DE3505699C1 - Exhaust pipe with an inserted corrugated spring tube for motor vehicles - Google Patents
Exhaust pipe with an inserted corrugated spring tube for motor vehiclesInfo
- Publication number
- DE3505699C1 DE3505699C1 DE19853505699 DE3505699A DE3505699C1 DE 3505699 C1 DE3505699 C1 DE 3505699C1 DE 19853505699 DE19853505699 DE 19853505699 DE 3505699 A DE3505699 A DE 3505699A DE 3505699 C1 DE3505699 C1 DE 3505699C1
- Authority
- DE
- Germany
- Prior art keywords
- spring
- tube
- exhaust
- exhaust line
- corrugated
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
- F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
- F16L27/107—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve
- F16L27/11—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
- F16L27/111—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations the bellows being reinforced
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Die in die Schraubenrillen eingewickelte Strangfeder bewirkt eine Stabilisierung des mit sehr dünner Wandstärke ausgebildeten Wellfederrohres. Während bei einem Wellfederrohr der vorbekannten Art die Blechstärke mindestens 0,5 mm betragen muß, damit eine ausreichende Rohrstabilität gewährleistet ist, beträgt die Blechstärke bei einem erfindungsgemäßen Wellfederrohr vorzugsweise 0,2 bis 0,5mm. Gleichwohl wird durch den allseitigen, radial nach innen gerichteten Druck der fest und passend in den Schraubenrillen liegenden Strangfeder eine erhebliche Stabilität des an sich sehr weich ausgebildeten Wellfederrohres gewährleistet. Wichtig ist, daß das Wellfederrohr ebenso wie die gewickelte Strangfeder überall einen kreisförmigen Querschnitt senkrecht zur Wellfederrohrachse aufweisen. The strand spring wrapped in the helical grooves causes stabilization of the corrugated spring tube, which has a very thin wall thickness. While in a corrugated spring tube of the known type, the sheet thickness is at least Must be 0.5 mm so that sufficient pipe stability is guaranteed the sheet metal thickness in a corrugated spring tube according to the invention is preferably 0.2 to 0.5 mm. Nonetheless, the pressure on all sides, directed radially inwards, makes it firm and a strand spring that fits in the helical grooves provides considerable stability of the very soft corrugated spring tube guaranteed. Important is, that the corrugated spring tube, like the coiled strand spring, has a circular shape everywhere Have cross-section perpendicular to the corrugated spring tube axis.
Durch die sehr weiche Ausbildung des Wellfederrohres wird auch eine erhebliche Geräuschdämpfung herbeigeführt, wobei wegen der aufgebrachten Strangfeder das Wellfederrohr mechanisch aber nicht so stark geschwächt ist, daß Verformungen und Wechselbeanspruchen während des Betriebs schließlich zum Bruch des relativ dünn ausgebildeten Materials führen könnten. The very soft design of the corrugated spring tube is also a brought about considerable noise attenuation, because of the applied string spring the corrugated spring tube is mechanically but not weakened so much that deformations and alternating stresses during operation eventually lead to breakage of the relatively thin trained material.
Erfindungsgemäß wird durch den relativ hohen Isolationsgrad eine Körperschallübertragung, die vom Motor her kommt, verhindert. Das Wellfederrohr kann aufgrund seiner sehr weichen Ausbildung auch als Wellfederschlauch bezeichnet werden, der allerdings durch die fest darauf aufgewickelte Strangfeder erheblich stabilisiert ist. Das Wellfederrohr soll möglichst im vorderen Bereich der Auspuffleitung nahe dem Motor sitzen. According to the invention is due to the relatively high degree of insulation Structure-borne noise that comes from the engine is prevented. The corrugated spring tube can also be referred to as a corrugated spring hose due to its very soft design which, however, is considerable due to the strand spring that is firmly wound on it is stabilized. If possible, the corrugated spring tube should be in the front area of the exhaust line sit near the engine.
