motor acting in a boat internal combustion engine, EP 10 2012 015 907 B3 comprising two reciprocating pistons moving in a cylinder crankcase. Each piston is coupled by two connecting rods with two crankshafts rotating in opposite directions of rotation. The crankshafts are upright to a waterline of the boat and affect a boat bolt to move the boat. The internal combustion engine operates on the diesel process and is provided with a fuel injection system. At an upper end side of an engine casing consisting of a cylinder crankcase and a cylinder head, there is disposed a turbocharger device having an exhaust gas turbine and a compressor. The latter is connected to the suction side of the internal combustion engine.

Nach der Veröffentlichung "A NEW CONCEPT FOR THE OUTBORD MARKET; Speech by Claus Brüstle on October 8, 2013 at the 22nd Aachen Colloquium Automobile and Engine Technology", weist die darin erörterte Brennkraftmaschine zukunftsweisende technische Merkmale und wirtschaftliche Marktchancen auf. Diese Brennkraftmaschine basiert auf dem Konstruktionsprinzip, wie es in der vorstehenden EP 10 2012 015 907 B3 dargestellt ist.According to the publication "A NEW CONCEPT FOR THE OUTBOARD MARKET on October 8, 2013 at the 22 nd Aachen Colloquium Automobile and Engine Technology", the internal combustion engine discussed therein has pioneering technical features and economic market opportunities. This internal combustion engine is based on the design principle, as described in the preceding EP 10 2012 015 907 B3 is shown.

Die DE 35 09 439 C2 gibt eine Vorrichtung zur Entlüftung eines Kurbelgehäuses einer Brennkraftmaschine zur Abscheidung von Öl aus einem Öl-Leckgas-Gemisch wieder. Über Durchgänge im Kurbelgehäuse und einem Raum eines Ventilmechanismus des Zylinderkopfs gelangt das Öl-Leckgas-Gemisch in eine erste Kammer eines Ölabscheiders. An die erste Kammer schließt eine zweite Kammer an, wobei zwischen erster Kammer und zweiter Kammer ein Steuerventil vorgesehen ist.The DE 35 09 439 C2 is a device for venting a crankcase of an internal combustion engine for the separation of oil from an oil-gas mixture again. Through passages in the crankcase and a space of a valve mechanism of the cylinder head, the oil-and-gas mixture passes into a first chamber of an oil separator. A second chamber connects to the first chamber, wherein a control valve is provided between the first chamber and the second chamber.

Von der zweiten Kammer führt ein Gasauslasskanal in ein Ansaugsystem der Brennkraftmaschine.From the second chamber, a gas outlet duct leads into an intake system of the internal combustion engine.

In der DE 10 2006 038 831 A1 wird eine Brennkraftmaschine mit Rückführung von Blow-By-Gasen in einem geschlossenen System behandelt. Dabei werden Blow-By-Gase, ausgehend von einem Kurbelraum der Brennkraftmaschine, durch jeweils miteinander in Wirkverbindung stehende und in einem Zylinderkurbelgehäuse, einem Zylinderblock und einem Zylinderkopf ausgestaltete Strömungskanäle einem Ansaugsystem der Brennkraftmaschine zugeführt.In the DE 10 2006 038 831 A1 an internal combustion engine is treated with recirculation of blow-by gases in a closed system. In this case, blow-by gases, starting from a crank chamber of the internal combustion engine, are supplied to an intake system of the internal combustion engine by flow channels which are in each case operatively connected to one another and configured in a cylinder crankcase, a cylinder block and a cylinder head.

Es ist Aufgabe der Erfindung eine Brennkraftmaschine der Hubkolbenbauart z.B. in Gestalt eines Außenbordmotors für ein Boot, umfassend wenigstens einen über zwei Pleuel mit zwei parallelen, gegenläufig rotierenden und aufrecht im Boot stehenden Kurbelwellen zusammenarbeitenden Kolben in der Weise zu optimieren, dass durch gezielte Maßnahmen Schadstoffe, hervorgerufen durch ein beim Betrieb der Brennkraftmaschine in einem Brennkraftmaschinengehäuse entstehendes Öl-Leckgas-Gemisch, gezielt weitgehend reduziert werden.It is an object of the invention to provide a reciprocating type internal combustion engine of e.g. in the form of an outboard motor for a boat, comprising at least one over two connecting rods with two parallel, counter-rotating and standing upright in the boat cranks cooperating pistons in such a way that by targeted measures pollutants caused by a during operation of the internal combustion engine in an internal combustion engine housing resulting oil-leakage gas mixture, targeted largely reduced.

