EP2788596A1 - Internal combustion engine and method for operating an internal combustion engine - Google Patents

Internal combustion engine and method for operating an internal combustion engine

Info

Publication number
EP2788596A1
EP2788596A1 EP12799157.8A EP12799157A EP2788596A1 EP 2788596 A1 EP2788596 A1 EP 2788596A1 EP 12799157 A EP12799157 A EP 12799157A EP 2788596 A1 EP2788596 A1 EP 2788596A1
Authority
EP
European Patent Office
Prior art keywords
crankcase
gas
internal combustion
combustion engine
oil
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.)
Granted
Application number
EP12799157.8A
Other languages
German (de)
French (fr)
Other versions
EP2788596B1 (en
Inventor
Timm BRÖCKER
Hans Bennecke
Ralf Siemer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP2788596A1 publication Critical patent/EP2788596A1/en
Application granted granted Critical
Publication of EP2788596B1 publication Critical patent/EP2788596B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil

Definitions

  • the invention relates to a method for operating an internal combustion engine in which a fine oil mist-containing blowby flow is removed by a gas recirculation device from a crankcase and the charge air is supplied, wherein the blowby flow is treated when passing through an arranged in the gas recirculation oil separator.
  • crankcase Under blowby is understood in an internal combustion engine, also called internal combustion engine or piston engine, which in the compression of the piston rings from the working space in the engine room bypassing gas. During compression, unburned fuels penetrate into the crankcase. During the combustion cycle hot and often contaminated with aggressive pollutants gas enters the crankcase. Due to a permanent influence of the blowby gas, the engine oil can be heavily loaded. To reduce this load and the gas pressure in the crankcase, the crankcase is vented. The venting is usually via a gas recirculation device, which via a
  • Gas outlet is connected to the crankcase.
  • the gas recovery device directs the blowby gas mostly to the air filter box or to another point of the
  • Crankcase also entrained oil drops.
  • this can cause severe contamination of the components, such as throttle valve, turbocharger or valves.
  • contamination with oil can lead to performance losses and disruptions.
  • a device for treating the blow-by gas in particular an oil separator, is arranged in the gas recycling device.
  • passive oil separators such as inertial separators, are used. These are inexpensive, robust and low maintenance.
  • the individual oil drops in the blowby gas must not have a minimum body diameter
  • Piston cooling nozzles Oltropfen sprayed to the piston head Piston cooling nozzles Oltropfen sprayed to the piston head.
  • the invention has the object, a method of the type mentioned in such a way that the amount of entrained oil, especially small Oltropfen in the blowby flow, as much as possible before entering the blow-by flow in the fresh gas side of the engine becomes.
  • a method in which a coarse oil mist is moved into the blowby flow before and / or during the treatment in the oil separator.
  • a coarse oil mist By entering and moving large drops of oil in the blowby flow, small drops of oil in the blowby flow are bound to the large drops of oil. At the same time, the small drops of oil attach themselves to the large ones.
  • the large oil droplets can be easily and effectively separated from the blowby flow with passive oil separators, such as deflector plates or baffle plates.
  • the fine oil mist consists of small Oltropfen with a body diameter less than ten microns.
  • the coarse oil mist is made up of large oil drops whose body diameter is greater than or equal to ten microns. According to the fine oil mist is thrown with large Oltropfen.
  • the small drops of oil from the fine oil mist agglomerate on these large drops of oil.
  • an internal combustion engine is further provided, wherein in the
  • a spraying device for generating a coarse oil mist is arranged.
  • an internal combustion engine is furthermore provided, in which guide elements for forming and maintaining a gas cylinder are arranged in the crankcase are.
  • the gas roller is suitable for generating and / or accelerating a Grobolnebel.
  • crankcase in particular before and / or during the discharge of the blow-by flow from the crankcase, is moved into the blowby flow. This makes it possible to use internal engine measures for generating and accelerating the large oil droplets and / or to exploit internal engine effects.
  • the Grobolnebel is generated and / or accelerated by a moving in the crankcase to the crankshaft of the internal combustion engine gas roller.
  • the movement of the crankshaft creates a gas roller in the crankcase.
  • These large drops of oil are lifted, for example, from the crankshaft, from the inner wall of the crankcase, from the connecting rod or specially shaped guide elements or entrained when crossing the crankcase. Oil droplets traverse the crankcase as they drip or hurl gravity into the interior of the crankcase or are thrown into it.
  • the inertial forces acting on the large oil droplets cause them to be ejected from the gas cylinder. They leave the gas roller in a direction which is approximately tangential to the rotational movement of the gas cylinder and which is oriented in the direction of rotation of the gas cylinder.
  • a gas outlet opening for the blowby flow is arranged in the crank chamber so that the large oil droplets penetrate into the blowby flow when leaving the gas cylinder.
  • the fine oil mist is thrown with large drops of oil, whereby the small drops of oil are bound.
  • the Grobolnebel is moved in the blowby flow largely parallel to the blowby flow. This results in a long residence time of the coarse oil mist in the blowby flow, which allows many of the small oil droplets to agglomerate on the large oil droplets.
  • guide elements are arranged in the crankcase, which promote a circulation of the gas volume around the crankshaft.
  • the guide elements are concavely curved toward the crankshaft or arranged along a track concavely curved towards the crankshaft.
