EP1645748A1 - Suction device of engine for a vehicle - Google Patents

Suction device of engine for a vehicle Download PDF

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Publication number
EP1645748A1
EP1645748A1 EP05020204A EP05020204A EP1645748A1 EP 1645748 A1 EP1645748 A1 EP 1645748A1 EP 05020204 A EP05020204 A EP 05020204A EP 05020204 A EP05020204 A EP 05020204A EP 1645748 A1 EP1645748 A1 EP 1645748A1
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EP
European Patent Office
Prior art keywords
air
air filter
intake system
internal combustion
combustion engine
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.)
Withdrawn
Application number
EP05020204A
Other languages
German (de)
French (fr)
Inventor
Thomas Howe
Wolfgang Lewerenz
Jörg MIROLL
Berndt Schütz
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1645748A1 publication Critical patent/EP1645748A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • 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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1294—Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation
    • 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
    • F02M35/14—Combined air cleaners and silencers
    • 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
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face

Definitions

  • the invention relates to an intake system for an internal combustion engine having a raw air duct leading into a raw air side of an air filter and having a clean air duct leading from a clean air side of the air filter to the internal combustion engine according to the type further defined in the preamble of claim 1. Furthermore, the invention relates to a motor vehicle.
  • a generic intake system is known from DE 100 34 479 A1.
  • the intake system at several points on several branches, which can suck in addition to the actual intake combustion air.
  • effects are to be achieved, which lead to a damping of the intake noise in the passenger compartment or affect the characteristics of the interior noise.
  • this is only possible to a limited extent.
  • the inventive taper of the at least one additional line results in a significantly improved sound radiation to the outside of the air filter, so that it can be dispensed with the previously considered necessary reinforcing elements. Furthermore, it is ensured by the invention, flow-unfavorable construction, that in normal operation of the internal combustion engine, the vast amount of the intake air is sucked through the raw air line and a suction via the additional line only in the event of a possible blockage of the raw air line.
  • the air sucked through the additional line from the engine compartment and thus preheated air can accelerate the thawing of the snow or ice and ensure that the engine in full time the full power available stands.
  • the described flow-unfavorable design of the additional line can be reinforced in an advantageous development of the invention that the additional line opens into the raw air side of the air filter, that the flow within the additional line is at least approximately opposite to the flow within the clean air line.
  • a motor vehicle with an internal combustion engine and an intake system according to the invention is specified in claim 9.
  • FIG. 1 shows very schematically a motor vehicle 1 with an internal combustion engine 3 arranged in an engine compartment 2 thereof.
  • the internal combustion engine 3 has an intake system 4, which in turn has a raw air duct 5, an air filter 6 and a clean air duct 7.
  • the crude air duct 5 extends between an intake opening 8 and the air filter 6 and the clean air duct 7 extends from the air filter 6 to the internal combustion engine 3.
  • the arrangement of the individual components is to be regarded as purely schematic and it is quite common, the air filter 6 on the internal combustion engine. 3 to arrange.
  • the air filter 6 of the intake system 4 is shown in more detail in FIG.
  • the air filter 6 has a filter element 9, which divides the air filter 6 into a raw air side 10, into which the raw air duct 5 opens, and into a clean air side 11, from which the clean air duct 7 originates.
  • the filter element 9 is used in a conventional manner to filter the incoming via the raw air duct 5 in the air filter 6 intake air to the internal combustion engine 3 to deliver clean air as possible.
  • additional line 12 line opens at least approximately on the opposite side of the junction of the raw air duct 5 in the unfiltered air side 10 of the air filter 6.
  • the internal combustion engine 3 can also suck in air, wherein the additional line 12, however, is formed so strömungsun mars that the majority of the intake air is sucked in via the raw air duct 5.
  • the additional line 12 starting from the engine compartment 2 in the direction of the unfiltered air side 10 of the air filter 6 tapers and thus forms a flow obstacle for the incoming air.
  • the additional line 12 is thus designed conical, wherein the smaller diameter is located within the air filter 6.
  • the sound generated within the air filter 6 through the intake can pass outwards in the direction of a passenger compartment 13 of the motor vehicle 1 shown in FIG. 1.
  • a partition wall 14 Between the additional line 12 and the passenger compartment 13 is a partition wall 14, to which the sound emitted by the air filter 6 impinges.
  • this acts for the sound as a diffuser, so that the sound radiation from the air filter 6 is improved.
  • the additional line 12 represents an additional inlet into the air filter 6 in those cases in which the suction port 8 of the clean air line 7 is clogged with snow or ice.
  • the additional line 12 for example, the heated by the not shown exhaust system of the engine 3 air from the engine compartment 2 into the air filter 6 or sucked, which leads to a melting of the snow or ice due to the high temperature of the air in the engine compartment 2 , As soon as the suction opening 8 is freed of snow or ice in this way, due to the more favorable flow conditions prevailing there, the air supplied to the internal combustion engine 3 is sucked in substantially only via the raw air line 5.
  • the possible flows within the air filter 6 are indicated in FIG. 2 by means of arrows.
  • the noise emission depends on the power and the rotational speed of the internal combustion engine 3 and generates in the passenger compartment 13 a sporty sound underlining the engine power.
  • this sound can be influenced or tuned.
  • the extending within the air filter 6 length of the additional line 12 can be changed, resulting in a transmission of different frequencies.
  • the shape of the additional line 12 is a compromise between a low flow rate through the same and a good radiation behavior for the sound generated in the air filter 6.
  • the length of the additional line 12 within the air filter 6 also influences the heat conducted in the direction of the intake opening 8.
  • the additional line 12 extends partially within and partially outside of the air filter 6. In a manner not shown, it would also be possible that the additional line 12 extends completely within or completely outside of the air filter 6. The greater the proportion of the additional line 12, which runs inside the air filter 6, the lower is the space required by the same in the engine compartment 2.
  • the additional line 12 opens into the raw air side 10 such that the flow within the additional line 12 at least is approximately opposite to the flow within the clean air line 7.
  • the warm air flowing in via the additional line 12 must first be deflected by approximately 180 ° in order to reach the internal combustion engine 3. This supports the flow-unfavorable execution of the additional line 12.
  • the air filter 6 facing opening of the additional line 12 is formed as a Venturi nozzle.
  • auxiliary line 12 is made in common with the air filter 6, i. that the additional line 12 and the air filter 6 are integrally formed with each other. Furthermore, a separate production of the additional line 12 and the air filter 6 is conceivable, in which case the additional line 12 is connected to the air filter 6, for example, by screwing or another suitable connection.
  • the air filter 6 has two clean air ducts 7 leading to the respective cylinder banks of the internal combustion engine 3.
  • two independent Roh Kunststoff einen 5 and accordingly also two additional lines 12 may be provided.
  • two or more additional lines 12 may be provided on the air filter 6.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The suction system of internal combustion engine has raw air side (10), which discharges raw air into air filters (6) through raw air pipe (5) and the clean air side (11) of the air filter provides the clean air to the internal combustion engine through clean air pipe (11). Outgoing auxiliary pipe (12) from the engine compartment is tapered towards the direction of clean air side of air filter. The raw airside from the internal combustion engine flows to the surrounding of engine compartment. An independent claim is also include for motor vehicle.

