DD286727A7 - EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - Google Patents
EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE Download PDFInfo
- Publication number
- DD286727A7 DD286727A7 DD89326597A DD32659789A DD286727A7 DD 286727 A7 DD286727 A7 DD 286727A7 DD 89326597 A DD89326597 A DD 89326597A DD 32659789 A DD32659789 A DD 32659789A DD 286727 A7 DD286727 A7 DD 286727A7
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- cylindrical part
- exhaust system
- diffuser
- cone
- power
- Prior art date
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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
- F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Auspuffanlage fuer eine Brennkraftmaschine, bestehend aus einem leistungsbestimmenden Teil mit den Komponenten Auspuffrohr * Diffusor * Gegenkonen (6 und 15) und zylindrischer Teil (5 und 14), wobei der Diffusor (4) teilweise in das zylindrische Teil * welches am vorderen Ende offen ist, hineinragt und einen Ringspalt (7) bildet und dasz das zylindrische Teil (5) von einem zweiten zylindrischen Teil (14) teilweise umschlossen wird, so dasz ein zweiter Ringspalt (17) entsteht, wobei das zylindrische Teil (14) an beiden Enden (9 und 18) durch die Gegenkonen (6 und 15) mit dem zylindrischen Teil (5) und dem Diffusor (4) verbunden ist. Fig. 1{Auspuffanlage; Brennkraftmaschine; leistungsbestimmender Teil; Auspuffrohr; Gegenkonen; zylindrischer Teil; Diffusor; Ringspalt}Exhaust system for an internal combustion engine, consisting of a power-determining part with the components exhaust pipe * diffuser * counter-cones (6 and 15) and cylindrical part (5 and 14), wherein the diffuser (4) partially in the cylindrical part * which is open at the front end , protrudes and forms an annular gap (7) and that the cylindrical part (5) is partially enclosed by a second cylindrical part (14), so that a second annular gap (17) is formed, wherein the cylindrical part (14) at both ends ( 9 and 18) is connected by the counter-cones (6 and 15) with the cylindrical part (5) and the diffuser (4). Fig. 1 {exhaust system; Internal combustion engine; performance determining part; Exhaust pipe; Mating cones; cylindrical part; diffuser; Annular gap}
Description
Die Auspuffanlage besteht aus einem leistungsbestimmenden Teil mit einem Auspuffrohr 3, einem Diffusor 4 und einem zylindrischen Teil 5, an das sich ein Auspuffdämpfer 12 anschließt. In das zylindrische Teil 5, welches an seinem vorderen Ende offen ist, ragt der Diffusor 4 hinein und bildet am Diffusoraustritt Im Querschnitt 8 mit dem zylindrischen Teil 5 einen Ringspalt 7. Das zylindrische Teil 5 wird von einem zweiten, im Durchmesser größeren, zylindrischen Teil 14 teilweise umschlossen, wodurch zwischen den beiden zylindrischen Teilen 5 und 14 im Querschnitt 16 ein zweiter Ringspalt 17 entsteht. Am vorderen Ende 9 ist dar ylindrischeTeil 14mitdemDiffusor4bzw.Auspuffrohr30bereinenGegenkonus 15 und am hinteren Ende 18 durch einen Gegenkonus β mit dem zylindrischen Teil 5 verbunden. Als Gegenkonus 15 kann auch eine gerade Wand vorgesehen sein. Die Reflexionslänge ergibt sich aus:The exhaust system consists of a power-determining part with an exhaust pipe 3, a diffuser 4 and a cylindrical part 5, to which an exhaust damper 12 connects. The diffuser 4 projects into the cylindrical part 5, which is open at its front end, and forms an annular gap 7 at the diffuser outlet 8 with the cylindrical part 5. The cylindrical part 5 is formed by a second, larger diameter, cylindrical part 14 partially enclosed, whereby between the two cylindrical parts 5 and 14 in cross section 16, a second annular gap 17 is formed. At the front end 9, the cylindrical part 14 is connected to the diffuser 4 and the exhaust pipe 30b to a countercone 15 and at the rear end 18 to the cylindrical part 5 by a countercone β. As a counter-cone 15 may also be provided a straight wall. The reflection length results from:
K KK K
' LR = LA+ LK+ LD+ J Ι-2'+ Σ LGi/2 mitK = 2'LR = LA + LK + LD + J Ι- 2 ' + Σ LGi / 2 with K = 2
I = I I = KI = I I = K
In Fig.3 sind an Stelle des Gegenkonus 15 im zylindrischen Teil 14 im Bereich des Diffusors 4 im Durchmesser gestaffelte Blenden 13 vorgesehen, welche fest mit dem Diffusor 4 bzw. dem zylindrischen Teil 14 verbunen sind. Während des Auslaßvorganges ergibt sich nach Fig. 1 folgender Ablauf: Die Vorauslaßdruckwelle aus dem Auslaß 1 durchläuft den Auslaßkanal 2 und das Auspuffrohr 3. Danach passiert diese Druckwelle den Diffusor 4.In Figure 3 staggered apertures 13 are provided in place of the counter-cone 15 in the cylindrical portion 14 in the region of the diffuser 4, which are fixedly connected to the diffuser 4 and the cylindrical portion 14. During the exhaust operation results in the following sequence according to FIG. 1: The pre-discharge pressure wave from the outlet 1 passes through the outlet channel 2 and the exhaust pipe 3. Thereafter, this pressure wave passes through the diffuser 4.