  • oil planer and baffle are designed, which the oil pan of the
  • a further advantageous embodiment of the invention is that the Grobolnebel is generated and / or accelerated by means of a spray device.
  • the spray device for generating large drops of oil is preferably arranged in the crankcase.
  • the spray device is directed to the blowby flow and / or gas outlet.
  • the spraying device outside the crankcase, for example in the oil separator or behind the gas outlet opening, directed towards the crankcase.
  • Fig. 1 is a schematic representation of a first embodiment of an internal combustion engine
  • Fig. 2 is a schematic representation of a first design variant of a second
  • Fig. 3 is a schematic representation of a second design variant of a second
  • Fig. 4 is a schematic representation of the principle underlying the invention.
  • Figures 1, 2 and 3 show an internal combustion engine 1 with a crankcase 2, in which a crankshaft 3 is arranged to be movable about a rotation axis, not shown.
  • the crankcase 2 is limited in the configuration of the internal combustion engine 1 shown here on one side by an oil pan 4 and on the other side by a cylinder 5.
  • the invention may also be applied to other configurations of an internal combustion engine 1, such as a V-type engine or a Boxer engine.
  • a piston 6 is arranged translationally movable.
  • the piston 6 closes the working space 7 of the internal combustion engine 1 with respect to the crankcase 2.
  • a connecting rod 8 also referred to as a drive rod, the piston 6 and the crankshaft 3 are connected.
  • Blowby gas which passes past the piston 6 into the crankcase 2, is indicated by means of small arrows as a blowby flow 10.
  • the blowby flow 10 is via a Gas return device 1 1 of the not shown fresh gas side of the internal combustion engine 1 fed.
  • a channel cross-section 12 is indicated and an oil separator 13 is shown.
  • the gas recycling device 1 1 is over a
  • Crankcase 2 vanes 14 arranged, for example, a baffle or an oil planer.
  • oil separated from the blowby flow 10 flows via an oil return 18 into the oil sump 4.
  • Figure 1 shows a first embodiment of the internal combustion engine 1.
  • Embodiment is formed by the rotational movement of the crankshaft 3 and due to the arrangement and shape of the guide elements 14 in the crankcase 2, a gas roller 15 and maintained.
  • the gas cylinder 15 is indicated by a large arrow.
  • Coarse oil mist 16 is indicated by a thick, black arrow and is further explained in Figure 4.
  • the small oil droplets in the blow-by flow 10 form a fine oil mist 17 shown in more detail in FIG. 4.
  • the small oil droplets deposit on the large oil droplets.
  • the large oil drops can easily and effectively in the passive oil separator 13 from the blow-by flow 10th
  • Figures 2 and 3 show two design variants of a second embodiment of the internal combustion engine 1.
  • crankcase 2 a in the crankcase 2 a
  • Spray device 19 arranged to produce a coarse oil mist 16.
  • the first design variant is shown.
  • the spray device 19 is on one of
  • FIG. 4 shows a schematic representation of the principle underlying the invention.
  • a coarse oil mist 16 is moved by a fine oil mist 17.
  • the coarse oil mist 16 consists of numerous large Oltropfen whose body diameter is greater than or equal to ten microns.
  • Movement direction 20 of the coarse oil mist 16 is indicated by means of an arrow group.
  • coarse oil mist 16 and fine oil mist 17 meet the small Oltropfen agglomerate on the large Oltropfen.

Abstract

The invention relates to a method for operating an internal combustion engine (1) in which a blow-by stream (10) containing a fine oil mist is discharged from a crankcase (2), and supplied to the charge-air side of the internal combustion engine (1), by means of a gas recirculation device (11), wherein the blow-by stream (10) is treated as it passes through an oil separator (13) arranged in the gas recirculation device (11) and, before and/or during the treatment in the oil separator (13), a coarse oil mist (16) is moved into the blow-by stream (10). The invention also relates to an internal combustion engine (1) having a crankcase (2) which is connected via a gas outlet opening (9) to a gas recirculation device (11), and in which, in the crankcase (2), there are arranged guide elements (14) for generating and maintaining a gas circulation (15). The invention finally relates to an internal combustion engine (1) having a crankcase (2) which is connected via a gas outlet opening (9) to a gas recirculation device (11), and in which a spray device for generating a coarse oil mist (16) is arranged in the crankcase (2) and/or in the gas recirculation device (11).

Description

Beschreibung  description
Brennkraftmaschine und Verfahren zum Betrieb einer Brennkraftmaschine Internal combustion engine and method for operating an internal combustion engine
Die Erfindung betrifft ein Verfahren zum Betrieb einer Brennkraftmaschine, bei dem eine Feinölnebel enthaltende Blowby-Strömung durch eine Gasrückführeinrichtung aus einem Kurbelgehäuse abgeführt und der Ladeluft zugeführt wird, wobei die Blowby-Strömung beim Passieren eines in der Gasrückführeinrichtung angeordneten Ölabscheiders aufbereitet wird. The invention relates to a method for operating an internal combustion engine in which a fine oil mist-containing blowby flow is removed by a gas recirculation device from a crankcase and the charge air is supplied, wherein the blowby flow is treated when passing through an arranged in the gas recirculation oil separator.