Description

Die Erfindung betrifft ein Ansaugsystem für eine Brennkraftmaschine mit einer in eine Rohluftseite eines Luftfilters einmündenden Rohluftleitung und mit einer von einer Reinluftseite des Luftfilters zu der Brennkraftmaschine führenden Reinluftleitung nach der im Oberbegriff von Anspruch 1 näher definierten Art. Des weiteren betrifft die Erfindung ein Kraftfahrzeug.The invention relates to an intake system for an internal combustion engine having a raw air duct leading into a raw air side of an air filter and having a clean air duct leading from a clean air side of the air filter to the internal combustion engine according to the type further defined in the preamble of claim 1. Furthermore, the invention relates to a motor vehicle.

Ein gattungsgemäßes Ansaugsystem ist aus der DE 100 34 479 A1 bekannt. Hierbei weist das Ansaugsystem an verschiedenen Stellen mehrere Abzweigungen auf, welche zusätzlich zur eigentlichen Ansaugöffnung Verbrennungsluft ansaugen können. Dadurch sollen Effekte erzielt werden, die zu einer Dämpfung des Ansauggeräusches in der Fahrgastzelle führen oder die Charakteristik des Innenraumgeräusches beeinflussen. Mit der dort beschriebenen Konstruktion ist dies jedoch nur begrenzt möglich.A generic intake system is known from DE 100 34 479 A1. Here, the intake system at several points on several branches, which can suck in addition to the actual intake combustion air. As a result, effects are to be achieved, which lead to a damping of the intake noise in the passenger compartment or affect the characteristics of the interior noise. With the construction described there, however, this is only possible to a limited extent.