Diese Aufgabe wird nach der Erfindung mit den Merkmalen des Anspruchs 1 gelöst. Weitere, die Erfindung ausgestattende Merkmale sind in den Unteransprüchen enthalten.This object is achieved according to the invention with the features of claim 1. Further features embodying the invention are contained in the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, dass die über wenigstens einen Kolben und zwei aufrechte Kurbelwellen verfügende als Außenbordmotor ausgebildete Brennkraftmaschine ein Entlüftungssystem mit einer einen Ölvorabscheider und einen Ölhauptabscheider aufweisenden hochwirksamen Ölabscheidereinrichtung besitzt. Sie leistet einen bedeutenden Beitrag zum Umweltschutz gerade beim Einsatz des Außenbordmotors mit Booten auf fließendem und stehendem Wasser. Über besagte Ölabscheideeinrichtung wird das beim Betrieb der Brennkraftmaschine z.B. in einem Kurbelraum entstehende Öl-Leckgas-Gemisch auf besonders effiziente Weise durch besagte Ölabscheideeinrichtung geleitet und in die Bestandteile d.h. ÖI und Leckgas getrennt. Dabei werden funktionsgerecht das Öl der Ölwanne und das Leckgas dem Ansaugsystem der Brennkraftmaschine zugeführt. Das Öl-Leckgas-Gemisch wird mittels der benachbart der oberen Stirnseite angeordneten Abführungsleitung von dem Kurbelraum des Zylinderkurbelgehäuses in den Ölvorabscheider transportiert, wobei zur baulichen Vereinfachung die Abführungsleitung außerhalb des Brennkraftmaschinengehäuses entlang der oberen Stirnseite verlegt ist.The advantages achieved by the invention are to be seen in the fact that the internal combustion engine, which has at least one piston and two upright crankshafts and has an outboard motor, has a venting system with a highly effective oil separator device having an oil preseparator and an oil main separator. It makes a significant contribution to environmental protection, especially when using the outboard engine with boats on running and standing water. About said Ölabscheideeinrichtung the resulting during operation of the internal combustion engine, for example, in a crankcase oil-leakage gas mixture is passed in a particularly efficient manner by said oil separator and separated into the components ie oil and gas leakage. Here are the functionally the oil the oil pan and the leak gas supplied to the intake system of the internal combustion engine. The oil-leakage gas mixture is transported by means of the arranged adjacent to the upper end discharge line from the crankcase of the cylinder crankcase in the Ölvorabscheider, wherein for structural simplification, the discharge line is moved outside the engine housing along the upper end face.

Die Funktion des Entlüftungssystems bzw. der Ölabscheideeinrichtung wird dadurch erweitert, dass auch das Öl-Leckgas-Gemisch aus dem Ventil-Nockenwellengebiet des Zylinderkopfs in den Ölvorabscheider und den Ölhauptabscheider mittels eines ersten Durchgangs eingebracht wird. Beispielgebend ist, dass der Ölvorabscheider zumindest über erste und zweite aufrechte Leitkammern verfügt, die durch ein Leitelement getrennt sind, in das zum Durchströmen des Öl-Leckgas-Gemischs ein zweiter Durchgang zwischen den Kammern benachbart der unteren Stirnseite des Brennkraftmaschinengehäuses eingearbeitet ist. Eine vorteilhafte Gestaltung des Ölvorabscheiders wird erreicht, wenn das Öl-Leckgas-Gemisch in dem ersten Leitkanal von oben nach unten zwischen der oberen Stirnseite und der unteren Stirnseite entlang des Leitelements geführt und durch den zweiten Durchgang in die zweite Leitkammer eintritt, über die besagtes Öl-Leckgas-Gemisch in Richtung obere Stirnseite strömt und von dort unter Zwischenschaltung eines dritten Durchgangs in den Ölhauptabscheider gelangt.The function of the venting system or the oil separation device is extended by also introducing the oil-leakage mixture from the valve camshaft area of the cylinder head into the oil preseparator and the main oil separator by means of a first passage. By way of example, the oil pre-separator has at least first and second upright guide chambers which are separated by a guide element into which a second passage between the chambers adjacent to the lower end face of the engine housing is incorporated for the passage of the oil-leak gas mixture. An advantageous design of the Ölvorabscheiders is achieved when the oil-gas mixture in the first guide channel from top to bottom between the upper end and the lower end side along the guide element and enters through the second passage in the second guide chamber, via said oil Leakage gas mixture flows in the direction of the upper end face and from there passes with the interposition of a third passage in the main oil separator.

Maßstäbe werden gesetzt, wenn der Ölvorabscheider und der Ölhauptabscheider zu einer Gehäusestruktur zu einer Gehäusestruktur zusammengefasst sind und wenn zumindest Gehäuseteile der Gehäusestruktur unter Vermittlung von Halteschrauben am Zylinderkopf des Brennkraftmaschinengehäuses befestigt sind. Ergänzend hierzu ist hervorzuheben, dass der Ölvorabscheider und der Ölhauptabscheider unter Zwischenschaltung eines ringförmigen Distanzkörpers zusammengesetzt sind, dergestalt, dass zwischen Ölvorabscheider und Distanzkörper sowie Distanzkörper und Ölhautabscheider Verbindungsebenen verlaufen und dass der Ölvorabscheider, der Distanzkörper und der Ölhauptabscheider über ein oder mehrere Verbindungsschrauben miteinander verbunden sind, welche Verbindungsschrauben benachbart einer Randzone der Gehäusestruktur etwa senkrecht zu den Verbindungsebenen wirksam sind. Konstruktiv günstig gelöst ist, dass der Ölhauptabscheider nach Art einer Haube der Gehäusestruktur ausgebildet ist, die mit einem umlaufenden Anschlussrand an den Distanzkörper herangeführt ist.Standards are set when the Ölvorabscheider and the main oil separator are combined to form a housing structure to a housing structure and when at least housing parts of the housing structure are fastened by means of retaining screws on the cylinder head of the engine housing. In addition, it should be emphasized that the Ölvorabscheider and the main oil separator are composed with the interposition of an annular spacer, such that between Ölvorabscheider and spacers and spacers and Ölhautabscheider run connecting planes and that the Ölvorabscheider, the spacer and the oil main are connected to each other via one or more connecting screws , which connecting screws adjacent to an edge zone of the housing structure are effective approximately perpendicular to the connecting planes. Is achieved structurally favorable that the main oil separator is formed in the manner of a hood of the housing structure, which is brought with a peripheral connecting edge to the spacer body.

Ein hochrangige Bauweise wird dadurch erreicht, dass der Ölabscheider mit einem Labyrinth versehen ist, an dem das Öl-Leckgas-Gemisch vorbeigeführt wird, wodurch zum einen das Gas zum Ansaugsystem hin und zum anderen das Öl zur Ölwanne hin separiert werden. Dies wird noch dadurch unterstützt, dass das Labyrinth mit Abstand zueinander angeordnete Leitstege aufweist, die von gegenüberliegenden ersten und zweiten aufrechten Seiten aus wechselweise ineinandergreifen und in der Weise angeordnet sind, dass separiertes Öl des Öl-Leckgas-Gemischs in Rückführungskanäle in Richtung Ölwanne geleitet wird. Schließlich wird eine ausgeklügelte und einfache Konstruktion erreicht, wenn die Leitstege des Labyrinths an der Innenseite der Haube des Ölhauptabscheiders angebracht sind.A high-level construction is achieved in that the oil separator is provided with a labyrinth, on which the oil-leakage gas mixture is passed, whereby on the one hand, the gas to the intake system and on the other hand the oil are separated to the oil pan. This is further assisted in that the labyrinth has guide webs spaced apart from each other which alternately intermesh from opposite first and second upright sides and are arranged to direct separated oil of the oil-leakage gas mixture into return passages in the direction of the oil pan , Finally, a sophisticated and simple construction is achieved when the guide webs of the labyrinth are attached to the inside of the hood of the main oil separator.

In der Zeichnung wird ein Ausführungsbeispiel der Erfindung gezeigt, das nachstehend näher erläutert wird.In the drawing, an embodiment of the invention is shown, which will be explained in more detail below.