Unter Blowby versteht man bei einer Brennkraftmaschine, auch Verbrennungsmotor oder Kolbenmaschine genannt, das bei der Kompression an den Kolbenringen vom Arbeitsraum in den Triebwerksraum vorbeiströmende Gas. Bei der Kompression dringen unverbrannte Kraftstoffe in das Kurbelgehäuse. Während des Verbrennungstaktes gelangt heißes und oft mit aggressiven Schadstoffen verunreinigtes Gas in das Kurbelgehäuse. Durch eine dauerhafte Einwirkung des Blowby-Gases kann das Motoröl stark belastet werden. Um diese Belastung und den Gasdruck im Kurbelgehäuse zu reduzieren, wird das Kurbelgehäuse entlüftet. Die Entlüftung erfolgt in der Regel über eine Gasrückführeinrichtung, welche über eine Under blowby is understood in an internal combustion engine, also called internal combustion engine or piston engine, which in the compression of the piston rings from the working space in the engine room bypassing gas. During compression, unburned fuels penetrate into the crankcase. During the combustion cycle hot and often contaminated with aggressive pollutants gas enters the crankcase. Due to a permanent influence of the blowby gas, the engine oil can be heavily loaded. To reduce this load and the gas pressure in the crankcase, the crankcase is vented. The venting is usually via a gas recirculation device, which via a
Gasauslassöffnung mit dem Kurbelgehäuse verbunden ist. Die Gasrückführeinrichtung leitet das Blowby-Gas meistens zum Luftfilterkasten oder zu einer anderen Stelle der Gas outlet is connected to the crankcase. The gas recovery device directs the blowby gas mostly to the air filter box or to another point of the
Frischgaszufuhr. Zusätzlich zu den Schadstoffen werden bei der Entlüftung des Fresh gas supply. In addition to the pollutants are used in the ventilation of the
Kurbelgehäuses auch Öltropfen mitgerissen. Durch die Einleitung des Blowby-Gases in den Ansaugtrakt kann hierdurch eine starke Verschmutzung der Komponenten, wie beispielsweise Drosselklappe, Turbolader oder Ventile, hervorgerufen werden. Besonders bei dem Turbolader und dem Ladeluftkühler kann eine Verschmutzung mit Öl zu Leistungseinbußen und Störungen führen. Crankcase also entrained oil drops. By introducing the blow-by gas into the intake tract, this can cause severe contamination of the components, such as throttle valve, turbocharger or valves. Especially with the turbocharger and the charge air cooler, contamination with oil can lead to performance losses and disruptions.
Zur Trennung der Öltropfen von dem Blowby-Gas ist in der Gasrückführeinrichtung eine Einrichtung zur Aufbereitung des Blowby-Gases, insbesondere ein Ölabscheider, angeordnet. Vorzugsweise werden passive Ölabscheider, wie Trägheitsabscheider, verwendet. Diese sind kostengünstig, robust und wartungsarm. Damit ein Trägheitsabscheider funktioniert, dürfen die einzelnen Öltropfen in dem Blowby-Gas einen minimalen Körperdurchmesser nicht For separating the oil droplets from the blow-by gas, a device for treating the blow-by gas, in particular an oil separator, is arranged in the gas recycling device. Preferably, passive oil separators, such as inertial separators, are used. These are inexpensive, robust and low maintenance. For an inertial separator to work, the individual oil drops in the blowby gas must not have a minimum body diameter
unterschreiten. Kleine Öltropfen haben eine zu kleine Masse, um in einem Trägheitsabscheider vom Gasstrom getrennt werden zu können. Moderne Brennkraftmaschinen arbeiten mit hohen Verbrennungstemperaturen. Um dabei eine leistungsfähige Kühlung und Schmierung des Kolbens zu erreichen, werden mittels below. Small drops of oil have too small a mass to be separated from the gas stream in an inertial separator. Modern internal combustion engines operate at high combustion temperatures. In order to achieve a powerful cooling and lubrication of the piston, are by means of
Kolbenkühldüsen Oltropfen an den Kolbenboden gespritzt. Piston cooling nozzles Oltropfen sprayed to the piston head.
Eine Brennkraftmaschine mit einer Öl-Luft-Abscheideeinrichtung ist aus der Druckschrift DE 10 2006 035 888 A1 bekannt. Die Öl-Luft-Abscheideeinrichtung hat ein im Wesentlichen zylindrisches Gehäuse, an dessen innerer Wandung sich das eintretende Öl aufgrund der Zentrifugalkraft entlang bewegt. An internal combustion engine with an oil-air separation device is known from the document DE 10 2006 035 888 A1. The oil-air separation device has a substantially cylindrical housing, on the inner wall of which the incoming oil moves due to the centrifugal force.
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art derart auszuführen, dass die Menge des mitgeführten Öls, insbesondere kleiner Oltropfen in der Blowby-Strömung, vor dem Eintritt der Blowby-Strömung in die Frischgasseite der Brennkraftmaschine möglichst stark reduziert wird. Against this background, the invention has the object, a method of the type mentioned in such a way that the amount of entrained oil, especially small Oltropfen in the blowby flow, as much as possible before entering the blow-by flow in the fresh gas side of the engine becomes.
Diese Aufgabe wird gelöst mit einem Verfahren gemäß den Merkmalen des Patentanspruchs 1. Die Unteransprüche betreffen besonders zweckmäßige Weiterbildungen der Erfindung. This object is achieved by a method according to the features of patent claim 1. The subclaims relate to particularly expedient developments of the invention.
Erfindungsgemäß ist also ein Verfahren vorgesehen, bei dem vor und/oder während der Aufbereitung in dem Ölabscheider ein Grobölnebel in die Blowby-Strömung bewegt wird. Durch das Eingetragen und Bewegen von großen Oltropfen in der Blowby-Strömung werden kleine Oltropfen in der Blowby-Strömung an die großen Oltropfen gebunden. Dabei lagern sich die kleinen Oltropfen an den großen an. Die großen Oltropfen können einfach und effektiv mit passiven Ölabscheidern, wie beispielsweise Umlenk- oder Prallplatten, aus der Blowby- Strömung abgeschieden werden. Der Feinölnebel besteht aus kleinen Oltropfen mit einem Körperdurchmesser kleiner zehn Mikrometer. Der Grobölnebel ist aus großen Oltropfen aufgebaut, deren Körperdurchmesser größer oder gleich zehn Mikrometer ist. Erfindungsgemäß wird der Feinölnebel mit großen Oltropfen beworfen. An diesen großen Oltropfen agglomerieren die kleinen Oltropfen des Feinölnebels. According to the invention, therefore, a method is provided in which a coarse oil mist is moved into the blowby flow before and / or during the treatment in the oil separator. By entering and moving large drops of oil in the blowby flow, small drops of oil in the blowby flow are bound to the large drops of oil. At the same time, the small drops of oil attach themselves to the large ones. The large oil droplets can be easily and effectively separated from the blowby flow with passive oil separators, such as deflector plates or baffle plates. The fine oil mist consists of small Oltropfen with a body diameter less than ten microns. The coarse oil mist is made up of large oil drops whose body diameter is greater than or equal to ten microns. According to the fine oil mist is thrown with large Oltropfen. The small drops of oil from the fine oil mist agglomerate on these large drops of oil.
Erfindungsgemäß ist weiterhin eine Brennkraftmaschine vorgesehen, bei der in dem According to the invention, an internal combustion engine is further provided, wherein in the
Kurbelgehäuse und/oder in der Gasrückführeinrichtung eine Sprühvorrichtung zur Erzeugung eines Grobölnebels angeordnet ist. Crankcase and / or in the gas recycling device a spraying device for generating a coarse oil mist is arranged.
Erfindungsgemäß ist weiterhin auch eine Brennkraftmaschine vorgesehen, bei der in dem Kurbelgehäuse Leitelemente zur Ausbildung und Aufrechterhaltung einer Gaswalze angeordnet sind. Dabei ist die Gaswalze geeignet, einen Grobolnebel zu erzeugen und/oder zu beschleunigen. According to the invention, an internal combustion engine is furthermore provided, in which guide elements for forming and maintaining a gas cylinder are arranged in the crankcase are. The gas roller is suitable for generating and / or accelerating a Grobolnebel.
Eine Weiterbildung der Erfindung ist es, dass der Grobolnebel noch innerhalb des A development of the invention is that the Grobolnebel still within the
Kurbelgehäuses, insbesondere vor und/oder während des Abführens der Blowby-Strömung aus dem Kurbelgehäuse, in die Blowby-Strömung bewegt wird. Hierdurch ist es möglich, zur Erzeugung und zur Beschleunigung der großen Öltropfen innermotorische Maßnahmen einzusetzen und/oder innermotorische Effekte auszunutzen. Crankcase, in particular before and / or during the discharge of the blow-by flow from the crankcase, is moved into the blowby flow. This makes it possible to use internal engine measures for generating and accelerating the large oil droplets and / or to exploit internal engine effects.
Beispielsweise ist es vorteilhaft, dass der Grobolnebel von einer in dem Kurbelgehäuse um die Kurbelwelle der Brennkraftmaschine bewegten Gaswalze erzeugt und/oder beschleunigt wird. Durch die Bewegung der Kurbelwelle entsteht in dem Kurbelgehäuse eine Gaswalze. Diese reißt einzelne Öltropfen, insbesondere große Öltropfen, als Grobolnebel mit sich. Diese großen Öltropfen werden beispielsweise von der Kurbelwelle, von der Innenwand des Kurbelgehäuses, von der Pleuelstange oder speziell dafür geformten Leitelementen abgehoben oder beim Queren des Kurbelgehäuses mitgerissen. Öltropfen queren das Kurbelgehäuse, wenn sie der Schwerkraft folgend abtropfen oder in den Innenraum des Kurbelgehäuses hineinspritzen oder hineingeworfen werden. Die auf die großen Öltropfen wirkenden Trägheitskräfte führen jedoch dazu, dass diese aus der Gaswalze herausgeschleudert werden. Dabei verlassen sie die Gaswalze in einer Richtung, die annähernd tangential zur Drehbewegung der Gaswalze ist und die in Drehrichtung der Gaswalze orientiert ist. For example, it is advantageous that the Grobolnebel is generated and / or accelerated by a moving in the crankcase to the crankshaft of the internal combustion engine gas roller. The movement of the crankshaft creates a gas roller in the crankcase. This tears individual drops of oil, especially large oil drops, as Grobolnebel with it. These large drops of oil are lifted, for example, from the crankshaft, from the inner wall of the crankcase, from the connecting rod or specially shaped guide elements or entrained when crossing the crankcase. Oil droplets traverse the crankcase as they drip or hurl gravity into the interior of the crankcase or are thrown into it. However, the inertial forces acting on the large oil droplets cause them to be ejected from the gas cylinder. They leave the gas roller in a direction which is approximately tangential to the rotational movement of the gas cylinder and which is oriented in the direction of rotation of the gas cylinder.