Ein Luftansaugsystem mit einer Primär- und einer Sekundäransaugleitung ist in der DE 87 15 030 U1 beschrieben. Hierbei kann, beispielsweise wenn die Öffnung der Primäransaugleitung mit Schnee, Dreck oder ähnlichem verstopft ist, mittels einer Klappe auf die Sekundäransaugleitung umgeschaltet werden.An air intake system with a primary and a secondary intake is described in DE 87 15 030 U1. Here, for example, when the opening of the Primäräaugaugleitung is clogged with snow, dirt or the like, be switched by means of a flap on the Sekundärransaugleitung.

Ein ähnliches System, welches jedoch ohne Umschaltklappe betrieben werden kann, ist in der DE 44 08 097 A1 beschrieben.A similar system, which, however, can be operated without switching flap, is described in DE 44 08 097 A1.

Auch mit diesen Konstruktionen ist eine gezielte Beeinflussung des von der Brennkraftmaschine erzeugten bzw. in den Fahrgastraum übertragenen Geräusches nicht möglich.Even with these constructions, a targeted influencing of the noise generated by the internal combustion engine or transmitted to the passenger compartment is not possible.

Bezüglich Vorrichtungen, die den Fahrer über den Betriebszustand der Brennkraftmaschine akustisch informieren, wird auf die DE 44 35 296 A1 und die DE 197 04 376 A1 verwiesen.With regard to devices that inform the driver about the operating condition of the internal combustion engine acoustically, reference is made to DE 44 35 296 A1 and DE 197 04 376 A1.

Es ist Aufgabe der vorliegenden Erfindung, ein Ansaugsystem für eine Brennkraftmaschine zu schaffen, welches mit einfachen Mitteln eine gezielte Übertragung des von der Brennkraftmaschine erzeugten Ansauggeräusches in den Fahrgastraum ermöglicht.It is an object of the present invention to provide an intake system for an internal combustion engine, which allows a simple transfer of the generated by the internal combustion engine intake noise into the passenger compartment.

Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst.According to the invention, this object is achieved by the features mentioned in claim 1.

Durch die erfindungsgemäße Verjüngung der wenigstens einen Zusatzleitung ergibt sich eine erheblich verbesserte Schallabstrahlung nach außerhalb des Luftfilters, so dass auf die bislang für erforderlich gehaltenen Verstärkungselemente verzichtet werden kann. Des weiteren wird durch die erfindungsgemäße, strömungsungünstige Konstruktion sichergestellt, dass im normalen Betrieb der Brennkraftmaschine die überwiegende Menge der angesaugten Luft über die Rohluftleitung angesaugt wird und eine Ansaugung über die Zusatzleitung nur im Falle einer eventuellen Verstopfung der Rohluftleitung erfolgt.The inventive taper of the at least one additional line results in a significantly improved sound radiation to the outside of the air filter, so that it can be dispensed with the previously considered necessary reinforcing elements. Furthermore, it is ensured by the invention, flow-unfavorable construction, that in normal operation of the internal combustion engine, the vast amount of the intake air is sucked through the raw air line and a suction via the additional line only in the event of a possible blockage of the raw air line.

Insbesondere wenn die Ansaugöffnung der Rohluftleitung mit Schnee oder Eis verstopft ist, kann die über die Zusatzleitung aus dem Motorraum angesaugte und somit vorgewärmte Luft das Auftauen des Schnees bzw. des Eises beschleunigen und dafür sorgen, dass der Brennkraftmaschine in kürzerer Zeit die volle Leistung zur Verfügung steht.In particular, when the intake of the raw air duct is clogged with snow or ice, the air sucked through the additional line from the engine compartment and thus preheated air can accelerate the thawing of the snow or ice and ensure that the engine in full time the full power available stands.

Die beschriebene strömungsungünstige Gestaltung der Zusatzleitung kann in einer vorteilhaften Weiterbildung der Erfindung dadurch verstärkt werden, dass die Zusatzleitung derart in die Rohluftseite des Luftfilters mündet, dass die Strömung innerhalb der Zusatzleitung wenigstens annähernd entgegengerichtet zu der Strömung innerhalb der Reinluftleitung ist.The described flow-unfavorable design of the additional line can be reinforced in an advantageous development of the invention that the additional line opens into the raw air side of the air filter, that the flow within the additional line is at least approximately opposite to the flow within the clean air line.

