EP3301290A1 - Channel system for a combustion engine - Google Patents

Channel system for a combustion engine Download PDF

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Publication number
EP3301290A1
EP3301290A1 EP17193450.8A EP17193450A EP3301290A1 EP 3301290 A1 EP3301290 A1 EP 3301290A1 EP 17193450 A EP17193450 A EP 17193450A EP 3301290 A1 EP3301290 A1 EP 3301290A1
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EP
European Patent Office
Prior art keywords
channel
fresh air
blow
duct
mixing housing
Prior art date
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Granted
Application number
EP17193450.8A
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German (de)
French (fr)
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EP3301290B1 (en
Inventor
Jean KÜBBELER
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Pierburg GmbH
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Pierburg GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0276—Throttle and EGR-valve operated together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors

Definitions

  • the present invention relates to a duct system for an internal combustion engine with a mixing housing, a blow-by channel, which is connected to the venting of a crankcase of the internal combustion engine with the crankcase and opens into the mixing housing, and a fresh air duct, which opens into the mixing housing, over the fresh air can be fed.
  • the duct system further comprises an exhaust gas recirculation channel, which opens into the mixing housing, via which an exhaust gas stream can be fed and an intake duct, via which a mixed stream can be discharged.
  • Such duct systems are known from the prior art and are used in an internal combustion engine for the return of exhaust gases to the internal combustion engine.
  • such duct systems can be used simultaneously to return blow-by gases, which arise when venting the crankcase to the internal combustion engine.
  • the US 5,611,204 discloses a duct system in which the venturi effect is utilized to supply either recirculated exhaust gas or blow-by gas to the fresh air stream.
  • the DE 10 2014 114 968 A1 discloses a duct system in which a control body is provided, which has a first flap for closing a fresh air outlet and a second flap for closing an exhaust gas recirculation orifice.
  • the control body regulates a fresh air flow as a function of an exhaust gas flow.
  • the mixture of fresh air and recirculated exhaust gas is then passed in the duct system to an intake passage.
  • the object of the present invention is therefore to provide a duct system for an internal combustion engine, in which there is less noise.
  • the fresh air channel and the blow-by channel opens into the mixing housing in parallel.
  • the channel central axes of the fresh air channel and the blow-by channel are thus parallel to each other at least in the region of the mouths in the mixing housing.
  • the flow of both channels introduced into the mixing housing is also essentially parallel to one another. This avoids that the fresh air flows over the mouth of the blow-by channel. The resulting noise in the overflow are thus also avoided. Thereby, the noise in the channel system can be reduced.
  • a control body is rotatably arranged in the mixing housing, which regulates a flow of the exhaust gas recirculation passage and the fresh air passage depending on each other.
  • a control body is rotatably arranged in the mixing housing, which regulates a flow of the fresh air channel, the blow-by channel and the exhaust gas recirculation channel depending on each other.
  • a blow-by channel outlet cross-section and a fresh air duct outlet cross-section are arranged in a plane.
  • the plane can have any angle to the central channel axes. This avoids that there is an overflow of the blow-by channel mouth.
  • the plane is arranged to the channel centerlines hired to improve the controllability.
  • control body is mounted eccentrically on a shaft.
  • shaft is arranged outside a flow cross-section of the exhaust gas recirculation channel.
  • Butterfly valve with such a control body a pressure loss minimizing control of two channels is possible.
  • control body is a flap.
  • a flap is an easy way to regulate the flow of the exhaust gas recirculation channel and the fresh air channel depending on each other.
  • control body on a first flap, which controls the fresh air passage and the blow-by channel, and a second flap, which regulates the exhaust passage, and which is connected to the first flap on. Due to the design with two flaps, the arrangement of the shaft to the valve seat can be done with significantly less accurate tolerance.
  • the shaft is preferably arranged outside of a Haupt penströmquerargues the fresh air passage and the exhaust gas recirculation passage.
  • the shaft is thus not in the flow of the mixed stream in the mixing housing in the direction of the intake passage.
  • the flow is not disturbed by the shaft, resulting in a low flow resistance, which means that larger amounts of mixed stream can be discharged to the intake passage and thus to the internal combustion engine.
  • the fresh air duct and the blow-by duct are integrated in a one-piece connection housing.
  • the connection housing is a separate part which can be fastened to the mixing housing.
  • the mixing housing is connected directly to the connection housing via a flange surface.
  • the connection housing can be easily connected to the mixing housing, so that the channel system is even more economical to produce.
  • the mixing housing has three flange surfaces. At the flange surfaces which open into the mixing housing channels and emerging from the mixing housing intake are connected, wherein for the blow-by channel together with the fresh air duct only a flange is provided.
  • the channels can be connected via the flange easily with the mixing housing, so that the channel system is more economical to produce.
  • the mixing housing is formed integrally with an actuator housing, in which an actuator is arranged, via which the shaft of the control body is actuated. This reduces the number of parts and reduces assembly costs.
  • the channel system can be made more economical.
  • FIG. 1 shows a perspective view of a channel system 10 according to the invention for an internal combustion engine.
  • the duct system 10 has a mixing housing 14 into which a blow-by duct 18, a fresh air duct 22, can be supplied via the fresh air and an exhaust gas recirculation duct 26, which recirculates exhaust gas to the internal combustion engine, open.
  • the blow-by channel 18 connects the crankcase with the mixing housing 14.
  • a mixed flow of blow-by gas, fresh air and recirculated exhaust gas formed in the mixing housing 14 can be discharged via an intake passage 30 connected to the mixing housing 14.
  • the mixing housing 14 forms a flange surface 34, to which an integral connection housing 38 can be attached by means of screws 42 (a screw 42 is shown by way of example).
  • a blow-by connection piece 46 and a fresh air connection piece 50 are arranged, which form part of the blow-by channel 18 and the fresh air channel 22.
  • Blow-By connection piece 46 and fresh air connection piece 50 are arranged at the connection housing 38 substantially at right angles to each other.
  • FIG. 2 shows a side view of the vertically cut channel system 10.
  • This figure shows that the blow-by channel 18 is bent by approximately 90 °, so that the blow-by channel 18 and the fresh air channel 22, which are substantially perpendicular to each other in the connection housing 38 integrated , Open parallel to the mixing housing 14.
  • a blow-by channel central axis 51 is thus arranged in the region of a blow-by channel opening 52 parallel to a fresh air channel center axis 53.
  • a blow-by duct outlet cross-section 55 and a fresh air duct outlet cross-section 56 is arranged.
  • the blow-by channel outlet cross-section 55 and the Fresh air duct outlet cross-section 56 are additionally arranged in a plane 58, whereby an overflow of the blow-by duct mouth 52 is avoided by a fresh air flow.
  • first flap 70 is arranged, which regulates the flow from the blow-by channel 18 and the fresh air duct 22.
  • the first flap 70 is in the form of a tongue (see FIG. 3 ), with which the blow-by channel mouth 52 and the fresh air duct mouth 54 to close or open.
  • the first flap 70 has a smaller width B than in the region of the fresh-air channel mouth 54
  • FIG. 2 shown first flap 70 is shown in a middle position in which the blow-by channel mouth 52 and the fresh air duct mouth 54 are not fully open or closed.
  • the control body 66 additionally has a second flap 78, which regulates the opening cross section of the exhaust gas recirculation channel 26 and is fastened to the first flap 70 via a spacer 82.
  • the first flap 70 is mounted eccentrically on a shaft 86, via which the first flap 70 together with the second flap 78 are rotatably arranged in the mixing housing 14.
  • the shaft 86 is disposed outside a Haupt barnströmquerterrorisms the fresh air passage 22 and the exhaust gas recirculation passage 26, so that the flow through the shaft 86 is not disturbed.