Eine Gasauslassöffnung für die Blowby-Strömung ist in dem Kurbelraum so angeordnet, dass die großen Öltropfen beim Verlassen der Gaswalze in die Blowby-Strömung eindringen. So wird der Feinölnebel mit großen Öltropfen beworfen, wodurch die kleinen Öltropfen gebunden werden. Dabei hat es sich als vorteilhaft gezeigt, dass der Grobolnebel in der Blowby-Strömung weitestgehend parallel zu der Blowby-Strömung bewegt wird. Hierdurch ergibt sich eine lange Verweildauer des Grobölnebels in der Blowby-Strömung, wodurch viele der kleinen Öltropfen an den großen Öltropfen agglomerieren können. A gas outlet opening for the blowby flow is arranged in the crank chamber so that the large oil droplets penetrate into the blowby flow when leaving the gas cylinder. Thus, the fine oil mist is thrown with large drops of oil, whereby the small drops of oil are bound. It has proven to be advantageous that the Grobolnebel is moved in the blowby flow largely parallel to the blowby flow. This results in a long residence time of the coarse oil mist in the blowby flow, which allows many of the small oil droplets to agglomerate on the large oil droplets.
Um das Entstehen und Bestehen einer Gaswalze zu unterstützen, sind in dem Kurbelgehäuse Leitelemente angeordnet, die eine Umwälzung des Gasvolumens um die Kurbelwelle begünstigen. Dazu sind die Leitelemente zur Kurbelwelle hin konkav gekrümmt oder entlang einer zur Kurbelwelle hin konkav gekrümmten Spur folgend angeordnet. Als Leitelemente sind dabei auch Ölhobel und Schallblech ausgestaltet, welches die Ölwanne von dem In order to support the emergence and existence of a gas cylinder, guide elements are arranged in the crankcase, which promote a circulation of the gas volume around the crankshaft. For this purpose, the guide elements are concavely curved toward the crankshaft or arranged along a track concavely curved towards the crankshaft. As guiding elements while also oil planer and baffle are designed, which the oil pan of the
Kurbelgehäuse trennt. Eine weitere vorteilhafte Ausgestaltung der Erfindung ist es, dass der Grobolnebel mittels einer Sprühvorrichtung erzeugt und/oder beschleunigt wird. Die Sprühvorrichtung zur Erzeugung großer Öltropfen ist dazu bevorzugt in dem Kurbelgehäuse angeordnet. Idealerweise ist die Sprühvorrichtung auf die Blowby-Strömung und/oder die Gasauslassöffnung gerichtet. Durch den Einsatz einer Sprühvorrichtung ist es möglich, einen Grobolnebel konstanter Qualität und Quantität zu erzeugen, unabhängig von der Drehzahl der Kurbelwelle und somit auch unabhängig von einer Gaswalze und deren strömungsmechanischen Effekten. Es ist auch möglich, die Sprühvorrichtung außerhalb des Kurbelgehäuses anzuordnen, beispielsweise in dem Ölabscheider oder hinter der Gasauslassöffnung, gerichtet auf das Kurbelgehäuse. Crankcase separates. A further advantageous embodiment of the invention is that the Grobolnebel is generated and / or accelerated by means of a spray device. The spray device for generating large drops of oil is preferably arranged in the crankcase. Ideally, the spray device is directed to the blowby flow and / or gas outlet. Through the use of a spray device, it is possible to produce a Grobolnebel constant quality and quantity, regardless of the speed of the crankshaft and thus independent of a gas cylinder and their fluidic effects. It is also possible to arrange the spraying device outside the crankcase, for example in the oil separator or behind the gas outlet opening, directed towards the crankcase.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt in The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in
Fig. 1 eine schematische Darstellung einer ersten Ausführungsform einer Brennkraftmaschine; Fig. 1 is a schematic representation of a first embodiment of an internal combustion engine;
Fig. 2 eine schematische Darstellung einer ersten Gestaltungsvariante einer zweiten Fig. 2 is a schematic representation of a first design variant of a second
Ausführungsform der Brennkraftmaschine;  Embodiment of the internal combustion engine;
Fig. 3 eine schematische Darstellung einer zweiten Gestaltungsvariante einer zweiten Fig. 3 is a schematic representation of a second design variant of a second
Ausführungsform der Brennkraftmaschine;  Embodiment of the internal combustion engine;
Fig. 4 eine schematische Darstellung des der Erfindung zugrunde liegenden Prinzips. Fig. 4 is a schematic representation of the principle underlying the invention.