Aufgrund der erfindungsgemäßen Ausbildung werden auch Verspannungen der Auspuffleitung ausgeglichen. Schwingungsamplituden im Resonanzfall werden stark reduziert. Die Federrate der Strangfeder in ihrer Längsrichtung soll vorzugsweise 0,1 bis 1 kp/cm betragen. Due to the training according to the invention, there are also tension the exhaust line balanced. Oscillation amplitudes in the case of resonance become strong reduced. The spring rate of the strand spring in its longitudinal direction should preferably 0.1 to 1 kgf / cm.
Vorteilhafte Weiterbildungen der Erfindung sind durch die Unteransprüche gekennzeichnet. Advantageous further developments of the invention are given by the subclaims marked.
Die Vorspannung der Strangfeder in Längsrichtung gemäß den Ansprüchen 5 und 6 sorgt für eine gute Verteilung der Kräfte. The bias of the strand spring in the longitudinal direction according to the claims 5 and 6 ensure a good distribution of forces.
Durch die Maßnahmen des Anspruches 9 liegt die Strangfeder passend in den Schraubenrillen und stabilisiert das Wellfederrohr damit in besonders günstiger Weise. Due to the measures of claim 9, the strand spring is suitable in the screw grooves and stabilizes the corrugated spring tube in a particularly favorable way Way.
Die Merkmale des Anspruchs 10 bewirken, daß die Strangfeder deutlich versenkt innerhalb der Rohrwellen untergebracht ist, was auch der Gefahr von Beschädigungen der Strangfeder z. B. durch Steinschlag oder dergleichen entgegenwirkt. The features of claim 10 cause the strand spring to be clear sunk inside the tubular shafts, which also increases the risk of damage the strand spring z. B. counteracts by falling rocks or the like.
Eine gemäß den Ansprüchen 11 und 12 als Schraubenfeder ausgebildete Strangfeder weist von Haus aus einen optimalen Querschnitt für die Zwecke der Erfindung auf und ist auch bei Erhitzung noch ausreichend elastisch. One designed according to claims 11 and 12 as a helical spring The strand spring inherently has an optimal cross-section for the purposes of the invention and is still sufficiently elastic even when heated.
Um die Bruchgefahr insbesondere im Bereich des Überganges von den glatten Rohrteilen zum Wellfederrohr herabzusetzen, sind die Maßnahmen nach Anspruch 13 vorteilhaft. To reduce the risk of breakage, especially in the area of the transition from the To reduce smooth tube parts to corrugated spring tube, the measures according to claim 13 advantageous.
Die Erfindung wird im folgenden beispielsweise anhand der Zeichnung beschrieben; in dieser zeigt F i g. 1 eine teilweise geschnittene schematische Seitenansicht einer erfindungsgemäßen Auspuffleitung und F i g. 2 eine vergrößerte, teilweise aufgebrochene Seitenansicht der Auspuffleitung nach Fig. 1 im Bereich des Wellfederrohres. The invention is illustrated below, for example, with reference to the drawing described; in this FIG. 1 is a partially sectioned schematic side view an exhaust pipe according to the invention and FIG. 2 is an enlarged, partially Broken side view of the exhaust line according to FIG. 1 in the area of the corrugated spring tube.
Nach der Zeichnung schließt sich an den Auspuff-Motorflansch 19 zunächst ein zweifach gekrümmter glatter zylindrischer Rohrteil 16 einer Kraftfahrzeug-Auspuffleitung an, der in einem möglichst geringen Abstand zum Motorflansch 19 mit dem vorderen Anschlußstutzen 24 eines Wellfederrohrs 14 geringerer Wandstärke verbunden ist. Die Länge des Wellfederrohres beträgt ca. 20 cm. Am hinteren Ende ist das Wellfederrohr 14 über einen hinteren Anschlußstutzen 25 mit einem glatten Rohrteil 26 der Auspuffleitung verbunden, das über den Auspuff-Schalldämpfertopf 20 schließlich zur Auspuffmündung 21 am Ende des Fahrzeuges führt. According to the drawing, the exhaust engine flange 19 is initially connected a doubly curved smooth one cylindrical pipe part 16 of a motor vehicle exhaust pipe on, which is as close as possible to the motor flange 19 with the front Connection piece 24 of a corrugated spring tube 14 of smaller wall thickness is connected. The length of the corrugated spring tube is approx. 20 cm. At the rear end is the corrugated spring tube 14 via a rear connection piece 25 with a smooth pipe part 26 of the exhaust line connected, which via the exhaust silencer pot 20 finally to the exhaust port 21 leads at the end of the vehicle.
