EP1544424A1 - Crankcase ventilation device - Google Patents

Crankcase ventilation device Download PDF

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Publication number
EP1544424A1
EP1544424A1 EP04026373A EP04026373A EP1544424A1 EP 1544424 A1 EP1544424 A1 EP 1544424A1 EP 04026373 A EP04026373 A EP 04026373A EP 04026373 A EP04026373 A EP 04026373A EP 1544424 A1 EP1544424 A1 EP 1544424A1
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EP
European Patent Office
Prior art keywords
crankcase
area
oil
functional area
vent line
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Granted
Application number
EP04026373A
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German (de)
French (fr)
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EP1544424B1 (en
Inventor
Andreas Stanglmeier
Johannes Dr. Mintzlaff
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication of EP1544424A1 publication Critical patent/EP1544424A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F01M2013/0005—Crankcase ventilating or breathing with systems regulating the pressure in the carter
    • 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
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers

Definitions

  • the invention relates to a device for venting a crankcase an intake engine comprising an internal combustion engine with a Outlet for gases on the crankcase and a return line the crankcase gases into the intake area.
  • crankcase gases When operating internal combustion engines, it is unavoidable that gases from Pass the combustion chamber past the piston rings into the crankcase. These gases are commonly referred to as blowby gases and Condition especially in a piston movement in the direction of the lower Tot Vietnameses UT a pressure increase in the crankcase. Usually, therefore provided a vent for the crankcase, via which a Pressure reduction can be done.
  • the discharged crankcase gases are by means of a vent line, for example in the intake of the Internal combustion engine recirculated, sucked from there and combustion fed.
  • due to the operational movement and Crankcase temperature is due to the crankcase breather oil to be discharged. If these oil-laden gases are burned, are an increased jingle hazard, a shortened catalyst life and / or deteriorated exhaust emissions, the result. It is therefore necessary Oil separation measures to meet the oil loading of at least reduced crankcase gases.
  • a Crankcase breather for an internal combustion engine with an arrangement for the separation of oil from the discharged air, which is within the Crankcase arranged in the region of a vent line, includes rotating impeller with blades.
  • the spinner wheel body is formed like a disk and carries radially extending blades, which in Schleuderradachscardi in the direction of Lucasabströmstutzens extend.
  • the inlet opening of the Lucasabströmstutzens is at least arranged approximately coaxial with the blast wheel and the opening plane at the spin wheel level at least approximately parallel, so that the inlet end of the Lucasabströmstutzens with the airabststutzen side Blade edges of the rotating blast wheel one Includes flow gap.
  • the in the German patent application 102 36 332.3-13 described crankcase ventilation is very compact constructed, consists of only a few components and is therefore inexpensive to manufacture. and mountable. Furthermore, the crankcase ventilation is characterized by a particularly good effectiveness especially at a high Application of oil to be discharged gases. It has, however proved that this single action is very powerful Internal combustion engines as well as with particularly stringent requirements exhaust emissions reach their limits.
  • DE 100 53 096 A1 discloses a device for venting a Crankcase of an internal combustion engine by means of a valve, wherein the Valve stationary in a partition wall, which is the interior of the crankcase is divided into an upper space and a lower space is arranged.
  • the described arrangement leads by the reduction of Air pressure fluctuations in the crankcase to a lower oil load in the crankcase and less oil foaming in the oil circuit.
  • both power and torque are the Internal combustion engine by reducing friction losses on the crank mechanism elevated. Also this individual measure is very effective in itself, However, in very powerful internal combustion engines as well as in particularly stringent exhaust emission requirements alone sufficient.
