EP0771939B1 - Silencer with variable damping characteristics - Google Patents

Silencer with variable damping characteristics Download PDF

Info

Publication number
EP0771939B1
EP0771939B1 EP96116731A EP96116731A EP0771939B1 EP 0771939 B1 EP0771939 B1 EP 0771939B1 EP 96116731 A EP96116731 A EP 96116731A EP 96116731 A EP96116731 A EP 96116731A EP 0771939 B1 EP0771939 B1 EP 0771939B1
Authority
EP
European Patent Office
Prior art keywords
pressure
piston rod
silencer according
valve
closing element
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.)
Expired - Lifetime
Application number
EP96116731A
Other languages
German (de)
French (fr)
Other versions
EP0771939A1 (en
Inventor
Thomas Olszok
Frieder Kunz
Bernd Fuhrman
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.)
Tenneco GmbH
Original Assignee
Heinrich Gillet GmbH
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 Heinrich Gillet GmbH filed Critical Heinrich Gillet GmbH
Publication of EP0771939A1 publication Critical patent/EP0771939A1/en
Application granted granted Critical
Publication of EP0771939B1 publication Critical patent/EP0771939B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/16Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe

Definitions

  • the invention relates to variable silencers Damping characteristic for pulsating gases according to the Preamble of claim 1.
  • Such a silencer is known from DE-U 94 05 771.
  • This silencer is used for opening and Closing a tube carrying the pulsating exhaust gases a valve plate that is attached to a piston rod, which performs a linear movement.
  • the piston rod itself is attached to the membrane of a pressure cell.
  • the Overpressure side of the membrane is the pressure inside the Muffler supplied, preferably via an in the piston rod integrated pressure line.
  • a compression spring supports the membrane against excess pressure.
  • the low pressure side the membrane stands over a housing opening with the Atmosphere in connection.
  • This arrangement is chosen so that the valve plate in The gas pipe closes the idle state.
  • the Hibernation corresponds to a slight overpressure in the Silencer against atmospheric pressure. If the Internal pressure in the silencer due to an increase in the Gas flow, so moves the force generated by the overpressure the membrane against the sum of the forces of the support spring and Atmospheric pressure and the valve disc have been there so far closed exhaust pipe free.
  • the present invention has for its object a Mufflers of the type mentioned above to that effect improve that a variety of influencing factors can be taken into account, however, the simple Basic principle, especially the absence of an external one Control unit, and the use of a simple, reliable mechanics, are retained.
  • the solution according to the invention provides for operating the Closing element on the piston rod an actuation box before, the multiple membranes, multiple chambers and multiple Has pressure connections.
  • the number of Chambers and thus the control pressures that can be taken into account be of any size, although in practice one Restriction is inevitable that the stroke, the one Can run membrane maximum, is mechanically limited.
  • the essential advantage of the present invention is based on the fact that the pressure side of one, preferably the first membrane the total pressure, the low pressure side of this Membrane fed the static pressure of the muffler becomes. This compensates for the different ones Flow resistances of the different types of silencers and possibly downstream damper and the support spring only needs to be matched to the flow rate be on the valve closing element the gas pipe should open or close.
  • the present invention the possibility of a chamber of Actuating box through a housing bore with the atmosphere to connect. In this way for example, the higher the altitude Decreasing air pressure in the control of the sea level Include valve closing element.
  • the effect of a certain pressure value on the opening and Closing characteristics of the valve closing element can by changing the corresponding membrane area vary.
  • Valve closing element can have different effects in terms of acoustic properties and Achieve gas flow inside the silencer.
  • this is Valve closing element a plate, as it comes from the beginning mentioned DE-U 94 05 771 is known, with the help of which End of a gas-carrying pipe can be closed.
  • the piston rod can also two such valve plates can be attached. These can different diameters and / or different Have orientation. In the latter case, they offer the Possibility of a first gas-carrying pipe and in the idle state a second gas-carrying pipe in the active state close or release.
  • valve closing element is a hollow cylinder that moves in the exhaust pipe to perforated pipe areas or branching there Pipes, for example the neck of a Helmholtz resonator, to lock or release.
  • a third alternative embodiment also uses a cylinder, but with the bottom closed, so that too the gas flow through the tube in which the cylinder is moved, can be cordoned off overall.
  • Fig. 1 shows a silencer with switchable Damping characteristic according to the state of the art.
  • the Muffler has a housing 2, the inside of which With the help of two partitions 22, 24 divided into three chambers is.
  • An exhaust gas feed pipe 3.1 leads from the gas inlet 1 the housing 2 into, an exhaust pipe 3.2 leads on Gas outlet 7 out of the housing 2.
  • the end of The supply pipe 3.1 is by means of a valve plate 5 locked.
  • valve plate 5 is seated on a piston rod 13 which in turn is part of a pressure can 10.
  • the exhaust gas flows through the branch pipe 3.3 in the first expansion chamber 21 in the housing 2, by a Another gas pipe 3.4 in the third expansion chamber 25, of there through perforations in the partition 24 in the middle Expansion chamber 23, where it is in the discharge pipe 3.2 enters to leave the housing 2 at the gas outlet 7.
  • Fig. 2 shows in an enlarged, half-cut Representation of an actuation box 10 with four chambers 14.1, 14.2, 14.3, 14.4, divided by three membranes 11.1, 11.2, 11.3, which in turn each have a support spring 12.1, 12.2, 12.3 are supported.
  • Each of the four chambers 14.1 ... 14.4 has its own pressure connection 15.1, 15.2, 15.3, 15.4.
  • a piston rod 13 is with the foremost membrane 11.1 connected.
  • the piston rod 13 is drilled twice. These holes lead to pressure connections 15.1, 15.2 in front of and behind the first membrane 11.1.
  • the one pressure line 6.1 opens into Head of the piston rod 13 and takes up the total gas pressure.
  • the other pressure line 6.2 opens laterally in the Piston rod 13 with a sufficient distance from the head of the Piston rod 13 or to the valve plate 5.1 and takes the static pressure inside the silencer.
  • the first membrane 11.1 acts Difference of these two pressures, which is the square of the Exhaust gas flow rate is proportional.
  • the individual flow resistance of each Muffler is compensated.
  • the strength of the support spring 12.1 can therefore only be used for Exhaust gas flow rate can be adjusted at the valve plate 5.1 should open.
  • the third chamber 14.3 can have a negative pressure fed from the intake tract of an internal combustion engine to be with the throttle valve closed, d. H. in the Thrust operation, a certain position of the valve plate 5.1 to force.
  • the fourth chamber 14.4 can via its pressure connection 15.4 for example in connection with the free atmosphere stay around in this way with increasing altitude decreasing atmospheric pressure in the Include tax characteristics.
  • actuating box 10 basically with further chambers, pressure connections, membranes and Support springs can be run if necessary should and the membranes for the strokes then required be dimensioned.
  • Fig. 3 shows an embodiment of an actuation box 10 with three chambers 14.1 ... 14.3 and two membranes 11.1, 11.2.
  • the two foremost chambers 14.1, 14.2 are like already explained by the piston rod 13 integrated pressure lines 6.1, 6.2 supplied with pressure.
  • On the third chamber 14.3 is an external pressure line 6.3 connected.
  • Fig. 5 shows a second application example.
  • a valve disk 5.1 for opening and Closing the gas supply pipe 3.1 provided.
  • the gas pipe 3.1 is with a perforated area 2.6 provided by the hollow cylinder 5.4 more or less closed, so the acoustics of the silencer.
  • Fig. 6 shows a third application example.
  • the Piston rod 13 are two valve plates 5.1, 5.2 with different diameters attached. This correspond to two concentric tubes 3.1, 3.4, the second valve plate 5.2 located inside the second tube 3.4 can move until the first valve plate 5.1 closes the outer gas-carrying pipe 3.1.
  • valve plates 5.1, 5.2 also can be dimensioned and positioned so that the first valve plate 5.1 inside the first tube 3.1 can be moved while the second valve plate 5.2 closes or releases the end of the second gas pipe 3.4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