Es zeigen

  • Fig1 eine Schrägansicht von hinten links auf eine Brennkraftmaschine der Hubklobenbauart, die als Außenbordmotor in ein Boot eingebaut ist,
  • Fig. 2 einen schematischen Querschnitt durch die Brennkraftmaschine nach Fig. 1 im Bereich eines Kolbens, der mit zwei Kurbelwellen in Wirkverbindung steht,
  • Fig. 3 einen schematischen Längsschnitt der Brennkraftmaschine nach Fig. 1 mit einem Entlüftungssystem, umfassend eine Ölabscheidereinrichtung mit Ölvorabscheider und Ölhauptabscheider,
  • Fig. 4 eine Schrägansicht auf ein Brennkraftmaschinengehäuse der Brennkraftmaschine mit einer Ölabscheidereinrichtung nach Fig. 3,
  • Fig. 5 einen Schnitt nach der Linie IV-IV der Fig. 4 in größerem Maßstab,
  • Fig. 6 eine Ansicht in Richtung Innenseite des Ölhauptabscheiders mit Leitstegen eines Labyrinths.
Show it
  • fig1 an oblique view from the rear left of a Hubklobenbau engine, which is installed as an outboard motor in a boat,
  • Fig. 2 a schematic cross section through the internal combustion engine according to Fig. 1 in the area of a piston, which is in operative connection with two crankshafts,
  • Fig. 3 a schematic longitudinal section of the internal combustion engine after Fig. 1 with a deaeration system comprising an oil separator with oil pre-separator and main oil separator,
  • Fig. 4 an oblique view of an internal combustion engine housing of the internal combustion engine with an oil separator after Fig. 3 .
  • Fig. 5 a section along the line IV-IV of Fig. 4 on a larger scale,
  • Fig. 6 a view towards the inside of the main oil separator with Leitstegen a labyrinth.

Eine Brennkraftmaschine 1 der Hubkolbenbauart ist als Außenbordmotor 2 ausgebildet, der ein Boot 3 antreibt. Von dem Boot 3 ist lediglich eine Querheckwand 4 dargestellt, an der der Außenbordmotor 2 unter Vermittlung von Halteelementen 5 und 6 in Lage gehalten wird. Die Brennkraftmaschine 1 umfasst zwei Hubkolben 7 und 8 -Fig. 3-, wovon jeder Kolben z.B. 7 unter Vermittlung von zwei Pleueln 9 und 10 -Fig. 2-mit zwei in gegenläufigen Drehrichtungen Dr1 und Dr2 und parallel sich zueinander erstreckenden Kurbelwellen 11 und 12 in Wirkverbindung stehen. Die Kurbelwellen 11 und 12 sind aufrecht zu einer Wasserlinie WI des Boots 3 angeordnet und treiben eine unterhalb der Wasserlinie WI -Fig. 1- fungierende Bootschraube 13 an. Auf einer der Bootschraube 13 abgekehrten Seite bei 14 sind die Kurbelwellen 11 und 12 mit Schwungrädern 15 und 16 versehen, die sich zur Raumersparnis bereichsweise überdecken -Fig.1-.An internal combustion engine 1 of Hubkolbenbauart is designed as an outboard motor 2, which drives a boat 3. Of the boat 3, only one transverse rear wall 4 is shown, on which the outboard motor 2 is held in position by means of holding elements 5 and 6 in position. The internal combustion engine 1 comprises two reciprocating pistons 7 and 8 - Fig. 3 - of which each piston, for example, 7 with the intermediary of two connecting rods 9 and 10 - Fig. 2 with two in opposite directions of rotation Dr1 and Dr2 and parallel to each other extending crankshafts 11 and 12 are in operative connection. The crankshafts 11 and 12 are arranged upright to a waterline WI of the boat 3 and drive one below the waterline WI - Fig. 1 - acting boot bolt 13 on. On a side facing away from the boat screw 13 at 14, the crankshafts 11 and 12 are provided with flywheels 15 and 16, which overlap partially to save space - Fig.1 -.

Ein Brennkraftmaschinengehäuse 17 der Brennkraftmaschine 1 setzt sich aus einem die Kurbelwellen 11 und 12 aufnehmenden Zylinderkurbelgehäuse 18 und einem zur Unterbringung von Ein- und Auslassventilen 19 und 20 und Nockenwellen 21 und 22 dienenden Zylinderkopf 23. Das Brennkraftmaschinengehäuse 17 wird von einer oberen Stirnseite StO -Fig.1- und einer unteren Stirnseite StU begrenzt. Und die Brennkraftmaschine 1 arbeitet nach dem Diesel Einspritzverfahren, wobei zur Verbesserung des Drehmomentverlaufs, des Kraftstoffverbrauchs und der Abgasemissionswerte eine Abgasturboladereinrichtung 24 vorgesehen ist, die an der oberen Stirnseite StO angebracht ist. Die Abgasturboladereinrichtung 24 -Fig. 1-wird gebildet durch eine Abgasturbine 25 und einen Verdichter 26 der an ein Ansaugsystem 27 -Fig. 3 und 6- der Brennkraftmaschine 1 angeschlossen ist.An engine housing 17 of the internal combustion engine 1 is composed of a cylinder crankcase 18 accommodating the crankshafts 11 and 12 and a cylinder head 23 serving to accommodate intake and exhaust valves 19 and 20 and camshafts 21 and 22. The engine housing 17 is exposed from an upper end face StO. Fig.1 - And a lower end face StU limited. And the internal combustion engine 1 operates according to the diesel injection method, with an exhaust gas turbocharger device 24 being provided on the upper end side StO for improving the torque curve, the fuel consumption and the exhaust gas emission values. The exhaust gas turbocharger device 24 - Fig. 1- is formed by an exhaust gas turbine 25 and a compressor 26 connected to an intake system 27. Fig. 3 and 6 - The internal combustion engine 1 is connected.

Das Brennkraftmaschinengehäuse 17 ist mit einem Entlüftungssystem 28 versehen, das einen Ölvorabscheider 29 sowie einen Ölhauptabscheider 30 aufweisende Ölabscheideeinrichtung 31 -Fig. 3- besitzt, über die beim Betrieb der Brennkraftmaschine 1, in einem Kurbelraum 32 des Zylinderkurbelgehäuses 18 entstehendes Öl-Leckgas-Gemisch. Das Öl-Leckgas-Gemisch ergibt sich durch Vermengung von selbst bei optimaler Abdichtung zwischen Kolbenmantel Km und Zylinderwand Zw -Fig. 2- hindurchtretendes Gas -auch Blow-By-Gas genannt- und kleinere und größeren Öltropfen, die die Bewegungen der Kurbelwellen 11 und 12 sowie der Pleuel 9 und 10 im Kurbelraum verursachen.The engine casing 17 is provided with a venting system 28 having an oil separator 29 and an oil separator 30 having an oil main separator 30. Fig. 3 - Has, over the during operation of the internal combustion engine 1, in a crank chamber 32 of the cylinder crankcase 18 resulting oil leakage gas mixture. The oil-leak gas mixture results from mixing even with optimum sealing between piston skirt Km and cylinder wall Zw - Fig. 2 - Gas passing through-also called blow-by gas- and smaller and larger oil drops that cause the movements of the crankshafts 11 and 12 and the connecting rods 9 and 10 in the crankcase.

Das Öl-Leckgas-Gemisch gelangt aufgrund der im Kurbelraum 32 herrschenden Druckverhältnisse unter Vermittlung einer benachbart der oberen Stirnseite StO sich erstreckenden Abführungsleitung 33 in den Ölvorabscheider 29 gelangt, von wo aus besagtes Öl-Leckgas-Gemisch in den Ölhauptabscheider 30 geleitet wird. In dem Ölhauptabscheider 30 wird dieses Gemisch in die Bestandteile Öl und Leckgas getrennt, wobei das Öl in eine an die untere Stirnseite StU anschließende Ölwanne 34 und das Leckgas in der Nähe der oberen Stirnseite StO in das Ansaugsystem 27 bzw.in den Verdichter 25 strömt. Die Abführungsleitung 33 wird durch ein Rohrelement 35 gebildet, das außerhalb des Brennkraftmaschinengehäuses 17 entlang der oberen Stirnseite-StO verlegt ist.Due to the pressure conditions prevailing in the crankcase 32, the oil-leak gas mixture passes through the intermediary of a discharge line 33 extending adjacent the upper end face StO into the oil pre-separator 29, from where said oil-leakage gas mixture is conducted into the main oil separator 30. In the main oil separator 30, this mixture is separated into the components oil and gas leakage, wherein the oil flows into a subsequent to the lower end side StU oil pan 34 and the leak gas in the vicinity of the upper end face StO in the intake 27 andin the compressor 25. The discharge line 33 is formed by a pipe member 35 which is laid outside the engine casing 17 along the upper end-StO.