Die Figuren 1 , 2 und 3 zeigen eine Brennkraftmaschine 1 mit einem Kurbelgehäuse 2, in dem eine Kurbelwelle 3 um eine nicht dargestellte Drehachse bewegbar angeordnet ist. Das Kurbelgehäuse 2 ist in der hier dargestellten Konfiguration der Brennkraftmaschine 1 auf der einen Seite von einer Ölwanne 4 und auf der anderen Seite von einem Zylinder 5 begrenzt. Die Erfindung kann auch bei anderen Konfigurationen einer Brennkraftmaschine 1 , beispielsweise bei einem V-Motor oder einem Boxer-Motor, angewendet werden. In dem Zylinder 5 ist ein Kolben 6 translatorisch beweglich angeordnet. Der Kolben 6 verschließt den Arbeitsraum 7 der Brennkraftmaschine 1 gegenüber dem Kurbelgehäuse 2. Über eine Pleuelstange 8, auch als Treibstange bezeichnet, sind der Kolben 6 und die Kurbelwelle 3 verbunden. Blowby-Gas, welches an dem Kolben 6 vorbei in das Kurbelgehäuse 2 gelangt, ist mittels kleiner Pfeile als Blowby-Strömung 10 angedeutet. Die Blowby-Strömung 10 wird über eine Gasrückführeinrichtung 1 1 der nicht weiter dargestellten Frischgasseite der Brennkraftmaschine 1 zugeführt. Von der Gasrückführeinrichtung 1 1 ist lediglich ein Kanalquerschnitt 12 angedeutet und ein Ölabscheider 13 dargestellt. Die Gasrückführeinrichtung 1 1 ist über eine Figures 1, 2 and 3 show an internal combustion engine 1 with a crankcase 2, in which a crankshaft 3 is arranged to be movable about a rotation axis, not shown. The crankcase 2 is limited in the configuration of the internal combustion engine 1 shown here on one side by an oil pan 4 and on the other side by a cylinder 5. The invention may also be applied to other configurations of an internal combustion engine 1, such as a V-type engine or a Boxer engine. In the cylinder 5, a piston 6 is arranged translationally movable. The piston 6 closes the working space 7 of the internal combustion engine 1 with respect to the crankcase 2. About a connecting rod 8, also referred to as a drive rod, the piston 6 and the crankshaft 3 are connected. Blowby gas, which passes past the piston 6 into the crankcase 2, is indicated by means of small arrows as a blowby flow 10. The blowby flow 10 is via a Gas return device 1 1 of the not shown fresh gas side of the internal combustion engine 1 fed. Of the gas recycling device 1 1 only a channel cross-section 12 is indicated and an oil separator 13 is shown. The gas recycling device 1 1 is over a
Gasauslassöffnung 9 mit dem Kurbelgehäuse 2 verbunden. Weiterhin sind in dem Gas outlet 9 connected to the crankcase 2. Furthermore, in the
Kurbelgehäuse 2 Leitelemente 14 angeordnet, beispielsweise eine Schwallwand oder ein Ölhobel. In dem Ölabscheider 13 fließt von der Blowby-Strömung 10 getrenntes Öl über einen Ölrücklauf 18 in die Ölwanne 4 ab. Crankcase 2 vanes 14 arranged, for example, a baffle or an oil planer. In the oil separator 13, oil separated from the blowby flow 10 flows via an oil return 18 into the oil sump 4.
Figur 1 zeigt eine erste Ausführungsform der Brennkraftmaschine 1. Bei dieser Figure 1 shows a first embodiment of the internal combustion engine 1. In this
Ausführungsform wird durch die Drehbewegung der Kurbelwelle 3 beziehungsweise bedingt durch die Anordnung und Form der Leitelemente 14 in dem Kurbelgehäuse 2 eine Gaswalze 15 gebildet und aufrechterhalten. Die Gaswalze 15 ist durch einen großen Pfeil angedeutet. Durch die Bewegung der Gaswalze 15 werden große Öltropfen von den Oberflächen in dem Embodiment is formed by the rotational movement of the crankshaft 3 and due to the arrangement and shape of the guide elements 14 in the crankcase 2, a gas roller 15 and maintained. The gas cylinder 15 is indicated by a large arrow. By the movement of the gas roller 15, large drops of oil from the surfaces in the
Kurbelgehäuse 2 abgelöst. Derart abgelöste Öltropfen oder Öltropfen, die frei durch das Kurbelgehäuse 2 fallen, werden von der Gaswalze 15 mitgerissen, beschleunigt und verlassen diese aufgrund ihrer Trägheit wieder. Dabei werden die großen Öltropfen als Grobölnebel 16 in die Blowby-Strömung 10 geworfen. Diese Bewegung des Grobölnebels 16 in die Blowby- Strömung 10 hinein und zumindest streckenweise innerhalb der Blowby-Strömung 10 erfolgt vor und/oder während der Aufbereitung des Blowby-Gases in dem Ölabscheider 13. Der Crankcase 2 detached. Such detached oil drops or drops of oil that fall freely through the crankcase 2 are entrained by the gas cylinder 15, accelerated and leave them due to their inertia again. The large oil drops are thrown as coarse oil mist 16 in the blowby flow 10. This movement of the coarse oil mist 16 into the blow-by flow 10 and at least partially within the blow-by flow 10 takes place before and / or during the treatment of the blow-by gas in the oil separator 13
Grobölnebel 16 ist durch einen dicken, schwarzen Pfeil angedeutet und wird in Figur 4 weiter erläutert. Die kleinen Öltropfen in der Blowby-Strömung 10 bilden einen in Figur 4 näher dargestellten Feinölnebel 17. Bei dem Aufeinandertreffen von Grobölnebel 16 und Feinölnebel 17 lagern sich die kleinen Öltropfen an den großen Öltropfen an. Die großen Öltropfen können einfach und effektiv in dem passiven Ölabscheider 13 aus der Blowby-Strömung 10 Coarse oil mist 16 is indicated by a thick, black arrow and is further explained in Figure 4. The small oil droplets in the blow-by flow 10 form a fine oil mist 17 shown in more detail in FIG. 4. When coarse oil mist 16 and fine oil mist 17 meet, the small oil droplets deposit on the large oil droplets. The large oil drops can easily and effectively in the passive oil separator 13 from the blow-by flow 10th
abgeschieden werden. be deposited.
