EP0791734B1 - Abgasklappenanordnung für eine Abgasleitung einer Brennkraftmaschine - Google Patents
Abgasklappenanordnung für eine Abgasleitung einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0791734B1 EP0791734B1 EP97102833A EP97102833A EP0791734B1 EP 0791734 B1 EP0791734 B1 EP 0791734B1 EP 97102833 A EP97102833 A EP 97102833A EP 97102833 A EP97102833 A EP 97102833A EP 0791734 B1 EP0791734 B1 EP 0791734B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diffuser
- exhaust
- longitudinal axis
- exhaust valve
- valve arrangement
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
Definitions
- the invention relates to an exhaust valve arrangement for an exhaust pipe Internal combustion engine with the features of the preamble of claim 1.
- Exhaust flaps are used for tightly closing off in exhaust pipes for example, to control exhaust gas turbochargers that can be switched off. Exhaust flaps for installation in Exhaust pipes are known from DE 42 29 299 C1.
- Exhaust gas exit velocity is relatively high. To reduce to about 1/3 of this The exit velocity of the exhaust gases is known to the turbine as a diffuser to connect.
- Conventional elliptical exhaust flaps for tight closing Barriers cannot be installed in diffusers, but only in cylindrical ones Sections to be connected downstream of the diffuser. This results in a long space between the exhaust of the turbine of the exhaust gas turbocharger and one Compensator, via which the diffuser with the cylindrical section is usually connected to a Exhaust pipe connects.
- the long space of the diffuser with the cylindrical Section leads to high weight with long lever arms, which in turn results in high Bending moments on a connecting flange of the diffuser to the outlet of the turbine of the Exhaust gas turbocharger result.
- the large mass of the arrangement of the diffuser and cylindrical section and the large distance of the center of gravity of this mass from that Flange leads to low natural frequencies, which causes the occurrence of resonances favor.
- the long installation space cannot be accommodated in tight spaces become. There are high manufacturing costs when casting the diffuser and the cylindrical section.
- the object of the invention is to provide an exhaust valve arrangement for an exhaust pipe To create an internal combustion engine that has the disadvantages of the stand with reduced installation space who avoids technology.
- an exhaust valve arrangement for an exhaust pipe is a Internal combustion engine with a turbine of an exhaust gas turbocharger, an outlet of the turbine and a diffuser, which on the one hand to the outlet of the turbine and on the other connects the exhaust pipe.
- the diffuser is concentric with a longitudinal axis and one Exhaust flap is pivotally arranged on a shaft perpendicular to this longitudinal axis.
- Wall segments are provided on an inner wall of the diffuser, which are band-shaped extend along the circumference of the exhaust flap and substantially parallel to Longitudinal axis of the diffuser are aligned. The wall segments form on one Circular cylinder contact surfaces for the elliptical exhaust flap.
- the longitudinal axis of the Circular cylinder runs parallel to the longitudinal axis of the diffuser with an offset.
- the Diameter of the circular cylinder corresponds to the diameter of the circular area by projecting the exhaust flap in the direction of the longitudinal axis.
- the offset or the Eccentricity should be chosen so that the longitudinal axis of the circular cylinder is approximately through the Geometric center of the exhaust flap arranged in the diffuser, so that the band-shaped wall segments lie approximately in the contour of the diffuser.
- a conventionally shaped exhaust flap inside of the conical part of the diffuser for tight closing in exhaust pipes can be used. This leads directly to a reduction in the overall length as a cylindrical section adjoining a diffuser, as in the prior art provided, is not required.
- the eccentricity e is one according to the invention Function of the opening angle of the diffuser and / or the inclination angle of the Exhaust flap and gets bigger if either the opening angle of the diffuser and / or the inclination angle of the exhaust flap becomes larger.
- the wall segments have a constant width.
- the wall segments connected to each other with a circular milling, a milling tool, while following the contour of the inner wall of the diffuser, is simultaneously moved parallel to the longitudinal axis of the diffuser.
- FIG. 1 A diffuser 1 with an ideally conical contour closes with a cylindrical Connecting flange 2 to a turbine (not shown) of an exhaust gas turbocharger.
- To the widened end 3 of the diffuser 1 includes a cylindrical portion 4 with a Exhaust flap 5 on.
- the exhaust flap 5 is pivotable on one in the housing of the cylindrical section 4 supported by a flange 7 held shaft 6.
- the Minimum length of the cylindrical section 4 is determined by the inclination of the Exhaust flap 5.
- One end 8 of the cylindrical section 4 is connected to a connecting flange 9 attachable.
- a section through the cylindrical portion 4 along the central plane of the Exhaust flap 5 in the inclined position shown results in an ellipse.
- Fig. 2 Corresponding features are provided with the reference numerals from Fig. 1.
- the Diffuser 10 closes with the cylindrical connecting flange 2 Turbine (not shown) of an exhaust gas turbocharger.
- the clear width of the clear width at the end 8 of the cylindrical Section 4 corresponds to FIG. 1, includes via the connecting flange 9 Compensator.
- the exhaust flap 5 is inside the conical part of the diffuser 10 pivotable on the shaft 6 held in the housing of the diffuser 10 with the flange 7 stored.
- the axis 11 of the shaft 6 lies, as shown, in the axis of symmetry of the Exhaust flap 5, d.
- the axis 11 meets the longitudinal axis of a circular cylinder, which with a Eccentricity e to the longitudinal axis 12 of the diffuser 1 lies.
- the axis 11 of the shaft 6 is thus eccentric to the longitudinal axis 12 of the diffuser.
- the axis 11 of the shaft 6 does not have to inevitably lie in the axis of symmetry of the exhaust flap.
- the axis 11 can also Be arranged outside the axis of symmetry of the exhaust flap to an independent To achieve closing through the exhaust gas flow.
- the inner wall 13 of the diffuser 10 is formed with a coherent band, that runs along the inner circumference of the diffuser 10 as section 14. This tape will already adapted during casting to the exhaust flap 5, so that on the inner wall 13 of the Diffuser 10 wall segments 15 result, which are band-shaped along the circumference of the Exhaust flap 5 extend and substantially parallel to the longitudinal axis 12 of the diffuser 10 are aligned.
- the wall segments 15 lie on the circular cylinder mentioned, whose Longitudinal axis runs at a distance e parallel to the longitudinal axis 12 of the diffuser 10.
- the Diameter of the circular cylinder corresponds to the diameter of a circular area through Projection of the exhaust flap in the direction of the longitudinal axis 12 arises.
- the eccentricity is e preferably to be chosen such that the longitudinal axis of the circular cylinder through the Geometric center of the exhaust flap 5 runs.
- the deviation of the contour of the Diffuser 10 compared to the ideally conical diffuser 1 can be selected by the Eccentricity e can be minimized.
- the band-like interconnected Wall segments 15 are preferably machined with a circular milling, with a Milling tool (not shown) while it is the contour of the inner wall 13 of the diffuser 10 follows, simultaneously parallel to the longitudinal axis of the diffuser 10 along the connected band is moved.
- the minimum length of the diffuser 10 depends on the inclined position of the exhaust flap 5 and the inside width of the diffuser 10.
- the eccentricity e of the longitudinal axis 12 of the Diffuser 10 to the longitudinal axis of the circular cylinder is a function of the inclination of the Exhaust flap 5 and the opening angle of the diffuser 10.
- the width of the wall segments must be kept as small as possible to minimize the disturbance of the exhaust gas flow.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Description
- Fig. 1
- eine Seitenansicht eines Diffusors mit einer Abgasklappe in einem anschließenden zylindrischen Abschnitt gemäß dem Stand der Technik, und
- Fig. 2
- eine Seitenansicht eines Diffusors mit einer Abgasklappe gemäß der Erfindung.
Claims (6)
- Abgasklappenanordnung für eine Abgasleitung einer Brennkraftmaschine mit einem im Verlauf der Abgasleitung angeordneten Diffusor (10), der konzentrisch zu einer Längsachse (12) liegt, und mit einer elliptischen Abgasklappe (5), die auf einer zur Längsachse (12) senkrechten Welle (6) schwenkbar angeordnet ist, dadurch gekennzeichnet, daß
eine Innenwand (13) des Diffusors (10) mit auf einem Kreiszylinder liegenden Wandsegmenten (15) versehen ist, die sich bandförmig entlang des Umfangs der Abgasklappe (5) erstrecken und im wesentlichen parallel zur Längsachse (12) des Diffusors ausgerichtet sind. - Abgasklappenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Welle (6) exzentrisch zur Längsachse (12) des Diffusors (10) angeordnet ist.
- Abgasklappenanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Welle (6) exzentrisch zur Längsachse des Kreiszylinders angeordnet sind, den die Wandsegmente (15) aufspannen.
- Abbgasklappenanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Welle (6) in einer Symmetrieachse der Abgasklappe (5) verläuft.
- Abgasklappenanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die bearbeiteten Wandsegmente (15) konstante Breite aufweisen.
- Abgasklappenanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Oberfläche der Wandsegmente (15) durch Zirkularfräsung bearbeitet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19607219 | 1996-02-26 | ||
DE19607219A DE19607219A1 (de) | 1996-02-26 | 1996-02-26 | Abgasklappenanordnung für eine Abgasleitung einer Brennkraftmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0791734A2 EP0791734A2 (de) | 1997-08-27 |
EP0791734A3 EP0791734A3 (de) | 1998-04-01 |
EP0791734B1 true EP0791734B1 (de) | 2001-06-06 |
Family
ID=7786495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102833A Expired - Lifetime EP0791734B1 (de) | 1996-02-26 | 1997-02-21 | Abgasklappenanordnung für eine Abgasleitung einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0791734B1 (de) |
DE (2) | DE19607219A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4051286B2 (ja) * | 2001-01-16 | 2008-02-20 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | フラップ弁 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH310602A (de) * | 1948-09-25 | 1955-10-31 | Buechi Alfred | Verfahren und Einrichtung zur Spülung und Aufladung von Brennkraftmaschinen. |
GB783900A (en) * | 1955-02-25 | 1957-10-02 | Thomas Ash & Company Ltd | Improvements in or relating to exhaust brakes for vehicles |
US4111166A (en) * | 1977-02-07 | 1978-09-05 | Caterpillar Tractor Co. | Engine mounted exhaust brake |
US5079921A (en) * | 1990-06-11 | 1992-01-14 | Navistar International Transporation Corp. | Exhaust back pressure control system |
-
1996
- 1996-02-26 DE DE19607219A patent/DE19607219A1/de not_active Withdrawn
-
1997
- 1997-02-21 EP EP97102833A patent/EP0791734B1/de not_active Expired - Lifetime
- 1997-02-21 DE DE59703705T patent/DE59703705D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0791734A3 (de) | 1998-04-01 |
DE59703705D1 (de) | 2001-07-12 |
EP0791734A2 (de) | 1997-08-27 |
DE19607219A1 (de) | 1997-08-28 |
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