Die Erfindung betrifft Schalldämpfer mit variabler Dämpfungscharakteristik für pulsierende Gase gemäß dem Oberbegriff des Anspruchs 1.The invention relates to variable silencers Damping characteristic for pulsating gases according to the Preamble of claim 1.

Ein derartiger Schalldämpfer ist bekannt aus der DE-U 94 05 771. Dieser Schalldämpfer verwendet zum Öffnen und Schließen eines die pulsierenden Abgase führenden Rohres einen Ventilteller, der an einer Kolbenstange befestigt ist, die eine lineare Bewegung ausführt. Die Kolbenstange selbst ist an der Membran einer Druckdose befestigt. Der Überdruckseite der Membran wird der Druck im Inneren des Schalldämpfers zugeführt, und zwar bevorzugt über eine in die Kolbenstange integrierte Druckleitung. Eine Druckfeder stützt die Membran gegen den Überdruck. Die Niederdruckseite der Membran steht über eine Gehäuseöffnung mit der Atmosphäre in Verbindung.Such a silencer is known from DE-U 94 05 771. This silencer is used for opening and Closing a tube carrying the pulsating exhaust gases a valve plate that is attached to a piston rod, which performs a linear movement. The piston rod itself is attached to the membrane of a pressure cell. The Overpressure side of the membrane is the pressure inside the Muffler supplied, preferably via an in the piston rod integrated pressure line. A compression spring supports the membrane against excess pressure. The low pressure side the membrane stands over a housing opening with the Atmosphere in connection.

Diese Anordnung ist so gewählt, daß der Ventilteller im Ruhezustand das gasführende Rohr verschließt. Der Ruhezustand entspricht einem geringen Überdruck im Schalldämpfer gegenüber dem Atmosphärendruck. Steigt der Innendruck im Schalldämpfer, bedingt durch eine Erhöhung des Gasdurchflusses, so bewegt die vom Überdruck erzeugte Kraft die Membran gegen die Summe der Kräfte von Stützfeder und Atmosphärendruck und der Ventilteller gibt das bisher verschlossene Abgasrohr frei.This arrangement is chosen so that the valve plate in The gas pipe closes the idle state. The Hibernation corresponds to a slight overpressure in the Silencer against atmospheric pressure. If the Internal pressure in the silencer due to an increase in the Gas flow, so moves the force generated by the overpressure the membrane against the sum of the forces of the support spring and Atmospheric pressure and the valve disc have been there so far closed exhaust pipe free.