Ein Kraftfahrzeug mit einer Brennkraftmaschine und einem erfindungsgemäßen Ansaugsystem ist in Anspruch 9 angegeben.A motor vehicle with an internal combustion engine and an intake system according to the invention is specified in claim 9.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den restlichen Unteransprüchen. Nachfolgend ist ein Ausführungsbeispiel der Erfindung anhand der Zeichnung prinzipmäßig beschrieben.Further advantageous embodiments and modifications of the invention will become apparent from the remaining dependent claims. Hereinafter, an embodiment of the invention will be described in principle with reference to the drawing.

Dabei zeigen:

Fig. 1
eine Draufsicht auf das erfindungsgemäße Ansaugsystem; und
Fig. 2
einen Schnitt durch den Luftfilter des erfindungsgemäßen Ansaugsystems.
Showing:
Fig. 1
a plan view of the intake system according to the invention; and
Fig. 2
a section through the air filter of the intake system according to the invention.

In Fig. 1 ist sehr schematisch ein Kraftfahrzeug 1 mit einer in einem Motorraum 2 desselben angeordneten Brennkraftmaschine 3 dargestellt. Die Brennkraftmaschine 3 weist ein Ansaugsystem 4 auf, welches seinerseits eine Rohluftleitung 5, einen Luftfilter 6 und eine Reinluftleitung 7 aufweist. Hierbei verläuft die Rohluftleitung 5 zwischen einer Ansaugöffnung 8 und dem Luftfilter 6 und die Reinluftleitung 7 verläuft von dem Luftfilter 6 zu der Brennkraftmaschine 3. Die Anordnung der einzelnen Bauteile ist als rein schematisch anzusehen und es ist durchaus üblich, den Luftfilter 6 auf der Brennkraftmaschine 3 anzuordnen.FIG. 1 shows very schematically a motor vehicle 1 with an internal combustion engine 3 arranged in an engine compartment 2 thereof. The internal combustion engine 3 has an intake system 4, which in turn has a raw air duct 5, an air filter 6 and a clean air duct 7. Here, the crude air duct 5 extends between an intake opening 8 and the air filter 6 and the clean air duct 7 extends from the air filter 6 to the internal combustion engine 3. The arrangement of the individual components is to be regarded as purely schematic and it is quite common, the air filter 6 on the internal combustion engine. 3 to arrange.

Der Luftfilter 6 des Ansaugsystems 4 ist in Fig. 2 detaillierter dargestellt. So weist der Luftfilter 6 ein Filterelement 9 auf, welches den Luftfilter 6 in eine Rohluftseite 10, in die die Rohluftleitung 5 mündet, und in eine Reinluftseite 11 aufteilt, von der die Reinluftleitung 7 ausgeht. Das Filterelement 9 dient in an sich bekannter Weise dazu, die über die Rohluftleitung 5 in den Luftfilter 6 einströmende Ansaugluft zu filtern, um der Brennkraftmaschine 3 möglichst saubere Luft zuführen zu können.The air filter 6 of the intake system 4 is shown in more detail in FIG. Thus, the air filter 6 has a filter element 9, which divides the air filter 6 into a raw air side 10, into which the raw air duct 5 opens, and into a clean air side 11, from which the clean air duct 7 originates. The filter element 9 is used in a conventional manner to filter the incoming via the raw air duct 5 in the air filter 6 intake air to the internal combustion engine 3 to deliver clean air as possible.