  • German patent application 102 36 332.3-13 and the DE 100 53 096 A1 belong to the full extent with all features Disclosure of the present application. They contribute to technical aim of the invention and thus to solve the according to the invention according to the invention underlying technical task at.
  • the request for protection may apply to all characteristics, individually or in Combination, extend.
  • the object of the invention is to provide an aforementioned device for Ventilation of a crankcase of a intake area comprehensive Internal combustion engine with an outlet for gases on the crankcase as well a line for returning the crankcase gases in the To provide intake, which is also very powerful Internal combustion engines and / or particularly stringent requirements for the Exhaust gas values is sufficiently effective.
  • the partition advantageously divides the interior the crankcase in an overhead crank chamber and a underlying oil space. As it is considered very useful if the Valve is pressure controlled or actuated by an actuator.
  • the second one Functional area formed by a blast wheel with blades whose Blade with the entry area of a vent line a (ring) gap lock in.
  • the blast wheel in the process Operation on the bleeding flow in the opposite direction.
  • the third functional area is according to a particularly preferred Embodiment formed with a knitted fabric separator, which advantageously in the vent line the impeller immediately is subordinate. It is very useful when recording the Knitted separator the vent line a diameter-expanded Has area.
  • the Knitted fabric separator made of a metallic or organic material or from a fuel and oil resistant plastic.
  • the vent line is Appropriately, starting from the crankcase to the intake arranged steadily rising.
  • FIG. 1 shows a two-cylinder internal combustion engine 100 in box construction in sectional view from the front.
  • the internal combustion engine comprises two cylinders which enclose an angle of 180 °, with opposite in operation moving piston 106.
  • this Type is due to the at the same time to UT or top dead center OT moving piston 106, the device according to the invention particularly advantageous. For clarity, only one page is referred to in the present case.
  • the pistons 106 delimit combustion chambers 120 in the direction of the crankshaft 122, for sealing the combustion chambers 120 in the region of the piston 106 against the Cylinder running piston rings 112 are provided.
  • At very high pressure in the combustion chambers 120 in particular in the combustion cycle, can nevertheless according to the arrows as blowby gases designated gases from the combustion chambers past the Kolberingen 112 in the crank chamber 114 penetrate, causing a pressure increase in the crank chamber 114th entails.
  • the crankcase 102 by means of a partition 118 in an upper space 114 and a lower space 124 divided.
  • a valve 110 for example, a diaphragm valve provided, which at an elevated Pressure in the crank chamber 114 a pressure equalization according to drawn arrow into the lower space 124 allows.
  • the valve 110 is particularly suitable, which goes back to the piston movement To smooth pressure pulsation.
  • the lower space 124 is associated with an oil sump 116 and wells 108th for receiving timing chains, not shown here, through which a further discharge of blowby gases according to the drawn Arrows in the direction of the cylinder heads 104 takes place.
  • a discharge the oil-laden blowby gases according to the arrows past a blast wheel 232, soft by means of a shaft 230 is drivable in a vent line 238.
  • the Shaft 230 a camshaft, which end the impeller 232 receives.
  • the blower wheel 232 has a disk-like base body which extends in the direction of the inlet of the vent line 238 extending, radially arranged wing carries. The outer wing edges when rotated with the inlet of the vent line 238 (Ring) gap, which the blowby gases pass in the ventilation direction.
  • the blower wheel 232 promotes rotation against the flow direction the blowby gases, so that a first oil separation is achieved by Oil drops of turbulent flow can not follow, on blades of the impeller 232 knock down and back to the oil sump 216 be supplied.
  • Knitted fabric consists for example of a metallic or organic Material or from a fuel and oil resistant plastic. At the Passage through the fabric bounces in the blowby gas still entrained Oil drops against the conduction walls or fibers, agglomerate, run Gravity down along the walls or fibers down, collect there and finally by means of the paddle wheel 232 promoted back to the oil room.
  • vent line 238 extends from the crankcase 202 steadily rising and flows into the intake 236 of the Internal combustion engine 200.

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

Abstract

The crankcase has a gas outlet, and a return pipe to feed the gas into the intake area. The device has a multiple-function assembly for separation of oil from the return gas. A first functional area for reduction of pressure pulsation is formed by a valve (110), in a dividing wall between upper and lower chambers (114,124) of the crankcase interior (102). A second functional area for first oil separation is formed by a centrifugal wheel (232) with blades, which define a ring gap together with the intake area of a ventilation pipe (238). A third functional area is formed by a knitted material separator (234), located in the ventilation pipe behind the centrifugal wheel. This separator consists of a metallic or organic material, or a fuel and oil-resistant plastic.

Description

Die Erfindung betrifft eine Einrichtung zur Entlüftung eines Kurbelgehäuses einer einen Ansaugbereich umfassenden Brennkraftmaschine mit einem Auslass für Gase am Kurbelgehäuse sowie einer Leitung zur Rückführung der Kurbelgehäusegase in den Ansaugbereich.The invention relates to a device for venting a crankcase an intake engine comprising an internal combustion engine with a Outlet for gases on the crankcase and a return line the crankcase gases into the intake area.

Beim Betrieb von Brennkraftmaschinen ist es unvermeidbar, dass Gase aus dem Brennraum vorbei an den Kolbenringen in das Kurbelgehäuse strömen. Diese Gase werden üblicherweise als Blowby-Gase bezeichnet und bedingen insbesondere bei einer Kolbenbewegung in Richtung des unteren Totpunkts UT einen Druckanstieg im Kurbelgehäuse. Üblicherweise ist daher eine Entlüftung für das Kurbelgehäuse vorgesehen, über welche ein Druckabbau erfolgen kann. Die abgeführten Kurbelgehäusegase werden mittels einer Entlüftungsleitung beispielsweise in den Ansaugtrakt der Brennkraftmaschine rückgeführt, von dort angesaugt und der Verbrennung zugeführt. Insbesondere aufgrund der betriebsbedingten Bewegung und Temperatur im Kurbelgehäuse sind die durch die Kurbelgehäuseentlüftung abzuführenden Gase ölbeladen. Werden diese ölbeladenen Gase verbrannt, sind eine erhöhte Klingelgefahr, eine verkürzte Katalysatorlebensdauer und/oder verschlechterte Abgaswerte die Folge. Es ist daher erforderlich, Maßnahmen zur Ölabscheidung zu treffen um die Ölbeladung der abgeführten Kurbelgehäusegase zumindest zu reduzieren.When operating internal combustion engines, it is unavoidable that gases from Pass the combustion chamber past the piston rings into the crankcase. These gases are commonly referred to as blowby gases and Condition especially in a piston movement in the direction of the lower Totpunkts UT a pressure increase in the crankcase. Usually, therefore provided a vent for the crankcase, via which a Pressure reduction can be done. The discharged crankcase gases are by means of a vent line, for example in the intake of the Internal combustion engine recirculated, sucked from there and combustion fed. In particular, due to the operational movement and Crankcase temperature is due to the crankcase breather oil to be discharged. If these oil-laden gases are burned, are an increased jingle hazard, a shortened catalyst life and / or deteriorated exhaust emissions, the result. It is therefore necessary Oil separation measures to meet the oil loading of at least reduced crankcase gases.

Es wurden bereits Maßnahmen zur Ölabscheidung aus Kurbelgehäuseentlüftungsgasen vorgeschlagen. Beispielsweise beschreibt die noch nicht veröffentlichte deutsche Patentanmeldung 102 36 332.3-13 eine Kurbelgehäuseentlüftung für eine Brennkraftmaschine mit einer Anordnung zur Ölabscheidung aus der abzuführenden Luft, welche ein innerhalb des Kurbelgehäuses im Bereich einer Entlüftungsleitung angeordnetes, rotierendes Schleuderrad mit Schaufeln umfasst. Der Schleuderradkörper ist scheibenartig ausgebildet und trägt radial verlaufende Schaufeln, welche sich in Schleuderradachsrichtung in Richtung eines Luftabströmstutzens erstrecken. Die Einlassöffnung des Luftabströmstutzens ist zumindest annähernd koaxial zum Schleuderrad angeordnet und die Öffnungsebene zur Schleuderradebene zumindest annähernd parallel, so dass der einlassseitige Endbereich des Luftabströmstutzens mit den luftabströmstutzenseitigen Schaufelkanten des rotierenden Schleuderrads einen Strömungsspalt einschließt. Die in der deutschen Patentanmeldung 102 36 332.3-13 beschriebene Kurbelgehäuseentlüftung ist sehr kompakt aufgebaut, besteht aus nur wenigen Bauteilen und ist daher günstig herstell- und montierbar. Ferner zeichnet sich die Kurbelgehäuseentlüftung durch eine besonders gute Wirksamkeit insbesondere bei einer hohen Ölbeaufschlagung der abzuführenden Gase aus. Es hat sich jedoch herausgestellt, dass diese Einzelmaßnahme bei sehr leistungsstarken Brennkraftmaschinen ebenso wie bei besonders strengen Anforderungen an die Abgaswerte an ihre Grenzen stößt.There have already been measures for oil separation from crankcase ventilation gases proposed. For example, that does not yet describe Published German Patent Application 102 36 332.3-13 a Crankcase breather for an internal combustion engine with an arrangement for the separation of oil from the discharged air, which is within the Crankcase arranged in the region of a vent line, includes rotating impeller with blades. The spinner wheel body is formed like a disk and carries radially extending blades, which in Schleuderradachsrichtung in the direction of Luftabströmstutzens extend. The inlet opening of the Luftabströmstutzens is at least arranged approximately coaxial with the blast wheel and the opening plane at the spin wheel level at least approximately parallel, so that the inlet end of the Luftabströmstutzens with the airabststutzen side Blade edges of the rotating blast wheel one Includes flow gap. The in the German patent application 102 36 332.3-13 described crankcase ventilation is very compact constructed, consists of only a few components and is therefore inexpensive to manufacture. and mountable. Furthermore, the crankcase ventilation is characterized by a particularly good effectiveness especially at a high Application of oil to be discharged gases. It has, however proved that this single action is very powerful Internal combustion engines as well as with particularly stringent requirements exhaust emissions reach their limits.

Die DE 100 53 096 A1 offenbart eine Vorrichtung zur Entlüftung eines Kurbelgehäuses einer Brennkraftmaschine mittels eines Ventils, wobei das Ventil ortsfest in einer Trennwand, die den Innenraum des Kurbelgehäuses in einen oberen Raum und einen unteren Raum aufteilt, angeordnet ist. Die beschriebene Anordnung führt durch die Reduzierung von Luftdruckschwankungen im Kurbelgehäuse zu einer geringeren Ölbeladung im Kurbelgehäuse und zu einer geringeren Ölverschäumung im Ölkreislauf. Darüber hinaus werden sowohl Leistung und Drehmoment der Brennkraftmaschine durch Reduktion von Reibungsverlusten am Kurbeltrieb erhöht. Auch diese Einzelmaßnahme ist für sich gesehen sehr wirksam, jedoch bei sehr leistungsstarken Brennkraftmaschinen ebenso wie bei besonders strengen Anforderungen an die Abgaswerte alleine nicht ausreichend.DE 100 53 096 A1 discloses a device for venting a Crankcase of an internal combustion engine by means of a valve, wherein the Valve stationary in a partition wall, which is the interior of the crankcase is divided into an upper space and a lower space is arranged. The described arrangement leads by the reduction of Air pressure fluctuations in the crankcase to a lower oil load in the crankcase and less oil foaming in the oil circuit. In addition, both power and torque are the Internal combustion engine by reducing friction losses on the crank mechanism elevated. Also this individual measure is very effective in itself, However, in very powerful internal combustion engines as well as in particularly stringent exhaust emission requirements alone sufficient.

Sowohl die deutsche Patentanmeldung 102 36 332.3-13 als auch die DE 100 53 096 A1 gehören in vollem Umfang mit allen Merkmalen zum Offenbarungsgehalt der vorliegenden Anmeldung. Sie tragen zum technischen Ziel der Erfindung und somit zur Lösung der der anmeldungsgemäßen Erfindung zugrundeliegenden technischen Aufgabe bei. Das Schutzbegehren kann sich auf alle Merkmale, einzeln oder in Kombination, erstrecken.Both the German patent application 102 36 332.3-13 and the DE 100 53 096 A1 belong to the full extent with all features Disclosure of the present application. They contribute to technical aim of the invention and thus to solve the according to the invention according to the invention underlying technical task at. The request for protection may apply to all characteristics, individually or in Combination, extend.

Aufgabe der Erfindung ist es, eine eingangs genannte Einrichtung zur Entlüftung eines Kurbelgehäuses einer einen Ansaugbereich umfassenden Brennkraftmaschine mit einem Auslass für Gase am Kurbelgehäuse sowie einer Leitung zur Rückführung der Kurbelgehäusegase in den Ansaugbereich bereitzustellen, welche auch bei sehr leistungsstarken Brennkraftmaschinen und/oder besonders strengen Anforderungen an die Abgaswerte ausreichend wirksam ist.The object of the invention is to provide an aforementioned device for Ventilation of a crankcase of a intake area comprehensive Internal combustion engine with an outlet for gases on the crankcase as well a line for returning the crankcase gases in the To provide intake, which is also very powerful Internal combustion engines and / or particularly stringent requirements for the Exhaust gas values is sufficiently effective.

Die Lösung der Aufgabe erfolgt mit den Merkmalen des Anspruchs 1, wobei gemäß dem zugrundeliegenden Gedanken eine multifunktionale Anordnung zur Ölabscheidung aus der abzuführenden Luft, umfassend einen ersten Funktionsbereich zur Reduktion einer Druckpulsation, einen zweiten Funktionsbereich zur ersten Ölabscheidung sowie einen dritten Funktionsbereich zur weiteren Ölabscheidung vorgesehen ist.The object is achieved by the features of claim 1, wherein according to the underlying idea of a multifunctional arrangement for separating oil from the air to be discharged, comprising a first Function range for reducing a pressure pulsation, a second Functional area for the first oil separation and a third Functional area is provided for further oil separation.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments and further developments of the invention are Subject of the dependent claims.

Gemäß einem besonders bevorzugten Ausführungsbeispiel ist der erste Funktionsbereich mit einem einer den Innenraum des Kurbelgehäuses in einen oberen und einen unteren Raum teilenden Trennwand zugeordneten Ventil gebildet. Die Trennwand teilt dabei vorteilhafterweise den Innenraum des Kurbelgehäuses in einen obenliegenden Kurbelraum und einen untenliegenden Ölraum. Als sehr zweckmäßig wird es angesehen, wenn das Ventil druckgesteuert oder von einem Stellglied betätigt ist.According to a particularly preferred embodiment, the first Functional area with a the interior of the crankcase in associated with an upper and a lower space dividing partition Valve formed. The partition advantageously divides the interior the crankcase in an overhead crank chamber and a underlying oil space. As it is considered very useful if the Valve is pressure controlled or actuated by an actuator.

Einem besonders bevorzugten Ausführungsbeispiel zufolge ist der zweite Funktionsbereich mit einem Schleuderrad mit Schaufeln gebildet, dessen Schaufeln mit dem Eintrittsbereich einer Entlüftungsleitung einen (Ring-)Spalt einschließen. Zweckmäßigerweise weist das Schleuderrad dabei im Betrieb eine dem Entlüftungsstrom entgegengerichtete Förderrichtung auf.According to a particularly preferred embodiment, the second one Functional area formed by a blast wheel with blades whose Blade with the entry area of a vent line a (ring) gap lock in. Conveniently, the blast wheel in the process Operation on the bleeding flow in the opposite direction.

Der dritte Funktionsbereich ist gemäß einem besonders bevorzugten Ausführungsbeispiel mit einem Gestrickabscheider gebildet, welcher vorteilhafterweise in der Entlüftungsleitung dem Schleuderrad unmittelbar nachgeordnet ist. Sehr zweckmäßig ist es, wenn zur Aufnahme des Gestrickabscheiders die Entlüftungsleitung einen durchmessererweiterten Bereich aufweist.The third functional area is according to a particularly preferred Embodiment formed with a knitted fabric separator, which advantageously in the vent line the impeller immediately is subordinate. It is very useful when recording the Knitted separator the vent line a diameter-expanded Has area.

Gemäß einer sehr vorteilhaften Ausgestaltung der Erfindung besteht der Gestrickabscheider aus einem metallischen oder organischen Material oder aus einem kraftstoff- und ölbeständigen Kunststoff. Die Entlüftungsleitung ist zweckmäßigerweise ausgehend vom Kurbelgehäuse bis zum Ansaugbereich stetig steigend angeordnet.According to a very advantageous embodiment of the invention, the Knitted fabric separator made of a metallic or organic material or from a fuel and oil resistant plastic. The vent line is Appropriately, starting from the crankcase to the intake arranged steadily rising.

Nachfolgend ist ein besonders zu bevorzugendes Ausführungsbeispiel der Erfindung unter Bezugnahme auf Figuren näher erläutert, dabei zeigen schematisch und beispielhaft

Figur 1
eine Brennkraftmaschine mit Kurbelgehäuseentlüftung in Schnittansicht von vorne und
Figur 2
eine Brennkraftmaschine mit Kurbelgehäuseentlüftung in seitlicher Schnittansicht.
Below is a particularly preferred embodiment of the invention with reference to figures explained in more detail, showing schematically and by way of example
FIG. 1
an internal combustion engine with crankcase ventilation in sectional view from the front and
FIG. 2
an internal combustion engine with crankcase ventilation in side sectional view.

Figur 1 zeigt eine zweizylindrige Brennkraftmaschine 100 in Boxerbauweise in Schnittansicht von vorne. Die Brennkraftmaschine umfasst zwei Zylinder welche einen Winkel von 180° einschließen, mit sich im Betrieb gegenläufig bewegenden Kolben 106. In Verbindung mit Brennkraftmaschinen dieser Bauart ist aufgrund der sich gleichzeitig nach UT bzw. zum oberer Totpunkt OT bewegenden Kolben 106 die erfindungsgemäße Einrichtung besonders von Vorteil. Zur besseren Übersicht ist vorliegend nur eine Seite bezeichnet.FIG. 1 shows a two-cylinder internal combustion engine 100 in box construction in sectional view from the front. The internal combustion engine comprises two cylinders which enclose an angle of 180 °, with opposite in operation moving piston 106. In conjunction with internal combustion engines this Type is due to the at the same time to UT or top dead center OT moving piston 106, the device according to the invention particularly advantageous. For clarity, only one page is referred to in the present case.

Die Kolben 106 begrenzen in Richtung Kurbelwelle 122 Brennräume 120, zur Abdichtung der Brennräume 120 im Bereich der Kolben 106 gegen die Zylinderlaufbahn sind Kolbenringen 112 vorgesehen. Bei sehr hohem Druck in den Brennräumen 120, insbesondere im Verbrennungstakt, können dennoch entsprechend den eingezeichneten Pfeilen als Blowby-Gase bezeichnete Gase aus den Brennräumen an den Kolberingen 112 vorbei in den Kurbelraum 114 dringen, was einen Druckanstiegs im Kurbelraum 114 zur Folge hat. The pistons 106 delimit combustion chambers 120 in the direction of the crankshaft 122, for sealing the combustion chambers 120 in the region of the piston 106 against the Cylinder running piston rings 112 are provided. At very high pressure in the combustion chambers 120, in particular in the combustion cycle, can nevertheless according to the arrows as blowby gases designated gases from the combustion chambers past the Kolberingen 112 in the crank chamber 114 penetrate, causing a pressure increase in the crank chamber 114th entails.

Insbesondere in Hinblick auf den Wirkungsgrad der Brennkraftmaschine 100 ist es erforderlich, die Blowby-Gase aus dem Kurbelraum 114 abzuführen, so dass die Kolbenunterseiten zumindest nicht übermäßig druckbeaufschlagt sind. Vorliegend ist das Kurbelgehäuse 102 mittels einer Trennwand 118 in einen oberen Raum 114 und einen unteren Raum 124 aufgeteilt. Zur Entlüftung des Kurbelraumes 114 ist in der Trennwand 118 ein Ventil 110, beispielsweise ein Membranventil, vorgesehen, welches bei einem erhöhten Druck im Kurbelraum 114 einen Druckausgleich entsprechend dem eingezeichneten Pfeil in den unteren Raum 124 ermöglicht. Das Ventil 110 ist insbesondere geeignet, die auf die Kolbenbewegung zurückgehende Druckpulsation zu glätten.In particular with regard to the efficiency of the internal combustion engine 100 it is necessary to remove the blowby gases from the crank chamber 114, so that the piston bottoms at least not excessively pressurized are. In the present case, the crankcase 102 by means of a partition 118 in an upper space 114 and a lower space 124 divided. to Ventilation of the crank chamber 114 is in the partition wall 118, a valve 110, For example, a diaphragm valve provided, which at an elevated Pressure in the crank chamber 114 a pressure equalization according to drawn arrow into the lower space 124 allows. The valve 110 is particularly suitable, which goes back to the piston movement To smooth pressure pulsation.

Dem unteren Raum 124 ist ein Ölsumpf 116 zugeordnet sowie Schächte 108 zur Aufnahme von hier nicht näher dargestellten Steuerketten, durch welche eine weitere Abfuhr der Blowby-Gase entsprechend den eingezeichneten Pfeilen in Richtung der Zylinderköpfe 104 erfolgt.The lower space 124 is associated with an oil sump 116 and wells 108th for receiving timing chains, not shown here, through which a further discharge of blowby gases according to the drawn Arrows in the direction of the cylinder heads 104 takes place.

Aus dem Zylinderkopfbereich 104 erfolgt wie mit Figur 2 gezeigt, eine Abfuhr der ölbeladenen Blowby-Gase entsprechend den eingezeichneten Pfeilen vorbei an einem Schleuderrad 232, weiches mittels einer Welle 230 antreibbar ist in eine Entlüftungsleitung 238. Zweckmäßigerweise ist die Welle 230 eine Nockenwelle, welche endseitig das Schleuderrad 232 aufnimmt. Das Schleuderrad 232 weist einen scheibenartigen Grundkörper auf, welcher sich in Richtung des Einlasses der Entlüftungsleitung 238 erstreckende, radial angeordnete Flügel trägt. Die äußeren Flügelkanten schließen bei Rotation mit dem Einlass der Entlüftungsleitung 238 einen (Ring-)Spalt ein, welchen die Blowby-Gase in Entlüftungsrichtung passieren. Das Schleuderrad 232 fördert bei Drehung entgegen der Strömungsrichtung der Blowby-Gase, so dass eine erste Ölabscheidung erreicht wird, indem Öltropfen der turbulenten Strömung nicht folgen können, sich an Schaufeln des Schleuderrads 232 niederschlagen und wieder dem Ölsumpf 216 zugeführt werden.From the cylinder head portion 104, as shown in Figure 2, a discharge the oil-laden blowby gases according to the arrows past a blast wheel 232, soft by means of a shaft 230 is drivable in a vent line 238. Appropriately, the Shaft 230, a camshaft, which end the impeller 232 receives. The blower wheel 232 has a disk-like base body which extends in the direction of the inlet of the vent line 238 extending, radially arranged wing carries. The outer wing edges when rotated with the inlet of the vent line 238 (Ring) gap, which the blowby gases pass in the ventilation direction. The blower wheel 232 promotes rotation against the flow direction the blowby gases, so that a first oil separation is achieved by Oil drops of turbulent flow can not follow, on blades of the impeller 232 knock down and back to the oil sump 216 be supplied.

Eine weitere Ölabscheidung erfolgt an einem in Entlüftungrichtung nachfolgenden Gestrickabscheider 234. Aufgrund des vorgeschalteten Schleuderrades 232 und der Pulsationsglättung durch das Ventil (Fig.1, 110) ist eine hinreichende Wirksamkeit dieser Maßnahme gegeben. Der Raum zur Aufnahme des Gestrickabscheiders 234 weist einen gegenüber der Entlüftungsleitung 238 erweiterten Durchmesser auf. Das eingebrachte Gestrick besteht beispielsweise aus einem metallischen oder organischen Material oder aus einem kraftstoff- und ölbeständigen Kunststoff. Beim Durchgang durch das Gestrick prallen im Blowby-Gas noch mitgeführte Öltropfen gegen die Leitungswandungen bzw. Fasern, agglomerieren, laufen schwerkraftbedingt entlang der Wandungen bzw. Fasern nach unten, sammeln sich dort und werden schließlich mittels des Schaufelrads 232 zurück in den Ölraum gefördert.Another oil separation takes place in a venting direction subsequent knit separator 234. Due to the upstream Impeller 232 and the Pulsationsglättung through the valve (Fig.1, 110) is given a sufficient effectiveness of this measure. The space for receiving the knitted fabric separator 234 has a relation to the Vent line 238 extended diameter. The introduced Knitted fabric consists for example of a metallic or organic Material or from a fuel and oil resistant plastic. At the Passage through the fabric bounces in the blowby gas still entrained Oil drops against the conduction walls or fibers, agglomerate, run Gravity down along the walls or fibers down, collect there and finally by means of the paddle wheel 232 promoted back to the oil room.

Die Entlüftungsleitung 238 verläuft ausgehend vom Kurbelgehäuse 202 stetig steigend und mündet in den Ansaugbereich 236 der Brennkraftmaschine 200.The vent line 238 extends from the crankcase 202 steadily rising and flows into the intake 236 of the Internal combustion engine 200.

Claims (11)

Einrichtung zur Entlüftung eines Kurbelgehäuses einer einen Ansaugbereich umfassenden Brennkraftmaschine mit einem Auslass für Gase am Kurbelgehäuse sowie einer Leitung zur Rückführung der Kurbelgehäusegase in den Ansaugbereich, gekennzeichnet durch eine multifunktionale Anordnung zur Ölabscheidung aus der abzuführenden Luft, umfassend einen ersten Funktionsbereich zur Reduktion einer Druckpulsation, einen zweiten Funktionsbereich zur ersten Ölabscheidung sowie einen dritten Funktionsbereich zur weiteren Ölabscheidung. Device for venting a crankcase of an internal combustion engine comprising an intake area an outlet for gases on the crankcase and a line for returning the crankcase gases into the intake area, characterized by a multifunctional arrangement for oil separation from the air to be discharged, comprising a first functional area for reducing a pressure pulsation, a second functional area for the first oil separation as well a third functional area for further oil separation. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der erste Funktionsbereich mit einem einer den Innenraum des Kurbelgehäuses (102) in einen oberen (114) und eine unteren Raum (124) teilenden Trennwand (118) zugeordneten Ventil (110) gebildet ist. Device according to claim 1, characterized in that the first functional area with a one of the interior of the crankcase (102) in an upper (114) and a lower space (124) dividing partition (118) associated valve (110) is formed. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der obere Raum (114) als Kurbelraum und der untere Raum (124) als Ölraum ausgebildet ist.Device according to claim 2, characterized in that the upper space (114) as a crank chamber and the lower space (124) is formed as an oil chamber. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Ventil (110) druckgesteuert oder von einem Stellglied betätigt ist.Device according to claim 1 or 2, characterized in that the valve (110) is pressure-controlled or actuated by an actuator. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Funktionsbereich mit einem Schleuderrad (232) mit Schaufeln gebildet ist, dessen Schaufeln mit dem Eintrittsbereich einer Entlüftungsleitung (238) einen (Ring-)Spalt einschließen.Device according to one of the preceding claims, characterized in that the second functional area is formed with a blast wheel (232) with blades, whose blades with the inlet region of a vent line (238) include a (ring) gap. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schleuderrad (232) im Betrieb eine dem Entlüftungsstrom entgegengerichtete Förderrichtung aufweist.Device according to one of the preceding claims, characterized in that the blower wheel (232) has in operation a conveying direction opposite to the venting flow. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der dritte Funktionsbereich mit einem Gestrickabscheider (234) gebildet ist.Device according to one of the preceding claims, characterized in that the third functional region is formed with a knitted fabric separator (234). Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gestrickabscheider (234) in der Entlüftungsleitung (238) dem Schleuderrad (232) unmittelbar nachgeordnet ist.Device according to one of the preceding claims, characterized in that the knitted separator (234) in the vent line (238) is arranged downstream of the blower wheel (232). Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Aufnahme des Gestrickabscheiders (232) die Entlüftungsleitung (238) einen durchmessererweiterten Bereich aufweist. Device according to one of the preceding claims, characterized in that for receiving the knitted fabric separator (232), the vent line (238) has a diameter-expanded area. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gestrickabscheider (232) aus einem metallischen oder organischen Material oder aus einem kraftstoff- und ölbeständigen Kunststoff besteht.Device according to one of the preceding claims, characterized in that the knitted fabric separator (232) consists of a metallic or organic material or of a fuel and oil resistant plastic. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Entlüftungsleitung (238) ausgehend vom Kurbelgehäuse (202) bis zum Ansaugbereich (236) stetig steigend angeordnet ist.Device according to one of the preceding claims, characterized in that the vent line (238) starting from the crankcase (202) to the suction area (236) is arranged to rise steadily.
EP04026373A 2003-12-16 2004-11-05 Crankcase ventilation device Expired - Fee Related EP1544424B1 (en)

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DE2003159069 DE10359069A1 (en) 2003-12-16 2003-12-16 Device for venting a crankcase
DE10359069 2003-12-16

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DE202014010065U1 (en) 2014-12-19 2016-01-25 Reinz-Dichtungs-Gmbh Valve
DE202017100507U1 (en) 2017-01-31 2018-05-03 Reinz-Dichtungs-Gmbh Valve
EP3655635B1 (en) * 2017-07-21 2024-05-15 General Atomics Aeronautical Systems, Inc. Enhanced aero diesel engine

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DE102011002845A1 (en) 2011-01-19 2012-07-19 Ford Global Technologies, Llc Refrigerant line and appropriately designed vehicle air conditioning

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DE202014010065U1 (en) 2014-12-19 2016-01-25 Reinz-Dichtungs-Gmbh Valve
DE202017100507U1 (en) 2017-01-31 2018-05-03 Reinz-Dichtungs-Gmbh Valve
EP3655635B1 (en) * 2017-07-21 2024-05-15 General Atomics Aeronautical Systems, Inc. Enhanced aero diesel engine

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DE10359069A1 (en) 2005-07-21
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