Ein Öl-Leckgas-Gemisch in einem Ventil-Nockenwellengebiet VN-G, das auf ähnliche Weise wie das Öl-Leckgas-Gemisch im Kurbelraum 32 entsteht strömt benachbart der in den Ölvorabscheider 29 mündenden Abführungsleitung 33 bzw. 35 über einen ersten Durchgang 36 zwischen Zylinderkopf 23 und Ölvorabscheider 29 in letzteren ein.An oil-leak gas mixture in a valve camshaft area VN-G, which arises in a manner similar to the oil-leak gas mixture in the crank chamber 32, flows adjacent to the discharge line 33 or 35 opening into the oil pre-separator 29 via a first passage 36 between the cylinder head 23 and oil pre-separator 29 in the latter a.

Der Ölvorabscheider 29 umfasst aufrecht zu Wasserlinie WI sich erstreckende erste und zweite Leitkammern 37 und 38, zwischen denen ein flaches Leitelement 39 verläuft. In das Leitelement 39 ist zum Durchströmen des Öl-Leckgas-Gemischs zwischen erster und zweite Leitkammer 37 und 38 ein zweiter Durchgang 40 vorgesehen ist. Die Leitkammern 37 und 38 sowie das Leitelement 39 erstrecken sich über eine wesentliche Länge Lzy des Zylinderkopfs 23, wobei der zweite Durchgang 40 benachbart der unteren Stirnseite StU in das Leitelement 39 eingearbeitet ist. Das Öl-Leckgas-Gemisch in der ersten Leitkammer 37 wird von oben nach unten zwischen der oberen Stirnseite StO und der unteren Stirnseite StU entlang des Leitelements 39 geführt und tritt durch den zweiten Durchgang 40 in die zweite Leitkammer 38 ein, über die besagtes Öl-Leckgas-Gemisch in Richtung obere Stirnseite StO strömt und von dort unter Zwischenschaltung eines dritten Durchgangs 41 in den Ölhauptabscheider 30 gelangt. Das bei dieser Steuerung des Öl-Leckgas-Gemisches entzogene Öl fließt über einen vierten Durchgang 42 in die Ölwanne 34 zurück.The Ölvorabscheider 29 comprises upright to the water line WI extending first and second guide chambers 37 and 38, between which a flat guide element 39 extends. In the guide element 39 is for flowing through the oil-leakage gas mixture between the first and second guide chambers 37 and 38, a second passage 40th is provided. The guide chambers 37 and 38 and the guide element 39 extend over a substantial length Lzy of the cylinder head 23, wherein the second passage 40 adjacent to the lower end face StU is incorporated into the guide element 39. The oil-leak gas mixture in the first guide chamber 37 is guided from top to bottom between the upper end side StO and the lower end side StU along the guide element 39 and enters through the second passage 40 in the second guide chamber 38, via said oil Leakage gas mixture in the direction of the upper end face StO flows and from there with the interposition of a third passage 41 into the main oil separator 30 passes. The extracted in this control of the oil-leakage gas mixture oil flows through a fourth passage 42 in the oil pan 34 back.