In Fig. 2 ist des weiteren erkennbar, dass von dem Motorraum 2 eine weitere, im folgenden als Zusatzleitung 12 bezeichnete Leitung wenigstens annähernd auf der gegenüberliegenden Seite der Einmündung der Rohluftleitung 5 in die Rohluftseite 10 des Luftfilters 6 einmündet. Über die Zusatzleitung 12 kann die Brennkraftmaschine 3 ebenfalls Luft ansaugen, wobei die Zusatzleitung 12 jedoch derart strömungsungünstig ausgebildet ist, dass der Großteil der Ansaugluft über die Rohluftleitung 5 angesaugt wird. Im vorliegenden Fall wird dies dadurch erreicht, dass sich die Zusatzleitung 12 ausgehend von dem Motorraum 2 in Richtung der Rohluftseite 10 des Luftfilters 6 verjüngt und somit ein Strömungshindernis für die einströmende Luft bildet. Die Zusatzleitung 12 ist also konisch ausgeführt, wobei der kleinere Durchmesser sich innerhalb des Luftfilters 6 befindet. Durch die Zusatzleitung 12 kann der innerhalb des Luftfilters 6 durch die Ansaugung erzeugte Schall nach außen in Richtung eines in Fig. 1 dargestellten Fahrgastraum 13 des Kraftfahrzeugs 1 gelangen. Zwischen der Zusatzleitung 12 und dem Fahrgastraum 13 befindet sich eine Trennwand 14, an der der von dem Luftfilter 6 emittierte Schall auftrifft. Durch die beschriebene konische Ausführung der Zusatzleitung 12 wirkt diese für den Schall wie ein Diffusor, sodass die Schallabstrahlung aus dem Luftfilter 6 verbessert wird.In Fig. 2 it is further seen that of the engine compartment 2 another, hereinafter referred to as additional line 12 line opens at least approximately on the opposite side of the junction of the raw air duct 5 in the unfiltered air side 10 of the air filter 6. Via the additional line 12, the internal combustion engine 3 can also suck in air, wherein the additional line 12, however, is formed so strömungsungünstig that the majority of the intake air is sucked in via the raw air duct 5. In the present case, this is achieved in that the additional line 12, starting from the engine compartment 2 in the direction of the unfiltered air side 10 of the air filter 6 tapers and thus forms a flow obstacle for the incoming air. The additional line 12 is thus designed conical, wherein the smaller diameter is located within the air filter 6. Through the additional line 12, the sound generated within the air filter 6 through the intake can pass outwards in the direction of a passenger compartment 13 of the motor vehicle 1 shown in FIG. 1. Between the additional line 12 and the passenger compartment 13 is a partition wall 14, to which the sound emitted by the air filter 6 impinges. By the described conical design of the additional line 12, this acts for the sound as a diffuser, so that the sound radiation from the air filter 6 is improved.

Eine weitere Funktion der Zusatzleitung 12 besteht darin, dass sie in denjenigen Fällen, in denen die Ansaugöffnung 8 der Reinluftleitung 7 mit Schnee oder Eis verstopft ist, einen zusätzlichen Einlass in den Luftfilter 6 darstellt. Dabei wird über die Zusatzleitung 12 die beispielsweise durch die nicht dargestellte Abgasanlage der Brennkraftmaschine 3 erwärmte Luft aus dem Motorraum 2 in den Luftfilter 6 geleitet bzw. gesaugt, was aufgrund der hohen Temperatur der Luft in dem Motorraum 2 zu einem Schmelzen des Schnees bzw. Eises führt. Sobald die Ansaugöffnung 8 auf diese Weise von Schnee bzw. Eis befreit ist, wird aufgrund der dort vorherrschenden günstigeren Strömungsverhältnisse die der Brennkraftmaschine 3 zugeführte Luft im wesentlichen nur noch über die Rohluftleitung 5 angesaugt. Die möglichen Strömungen innerhalb des Luftfilters 6 sind in Fig. 2 mittels Pfeilen angedeutet.Another function of the additional line 12 is that it represents an additional inlet into the air filter 6 in those cases in which the suction port 8 of the clean air line 7 is clogged with snow or ice. there On the additional line 12, for example, the heated by the not shown exhaust system of the engine 3 air from the engine compartment 2 into the air filter 6 or sucked, which leads to a melting of the snow or ice due to the high temperature of the air in the engine compartment 2 , As soon as the suction opening 8 is freed of snow or ice in this way, due to the more favorable flow conditions prevailing there, the air supplied to the internal combustion engine 3 is sucked in substantially only via the raw air line 5. The possible flows within the air filter 6 are indicated in FIG. 2 by means of arrows.