Die Figuren 2 und 3 zeigen zwei Gestaltungsvarianten einer zweiten Ausführungsform der Brennkraftmaschine 1. Bei dieser Ausführungsform ist in dem Kurbelgehäuse 2 eine Figures 2 and 3 show two design variants of a second embodiment of the internal combustion engine 1. In this embodiment, in the crankcase 2 a
Sprühvorrichtung 19 zur Erzeugung eines Grobölnebels 16 angeordnet. In Figur 2 ist die erste Gestaltungsvariante gezeigt. Bei dieser ist die Sprühvorrichtung 19 auf einer der Spray device 19 arranged to produce a coarse oil mist 16. In Figure 2, the first design variant is shown. In this, the spray device 19 is on one of
Gasauslassöffnung 9 gegenüberliegenden Seite des Kurbelgehäuses 2 angeordnet. Zugleich ist die Sprühvorrichtung 19 auf die Gausauslassöffnung 9 ausgerichtet, sodass der von ihr erzeugte Grobölnebel 16 das Kurbelgehäuse 2 im Bereich der Blowby-Strömung 10 quert. Bei der zweiten Gestaltungsvariante in Figur 3 ist die Sprühvorrichtung 19 im Bereich der Gas outlet 9 arranged opposite side of the crankcase 2. At the same time, the spray device 19 is aligned with the Gausauslassöffnung 9, so that the coarse oil mist 16 generated by it crosses the crankcase 2 in the region of the blowby flow 10. In the second embodiment variant in Figure 3, the spray device 19 in the region of
Gasauslassöffnung 9 angeordnet und auf den weiteren Verlauf der Gasrückführeinrichtung 1 1 , insbesondere den Ölabscheider 13 gerichtet. Figur 4 zeigt eine schematische Darstellung des der Erfindung zugrunde liegenden Prinzips. Ein Grobölnebel 16 wird durch einen Feinölnebel 17 bewegt. Der Grobölnebel 16 besteht aus zahlreichen großen Oltropfen, deren Körperdurchmesser größer oder gleich zehn Mikrometer ist. Der Feinölnebel 17, bestehend aus kleinen Oltropfen mit einem Körperdurchmesser kleiner zehn Mikrometer, ist dabei in beliebiger Richtung bewegt oder unbewegt. Die Gas outlet 9 arranged and directed to the further course of the gas recycling device 1 1, in particular the oil separator 13. Figure 4 shows a schematic representation of the principle underlying the invention. A coarse oil mist 16 is moved by a fine oil mist 17. The coarse oil mist 16 consists of numerous large Oltropfen whose body diameter is greater than or equal to ten microns. The fine oil mist 17, consisting of small Oltropfen with a body diameter less than ten microns, is moved in any direction or unmoved. The
Bewegungsrichtung 20 des Grobölnebels 16 ist mittels einer Pfeilgruppe angedeutet. Bei der Begegnung von Grobölnebel 16 und Feinölnebel 17 agglomerieren die kleinen Oltropfen an den großen Oltropfen. Movement direction 20 of the coarse oil mist 16 is indicated by means of an arrow group. When coarse oil mist 16 and fine oil mist 17 meet the small Oltropfen agglomerate on the large Oltropfen.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
Brennkraftmaschine Internal combustion engine
Kurbelgehäuse crankcase
Kurbelwelle crankshaft
Ölwanne oil pan
Zylinder Kolben Cylinder piston
Arbeitsraum working space
Pleuelstange connecting rod
Gasauslassöffnung gas outlet
Blowby-Strömung Gasrückführeinrichtung Blowby-flow gas recycling device
Kanalquerschnitt Channel cross section
Ölabscheider oil separator
Leitelement vane
Gaswalze Grobölnebel Gas roller coarse oil mist
Feinölnebel Fine oil mist
Ölrücklauf Oil return
Sprühvorrichtung sprayer
Bewegungsrichtung movement direction

Claims

Ansprüche claims
1. Verfahren zum Betrieb einer Brennkraftmaschine (1 ), bei dem einen Feinölnebel (17) 1. Method for operating an internal combustion engine (1), in which a fine oil mist (17)
enthaltende Blowby-Strömung (10) durch eine Gasrückführeinrichtung (1 1 ) aus einem Kurbelgehäuse (2) abgeführt und der Ladeluftseite der Brennkraftmaschine (1 ) zugeführt wird, wobei die Blowby-Strömung (10) beim Passieren eines in der Gasrückführeinrichtung (1 1 ) angeordneten Ölabscheiders (13) aufbereitet wird, dadurch gekennzeichnet, dass ein Grobölnebel (16) vor und/oder während der Aufbereitung in dem Ölabscheider (13) in die Blowby-Strömung (10) bewegt wird.  containing blowby flow (10) by a gas recirculation device (1 1) from a crankcase (2) and the charge air side of the internal combustion engine (1) is supplied, wherein the blowby flow (10) when passing a in the gas recirculation device (1 1) arranged oil separator (13) is processed, characterized in that a coarse oil mist (16) before and / or during the treatment in the oil separator (13) is moved into the blow-by flow (10).