Der Ölvorabscheiders 29 und der Ölhauptabscheider 30 sind zu einer Gehäusestruktur 43 zusammengefasst, von der zumindest der Ölhauptabscheider 30 unter Vermittlung von Halteschrauben 44 und 45 am Zylinderkopf 23 in Lage gehalten wird. Der Ölvorabscheider 29 ist im Ausführungsbeispiel -Fig. 4- aus einem Stück mit dem Zylinderkopf 23 hergestellt. Denkbar ist aber auch den Ölvorabscheider 29 getrennt vom Zylinderkopf 23 zu gestalten. Darüber hinaus ist der Ölvorabscheider 29 und der Ölhauptabscheider 30 unter Zwischenschaltung eines ringförmigen Distanzkörpers 46 an Verbindungsebenen Ve1 und Ve2 zusammengesetzt. Diese Bauteilkonfiguration ermöglicht eine bedarfsgerechte Volumenauslegung -VI, VII und VII- des Ölvorabscheiders 29, des Distanzkörpers 46 und des Ölhauptabscheiders 30 für eine definierte Behandlung des Öl-Leckgas-Gemischs. Der Ölvorabscheider 29, der Distanzkörper 46 und der Ölhauptabscheider 30 sind über ein oder mehrere Verbindungsschrauben 47 vereint. Die Verbindungsschrauben 47 sind benachbart einer Randzone 48 der Gehäusestruktur 43 etwa senkrecht zu den Verbindungsebenen Ve1 und Ve2 wirksam. Unterhalb der einer oder mehreren der Verbindungsschrauben 47 verläuft eine Außenkontur 49 einer Ansaugluftkanalhaube 50. Ausserdem ist der Ölhauptabscheider 30 nach Art eines Deckels 51 der Gehäusestruktur 43 bzw. des Ölhauptabscheiders 30 ausgeführt, der mit einem umlaufenden Anschlussrand 52 an den Distanzkörper 46 herangeführt ist.The Ölvorabscheiders 29 and the Ölhauptabscheider 30 are combined to form a housing structure 43, of which at least the main oil separator 30 by means of retaining screws 44 and 45 is held on the cylinder head 23 in position. The oil pre-separator 29 is in the embodiment - Fig. 4 - Made in one piece with the cylinder head 23. It is also conceivable, however, to design the oil pre-separator 29 separately from the cylinder head 23. In addition, the Ölvorabscheider 29 and the main oil separator 30 with the interposition of an annular spacer 46 at connection levels Ve1 and Ve2 is composed. This component configuration enables a demand-based volume design -VI, VII and VII- of the oil pre-separator 29, the spacer 46 and the main oil separator 30 for a defined treatment of the oil-leakage gas mixture. The oil pre-separator 29, the spacer body 46 and the oil main separator 30 are united via one or more connecting screws 47. The connecting bolts 47 are effective adjacent to a peripheral zone 48 of the housing structure 43 approximately perpendicular to the connecting planes Ve1 and Ve2. Below the one or more of the connecting screws 47 extends an outer contour 49 of a Ansaugluftkanalhaube 50. In addition, the Ölhauptabscheider 30 is designed in the manner of a cover 51 of the housing structure 43 and the Ölhauptabscheiders 30 which is introduced with a peripheral connecting edge 52 to the spacer body 46.

Der Ölhauptabscheider 30 ist mit einem Labyrinth 53 versehen- Fig. 3 und Fig. 6 , an dem das Öl-Leckgas-Gemisch vorbeigeführt wird, wodurch zum einen das Leckgas zum Ansaugsystem 27 und zum anderen das Öl zur Ölwanne 34 hin geleitet wird. Das Labyrinth 53 ist an einer Innenseite 54 des Deckels 51 angebracht, und es wird durch beabstandeten Leitstegen 55, 56 und 57, 58 gebildet, die von gegenüberliegenden aufrechten Seiten 59 und 60 aus sich quer zu einer Längsrichtung Lr und mit einem definierten Neigungswinkel erstrecken. Dabei greifen die Leitstege 55, 56 bzw. 57, 58 wechselweise ineinander, und können gewölbt sein. Mit den so ausgelegten an Leitstegen 55, 56 bzw. 57, 58 wir erreicht, dass das separiertes Öl durch ein Abführkanalsystem 61 und einen fünften Durchgang 62 in die Ölwanne 34 kanalisiert wird.The oil main separator 30 is provided with a labyrinth 53- Fig. 3 and Fig. 6 , where the oil-leakage gas mixture is passed, whereby on the one hand, the leak gas to the intake 27 and on the other hand, the oil is led to the oil pan 34 out. The labyrinth 53 is mounted on an inner side 54 of the lid 51 and is formed by spaced guide ribs 55, 56 and 57, 58 extending from opposite upright sides 59 and 60 transversely to a longitudinal direction Lr and at a defined angle of inclination. In this case, the guide webs 55, 56 and 57, 58 alternately interlock, and may be curved. With the guide ribs 55, 56 and 57, 58 designed in this way, we have achieved that the separated oil is channeled through a discharge channel system 61 and a fifth passage 62 into the oil sump 34.

Claims (15)