Während sich zwischen dem Motorflansch 19 und dem Wellfederrohr 14 keine Verbindungselemente zwischen dem glatten Rohrteil 16 und der Fahrzeugkarosserie bzw. dem Fahrzeugrahmen befinden, ist das sich an das Wellfederrohr 14 anschließende glatte Rohrteil 26 mittels über die Länge verteilter Gummibefestigungselemente 22 am Fahrzeugrahmen von unten aufgehängt. While between the motor flange 19 and the corrugated spring tube 14 no connecting elements between the smooth tubular part 16 and the vehicle body or the vehicle frame are located, is the one adjoining the corrugated spring tube 14 smooth pipe part 26 by means of rubber fastening elements 22 distributed over the length suspended from below on the vehicle frame.
Nach den Fig. 1 und 2 sind die Rohrwellen 11 des Wellfederrohres 14 schraubenförmig um die Achse 23 der Auspuffleitung herumgewickelt, wobei die hierbei entstehenden Schraubenrippen 18 radial nach außen über die durch die glatten zylindrischen Anschlußstutzen 24, 25 bestimmte Umfangsfläche vorstehen, während die Rohrrillen 12, also die Minima der Rohrwellen 11 in Richtung der Achse 23 etwa mit den glatten Anschlußstutzen 24,25 ausgerichtet sind. According to FIGS. 1 and 2, the tubular shafts 11 of the corrugated spring tube 14 helically wound around the axis 23 of the exhaust pipe, the the resulting screw ribs 18 radially outward over the smooth cylindrical connecting pieces 24, 25 protrude certain circumferential surface while the pipe grooves 12, that is to say the minima of the pipe shafts 11 in the direction of the axis 23, for example are aligned with the smooth connecting pieces 24,25.
Der Verlauf der durch die Rohrrippen 18 und die Rohrrillen 12 gebildeten Rohrwellen 11 ist annähernd sinusförmig. The course of the pipe ribs 18 and the pipe grooves 12 formed Tubular waves 11 is approximately sinusoidal.
In die Schraubenrillen 12 ist eine als Schraubenfeder ausgebildete Strangfeder 13 hineingewickelt, deren Enden 15 mit Laschen 17 fest verbunden sind, die im unmittelbaren Anschluß an die letzte Schraubenrippe 18 mit den glatten Anschlußstutzen 24, 25 in geeigneter Weise verbunden sind. In the helical grooves 12 is designed as a helical spring Strand spring 13 is wound in, the ends 15 of which are firmly connected to tabs 17, in the immediate connection to the last screw rib 18 with the smooth connecting pieces 24, 25 are connected in a suitable manner.
Die Strangfeder 13 steht entlang ihrer Längsrichtung unter einer Zugvorspannung, so daß die einzelnen Windungen der Schraubenfeder 13 in Richtung der Pfeile f in F i g. 2 radial nach innen gerichtete Stabilisierungskräfte auf die Schraubenrillen 12 der Rohrwellen 11 ausüben. Hierdurch wird ein erheblicher mechanischer Stabilisierungseffekt erzielt, ohne daß die federnden Eigenschaften des relativ dünn ausgebildeten Materials des Wellfederrohrs 14 beeinträchtigt werden. The strand spring 13 is along its longitudinal direction under a Tensile bias, so that the individual turns of the coil spring 13 in the direction the arrows f in FIG. 2 stabilizing forces directed radially inwards the screw grooves 12 of the tubular shafts 11 exercise. This becomes a significant one mechanical stabilization effect achieved without affecting the resilient properties the relatively thin material of the corrugated spring tube 14 are impaired.