Da jeder Schalldämpfer aufgrund der baulichen Gegebenheiten einen ganz spezifischen Strömungswiderstand besitzt, aus dem sich der individuelle Schwellwert des Überdrucks, bei dem sich der Ventilteller zu bewegen beginnt, ergeben muß, müssen die Stützfedern jeweils angepaßt werden. Dies ist aufwendig. Des weiteren hat sich gezeigt, daß in besonderen Fällen, beispielsweise wenn das gasführende Rohr bei Überschreiten des Druckschwellwertes nicht geöffnet, sondern geschlossen werden soll, in der Praxis Fehlfunktionen auftreten können, wenn der Schalldämpfer in einem Kraftfahrzeug eingesetzt ist, dessen Motorsteuerung im Schubbetrieb sowohl die Treibstoff- als auch die Luftzufuhr absperrt.Because every silencer is due to the structural conditions has a very specific flow resistance from which the individual threshold value of the excess pressure at which the valve disc begins to move, must result, the support springs must be adjusted in each case. This is complex. Furthermore, it has been shown that in particular Cases, for example when the gas pipe If the pressure threshold is not exceeded, it is open to be closed, malfunction in practice can occur when the muffler is in a Motor vehicle is used, the engine control in Overrun both the fuel and air supply cordoned off.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Schalldämpfer der eingangs genannten Art dahingehend zu verbessern, daß eine Vielzahl von Einflußgrößen berücksichtigt werden kann, wobei jedoch das einfache Grundprinzip, insbesondere der Verzicht auf ein externes Steuergerät, und die Verwendung einer einfachen, betriebssicheren Mechanik, erhalten bleiben.The present invention has for its object a Mufflers of the type mentioned above to that effect improve that a variety of influencing factors can be taken into account, however, the simple Basic principle, especially the absence of an external one Control unit, and the use of a simple, reliable mechanics, are retained.

Diese Aufgabe wird gelöst durch einen Schalldämpfer mit den Merkmalen des Anspruchs 1.This problem is solved by a silencer with the Features of claim 1.

Die erfindungsgemäße Lösung sieht zur Betätigung des Schließelementes an der Kolbenstange eine Betätigungsdose vor, die mehrere Membranen, mehrere Kammern und mehrere Druckanschlüsse besitzt. Im Prinzip kann die Zahl der Kammern und damit der berücksichtigbaren Steuerdrücke beliebig groß sein, wenngleich in der Praxis eine Beschränkung dadurch unumgänglich ist, daß der Hub, den eine Membran maximal ausführen kann, mechanisch begrenzt ist. Der wesentliche Vorteil der vorliegenden Erfindung beruht auf der Tatsache, daß der Überdruckseite einer, vorzugsweise der ersten Membran der Gesamtdruck, der Niederdruckseite dieser Membran der statische Druck des Schalldämpfers zugeführt wird. Dadurch kompensieren sich die unterschiedlichen Strömungswiderstände der verschiedenen Schalldämpfertypen und eventuell nachgeschalteter Dämpfer und die Stützfeder muß nur noch auf die Strömungsgeschwindigkeit abgestimmt werden, an der das Ventilschließelement das gasführende Rohr öffnen bzw. schließen soll.The solution according to the invention provides for operating the Closing element on the piston rod an actuation box before, the multiple membranes, multiple chambers and multiple Has pressure connections. In principle, the number of Chambers and thus the control pressures that can be taken into account be of any size, although in practice one Restriction is inevitable that the stroke, the one Can run membrane maximum, is mechanically limited. The essential advantage of the present invention is based on the fact that the pressure side of one, preferably the first membrane the total pressure, the low pressure side of this Membrane fed the static pressure of the muffler becomes. This compensates for the different ones Flow resistances of the different types of silencers and possibly downstream damper and the support spring only needs to be matched to the flow rate be on the valve closing element the gas pipe should open or close.

Dank der Mehrzahl von Membranen und Kammern können weitere Steuerdrücke angelegt werden. Beispielsweise kann man aus dem Ansaugtrakt eines Verbrennungsmotors den Unterdruck abnehmen und in eine der Kammern der Betätigungsdose leiten. Auf diese Weise ist es möglich, im Schubbetrieb eines Verbrennungsmotors eine bestimmte, funktionsgerechte Position des Ventilschließelementes zu erzwingen.Thanks to the large number of membranes and chambers, others can Control pressures are created. For example, one can the intake tract of an internal combustion engine the negative pressure remove and direct into one of the chambers of the actuation box. In this way it is possible to overrun one Internal combustion engine a certain, functional To force the position of the valve closing element.

Falls es für die Funktion erforderlich ist, bietet auch die vorliegende Erfindung die Möglichkeit, eine Kammer der Betätigungsdose über eine Gehäusebohrung mit der Atmosphäre in Verbindung zu bringen. Auf diese Weise läßt sich beispielsweise der mit zunehmender Höhe über dem Meeresspiegel abnehmende Luftdruck in die Steuerung des Ventilschließelementes einbeziehen.If it is necessary for the function, the present invention the possibility of a chamber of Actuating box through a housing bore with the atmosphere to connect. In this way for example, the higher the altitude Decreasing air pressure in the control of the sea level Include valve closing element.

Die Wirkung eines bestimmten Druckwertes auf die Öffnungs- und Schließcharakteristik des Ventilschließelementes läßt sich durch Verändern der entsprechenden Membranfläche variieren.The effect of a certain pressure value on the opening and Closing characteristics of the valve closing element can by changing the corresponding membrane area vary.

Auch durch unterschiedliche Ausgestaltung des Ventilschließelementes lassen sich unterschiedliche Effekte hinsichtlich der akustischen Eigenschaften und der Gasführung im Inneren des Schalldämpfers erzielen.Also by different design of the Valve closing element can have different effects in terms of acoustic properties and Achieve gas flow inside the silencer.

Gemäß einer ersten Ausgestaltung ist das Ventilschließelement ein Teller, wie er aus der eingangs genannten DE-U 94 05 771 bekannt ist, mit dessen Hilfe das Ende eines gasführenden Rohres verschlossen werden kann. According to a first embodiment, this is Valve closing element a plate, as it comes from the beginning mentioned DE-U 94 05 771 is known, with the help of which End of a gas-carrying pipe can be closed.

Gemäß einer Weiterbildung können auf der Kolbenstange auch zwei derartige Ventilteller angebracht sein. Diese können unterschiedliche Durchmesser und/oder unterschiedliche Orientierung haben. Im letzteren Falle bieten sie die Möglichkeit, im Ruhezustand ein erstes gasführendes Rohr und im Aktivzustand ein zweites gasführendes Rohr zu verschließen bzw. freizugeben.According to a further development, the piston rod can also two such valve plates can be attached. these can different diameters and / or different Have orientation. In the latter case, they offer the Possibility of a first gas-carrying pipe and in the idle state a second gas-carrying pipe in the active state close or release.

Eine alternative Ausgestaltung des Ventilschließelementes ist ein Hohlzylinder, der im abgasführenden Rohr bewegt wird, um dort perforierte Rohrbereiche oder auch abzweigende Rohre, beispielsweise den Hals eines Helmholtz-Resonators, zu verschließen bzw. freizugeben.An alternative embodiment of the valve closing element is a hollow cylinder that moves in the exhaust pipe to perforated pipe areas or branching there Pipes, for example the neck of a Helmholtz resonator, to lock or release.

Eine dritte alternative Ausführungsform verwendet ebenfalls einen Zylinder, jedoch mit geschlossenem Boden, so daß auch der Gasfluß durch däs Rohr, in dem der Zylinder bewegt wird, insgesamt abgesperrt werden kann.A third alternative embodiment also uses a cylinder, but with the bottom closed, so that too the gas flow through the tube in which the cylinder is moved, can be cordoned off overall.

Anhand der Zeichnung soll die Erfindung in Form von Ausführungsbeispielen näher erläutert werden. Es zeigen

Fig. 1
einen Abgasschalldämpfer gemäß dem Stand der Technik mit einem Ventilteller zum Öffnen und Verschließen eines abgasführenden Rohres, betätigt durch eine Druckdose,
Fig. 2
eine Betätigungsdose mit vier Kammern und drei Membranen,
Fig. 3
eine Betätigungsdose mit drei Kammern und zwei Membranen,
Fig. 4
ein Anwendungsbeispiel für ein Schließelement mit zwei Ventiltellern,
Fig.5
ein Anwendungsbeispiel für ein Schließelement mit Hohlzylinder und Ventilteller und
Fig.6
ein Anwendungsbeispiel für ein Schließelement mit zwei Ventiltellern mit unterschiedlichem Durchmesser.
The invention will be explained in more detail in the form of exemplary embodiments with reference to the drawing. Show it
Fig. 1
an exhaust silencer according to the prior art with a valve disk for opening and closing an exhaust pipe, actuated by a pressure cell,
Fig. 2
an actuation box with four chambers and three membranes,
Fig. 3
an actuation box with three chambers and two membranes,
Fig. 4
an application example for a closing element with two valve plates,
Fig. 5
an application example for a closing element with hollow cylinder and valve plate and
Fig. 6
an application example for a closing element with two valve plates with different diameters.

Fig. 1 zeigt einen Schalldämpfer mit umschaltbarer Dämpfungscharakteristik gemäß dem Stand der Technik. Der Schalldämpfer besitzt ein Gehäuse 2, dessen Inneres mit Hilfe zweier Trennwände 22, 24 in drei Kammern unterteilt ist. Vom Gaseinlaß 1 führt ein Abgas-Zuleitungsrohr 3.1 in das Gehäuse 2 hinein, ein Abgas-Ableitungsrohr 3.2 führt am Gasauslaß 7 aus dem Gehäuse 2 heraus. Das Ende des Zuleitungsrohrs 3.1 ist mit Hilfe eines Ventiltellers 5 verschlossen.Fig. 1 shows a silencer with switchable Damping characteristic according to the state of the art. The Muffler has a housing 2, the inside of which With the help of two partitions 22, 24 divided into three chambers is. An exhaust gas feed pipe 3.1 leads from the gas inlet 1 the housing 2 into, an exhaust pipe 3.2 leads on Gas outlet 7 out of the housing 2. The end of The supply pipe 3.1 is by means of a valve plate 5 locked.

Der Ventilteller 5 sitzt an einer Kolbenstange 13, die ihrerseits Teil einer Druckdose 10 ist.The valve plate 5 is seated on a piston rod 13 which in turn is part of a pressure can 10.

Ist das Ende des Zuleitungsrohrs 3.1 versperrt, wie in Fig. 1 dargestellt, strömt das Abgas über das Zweigrohr 3.3 in die erste Expansionskammer 21 im Gehäuse 2, durch ein weiteres Gasrohr 3.4 in die dritte Expansionskammer 25, von dort durch Perforationen in der Trennwand 24 in die mittlere Expansionskammer 23, wo es in das Ableitungsrohr 3.2 eintritt, um am Gasauslaß 7 das Gehäuse 2 zu verlassen.If the end of the supply pipe 3.1 is blocked, as in Fig. 1, the exhaust gas flows through the branch pipe 3.3 in the first expansion chamber 21 in the housing 2, by a Another gas pipe 3.4 in the third expansion chamber 25, of there through perforations in the partition 24 in the middle Expansion chamber 23, where it is in the discharge pipe 3.2 enters to leave the housing 2 at the gas outlet 7.