  1. Internal combustion engine of the reciprocating type, for example in the form of an outboard motor for a boat, comprising at least one reciprocating piston, which is operatively connected by means of two connecting rods having two crankshafts rotating in opposite directions and running parallel to one another, which crankshafts are oriented in an upright manner tot a horizontal waterline of the boat, wherein an internal combustion engine housing of the internal combustion engine is made up of at least a cylinder crank housing and a cylinder head having inlet and outlet valves and is bounded by an upper end face and a bottom end face characterized in that the internal combustion engine (1) has a joint ventilation system (28) with the internal combustion engine housing (17) which has an oil separating device (31) with an oil pre-separator (29) and a main oil separator (30), via which during operation of the internal combustion engine (1) a mixture of oil and leaking gas reaches, resulting for example in a crank case (32) of the cylinder crank housing (18) by way of a discharge line (33) extending adjacent to the upper end face (StO), the oil pre-separator (29), from where said mixture of oil and leaking gas is guided into the main oil separator (30) and there is separated into the components of oil and leaking gas, which oil flows into an oil pan (34) connecting at the bottom end face (StU) and which leaking gas flows near the upper end face (StO) into an intake system (27) of the internal combustion engine.
  2. The internal combustion engine according to Claim 1, characterized in that the discharge line (33) is formed by a tube element (35) which is placed outside of the internal combustion engine housing (17) alongside the upper end face (StO).
  3. The internal combustion engine according to Claim 1, wherein the mixture of oil and leaking gas flows from a valve-camshaft area (VN-G) of the cylinder head (23), adjacent to the discharge line (33; 35) running into the oil pre-separator (23), via a first passageway (36) between cylinder head (23) and oil pre-separator (29) into said oil pre-separator.
  4. Internal combustion engine according to Claims 1 and 3, characterized in that the oil pre-separator (29) comprises at least first and second upright guiding chambers (37 and 38) and are, at least in some areas, separated by a guiding element (39), in which a second passageway (40) is provided for through-flowing the mixture of oil and leaking gas.
  5. The internal combustion engine according to claim 4, characterized in that the guiding chambers (37 and 38) and the guiding element (39) of the oil pre-separator (29) extend over a substantial length (Lzy) of the cylinder head (23), wherein the second passageway (40) is situated between the chambers (37 and 38) adjacent to the bottom end face (StU) of the internal combustion engine housing (7).
  6. The internal combustion engine according to Claims 4 and 5, characterized in that the mixture of oil and leaking gas in the first guiding channel (37) is guided from the top to the bottom between the upper end face (StO) and the bottom end face (StU) alongside the guiding element (39) and enters through the second passageway (40) and the second chamber (38), via which said mixture of oil and leaking gas flows in the direction of the upper end face (StO) and from there reaches the main oil separator (30) by inter-positioning a third passageway (41).
  7. The internal combustion engine according to Claims 1, 4 and 5, characterized in that the oil pre-separator (29) and the main oil separator (30) are combined into a housing structure (43).
  8. The internal combustion engine according to Claim 7, characterized in that the housing structure (43) is, by way of holding screws (45), held in position, at the cylinder head (23) of the internal combustion engine housing (17).
  9. The internal combustion engine according to Claims 7 and 8, characterized in that the oil pre-separator (29) and the main oil separator (30) are, by inter-positioning a spacer (46), put together I such a manner that connecting planes (Ve1 and Ve2) run between the oil pre-separator (29) and the spacer (46), and between the spacer (46) and the main oil separator (30).
  10. The internal combustion engine according to Claim 9, characterized in that the oil pre-separator (29), the spacer (46) and the main oil separator (30) of the housing structure (43) are put together by one or a plurality of connecting screws (47).
  11. The internal combustion engine according to Claims 9 and 10, characterized in that the connecting screws (47) adjacent to a rim zone (48) of the housing structure (43) act approximately perpendicular to the connecting planes (Ve1 and Ve2).
  12. The internal combustion engine according to one or more of the preceding Claims, characterized in that the main oil separator (30) is configured as a type of a lid (51), which is led up to the spacer (46) by a circumferential connecting rim (52).
  13. The internal combustion engine according to one or more of the preceding Claims, characterized in that the main oil separator (30) is provided with a labyrinth (53), along which the mixture of oil and leaking gas is guided, as a result of which, on one hand, the gas is separated in the direction of the intake system (27) and, on the other hand the oil is separated in the direction of the oil pan (34).
  14. The internal combustion engine according to Claim 13, characterized in that the labyrinth (53) has guide webs (55, 56, 57, 58) spaced apart from one another, which, starting from upright, opposite sides (59, 60), interlock in an alternating manner and which are arranged in such a way that separated oil of the mixture of oil and leaking gas is guided by a discharge duct system (61) in the direction of the oil pan (34).
  15. The internal combustion engine according to Claims 12 and 14, characterized in that the labyrinth (53) is mounted to an interior side (54) of the lid (51).
EP15002144.2A 2014-07-30 2015-07-20 Ventilation device with oil separator Active EP2980374B1 (en)

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JP2016033371A (en) 2016-03-10
US20160032819A1 (en) 2016-02-04
EP2980374A1 (en) 2016-02-03
US9777625B2 (en) 2017-10-03
JP6555962B2 (en) 2019-08-07

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