Abstract

Die vorliegende Erfindung betrifft ein Kanalsystem (10) für eine Verbrennungskraftmaschine mit einem Mischgehäuse (14) und einem Blow-By Kanal (18), welcher zur Entlüftung eines Kurbelgehäuses der Verbrennungskraftmaschine mit dem Kurbelgehäuse verbunden ist und in das Mischgehäuse (14) mündet. Das Kanalsystem umfasst zusätzlich einem Frischluftkanal (22), der in das Mischgehäuse (14) mündet, über den Frischluft zuführbar ist, einem Abgasrückführkanal (26), der in das Mischgehäuse (14) mündet, über den ein Abgasstrom zuführbar ist, und einem Ansaugkanal (30), über den ein Mischstrom abführbar ist, wobei der Frischluftkanal (22) und der Blow-By Kanal (18) parallel in das Mischgehäuse (14) münden.The present invention relates to a duct system (10) for an internal combustion engine with a mixing housing (14) and a blow-by channel (18), which is connected to the venting of a crankcase of the internal combustion engine with the crankcase and in the mixing housing (14) opens. The duct system additionally comprises a fresh air duct (22), which opens into the mixing housing (14) via which fresh air can be supplied, an exhaust gas recirculation duct (26) which opens into the mixing housing (14), via which an exhaust gas stream can be fed, and an intake duct (30), via which a mixed flow is discharged, wherein the fresh air duct (22) and the blow-by channel (18) open into the mixing housing (14) in parallel.

Description

Die vorliegende Erfindung betrifft ein Kanalsystem für eine Verbrennungskraftmaschine mit einem Mischgehäuse, einem Blow-By Kanal, welcher zur Entlüftung eines Kurbelgehäuses der Verbrennungskraftmaschine mit dem Kurbelgehäuse verbunden ist und in das Mischgehäuse mündet, und einem Frischluftkanal, der in das Mischgehäuse mündet, über den Frischluft zuführbar ist. Das Kanalsystem umfasst weiter einen Abgasrückführkanal, der in das Mischgehäuse mündet, über den ein Abgasstrom zuführbar ist und einen Ansaugkanal, über den ein Mischstrom abführbar ist.The present invention relates to a duct system for an internal combustion engine with a mixing housing, a blow-by channel, which is connected to the venting of a crankcase of the internal combustion engine with the crankcase and opens into the mixing housing, and a fresh air duct, which opens into the mixing housing, over the fresh air can be fed. The duct system further comprises an exhaust gas recirculation channel, which opens into the mixing housing, via which an exhaust gas stream can be fed and an intake duct, via which a mixed stream can be discharged.

Derartige Kanalsysteme sind aus dem Stand der Technik bekannt und dienen bei einem Verbrennungsmotor zur Rückführung von Abgasen zur Verbrennungskraftmaschine. Zusätzlich können solche Kanalsysteme gleichzeitig dazu verwendet werden, Blow-By Gase, welche beim Belüften des Kurbelgetriebegehäuses anfallen zur Verbrennungskraftmaschine zurückzuführen.Such duct systems are known from the prior art and are used in an internal combustion engine for the return of exhaust gases to the internal combustion engine. In addition, such duct systems can be used simultaneously to return blow-by gases, which arise when venting the crankcase to the internal combustion engine.

Aus dem Stand der Technik sind Kanalsysteme bekannt, bei welchen in einen Luftstrom zwischen einer Frischluftkanalmündung und einer Ansaugkanalmündung ein Blow-By Kanal und ein Abgasrückführkanal in das Mischgehäuse münden. In dem Mischgehäuse werden die Frischluft, das Gas des Blow-By Kanals und das rückgeführte Abgas gemischt und zum Ansaugkanal geleitet.Channel systems are known from the prior art, in which a blow-by channel and an exhaust gas recirculation channel open into the mixing housing in an air flow between a fresh air duct mouth and a Ansaugkanalmündung. In the mixing housing, the fresh air, the gas of the blow-by channel and the recirculated exhaust gas are mixed and fed to the intake passage.

Die US 5,611,204 offenbart ein Kanalsystem, bei welchem der Venturi-Effekt genutzt wird, um zu dem Frischluftstrom entweder rückgeführtes Abgas oder Blow-By Gas zuzuleiten.The US 5,611,204 discloses a duct system in which the venturi effect is utilized to supply either recirculated exhaust gas or blow-by gas to the fresh air stream.

Aus der DE 10 2008 043 821 A1 ist ein Kanalsystem bekannt, bei welchem ein Blow-By Kanal in einen Frischluftkanal mündet.From the DE 10 2008 043 821 A1 a channel system is known in which a blow-by channel opens into a fresh air channel.

Die DE 10 2014 114 968 A1 offenbart ein Kanalsystem, bei welchem ein Regelkörper vorgesehen ist, der eine erste Klappe zum Verschließen einer Frischluftmündung und eine zweite Klappe zum Verschließen einer Abgasrückführmündung aufweist. Der Regelkörper regelt einen Frischluftstrom in Abhängigkeit zu einem Abgasstrom. Das Gemisch aus Frischluft und rückgeführtem Abgas wird anschließend im Kanalsystem zu einem Ansaugkanal geleitet.The DE 10 2014 114 968 A1 discloses a duct system in which a control body is provided, which has a first flap for closing a fresh air outlet and a second flap for closing an exhaust gas recirculation orifice. The control body regulates a fresh air flow as a function of an exhaust gas flow. The mixture of fresh air and recirculated exhaust gas is then passed in the duct system to an intake passage.

Bei Kanalsystemen nach dem Stand der Technik besteht das Problem, dass die Strömung im Kanalsystem zu Strömungsgeräuschen am Blow-By Kanal führt.In prior art duct systems, there is the problem that the flow in the duct system results in flow noise at the blow-by duct.

Die Aufgabe der vorliegenden Erfindung liegt somit darin, ein Kanalsystem für eine Verbrennungskraftmaschine zu schaffen, bei welchem es zu einer geringeren Geräuschentwicklung kommt.The object of the present invention is therefore to provide a duct system for an internal combustion engine, in which there is less noise.

Diese Aufgabe wird durch ein Kanalsystem für eine Verbrennungskraftmaschine mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a channel system for an internal combustion engine with the features of claim 1.

Bei dem erfindungsgemäßen Kanalsystem mündet der Frischluftkanal und der Blow-By Kanal parallel in das Mischgehäuse. Die Kanalmittelachsen des Frischluftkanals und des Blow-By Kanals sind somit wenigstens im Bereich der Mündungen in das Mischgehäuse parallel zueinander. Dadurch ist die in das Mischgehäuse eingeleitete Strömung beider Kanäle im Wesentlichen ebenfalls parallel zueinander. Dadurch wird vermieden, dass die Frischluft über die Mündung des Blow-By Kanals strömt. Die bei der Überströmung entstehenden Geräusche werden somit ebenfalls vermieden. Dadurch kann die Geräuschentwicklung in dem Kanalsystem verringert werden.In the channel system according to the invention, the fresh air channel and the blow-by channel opens into the mixing housing in parallel. The channel central axes of the fresh air channel and the blow-by channel are thus parallel to each other at least in the region of the mouths in the mixing housing. As a result, the flow of both channels introduced into the mixing housing is also essentially parallel to one another. This avoids that the fresh air flows over the mouth of the blow-by channel. The resulting noise in the overflow are thus also avoided. Thereby, the noise in the channel system can be reduced.