- Leerseite -- blank page -
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505699 DE3505699C1 (en) | 1985-02-19 | 1985-02-19 | Exhaust pipe with an inserted corrugated spring tube for motor vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505699 DE3505699C1 (en) | 1985-02-19 | 1985-02-19 | Exhaust pipe with an inserted corrugated spring tube for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3505699C1 true DE3505699C1 (en) | 1986-08-14 |
Family
ID=6262932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853505699 Expired DE3505699C1 (en) | 1985-02-19 | 1985-02-19 | Exhaust pipe with an inserted corrugated spring tube for motor vehicles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3505699C1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0432436A2 (en) * | 1989-11-09 | 1991-06-19 | Witzenmann GmbH Metallschlauch-Fabrik Pforzheim | Flexible pipe component for exhaust conduits of internal combustion engines used on vehicles |
EP1270889A2 (en) * | 2001-06-28 | 2003-01-02 | J. Eberspächer GmbH & Co. KG | Exhaust mounting element for a motor vehicle |
ITTO20110227A1 (en) * | 2011-03-11 | 2012-09-12 | Magneti Marelli Spa | EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
WO2015152791A1 (en) * | 2014-03-31 | 2015-10-08 | Trelleborg Industri Ab | Device for directing exhaust gases in an articulated vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2256718A1 (en) * | 1972-11-18 | 1974-05-22 | Volkswagenwerk Ag | EXHAUST PIPE FOR A COMBUSTION ENGINE DRIVING A VEHICLE |
DE2327926A1 (en) * | 1973-06-01 | 1974-12-19 | Bremshey Ag | DOUBLE WALL PIPE |
DE2508984A1 (en) * | 1975-03-01 | 1976-09-16 | Pforzheim Metallschlauch | IC engine exhaust pipe - without silencing chambers, has flexible mountings and rock wool filling between co-axial tubes |
DE2655091A1 (en) * | 1976-12-04 | 1978-06-08 | Pforzheim Metallschlauch | Flexible exhaust pipe for vehicle IC engine - uses corrugated pipe with corrugations at one or both ends widened and made shallower or both |
-
1985
- 1985-02-19 DE DE19853505699 patent/DE3505699C1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2256718A1 (en) * | 1972-11-18 | 1974-05-22 | Volkswagenwerk Ag | EXHAUST PIPE FOR A COMBUSTION ENGINE DRIVING A VEHICLE |
DE2327926A1 (en) * | 1973-06-01 | 1974-12-19 | Bremshey Ag | DOUBLE WALL PIPE |
DE2508984A1 (en) * | 1975-03-01 | 1976-09-16 | Pforzheim Metallschlauch | IC engine exhaust pipe - without silencing chambers, has flexible mountings and rock wool filling between co-axial tubes |
DE2655091A1 (en) * | 1976-12-04 | 1978-06-08 | Pforzheim Metallschlauch | Flexible exhaust pipe for vehicle IC engine - uses corrugated pipe with corrugations at one or both ends widened and made shallower or both |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0432436A2 (en) * | 1989-11-09 | 1991-06-19 | Witzenmann GmbH Metallschlauch-Fabrik Pforzheim | Flexible pipe component for exhaust conduits of internal combustion engines used on vehicles |
EP0432436A3 (en) * | 1989-11-09 | 1991-09-25 | Witzenmann Gmbh Metallschlauch-Fabrik Pforzheim | Flexible pipe component for exhaust conduits of internal combustion engines used on vehicles |
EP1270889A2 (en) * | 2001-06-28 | 2003-01-02 | J. Eberspächer GmbH & Co. KG | Exhaust mounting element for a motor vehicle |
ITTO20110227A1 (en) * | 2011-03-11 | 2012-09-12 | Magneti Marelli Spa | EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
WO2015152791A1 (en) * | 2014-03-31 | 2015-10-08 | Trelleborg Industri Ab | Device for directing exhaust gases in an articulated vehicle |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |