EP2834489A1 - Endschalldämpfer - Google Patents
EndschalldämpferInfo
- Publication number
- EP2834489A1 EP2834489A1 EP13714554.6A EP13714554A EP2834489A1 EP 2834489 A1 EP2834489 A1 EP 2834489A1 EP 13714554 A EP13714554 A EP 13714554A EP 2834489 A1 EP2834489 A1 EP 2834489A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- muffler
- motor vehicle
- silencer
- central part
- side parts
- 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- Withdrawn
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
- F01N1/00—Silencing apparatus characterised by method of silencing
-
- 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
- F01N13/001—Exhaust gas flow channels or chambers being at least partly formed in the structural parts of the engine or machine
-
- 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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
- F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
Definitions
- the invention relates to a silencer for an exhaust system of a motor vehicle driven by an internal combustion engine according to the preamble of claim 1, and to a motor vehicle having an internal combustion engine and an exhaust system according to the preamble of claim 7.
- the known muffler consists of two parts, each of which is arranged in one of two cells on the underside of the front part of the vehicle and form with their undersides a part of a subfloor of the motor vehicle.
- the muffler extends over the entire width of the front part of the motor vehicle, wherein the two parts are provided on its underside extending in the direction of travel of the motor vehicle cooling fins to provide for rapid cooling of the exhaust gases.
- the exiting from the muffler exhaust gases are guided through an exhaust pipe under the motor vehicle through back towards the rear.
- the present invention seeks to provide a suitable for rear mounting muffler of the type mentioned with a large damper volume, which allows optimization of the air flow behind the motor vehicle. Further, the invention has for its object to provide a motor vehicle of the type mentioned above with a rear-mounted muffler, which allows optimization of the air flow behind the motor vehicle.
- the muffler is a specific for installation at the rear of the motor vehicle rear muffler and has an aerodynamically effective bottom.
- the motor vehicle according to the invention is characterized in that the muffler is arranged at the rear of the motor vehicle rear muffler with an aerodynamically effective bottom.
- the air flow behind the vehicle can be optimized, preferably by the aerodynamically effective bottom of the muffler has a downwardly open and extended backward flow channel Formed or limited, which causes in the manner of a diffuser, a delay of the air flow and thus a reduction in the air velocity, so that it comes in the channel to a static pressure increase.
- the channel is delimited upward in the longitudinal section through an inclined surface sloping upward in the flow direction of the air or towards the rear of the motor vehicle.
- the surface may advantageously have the profile of an aircraft wing.
- an air guide is mounted in the direction of travel or flow immediately before the muffler, which in this area of the motor vehicle whose underside forms, which not only prevents a deflection of the air flow upwards but also ensures an aerodynamically favorable transition between the aerodynamically effective underside of the muffler and the upstream in the direction of travel or flow area of the motor vehicle.
- a further preferred embodiment of the invention provides that the rear silencer optically simulates a lower part of a bumper cover of a rear bumper of the motor vehicle. This can give the rear of the vehicle an interesting and dynamic appearance, which still wins when the muffler is formed according to a further advantageous embodiment of the invention without tailpipes and instead is provided only at its rear below the bumper cover with one or more advantageous exhaust outlets, which are expediently recessed in the rear boundary wall of the muffler.
- a further preferred embodiment of the invention provides that the muffler is composed of an upper shell and a lower shell, of which the latter forms the aerodynamically effective underside of the rear muffler.
- This design makes it possible to give the lower shell and the upper shell when molding in separate molds independently of each other the optimal shape and then the upper shell and the lower shell then put together so that they surround a flow-through exhaust gas cavity with sound-absorbing effect.
- the upper shell may be smaller than the lower shell and cover only a portion of the lower shell.
- the aerodynamically effective lower shell can be made relatively large to improve their aerodynamic efficiency, while the smaller size of the upper shell outside the muffler and above the lower shell space for the accommodation of a trailer hitch or a spare wheel well, of which the former expedient in Driving direction behind a central portion of the muffler and the latter can be conveniently arranged in the direction of travel in front of the central part of the muffler.
- the installation of the muffler from a lower shell and an upper shell mounted on the lower shell allows at the same time that the rear muffler despite a relatively flat design surrounds a relatively large internal volume, whereby the acoustic effect of the muffler can be improved. Thereby, the volume of a arranged in the flow direction of the exhaust gases in front of the muffler center silencer can be significantly reduced.
- the upper shell and the lower shell together define two higher side parts and connecting the side parts flatter middle part of the muffler whose distance from the bottom is slightly larger than that of the two side parts.
- a rising towards the rear underside of the central part or the muffler under the middle part of the downwardly open and extended backwards acting as a diffuser flow channel is formed, which is bounded on both sides by the further downwardly projecting side parts.
- the muffler from two or more rolled components and preferably from three rolled components, of which the middle has a smaller cross-section and forms a shallower middle part of the muffler as in the shell construction, the aerodynamically effective underside of the top of the forms open at the bottom and at the rear expanded diffuser cornice.
- FIG. 1 is a perspective view of a muffler according to the invention
- FIG. 2 is a top view of the muffler of FIG. 1
- Fig. 3 is a bottom view of the muffler of Figure 1 after installation in a shell body of a car.
- Fig. 4 is a perspective view corresponding to Figure 1, but together with parts of the body and a trailer hitch.
- FIG. 5 is a top view of the muffler, body panels and trailer hitch of FIG. 4; FIG.
- FIG. 6 is a bottom view of the muffler and the trailer hitch of Figure 4 after installation in a body shell.
- Figure 7 is a perspective view of another muffler according to the invention together with parts of a bumper and a transmission of a car.
- Fig. 8 is a longitudinal sectional view of the components of Fig. 7;
- FIG. 9 shows a perspective view corresponding to FIG. 7, but with an additional air-guiding element
- Fig. 10 is a longitudinal sectional view of the components of Fig. 9;
- Fig. 11 is a perspective view corresponding to Figure 9, but of a slightly modified rear muffler.
- FIG. 12 is a longitudinal sectional view of the components of FIG. 11.
- FIG. 12 is a longitudinal sectional view of the components of FIG. 11.
- the mufflers 1 shown in the drawing are part of an exhaust system 2 of an internal combustion engine (not shown) of a passenger vehicle, which is partially shown together with the shell body 3 of the passenger vehicle in Figures 3 and 6.
- the shell-type mufflers 1 are composed of a flat one-piece lower shell 4 and a flat one-piece upper shell 5 joined together along a peripheral seam 6 are connected.
- the lower shell 4 and the upper shell 5 are each formed from sheet metal and enclose after assembly together several, insulated from the outside and through the exhaust gas chambers (not shown). In these chambers, the exhaust gas is divided into several different lengths of partial streams, which comes through reflection, absorption and interference effects due to phase-shifted superposition to a partial extinction of the sound waves and thus to a high attenuation at a low back pressure.
- the upper shell 5 is smaller than the lower shell 4, so that it covers only part of the lower shell 4, while another part 7 of the lower shell 4 remains uncovered.
- the lower shell 4 has a generally U-shaped outline with a yoke 8 and two leg portions 9, while the upper shell has a generally H-shaped outline with two generally parallel longitudinal beams 10 and a cross bar 11 perpendicular thereto.
- the longitudinal beams 10 of the H-shaped upper shell 5 are congruent with the leg portions 9 of the U-shaped lower shell 4 and form two " side parts 12 of the rear muffler 1.
- the crossbar 1 1 of the H-shaped upper shell 5 and the yoke 8 of the U-shaped lower shell 4 together form a central part 13 of the muffler 1, wherein the crossbar 1 1 of the H-shaped upper shell 5 is narrower than the yoke 8 of the U-shaped lower shell 4, so that the latter between the two side parts 12 of the muffler 1 on the direction of travel opposite side of the crossbar 11 of the H-shaped upper shell 5 projects and there forms the uncovered part 7 of the lower shell 4.
- the upper shell 5 is provided for stiffening with embossed beads 14, which extend in a right angle aligned droves on the upper shell 5.
- the lower shell 4 may be provided in the region of the side parts 12 with flat trough-shaped indentations 15, which extend for aerodynamic reasons parallel to the direction of travel of the passenger car.
- the end damper 1 shown in FIGS. 11 and 12 has a smooth lower shell 4 or underside.
- a front pointing in the direction of travel F of the passenger car part of the muffler 1 is generally flat, while the rear part of the muffler 1 is slightly curved upwards.
- the muffler 1 has an exhaust gas inlet opening 16, which is arranged in one of the side parts 12 and is generally located in driving direction. direction points. As best shown in Fig. 3 and 6, the exhaust gas inlet opening 16 is connected to an exhaust pipe 17, in the distance in front of the muffler 1 is still a center muffler 18 is installed.
- the muffler 1 has a plurality of generally horizontal slot-shaped exhaust gas outlet openings 19, which are arranged on the opposite direction of travel to the rear 20 of the muffler 1.
- a shorter exhaust gas outlet opening 9 is provided in the region of the two side parts 12 and a longer exhaust gas outlet opening 19 in the region of the middle part 13, however, the number and shape of the exhaust gas outlet openings 19 can vary depending on the vehicle model.
- the exhaust gas outlet openings 19 are recessed along the peripheral seam 6 between the upper shell 5 and the lower shell 4 from the upper shell 5 and the lower shell 4, so that they are bounded by the rear side 20 of the rear muffler 1.
- this has no tailpipes, which makes it particularly appealing from an aesthetic point of view.
- the muffler 1 is attached to the rear 22 of the passenger car, where it forms behind the wheels of the rear axle 23, the rearmost part of the underbody.
- the width of the muffler 1 substantially corresponds to the distance of the wheels of the rear axle 23, so that it extends over almost the entire width of the rear 22.
- the muffler 1 is mounted in an inclined orientation under the passenger car, so that its rear part at the rear 22 of the passenger car has a greater ground clearance than a front part.
- the lower shell 4 of the muffler 1 in the region of the shallower middle part 13 with respect to the side parts 12 is slightly offset upwards, so that the middle part 13 of the muffler 1 a slightly larger Ground clearance than the two side parts 12 has.
- the lower shell 4 of the muffler 1 in the region of the flatter middle part 13 along a vertical longitudinal center plane of the passenger car has an aerodynamically effective profile, for example, a profile that can be similar to that of an aircraft wing.
- the underside of the muffler 1 has an aerodynamically effective form, because due to the two first mentioned Characteristics between the two side parts 12 of the rear muffler 1 and below the middle part 13 a downwardly open and towards the rear expanding flow or diffusor channel 24 is formed.
- this flow or diffuser channel 24 the air flowing to the rear 22 is slowed down due to the cross-sectional enlargement. This results in the flow or diffuser channel 24 to a static pressure increase, which advantageously affects the outflow of air at the rear 22. Due to the aerodynamically effective profile of the lower shell 4 of the middle part 13, as stated above, this effect can be enhanced.
- an air guide in the form of a removable aperture 25, as shown in Figures 9 to 12.
- the lower edge of the bumper fascia 26 follows the shape of the muffler 1, wherein in this area two drawn down side panels 28 of the bumper cover 26 cover the two side panels 12 of the muffler 1 and persons in front of a Protect direct contact with the muffler 1.
Landscapes
- 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)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012006818.2A DE102012006818B4 (de) | 2012-04-04 | 2012-04-04 | Endschalldämpfer |
| PCT/EP2013/000985 WO2013149725A1 (de) | 2012-04-04 | 2013-04-03 | Endschalldämpfer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2834489A1 true EP2834489A1 (de) | 2015-02-11 |
Family
ID=48049939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13714554.6A Withdrawn EP2834489A1 (de) | 2012-04-04 | 2013-04-03 | Endschalldämpfer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2834489A1 (de) |
| DE (1) | DE102012006818B4 (de) |
| WO (1) | WO2013149725A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11447192B2 (en) | 2021-01-12 | 2022-09-20 | Honda Motor Co., Ltd. | Diffuser for a vehicle |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015112951A (ja) | 2013-12-10 | 2015-06-22 | スズキ株式会社 | 車両後部の下端構造 |
| DE102016122287B4 (de) | 2016-11-21 | 2023-07-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamisch wirkender Endschalldämpfer für ein Kraftfahrzeug |
| DE202016009174U1 (de) | 2016-11-21 | 2023-06-23 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamisch wirkender Endschalldämpfer für ein Kraftfahrzeug |
| DE202016009175U1 (de) | 2016-11-21 | 2023-06-23 | Dr. Ing. h.c. F. Porsche Aktiengesellschaft | Aerodynamisch wirkender Endschalldämpfer für ein Kraftfahrzeug |
| US10393003B2 (en) * | 2017-02-09 | 2019-08-27 | Ford Global Technologies, Llc | Stamped aerodynamic deflector for vehicle muffler |
| DE102019107722B4 (de) * | 2019-03-26 | 2025-07-03 | Bayerische Motoren Werke Aktiengesellschaft | Zierblende für einen Schalldämpfer |
| DE102025121356B3 (de) | 2025-06-02 | 2026-05-07 | Audi Aktiengesellschaft | Seitenschwelleranordnung sowie Kraftfahrzeug umfassend eine solche Seitenschwelleranordnung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2484826A (en) * | 1945-02-02 | 1949-10-18 | Bertron G Harley | Silencer with flattened corrugated gas passage |
| US2658580A (en) * | 1948-10-18 | 1953-11-10 | Rech S Tech Et D Expl S Ind So | Silencer for internal-combustion engines |
| US3952823A (en) * | 1972-07-10 | 1976-04-27 | Hinderks M V | Vehicle gas extractor |
| US4760894A (en) * | 1987-06-11 | 1988-08-02 | Ap Industries, Inc. | Exhaust muffler with angularly aligned inlets and outlets |
| AU3159099A (en) * | 1998-04-06 | 1999-10-25 | Ford Global Technologies, Inc. | Motor vehicle exhaust system |
| GB2344853A (en) * | 1998-12-18 | 2000-06-21 | Ford Global Tech Inc | Motor vehicle exhaust system |
| GB9925337D0 (en) * | 1999-10-26 | 1999-12-29 | Lyons Timothy S | Vehicle exhaust asemblies |
| US6668972B2 (en) * | 2000-11-07 | 2003-12-30 | Owens Corning Fiberglas Technology, Inc. | Bumper/muffler assembly |
| FR2897830B1 (fr) * | 2006-02-27 | 2008-04-11 | Renault Sas | Structure arriere d'un vehicule automobile |
| US20090145687A1 (en) * | 2007-12-07 | 2009-06-11 | Treat Troy R | Motorcycle exhaust muffler |
-
2012
- 2012-04-04 DE DE102012006818.2A patent/DE102012006818B4/de not_active Expired - Fee Related
-
2013
- 2013-04-03 EP EP13714554.6A patent/EP2834489A1/de not_active Withdrawn
- 2013-04-03 WO PCT/EP2013/000985 patent/WO2013149725A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2013149725A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11447192B2 (en) | 2021-01-12 | 2022-09-20 | Honda Motor Co., Ltd. | Diffuser for a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012006818B4 (de) | 2015-05-21 |
| WO2013149725A1 (de) | 2013-10-10 |
| DE102012006818A1 (de) | 2013-10-10 |
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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 |
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| 17P | Request for examination filed |
Effective date: 20141104 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: FIETZEK, GEORG Inventor name: WILDING, WERNER Inventor name: PIERINGER, JUTTA Inventor name: SCHWARTZE, SEBASTIAN |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20170102 |
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| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| INTG | Intention to grant announced |
Effective date: 20170721 |
|
| 18W | Application withdrawn |
Effective date: 20170807 |