In einer bevorzugten Ausführung der Erfindung ist im Mischgehäuse ein Regelkörper drehbar angeordnet, welcher eine Strömung des Abgasrückführkanals und des Frischluftkanals abhängig voneinander regelt. Dadurch kann abhängig von dem Lastzustand der Verbrennungskraftmaschine der Anteil der Frischluft und der Anteil des rückgeführten Abgases abhängig voneinander geregelt werden. Dadurch ist es möglich, die rückgeführte Abgasmenge derart zu regeln, dass ein Optimum zwischen maximaler Leistung und maximaler Schadstoffreduktion erzielt wird.In a preferred embodiment of the invention, a control body is rotatably arranged in the mixing housing, which regulates a flow of the exhaust gas recirculation passage and the fresh air passage depending on each other. As a result, depending on the load condition of the Internal combustion engine, the proportion of fresh air and the proportion of recirculated exhaust gas are regulated depending on each other. This makes it possible to regulate the recirculated exhaust gas amount such that an optimum between maximum power and maximum pollutant reduction is achieved.

In einer weiteren bevorzugten Ausführung der Erfindung ist im Mischgehäuse ein Regelkörper drehbar angeordnet, welcher eine Strömung des Frischluftkanals, des Blow-By Kanals und des Abgasrückführkanals abhängig voneinander regelt. Dadurch kann abhängig von dem Lastzustand der Verbrennungskraftmaschine der Anteil der Frischluft, der Anteil des rückgeführten Abgases und der Anteil des Blow-By Gases abhängig voneinander geregelt werden. Dadurch ist es möglich, die rückgeführte Abgasmenge derart zu regeln, dass ein Optimum zwischen maximaler Leistung und maximaler Schadstoffreduktion erzielt wird. Zusätzlich kann vermieden werden, dass es zu einer Übersättigung an Blow-By Gas im Gasgemisch kommt.In a further preferred embodiment of the invention, a control body is rotatably arranged in the mixing housing, which regulates a flow of the fresh air channel, the blow-by channel and the exhaust gas recirculation channel depending on each other. As a result, depending on the load state of the internal combustion engine, the proportion of fresh air, the proportion of recirculated exhaust gas and the proportion of the blow-by gas can be regulated depending on each other. This makes it possible to regulate the recirculated exhaust gas amount such that an optimum between maximum power and maximum pollutant reduction is achieved. In addition, it can be avoided that there is a supersaturation of blow-by gas in the gas mixture.

Vorzugsweise sind ein Blow-By Kanal Austrittsquerschnitt und ein Frischluftkanalaustrittsquerschnitt in einer Ebene angeordnet. Die Ebene kann dabei jeden Winkel zu den Kanalmittelachsen aufweisen. Dadurch wird vermieden, dass es zu einer Überströmung der Blow-By Kanal Mündung kommt. Vorzugsweise ist die Ebene zu den Kanalmittelachsen zur Verbesserung der Regelbarkeit angestellt angeordnet.Preferably, a blow-by channel outlet cross-section and a fresh air duct outlet cross-section are arranged in a plane. The plane can have any angle to the central channel axes. This avoids that there is an overflow of the blow-by channel mouth. Preferably, the plane is arranged to the channel centerlines hired to improve the controllability.

In einer bevorzugten Ausgestaltung der Erfindung ist der Regelkörper exzentrisch an einer Welle befestigt. Dadurch ist eine Anordnung möglich, bei welcher die Welle außerhalb eines Durchströmungsquerschnittes des Abgasrückführkanals angeordnet ist. Im Gegensatz zu einem Beispielsweise Butterfly-Ventil ist mit einem solchen Regelkörper eine druckverlustminimierende Regelung von zwei Kanälen möglich.In a preferred embodiment of the invention, the control body is mounted eccentrically on a shaft. As a result, an arrangement is possible in which the shaft is arranged outside a flow cross-section of the exhaust gas recirculation channel. In contrast to an example Butterfly valve with such a control body a pressure loss minimizing control of two channels is possible.

Vorzugsweise ist der Regelkörper eine Klappe. Eine Klappe ist eine einfache Möglichkeit, um die Strömung des Abgasrückführkanals und des Frischluftkanals abhängig voneinander zu regeln.Preferably, the control body is a flap. A flap is an easy way to regulate the flow of the exhaust gas recirculation channel and the fresh air channel depending on each other.

Vorteilhafterweise weist der Regelkörper eine erste Klappe, die den Frischluftkanal und den Blow-By Kanal regelt, und eine zweite Klappe, die den Abgaskanal regelt, und die mit der ersten Klappe verbunden ist, auf. Durch die Ausführung mit zwei Klappen kann die Anordnung der Welle zum Ventilsitz mit deutlich ungenauerer Toleranz erfolgen.Advantageously, the control body on a first flap, which controls the fresh air passage and the blow-by channel, and a second flap, which regulates the exhaust passage, and which is connected to the first flap on. Due to the design with two flaps, the arrangement of the shaft to the valve seat can be done with significantly less accurate tolerance.

Die Welle ist vorzugsweise außerhalb eines Hauptdurchströmquerschnitts des Frischluftkanals und des Abgasrückführkanals angeordnet. Die Welle liegt somit nicht in der Strömung des Mischstromes im Mischgehäuse in Richtung des Ansaugkanals. Dadurch wird die Strömung nicht durch die Welle gestört, so dass sich ein geringer Strömungswiderstand ergibt, wodurch dass größere Mischstrommengen zum Ansaugkanal und damit zur Verbrennungskraftmaschine abgeführt werden können.The shaft is preferably arranged outside of a Hauptdurchströmquerschnitts the fresh air passage and the exhaust gas recirculation passage. The shaft is thus not in the flow of the mixed stream in the mixing housing in the direction of the intake passage. As a result, the flow is not disturbed by the shaft, resulting in a low flow resistance, which means that larger amounts of mixed stream can be discharged to the intake passage and thus to the internal combustion engine.

In einer besonders vorteilhaften Ausführungsform sind der Frischluftkanal und der Blow-By Kanal in einem einstückigen Anschlussgehäuse integriert. Das Anschlussgehäuse ist dabei ein separates Teil, welches an dem Mischgehäuses befestigbar ist. Für den Blow-By Kanal und den Frischluftkanal ist somit lediglich ein einziges Bauteil notwendig, so dass die Teilezahl reduziert und die Montagezeit verringert wird. Dadurch kann das Kanalsystem wirtschaftlicher hergestellt werden.In a particularly advantageous embodiment, the fresh air duct and the blow-by duct are integrated in a one-piece connection housing. The connection housing is a separate part which can be fastened to the mixing housing. Thus, only a single component is necessary for the blow-by channel and the fresh air channel, so that the number of parts is reduced and the assembly time is reduced. As a result, the channel system can be made more economical.

In einer weiteren bevorzugten Ausbildung ist das Mischgehäuse direkt über eine Flanschfläche mit dem Anschlussgehäuse verbunden. Das Anschlussgehäuse kann dadurch auf einfache Weise mit dem Mischgehäuse verbunden werden, so dass das Kanalsystem noch wirtschaftlicher herstellbar ist.In a further preferred embodiment, the mixing housing is connected directly to the connection housing via a flange surface. The connection housing can be easily connected to the mixing housing, so that the channel system is even more economical to produce.

Vorzugsweise weist das Mischgehäuse drei Flanschflächen auf. An den Flanschflächen sind die in das Mischgehäuse mündenden Kanäle und der aus dem Mischgehäuse austretende Ansaugkanal angeschlossen, wobei für den Blow-By Kanal zusammen mit dem Frischluftkanal lediglich eine Flanschfläche vorgesehen ist. Die Kanäle können über die Flanschflächen auf einfache Weise mit dem Mischgehäuse verbunden werden, so dass das Kanalsystem wirtschaftlicher herstellbar ist.Preferably, the mixing housing has three flange surfaces. At the flange surfaces which open into the mixing housing channels and emerging from the mixing housing intake are connected, wherein for the blow-by channel together with the fresh air duct only a flange is provided. The channels can be connected via the flange easily with the mixing housing, so that the channel system is more economical to produce.

Vorteilhafterweise ist das Mischgehäuse einstückig mit einem Aktorgehäuse ausgebildet, in dem ein Aktor angeordnet ist, über den die Welle des Regelkörpers betätigbar ist. Dadurch wird die Teilezahl reduziert und der Montageaufwand verringert. Das Kanalsystem kann dadurch wirtschaftlicher hergestellt werden.Advantageously, the mixing housing is formed integrally with an actuator housing, in which an actuator is arranged, via which the shaft of the control body is actuated. This reduces the number of parts and reduces assembly costs. The channel system can be made more economical.

Es wird somit ein Kanalsystem für eine Verbrennungskraftmaschine geschaffen, bei welchem durch Vermeidung einer Überströmung des Blow-By Kanals die Geräuschentwicklung minimiert und die Effizienz des Blow-By Kanals erhöht wird.There is thus provided a duct system for an internal combustion engine, in which by avoiding an overflow of the blow-by channel, the noise is minimized and the efficiency of the blow-by channel is increased.

Weitere Einzelheiten und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung des Ausführungsbeispiels in Verbindung mit den Zeichnungen. In diesen zeigen:

Figur 1:
Perspektivische Ansicht eines Ausführungsbeispiels eines erfindungsgemäßen Kanalsystems,
Figur 2:
Seitenansicht des vertikal geschnittenen Kanalsystems nach Figur 1, und
Figur 3:
Perspektivische Ansicht des vertikal geschnittenen Kanalsystems nach Figur 1.
Further details and advantages of the present invention will become apparent from the following description of the embodiment in conjunction with the drawings. In these show:
FIG. 1:
Perspective view of an embodiment of a channel system according to the invention,
FIG. 2:
Side view of the vertically cut channel system according to FIG. 1 , and
FIG. 3:
Perspective view of the vertically cut channel system after FIG. 1 ,

Die Figur 1 zeigt eine perspektivische Ansicht eines erfindungsgemäßen Kanalsystems 10 für eine Verbrennungskraftmaschine. Das Kanalsystem 10 weist ein Mischgehäuse 14 auf, in welches ein Blow-By Kanal 18, ein Frischluftkanal 22, über den Frischluft zuführbar ist und ein Abgasrückführkanal 26, der Abgas zu der Verbrennungskraftmaschine zurückführt, münden. Zur Entlüftung eines Kurbelgehäuses der Verbrennungskraftmaschine verbindet der Blow-By Kanal 18 das Kurbelgehäuse mit dem Mischgehäuse 14. Ein in dem Mischgehäuse 14 gebildeter Mischstrom aus Blow-By Gas, Frischluft und rückgeführtem Abgas ist über einen mit dem Mischgehäuse 14 verbundenen Ansaugkanal 30 abführbar.The FIG. 1 shows a perspective view of a channel system 10 according to the invention for an internal combustion engine. The duct system 10 has a mixing housing 14 into which a blow-by duct 18, a fresh air duct 22, can be supplied via the fresh air and an exhaust gas recirculation duct 26, which recirculates exhaust gas to the internal combustion engine, open. For venting a crankcase of the internal combustion engine, the blow-by channel 18 connects the crankcase with the mixing housing 14. A mixed flow of blow-by gas, fresh air and recirculated exhaust gas formed in the mixing housing 14 can be discharged via an intake passage 30 connected to the mixing housing 14.

Das Mischgehäuse 14 bildet eine Flanschfläche 34 aus, an welcher ein einstückiges Anschlussgehäuse 38 über Schrauben 42 (eine Schraube 42 beispielhaft dargestellt) anbringbar ist. An dem Anschlussgehäuse 38 sind ein Blow-By Anschlussstutzen 46 und ein Frischluftanschlussstutzen 50 angeordnet, welche einen Teil des Blow-By Kanals 18 bzw. des Frischluftkanals 22 ausbilden. Blow-By Anschlussstutzen 46 und Frischluftanschlussstutzen 50 sind am Anschlussgehäuse 38 im Wesentlichen rechtwinklig zueinander angeordnet.The mixing housing 14 forms a flange surface 34, to which an integral connection housing 38 can be attached by means of screws 42 (a screw 42 is shown by way of example). On the connection housing 38, a blow-by connection piece 46 and a fresh air connection piece 50 are arranged, which form part of the blow-by channel 18 and the fresh air channel 22. Blow-By connection piece 46 and fresh air connection piece 50 are arranged at the connection housing 38 substantially at right angles to each other.

Figur 2 zeigt eine Seitenansicht des vertikal geschnittenen Kanalsystems 10. Diese Figur zeigt, dass der Blow-By Kanal 18 um ca. 90° abknickt, so dass der Blow-By Kanal 18 und der Frischluftkanal 22, die im Wesentlichen rechtwinklig zueinander im Anschlussgehäuse 38 integriert sind, parallel in das Mischgehäuse 14 münden. Eine Blow-By Kanal Mittelachse 51 ist somit im Bereich einer Blow-By Kanal Mündung 52 parallel zu einer Frischluftkanalmittelachse 53 angeordnet. An einem freien Ende einer Frischluftkanalmündung 54 und an einem freien Ende der Blow-By Kanal Mündung 52 ist ein Blow-By Kanal Austrittsquerschnitt 55 bzw. ein Frischluftkanalaustrittsquerschnitt 56 angeordnet. Der Blow-By Kanal Austrittsquerschnitt 55 und der Frischluftkanalaustrittsquerschnitt 56 sind zusätzlich in einer Ebene 58 angeordnet, wodurch eine Überströmung der Blow-By Kanal Mündung 52 durch einen Frischluftstrom vermieden wird. FIG. 2 shows a side view of the vertically cut channel system 10. This figure shows that the blow-by channel 18 is bent by approximately 90 °, so that the blow-by channel 18 and the fresh air channel 22, which are substantially perpendicular to each other in the connection housing 38 integrated , Open parallel to the mixing housing 14. A blow-by channel central axis 51 is thus arranged in the region of a blow-by channel opening 52 parallel to a fresh air channel center axis 53. At a free end of a fresh air duct mouth 54 and at a free end of the blow-by duct mouth 52, a blow-by duct outlet cross-section 55 and a fresh air duct outlet cross-section 56 is arranged. The blow-by channel outlet cross-section 55 and the Fresh air duct outlet cross-section 56 are additionally arranged in a plane 58, whereby an overflow of the blow-by duct mouth 52 is avoided by a fresh air flow.

In dem Mischgehäuse 14 ist eine als Regelkörper 66 vorgesehene erste Klappe 70 angeordnet, welche die Strömung aus dem Blow-By Kanal 18 und dem Frischluftkanal 22 regelt. Die erste Klappe 70 ist in Form einer Zunge ausgebildet (siehe Figur 3), mit welcher die Blow-By Kanal Mündung 52 bzw. die Frischluftkanalmündung 54 zu verschließen oder zu öffnen ist. Im Bereich der Blow-By Kanal Mündung 52 weist die erste Klappe 70 eine geringere Breite B auf, als im Bereich der Frischluftkanalmündung 54. Die in Figur 2 gezeigte erste Klappe 70 ist in einer mittleren Stellung dargestellt, bei welcher die Blow-By Kanal Mündung 52 bzw. die Frischluftkanalmündung 54 nicht vollkommen geöffnet oder geschlossen sind. Der Regelkörper 66 weist zusätzlich eine zweite Klappe 78 auf, welche den Öffnungsquerschnitt des Abgasrückführkanals 26 regelt und an der ersten Klappe 70 über ein Distanzstück 82 befestigt ist.In the mixing housing 14 is provided as a control body 66 first flap 70 is arranged, which regulates the flow from the blow-by channel 18 and the fresh air duct 22. The first flap 70 is in the form of a tongue (see FIG. 3 ), with which the blow-by channel mouth 52 and the fresh air duct mouth 54 to close or open. In the area of the blow-by channel mouth 52, the first flap 70 has a smaller width B than in the region of the fresh-air channel mouth 54 FIG. 2 shown first flap 70 is shown in a middle position in which the blow-by channel mouth 52 and the fresh air duct mouth 54 are not fully open or closed. The control body 66 additionally has a second flap 78, which regulates the opening cross section of the exhaust gas recirculation channel 26 and is fastened to the first flap 70 via a spacer 82.

Die erste Klappe 70 ist exzentrisch an einer Welle 86 befestigt, über die die erste Klappe 70 zusammen mit der zweiten Klappe 78 drehbar in dem Mischgehäuse 14 angeordnet sind. Die Welle 86 ist außerhalb eines Hauptdurchströmquerschnitts des Frischluftkanals 22 und des Abgasrückführkanals 26 angeordnet, so dass die Strömung durch die Welle 86 nicht gestört wird.The first flap 70 is mounted eccentrically on a shaft 86, via which the first flap 70 together with the second flap 78 are rotatably arranged in the mixing housing 14. The shaft 86 is disposed outside a Hauptdurchströmquerschnitts the fresh air passage 22 and the exhaust gas recirculation passage 26, so that the flow through the shaft 86 is not disturbed.

Bei dem beschriebenen erfindungsgemäßen Kanalsystem wird eine Überströmung der Blow-By Kanal Mündung vermieden, so dass keine Geräusche auftreten, die bei einer Überströmung entstehen würden. Die Geräuschentwicklung des Kanalsystems wird dadurch erheblich reduziert und die Effizienz der Blow-By Einleitung verbessert.In the described channel system according to the invention, an overflow of the blow-by channel mouth is avoided so that no noise would occur that would arise in an overflow. The noise of the channel system is thereby significantly reduced and improves the efficiency of the blow-by introduction.

Es sollte deutlich sein, dass der Schutzbereich nicht auf das beschriebene Kanalsystem beschränkt ist, sondern verschiedene Modifikationen und konstruktive Änderungen denkbar sind. Beispielsweise ist eine Ausgestaltung denkbar, bei welcher der Blow-By Kanal und der Frischluftkanal parallel in das Anschlussgehäuse geführt werden, so dass ein Abknicken des Blow-By Kanals nicht notwendig ist. Auch sind verschiedene Ausgestaltungen für die erste und die zweite Klappe denkbar.It should be clear that the scope of protection is not limited to the described channel system, but various modifications and design changes are conceivable. For example, a configuration is conceivable in which the blow-by channel and the fresh air duct are guided in parallel in the connection housing, so that a kinking of the blow-by channel is not necessary. Also, various embodiments for the first and the second flap are conceivable.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Kanalsystemchannel system
1414
Mischgehäusemixed housing
1818
Blow-By KanalBlow-by channel
2222
FrischluftkanalFresh air duct
2626
AbgasrückführkanalExhaust gas recirculation passage
3030
Ansaugkanalintake port
3434
Flanschflächeflange
3838
Anschlussgehäuseconnection housing
4242
Schraubescrew
4646
Blow-By AnschlussstutzenBlow-by connection
5050
FrischluftanschlussstutzenFresh air connection
5151
Blow-By Kanal MittelachseBlow-by channel central axis
5252
Blow-By Kanal MündungBlow-by channel mouth
5353
FrischluftkanalmittelachseFresh air duct central axis
5454
FrischluftkanalmündungFresh air duct opening
5555
Blow-By Kanal AustrittsquerschnittBlow-by channel outlet cross-section
5656
FrischluftkanalaustrittsquerschnittFresh air duct outlet cross section
5858
Ebenelevel
6666
Regelkörpercontrol body
7070
erste Klappefirst flap
7878
zweite Klappesecond flap
8282
Distanzstückspacer
8686
Wellewave
BB
Breitewidth

Claims (12)

Kanalsystem (10) für eine Verbrennungskraftmaschine mit: - einem Mischgehäuse (14), - einem Blow-By Kanal (18), welcher zur Entlüftung eines Kurbelgehäuses der Verbrennungskraftmaschine mit dem Kurbelgehäuse verbunden ist und in das Mischgehäuse (14) mündet, - einem Frischluftkanal (22), der in das Mischgehäuse (14) mündet, über den Frischluft zuführbar ist, - einem Abgasrückführkanal (26), der in das Mischgehäuse (14) mündet, über den ein Abgasstrom zuführbar ist, - einem Ansaugkanal (30), über den ein Mischstrom abführbar ist, dadurch gekennzeichnet, dass
der Frischluftkanal (22) und der Blow-By Kanal (18) parallel in das Mischgehäuse (14) münden.Channel system (10) for an internal combustion engine with: a mixing housing (14), - A blow-by channel (18) which is connected to the venting of a crankcase of the internal combustion engine with the crankcase and in the mixing housing (14) opens, a fresh air channel (22) which opens into the mixing housing (14) via which fresh air can be supplied, an exhaust gas recirculation channel (26) which opens into the mixing housing (14), via which an exhaust gas stream can be fed, - An intake passage (30) via which a mixed stream is discharged, characterized in that
the fresh air duct (22) and the blow-by channel (18) open into the mixing housing (14) in parallel. Kanalsystem (10) nach Anspruch 1, dadurch gekennzeichnet, dass im Mischgehäuse (14) ein Regelkörper (66) drehbar angeordnet ist, welcher eine Strömung des Abgasrückführkanals (26) und des Frischluftkanals (22) abhängig voneinander regelt.Duct system (10) according to claim 1, characterized in that in the mixing housing (14) a control body (66) is rotatably arranged, which regulates a flow of the exhaust gas recirculation passage (26) and the fresh air passage (22) depending on each other. Kanalsystem (10) nach Anspruch 1, dadurch gekennzeichnet, dass im Mischgehäuse (14) ein Regelkörper (66) drehbar angeordnet ist, welcher eine Strömung des Frischluftkanals (22), des Blow-By Kanals (18) und des Abgasrückführkanals (26) abhängig voneinander regelt.Duct system (10) according to claim 1, characterized in that in the mixing housing (14) a control body (66) is rotatably disposed, which a flow of the fresh air duct (22), the blow-by channel (18) and the exhaust gas recirculation passage (26) governs each other. Kanalsystem (10) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass ein Blow-By Kanal Austrittsquerschnitt (54) und ein Frischluftkanalaustrittsquerschnitt (56) in einer Ebene (58) angeordnet sind.Duct system (10) according to any one of the preceding claims, characterized in that a blow-by channel outlet cross-section (54) and a fresh air duct outlet cross-section (56) in a plane (58) are arranged. Kanalsystem (10) nach einem der Ansprüche 2-4, dadurch gekennzeichnet, dass der Regelkörper (66) exzentrisch an einer Welle (86) befestigt ist.Channel system (10) according to any one of claims 2-4, characterized in that the control body (66) is mounted eccentrically on a shaft (86). Kanalsystem (10) nach einem der Ansprüche 2-5, dadurch gekennzeichnet, dass der Regelkörper (66) eine Klappe (70) ist.Channel system (10) according to any one of claims 2-5, characterized in that the control body (66) is a flap (70). Kanalsystem (10) nach Anspruch 6, dadurch gekennzeichnet, dass der Regelkörper (66) eine erste Klappe (70), die den Frischluftkanal und den Blow-By Kanal (18) regelt, und eine zweite Klappe (78), die den Abgasrückführkanal (26) regelt, und die mit der ersten Klappe (70) verbunden ist, aufweist.A duct system (10) according to claim 6, characterized in that the control body (66) controls a first flap (70) which controls the fresh air passage and the blow-by passage (18) and a second flap (78) which controls the exhaust gas return passage (8). 26) and connected to the first flap (70). Kanalsystem (10) nach einem der Ansprüche 5-7, dadurch gekennzeichnet, dass die Welle (86) außerhalb eines Hauptdurchströmquerschnitts des Frischluftkanals (22) und des Abgasrückführkanals (26) angeordnet ist.Duct system (10) according to any one of claims 5-7, characterized in that the shaft (86) outside a Hauptdurchströmquerschnitts the fresh air passage (22) and the exhaust gas recirculation passage (26) is arranged. Kanalsystem (10) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Frischluftkanal (22) und der Blow-By Kanal (18) in einem einstückigen Anschlussgehäuse (38) integriert sind.Duct system (10) according to any one of the preceding claims, characterized in that the fresh air duct (22) and the blow-by channel (18) are integrated in a one-piece connection housing (38). Kanalsystem (10) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Mischgehäuse (14) direkt über eine Flanschfläche (34) mit dem Anschlussgehäuse (38) verbunden ist.Duct system (10) according to one of the preceding claims, characterized in that the mixing housing (14) directly is connected via a flange (34) with the connection housing (38). Kanalsystem (10) nach Anspruch 10, dadurch gekennzeichnet, dass das Mischgehäuse (14) drei Flanschflächen (34) aufweist.Duct system (10) according to claim 10, characterized in that the mixing housing (14) has three flange surfaces (34). Kanalsystem (10) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Mischgehäuse (14) einstückig mit einem Aktorgehäuse ausgebildet ist, in dem ein Aktor angeordnet ist, über den die Welle (86) des Regelkörpers (66) betätigbar ist.Duct system (10) according to any one of the preceding claims, characterized in that the mixing housing (14) is integrally formed with an actuator housing, in which an actuator is arranged, via which the shaft (86) of the control body (66) is actuated.
EP17193450.8A 2016-09-29 2017-09-27 Channel system for a combustion engine Active EP3301290B1 (en)

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