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass ein Grobölnebel (16) vor 2. The method according to claim 1, characterized in that a coarse oil mist (16) before
und/oder während des Abführens der Blowby-Strömung (10) aus dem Kurbelgehäuse (2), in die Blowby-Strömung (10) bewegt wird.  and / or during the discharge of the blowby flow (10) from the crankcase (2) is moved into the blowby flow (10).
3. Verfahren nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass der Grobölnebel (16) in der Blowby-Strömung (10) weitestgehend parallel zu der Blowby-Strömung (10) bewegt wird. 3. The method according to claims 1 or 2, characterized in that the coarse oil mist (16) in the blow-by flow (10) is moved as far as possible parallel to the blow-by flow (10).
4. Verfahren nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Grobölnebel (16) mittels einer Sprühvorrichtung (19) erzeugt wird. 4. The method according to at least one of the preceding claims, characterized in that the coarse oil mist (16) by means of a spray device (19) is generated.
5. Verfahren nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Grobölnebel (16) mittels einer Sprühvorrichtung (19) beschleunigt wird. 5. The method according to at least one of the preceding claims, characterized in that the coarse oil mist (16) by means of a spray device (19) is accelerated.
6. Verfahren nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass in dem Kurbelgehäuse (2) mittels der Bewegung der Kurbelwelle (3) und/oder mittels in dem Kurbelgehäuse (2) angeordneter Leitelemente (14) eine um die Drehachse der Kurbelwelle (3) bewegte Gaswalze (15) erzeugt und/oder beschleunigt wird. 6. The method according to at least one of the preceding claims, characterized in that in the crankcase (2) by means of the movement of the crankshaft (3) and / or by means of the crankcase (2) arranged guide elements (14) one about the axis of rotation of the crankshaft ( 3) moving gas roller (15) is generated and / or accelerated.
7. Verfahren nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Grobölnebel (16) von einer in dem Kurbelgehäuse (2) um die Drehachse der Kurbelwelle (3) bewegten Gaswalze (15) erzeugt wird. 7. The method according to at least one of the preceding claims, characterized in that the coarse oil mist (16) of a in the crankcase (2) about the axis of rotation of the crankshaft (3) moving gas roller (15) is generated.
8. Verfahren nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Grobölnebel (16) von einer in dem Kurbelgehäuse (2) um die Drehachse der Kurbelwelle (3) bewegten Gaswalze (15) beschleunigt wird. 8. The method according to at least one of the preceding claims, characterized in that the coarse oil mist (16) by a in the crankcase (2) about the axis of rotation of the crankshaft (3) moving gas roller (15) is accelerated.
9. Brennkraftmaschine (1 ) mit einem Kurbelgehäuse (2), welches über eine 9. internal combustion engine (1) with a crankcase (2), which via a
Gasauslassöffnung (9) mit einer Gasrückführeinrichtung (1 1 ) verbunden ist, dadurch gekennzeichnet, dass in dem Kurbelgehäuse (2) und/oder in der Gasrückführeinrichtung (1 1 ) eine Sprühvorrichtung (19) zur Erzeugung eines Grobölnebels (16) angeordnet ist.  Gas outlet (9) with a gas recirculation device (1 1) is connected, characterized in that in the crankcase (2) and / or in the gas recirculation device (1 1) a spraying device (19) for generating a coarse oil mist (16) is arranged.
10. Brennkraftmaschine (1 ) mit einem Kurbelgehäuse (2), welches über eine 10. internal combustion engine (1) with a crankcase (2), which via a
Gasauslassöffnung (9) mit einer Gasrückführeinrichtung (1 1 ) verbunden ist, dadurch gekennzeichnet, dass in dem Kurbelgehäuse (2) Leitelemente (14) zur Ausbildung und Aufrechterhaltung einer Gaswalze (15) angeordnet sind.  Gas outlet (9) with a gas return device (1 1) is connected, characterized in that in the crankcase (2) guide elements (14) for forming and maintaining a gas roller (15) are arranged.
EP12799157.8A 2011-12-09 2012-12-07 Engine and method of operating such engine Active EP2788596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011120782A DE102011120782A1 (en) 2011-12-09 2011-12-09 Internal combustion engine and method for operating an internal combustion engine
PCT/EP2012/074762 WO2013083765A1 (en) 2011-12-09 2012-12-07 Internal combustion engine and method for operating an internal combustion engine

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EP2788596A1 true EP2788596A1 (en) 2014-10-15
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DE102011120782A1 (en) 2013-06-13
CN103958841A (en) 2014-07-30
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KR101647906B1 (en) 2016-08-23
KR20140106670A (en) 2014-09-03
CN103958841B (en) 2016-10-26

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