Die Geräuschabstrahlung ist abhängig von der Leistung und der Drehzahl der Brennkraftmaschine 3 und generiert im Fahrgastraum 13 einen sportlichen, die Motorleistung unterstreichenden Klang. Durch Veränderung der Länge und/oder des Querschnitts der Zusatzleitung 12 kann dieser Klang beeinflusst bzw. abgestimmt werden. Unter anderem kann hierzu die innerhalb des Luftfilters 6 verlaufende Länge der Zusatzleitung 12 verändert werden, was zu einer Übertragung unterschiedlicher Frequenzen führt. Die Form der Zusatzleitung 12 ist dabei ein Kompromiss zwischen einer geringen Durchsatzmenge durch dieselbe und einem guten Abstrahlverhalten für den in dem Luftfilter 6 generierten Schall. Des weiteren wird durch die Länge der Zusatzleitung 12 innerhalb des Luftfilters 6 auch die in Richtung der Ansaugöffnung 8 geleitete Wärme beeinflusst. Im vorliegenden Fall verläuft die Zusatzleitung 12 teilweise innerhalb und teilweise außerhalb des Luftfilters 6. In nicht dargestellter Weise wäre es auch möglich, dass die Zusatzleitung 12 vollständig innerhalb oder vollständig außerhalb des Luftfilters 6 verläuft. Je größer der Anteil der Zusatzleitung 12 ist, der innerhalb Luftfilters 6 verläuft, desto geringer wird der von derselben in dem Motorraum 2 beanspruchte Bauraum.The noise emission depends on the power and the rotational speed of the internal combustion engine 3 and generates in the passenger compartment 13 a sporty sound underlining the engine power. By changing the length and / or the cross section of the additional line 12, this sound can be influenced or tuned. Among other things, for this purpose, the extending within the air filter 6 length of the additional line 12 can be changed, resulting in a transmission of different frequencies. The shape of the additional line 12 is a compromise between a low flow rate through the same and a good radiation behavior for the sound generated in the air filter 6. Furthermore, the length of the additional line 12 within the air filter 6 also influences the heat conducted in the direction of the intake opening 8. In the present case, the additional line 12 extends partially within and partially outside of the air filter 6. In a manner not shown, it would also be possible that the additional line 12 extends completely within or completely outside of the air filter 6. The greater the proportion of the additional line 12, which runs inside the air filter 6, the lower is the space required by the same in the engine compartment 2.

Die Zusatzleitung 12 mündet derart in die Rohluftseite 10, dass die Strömung innerhalb der Zusatzleitung 12 wenigstens annähernd entgegengerichtet zu der Strömung innerhalb der Reinluftleitung 7 ist. Dadurch muss die über die Zusatzleitung 12 einströmende warme Luft zunächst um ca. 180° umgelenkt werden, um zu der Brennkraftmaschine 3 zu gelangen. Dies unterstützt die strömungsungünstige Ausführung der Zusatzleitung 12. In nicht dargestellter Weise wäre es außerdem möglich, dass die dem Luftfilter 6 zugewandte Öffnung der Zusatzleitung 12 als Venturi-Düse ausgebildet ist.The additional line 12 opens into the raw air side 10 such that the flow within the additional line 12 at least is approximately opposite to the flow within the clean air line 7. As a result, the warm air flowing in via the additional line 12 must first be deflected by approximately 180 ° in order to reach the internal combustion engine 3. This supports the flow-unfavorable execution of the additional line 12. In a manner not shown, it would also be possible that the air filter 6 facing opening of the additional line 12 is formed as a Venturi nozzle.

Es kann vorgesehen sein, dass die Zusatzleitung 12 gemeinsam mit dem Luftfilter 6 hergestellt wird, d.h. dass die Zusatzleitung 12 und der Luftfilter 6 einstückig miteinander ausgeführt sind. Des weiteren ist auch eine separate Herstellung der Zusatzleitung 12 und des Luftfilters 6 denkbar, wobei dann die Zusatzleitung 12 beispielsweise durch Verschrauben oder eine andere geeignete Verbindungsart mit dem Luftfilter 6 verbunden wird.It may be provided that the auxiliary line 12 is made in common with the air filter 6, i. that the additional line 12 and the air filter 6 are integrally formed with each other. Furthermore, a separate production of the additional line 12 and the air filter 6 is conceivable, in which case the additional line 12 is connected to the air filter 6, for example, by screwing or another suitable connection.

In dem Fall, in dem die Brennkraftmaschine 3 in V-Bauweise ausgeführt ist, weist der Luftfilter 6 zwei zu den jeweiligen Zylinderbänken der Brennkraftmaschine 3 führende Reinluftleitungen 7 auf. Selbstverständlich können in diesem Fall auch zwei voneinander unabhängige Rohluftleitungen 5 und dementsprechend auch zwei Zusatzleitungen 12 vorgesehen sein. Auch in allen anderen Fällen können jedoch zwei oder mehr Zusatzleitungen 12 an dem Luftfilter 6 vorgesehen sein.In the case in which the internal combustion engine 3 is designed in V-construction, the air filter 6 has two clean air ducts 7 leading to the respective cylinder banks of the internal combustion engine 3. Of course, in this case, two independent Rohluftleitungen 5 and accordingly also two additional lines 12 may be provided. In all other cases, however, two or more additional lines 12 may be provided on the air filter 6.