Ist das Ende des Zuleitungsrohrs 3.1 geöffnet, strömt das Abgas aufgrund des geringeren Strömungswiderstandes direkt in die dritte Expansionskammer 25, durch die Perforationen in der Trennwand 24 in die mittlere Expansionskammer 23 und durch das Ableitungsrohr 3.2 aus dem Schalldämpfergehäuse 2 heraus.If the end of the supply pipe 3.1 is open, this flows Exhaust gas directly due to the lower flow resistance into the third expansion chamber 25, through the perforations in the partition 24 in the middle expansion chamber 23 and through the discharge pipe 3.2 from the muffler housing 2 out.

Fig. 2 zeigt in vergrößerter, halb aufgeschnittener Darstellung eine Betätigungsdose 10 mit vier Kammern 14.1, 14.2, 14.3, 14.4, unterteilt durch drei Membranen 11.1, 11.2, 11.3, die ihrerseits von je einer Stützfeder 12.1, 12.2, 12.3 abgestützt sind. Jede der vier Kammern 14.1 ... 14.4 besitzt einen eigenen Druckanschluß 15.1, 15.2, 15.3, 15.4. Eine Kolbenstange 13 ist mit der vordersten Membran 11.1 verbunden. Auf ihr ist als Beispiel für ein Schließelement ein Ventilteller 5.1 befestigt.Fig. 2 shows in an enlarged, half-cut Representation of an actuation box 10 with four chambers 14.1, 14.2, 14.3, 14.4, divided by three membranes 11.1, 11.2, 11.3, which in turn each have a support spring 12.1, 12.2, 12.3 are supported. Each of the four chambers 14.1 ... 14.4 has its own pressure connection 15.1, 15.2, 15.3, 15.4. A piston rod 13 is with the foremost membrane 11.1 connected. On it is an example of a Closing element attached to a valve plate 5.1.

Die Kolbenstange 13 ist zweifach angebohrt. Diese Bohrungen führen zu Druckanschlüssen 15.1, 15.2 vor bzw. hinter der ersten Membran 11.1. Die eine Druckleitung 6.1 mündet im Kopf der Kolbenstange 13 und nimmt den Gasgesamtdruck auf. Die andere Druckleitung 6.2 mündet seitlich in der Kolbenstange 13 mit ausreichendem Abstand zum Kopf der Kolbenstange 13 bzw. zum Ventilteller 5.1 und nimmt den statischen Druck im Inneren des Schalldämpfers auf. Auf diese Weise wirkt auf die erste Membran 11.1 nur die Differenz dieser beiden Drücke, die dem Quadrat der Strömungsgeschwindigkeit der Abgase proportional ist. Der individuelle Strömungswiderstand des jeweiligen Schalldämpfers ist kompensiert. Die Stärke der Stützfeder 12.1 kann daher ausschließlich auf die Strömungsgeschwindigkeit der Abgase abgestimmt werden, bei der der Ventilteller 5.1 öffnen soll.The piston rod 13 is drilled twice. These holes lead to pressure connections 15.1, 15.2 in front of and behind the first membrane 11.1. The one pressure line 6.1 opens into Head of the piston rod 13 and takes up the total gas pressure. The other pressure line 6.2 opens laterally in the Piston rod 13 with a sufficient distance from the head of the Piston rod 13 or to the valve plate 5.1 and takes the static pressure inside the silencer. On this way only the first membrane 11.1 acts Difference of these two pressures, which is the square of the Exhaust gas flow rate is proportional. The individual flow resistance of each Muffler is compensated. The strength of the support spring 12.1 can therefore only be used for Exhaust gas flow rate can be adjusted at the valve plate 5.1 should open.

An die Druckanschlüsse 15.3, 15.4 der weiteren Kammern 14.3, 14.4 können weitere Steuerdrücke angeschlossen werden. Beispielsweise kann der dritten Kammer 14.3 ein Unterdruck aus dem Ansaugtrakt eines Verbrennungsmotors zugeführt werden, um bei geschlossener Drosselklappe, d. h. im Schubbetrieb, eine bestimmte Position des Ventiltellers 5.1 zu erzwingen.To the pressure connections 15.3, 15.4 of the further chambers 14.3, 14.4 further control pressures can be connected. For example, the third chamber 14.3 can have a negative pressure fed from the intake tract of an internal combustion engine to be with the throttle valve closed, d. H. in the Thrust operation, a certain position of the valve plate 5.1 to force.

Die vierte Kammer 14.4 kann über ihren Druckanschluß 15.4 beispielsweise mit der freien Atmosphäre in Verbindung bleiben, um auf diese Weise den mit zunehmender Höhe über dem Meeresspiegel abnehmenden Atmosphärendruck in die Steuercharakteristik einzubeziehen.The fourth chamber 14.4 can via its pressure connection 15.4 for example in connection with the free atmosphere stay around in this way with increasing altitude decreasing atmospheric pressure in the Include tax characteristics.

Es versteht sich, daß die Betätigungsdose 10 grundsätzlich mit weiteren Kammern, Druckanschlüssen, Membranen und Stützfedern ausgeführt werden kann, wenn dies nötig sein sollte und die Membranen für die dann erforderlichen Hübe dimensioniert werden.It is understood that the actuating box 10 basically with further chambers, pressure connections, membranes and Support springs can be run if necessary should and the membranes for the strokes then required be dimensioned.

Um die von einem bestimmten Druck ausgeübte Kraft beeinflussen zu können, empfiehlt es sich, die Membranflächen zu variieren, die Federeigenschaften jedoch unverändert zu lassen.The force exerted by a certain pressure To be able to influence, it is recommended that Vary membrane areas, but the spring properties to leave unchanged.

Fig. 3 zeigt ein Ausführungsbeispiel einer Betätigungsdose 10 mit drei Kammern 14.1 ... 14.3 und zwei Membranen 11.1, 11.2. Die beiden vordersten Kammern 14.1, 14.2 werden wie schon erläutert durch die in die Kolbenstange 13 integrierten Druckleitungen 6.1, 6.2 mit Druck versorgt. An die dritte Kammer 14.3 ist eine externe Druckleitung 6.3 angeschlossen. Fig. 3 shows an embodiment of an actuation box 10 with three chambers 14.1 ... 14.3 and two membranes 11.1, 11.2. The two foremost chambers 14.1, 14.2 are like already explained by the piston rod 13 integrated pressure lines 6.1, 6.2 supplied with pressure. On the third chamber 14.3 is an external pressure line 6.3 connected.

Fig.4 zeigt auf der Kolbenstange 13 zwei spiegelbildlich zueinander orientierte Ventilteller 5.1, 5.2, von denen jeder ein ihm zugeordnetes Rohr 3.3, 3.4 öffnet bzw. verschließt. Das durch das Zuleitungsrohr 3.1 einströmende Gas fließt je nach der Position der beiden Ventilteller 5.1, 5.2 nach links und/oder nach rechts. Um die Druckverhältnisse im Zuleitungsrohr 3.1 aufnehmen zu können, ist die Kolbenstange 13 mit einem seitlichen Ansatz 13' versehen, an dessen Kopf die Druckleitung 6.1 für den Gesamtdruck und an dessen Seite die Druckleitung 6.2 für den statischen Druck münden.4 shows two mirror images on the piston rod 13 valve plates 5.1, 5.2 oriented towards one another, of which each opens a pipe 3.3, 3.4 assigned to him or closes. The inflowing through the feed pipe 3.1 Gas flows depending on the position of the two valve plates 5.1, 5.2 to the left and / or to the right. To the To be able to record pressure conditions in the supply pipe 3.1 is the piston rod 13 with a side extension 13 ' provided at the head of the pressure line 6.1 for the Total pressure and on its side the pressure line 6.2 for the static pressure.

Fig.5 zeigt ein zweites Anwendungsbeispiel. An der Kolbenstange 13 ist ein Ventilteller 5.1 zum Öffnen und Verschließen des Gaszuleitungsrohrs 3.1 vorgesehen. Davor sitzt ein Hohlzylinder 5.4. Das Gasrohr 3.1 ist mit einem perforierten Bereich 2.6 versehen, der vom Hohlzylinder 5.4 mehr oder weniger stark verschlossen wird, um so die Akustik des Schalldämpfers zu beeinflussen.Fig. 5 shows a second application example. At the Piston rod 13 is a valve disk 5.1 for opening and Closing the gas supply pipe 3.1 provided. Before there is a hollow cylinder 5.4. The gas pipe 3.1 is with a perforated area 2.6 provided by the hollow cylinder 5.4 more or less closed, so the acoustics of the silencer.

Fig.6 zeigt ein drittes Anwendungsbeispiel. An der Kolbenstange 13 sind zwei Ventilteller 5.1, 5.2 mit unterschiedlichem Durchmesser angebracht. Diese korrespondieren mit zwei konzentrischen Rohren 3.1, 3.4, wobei der zweite Ventilteller 5.2 sich im Inneren des zweiten Rohrs 3.4 bewegen läßt, bis der erste Ventilteller 5.1 das äußere gasführende Rohr 3.1 verschließt.Fig. 6 shows a third application example. At the Piston rod 13 are two valve plates 5.1, 5.2 with different diameters attached. This correspond to two concentric tubes 3.1, 3.4, the second valve plate 5.2 located inside the second tube 3.4 can move until the first valve plate 5.1 closes the outer gas-carrying pipe 3.1.

Es versteht sich, daß die beiden Ventilteller 5.1, 5.2 auch so dimensioniert und positioniert werden können, daß der erste Ventilteller 5.1 im Inneren des ersten Rohres 3.1 verschoben werden kann, während der zweite Ventilteller 5.2 das Ende des zweiten Gasrohrs 3.4 verschließt bzw. freigibt.It goes without saying that the two valve plates 5.1, 5.2 also can be dimensioned and positioned so that the first valve plate 5.1 inside the first tube 3.1 can be moved while the second valve plate 5.2 closes or releases the end of the second gas pipe 3.4.

Claims (10)

  1. A silencer with a variable damping characteristic for pulsating gases, comprising
    a housing (2),
    a gas feed pipe as gas inlet (1) into the housing (2),
    further pipes (3.2,3.3,3.4) integrated into the housing (2),
    an actuating box (10) which actuates a valve closing element (5) via a piston rod (13), with
    a diaphragm (11.1) with an overpressure side and a low-pressure side,
    and a support spring (12.1)
    the total gas pressure acts on the overpressure side of the diaphragm (11.1) via a first pressure line (6.1) and a first pressure connection (15.1),
    a static gas pressure acts on the low-pressure side of the diaphragm (11.1) via a second pressure connection (15.2),
    characterised by the features:
    the actuating box (10) has at least two diaphragms (11.1,11.2.11.3) and a corresponding number of separate chambers (14.1,14.2,14.3) between the diaphragms or between the diaphragms and the housing (10),
    each diaphragm (11.1,11.2,11.3) is braced by a spring (12.1,12.2,12.3),
    each further chamber (14.3,14.4) also has a pressure connection (15.3,15.4),
    a second pressure line (6.2) directs the static gas pressure in the gas feed pipe (3.1) to the second pressure connection (15.2).
  2. A silencer according to Claim 1, characterised by the features:
    both pressure lines (6.1,6.2) are integrated into the piston rod,
    the first pressure line (6.1) discharges into the head of the piston rod (13),
    the second pressure line (6.2) opens between the head of the piston rod (13) and the valve closing element (5) laterally of the piston rod (13),
    the head of the piston rod (13) projects into the gas feed pipe (3.1) .
  3. A silencer according to Claim 1 or 2, characterised by the features:
    a third pressure line (6.3) directs an underpressure into a third chamber (14.3),
    the underpressure originates from the intake duct of an internal-combustion engine.
  4. A silencer according to any one of Claims 1 to 3, characterised by the feature:
    one chamber (14.3) is in communication with the atmosphere.
  5. A silencer according to any one of Claims 1 to 4, characterised by the feature:
    at least one diaphragm has a deviating surface.
  6. A silencer according to any one of Claims 1 to 5, characterised by the feature:
    the valve closing element (5) is in the form of at least one valve disc (5.1,5.2).
  7. A silencer according to Claim 6, characterised by the features:
    at least two valve discs (5.1,5.2) are mounted on the piston rod (13),
    the diameters of the valve discs (5.1,5.2) differ from one another.
  8. A silencer according to Claim 6, characterised by the features:
    at least two valve discs (5.1,5.2) are mounted on the piston rod (13),
    the valve discs (5.1,5.2) are directed towards one another in a mirror image.
  9. A silencer according to any one of Claims 1 to 5, characterised by the feature:
    the valve closing element (5) is in the form of a hollow cylinder (5.4).
  10. A silencer according to any one of Claims 1 to 5, characterised by the feature:
    the valve closing element (5) is in the form of a cylinder with a closed end.
EP96116731A 1995-11-02 1996-10-18 Silencer with variable damping characteristics Expired - Lifetime EP0771939B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540716 1995-11-02
DE19540716A DE19540716C1 (en) 1995-11-02 1995-11-02 Silencer with variable damping characteristics

Publications (2)

Publication Number Publication Date
EP0771939A1 EP0771939A1 (en) 1997-05-07
EP0771939B1 true EP0771939B1 (en) 2000-03-22

Family

ID=7776368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116731A Expired - Lifetime EP0771939B1 (en) 1995-11-02 1996-10-18 Silencer with variable damping characteristics

Country Status (4)