Claims (9)

Ansaugsystem für eine Brennkraftmaschine mit einer in eine Rohluftseite eines Luftfilters einmündenden Rohluftleitung und mit einer von einer Reinluftseite des Luftfilters zu der Brennkraftmaschine führenden Reinluftleitung, wobei in die Rohluftseite eine weitere, von einem die Brennkraftmaschine umgebenden Motorraum ausgehende Zusatzleitung mündet,
dadurch gekennzeichnet,
dass die von dem Motorraum (2) ausgehende Zusatzleitung (12) sich in Richtung der Reinluftseite (11) des Luftfilters (6) verjüngt.Intake system for an internal combustion engine with a raw air duct leading into a blank air side of an air filter and with a leading from a clean air side of the air filter to the internal combustion engine clean air duct, in the unfiltered air side another, emanating from an engine compartment surrounding the engine engine outgoing additional line,
characterized,
that the radiation emanating from the engine compartment (2) additional conduit (12) tapers of the air filter (6) towards the clean air side (11). Ansaugsystem nach Anspruch 1,
dadurch gekennzeichnet,
dass die Zusatzleitung (12) wenigstens annähernd auf der gegenüberliegenden Seite der Einmündung der Rohluftleitung (5) in die Rohluftseite (10) des Luftfilters (6) mündet.Intake system according to claim 1,
characterized,
that the additional line (12) opens at least approximately on the opposite side of the mouth of the raw air duct (5) in the unfiltered air side (10) of the air filter (6). Ansaugsystem nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass die Zusatzleitung (12) derart in die Rohluftseite (10) des Luftfilters (6) mündet, dass die Strömung innerhalb der Zusatzleitung (12) wenigstens annähernd entgegengerichtet zu der Strömung innerhalb der Reinluftleitung (7) ist.Intake system according to claim 1 or 2,
characterized,
that the supplementary line (12) in such a manner flows into the upstream side (10) of the air filter (6), that the flow in the additional conduit (12) at least approximately opposite direction to the flow within the clean air duct (7). Ansaugsystem nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
dass die Zusatzleitung (12) zumindest über einen Teil ihrer Länge innerhalb der Rohluftseite (10) des Luftfilters (6) verläuft.An intake system according to claim 1, 2 or 3,
characterized,
that the supplementary line (12) extends at least over part of its length within the upstream side (10) of the air filter (6). Ansaugsystem nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass die in die Rohluftseite (10) des Luftfilters (6) ragende Mündung der Zusatzleitung (12) als Venturi-Rohr ausgebildet ist.Intake system according to one of claims 1 to 4,
characterized,
that in the unfiltered air side (10) of the air filter (6) projecting mouth of the additional line (12) is designed as a Venturi tube. Ansaugsystem nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass der Luftfilter (6) ein die Rohluftseite (10) von der Reinluftseite (11) trennendes Filterelement (9) aufweist.Intake system according to one of claims 1 to 5,
characterized,
that the air filter (6) comprises the raw air side (10) from the clean air side (11) separating the filter element (9). Ansaugsystem nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass die Zusatzleitung (12) einstückig mit dem Luftfilter (6) ausgebildet ist.Intake system according to one of claims 1 to 6,
characterized,
that the additional line (12) is formed integrally with the air filter (6). Ansaugsystem nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass die Zusatzleitung (12) als separates Bauteil ausgebildet und mit dem Luftfilter (6) verbunden ist.Intake system according to one of claims 1 to 6,
characterized,
that the additional line (12) is formed as a separate component and connected to the air filter (6). Kraftfahrzeug mit einer Brennkraftmaschine und mit einem Ansaugsystem nach einem der Ansprüche 1 bis 8.Motor vehicle with an internal combustion engine and with an intake system according to one of claims 1 to 8.
EP05020204A 2004-10-09 2005-09-16 Suction device of engine for a vehicle Withdrawn EP1645748A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004049273A DE102004049273A1 (en) 2004-10-09 2004-10-09 Intake system for an internal combustion engine

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EP (1) EP1645748A1 (en)
DE (1) DE102004049273A1 (en)

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US20060075988A1 (en) 2006-04-13

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