Country Link
US (1) US5821474A (en)
EP (1) EP0771939B1 (en)
JP (1) JPH09166010A (en)
DE (2) DE19540716C1 (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE517825C2 (en) * 1997-11-14 2002-07-23 Volvo Car Corp Device and method of silencing unit and use of the device in a motor vehicle
JP4298835B2 (en) * 1999-01-22 2009-07-22 本田技研工業株式会社 Motorcycle exhaust system
DE19935711C1 (en) * 1999-07-29 2000-12-28 Zeuna Staerker Kg Engine exhaust gas muffler has variable cross-section flow path between different chambers controlled by closure element with associated operating element adjacent exit flow of entry flow channel
SE521329C2 (en) * 1999-09-06 2003-10-21 Volvo Personvagnar Ab Device and method of silencer unit
DE19947938B4 (en) * 1999-10-06 2005-09-22 Zeuna-Stärker GmbH & Co KG Silencer with variable damping characteristics
SE517794C2 (en) 1999-11-05 2002-07-16 Erik Jonsson Silencing device
DE10000463A1 (en) 2000-01-07 2001-07-26 Zeuna Staerker Kg Flow switching element; has Coanda tulip, at least two outlets and displacement body with even flow surface joined to casing, with separating edge defining area between casing and flow surface
DE10000464B4 (en) 2000-01-07 2004-02-05 Zeuna-Stärker GmbH & Co KG Fluidic switching element
DE10020491A1 (en) * 2000-04-26 2002-03-14 Eberspaecher J Gmbh & Co Muffler system of a motor vehicle with variable damping characteristics
US6732510B2 (en) 2002-02-06 2004-05-11 Arvin Technologies, Inc. Exhaust processor with variable tuning system
US8079441B2 (en) * 2002-09-08 2011-12-20 Guobiao Zhang Muffler
CN1408990B (en) * 2002-09-08 2012-04-25 章国标 Silencer
DE10311201A1 (en) * 2003-03-14 2004-09-30 Heinrich Gillet Gmbh Silencer with variable damping characteristics
DE10319212B4 (en) * 2003-04-29 2010-02-11 Heinrich Gillet Gmbh Silencer with variable acoustic properties
US20050155816A1 (en) * 2004-01-16 2005-07-21 Alcini William V. Dynamic exhaust system for advanced internal combustion engines
GB2414274A (en) * 2004-05-18 2005-11-23 Richard Bushell Dynamic exhaust system for vehicular i.c. engines
US7870930B2 (en) * 2005-09-02 2011-01-18 Emcon Technologies Llc Exhaust system with external helmholtz resonator and associated method
US7775322B2 (en) * 2007-03-16 2010-08-17 Tenneco Automotive Operating Company Inc. Snap-action valve for exhaust system
US8468813B2 (en) * 2007-03-16 2013-06-25 Tenneco Automotive Operating Company Inc. Snap-action valve for exhaust system
US7434570B2 (en) * 2007-03-16 2008-10-14 Tenneco Automotive Operating Company Inc. Snap-action valve for exhaust system
TWM321061U (en) * 2007-03-22 2007-10-21 Yi-Fan Peng Exhaust back pressure apparatus for automobile and motorcycle engines
US8033358B2 (en) * 2007-04-26 2011-10-11 Lord Corporation Noise controlled turbine engine with aircraft engine adaptive noise control tubes
DE102007026811A1 (en) * 2007-06-06 2008-12-11 J. Eberspächer GmbH & Co. KG silencer
US20090229913A1 (en) * 2008-02-08 2009-09-17 Waldron's Antique Exhaust Dual Mode Exhaust Muffler
US8191572B2 (en) * 2009-04-16 2012-06-05 Tenneco Automotive Operating Company Inc. Snap action valve with bumper pad
US8381401B2 (en) * 2009-04-16 2013-02-26 Tenneco Automotive Operating Company Inc. Method of installing rotatable flapper valve to an interior of a conduit
US8353153B2 (en) * 2010-02-25 2013-01-15 Tenneco Automotive Operating Company Inc. Snapper valve for hot end systems with burners
US8657065B1 (en) 2012-12-14 2014-02-25 Tenneco Automotive Operating Company Inc. Exhaust valve with resilient spring pad
WO2014154226A1 (en) * 2013-03-27 2014-10-02 Volvo Truck Corporation An exhaust gas pressure regulator
JP5945018B1 (en) * 2015-01-30 2016-07-05 本田技研工業株式会社 Exhaust muffler
EP3156664B1 (en) * 2015-10-13 2020-09-16 Alcatel Lucent An adjustable resonator assembly and a method for reducing acoustic emissions in a gas flow system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072372A (en) * 1934-02-23 1937-03-02 Riethmiller Ruth Exhaust system for automotive engines
US3620330A (en) * 1969-04-14 1971-11-16 Oldberg Mfg Co Muffler construction and method of selectively modifying its sound-attenuating characteristics
FR2514412A1 (en) * 1981-10-14 1983-04-15 Peugeot Cycles DEVICE FOR MODULATING THE FLOW OF GASES IN AN EXHAUST MUFFLER OF AN INTERNAL COMBUSTION ENGINE
JPS62237175A (en) * 1986-04-07 1987-10-17 Babcock Hitachi Kk Ball valve
US5003781A (en) * 1988-05-23 1991-04-02 Mazda Motor Corporation Air supply and exhaust control systems for turbocharged internal combustion engines
DE9405771U1 (en) * 1994-04-07 1994-08-25 Heinrich Gillet Gmbh & Co Kg, 67480 Edenkoben Silencer with switchable damping characteristics
US5614699A (en) * 1994-05-09 1997-03-25 Nissan Motor Co., Ltd. Automobile exhaust noise suppressor

Also Published As

Publication number Publication date
DE59604751D1 (en) 2000-04-27
DE19540716C1 (en) 1997-04-17
JPH09166010A (en) 1997-06-24
US5821474A (en) 1998-10-13
EP0771939A1 (en) 1997-05-07

Similar Documents

Publication Publication Date Title
EP0771939B1 (en) Silencer with variable damping characteristics
EP1278945B1 (en) Automotive exhaust silencer system with variable damping characteristics
DE2926373C2 (en) Exhaust gas bypass valve arrangement for the exhaust gas turbocharger of an internal combustion engine
DE3835079A1 (en) EXHAUST OR EXHAUST SILENCER
DE102009000035A1 (en) Structure for introducing gas into an intake air
DE2539185B2 (en) DOSING CONTROL FOR THE EXHAUST GAS RECIRCULATION FLOW OF A COMBUSTION ENGINE
DE2304435C2 (en) Internal combustion engine
DE102013111955A1 (en) Controllable oil separator
DE19503322C2 (en) Silencer with variable damping characteristics
DE3037489C2 (en) Charging device for internal combustion engines
DE3743056A1 (en) Intake string for a reciprocating internal-combustion engine
WO1997008434A1 (en) Inlet system for a piston internal combustion engine
EP1762709B1 (en) Muffler
DE19848217A1 (en) Gas compressor has additional compression chambers and throttle pipes to bypass closure valves when idling, to lower self-stabilizing idling pressure
DE2434518A1 (en) EXHAUST GAS RECIRCULATION DEVICE FOR COMBUSTION ENGINES
DE4330566A1 (en) Air intake system of an internal combustion engine
DE19619173C1 (en) Pulsating-gas silencer with variable damping characteristics
DE9405771U1 (en) Silencer with switchable damping characteristics
DE2451148C3 (en) Exhaust gas recirculation device in internal combustion engines
DE10222507A1 (en) Device for noise shaping in a motor vehicle
DE19816266A1 (en) Air intake duct system for an internal combustion engine
DE3338596A1 (en) EXHAUST BRAKE VALVE
DE10321323B3 (en) Intake system for an internal combustion engine with at least two rows of cylinder banks
DE125837C (en)
DE4317563A1 (en) Engine intake changeover valve with rotary pipe bend - has bend outlet axis coinciding with its axis of rotation, having three or more intake pipes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19970723

17Q First examination report despatched

Effective date: 19980827

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20000322

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000322

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000322

REF Corresponds to:

Ref document number: 59604751

Country of ref document: DE

Date of ref document: 20000427

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20000322

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011113

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030501

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230528