Durch die stetige Querschnittserweiterung des Diffusors 4 werden negative Druckwellen (rücklaufender Wellenanteil) an den Auslaß 1 zurückgeschickt, die den Spülvorgang des Zylinders nachhaltig unterstützen. Im Querschnitt B liegt für die vorlaufende Druckwelle eine plötzliche Querschnittserweiterung vor, die eine ausgeprägte negative Reflexion zur Folge hat, welche einerseits eine rücklaufende negative Druckwelle zum Auslaß 1 erzeugt und andererseits als vorlaufende Unterdn ckwelle in Richtung Gegenkonus 15 läuft. Damit wird die Laufrichtung der Druckwelle geändort. Im Querschnitt 10 tritt erneut eine plötzliche Querschnittoerweiterung auf, so daß wiederum eine negative Reflexion einmal in Richtung Querschnitt 8 und zum anderen in Richtung Gegenkonus β erfolgt. Damit wird die Laufrichtung der Druckwelle erneut geändert. Am Gegenkonus P wird infolge Querschnittsverengung die ankommende Überdruckwelle gleichpolig reflektiert, was wiederum zu einer Umkehr der Laufrichtung dar Druckwelle führt. Im Querschnitt 10 existiert für die ankommende positive Druckwelle eine plötzliche Querschnittserweiterung, die die Polarität der Druckwelle wechseln läßt. Somit läuft dann eine Unterdruckwelle in Richtung Querschnitt 8, da» heißt die Laufrichtung der Druckwelle hat sich erneut geändert. Am Querschnitt 8, wo wiederum eine Querschnittsänderung vorliegt, wird die Polarität der ankommenden Druckwelle erneut gewechselt. Bei richtiger Abstimmung ermöglicht diese Druckwelle eine Nachladung des Zylinders vor Abschluß des Auslaßvorganges. Der dargestellte Verlauf der Reflexionen im leistungsbest; nmenden Teil stellt nur einen vereinfachten Mechanismus dar. Neben den beschriebenen Vorgängen treten noch eine Vielzahl andorer Reflexionen auf.Due to the continuous cross-sectional widening of the diffuser 4 negative pressure waves (returning shaft portion) are sent back to the outlet 1, which support the flushing process of the cylinder sustainably. In cross-section B is for the leading pressure wave before a sudden cross-sectional expansion before, which has a pronounced negative reflection result, which on the one hand generates a returning negative pressure wave to the outlet 1 and on the other hand runs as a leading Unterdn ckwelle in the direction counter cone 15. Thus, the direction of the pressure wave is divulged. In cross-section 10 occurs again a sudden Querschnittsoerweiterung, so that in turn takes place a negative reflection once in the direction of cross section 8 and the other in the direction of counter cone β. This changes the running direction of the pressure wave again. As a result of cross-sectional constriction, the incoming overpressure wave is reflected at the same polarity on the opposite cone P, which in turn leads to a reversal of the running direction of the pressure wave. In cross-section 10 exists for the incoming positive pressure wave, a sudden cross-sectional widening, which can change the polarity of the pressure wave. Thus, then runs a vacuum wave in the direction of cross section 8, since »means the direction of the pressure wave has changed again. At the cross section 8, where again there is a change in cross section, the polarity of the incoming pressure wave is changed again. If properly tuned this pressure wave allows recharging the cylinder before completion of the exhaust operation. The illustrated course of the reflections in the best performance ; This section is only a simplified mechanism. In addition to the described processes, a large number of other reflections occur.
So erfolgen z.B. Reflexionen beim Rücklauf der Druckwelle in den Diffusor 4, da dann ja eine kontinuierliche Querschnittsverengung vorhanden ist oder es ist mit Reflexionen der Druckwellenanteile zu rechnen, die in den Abströmraum 11 des zylindrischen Teils 5 hineinragen oder auch am Gegenkonus 15.For example, e.g. Reflections in the return of the pressure wave in the diffuser 4, since then yes, a continuous cross-sectional constriction is present or it is to be expected with reflections of the pressure wave components, which protrude into the outflow 11 of the cylindrical portion 5 or at the counter cone 15th
Claims (2)
Fig. 2: ein Diagramm mit dem optimalen Druckverlauf am Auslaß,
Fig.3: zwei Ausschnitte einer Auspuffanlage mit im Durchmesser gestaffelte Blenden.1: an exhaust system for a two-stroke Brennkraftmascl.liie,
2 shows a diagram with the optimal pressure curve at the outlet,
3 shows two sections of an exhaust system with staggered in diameter aperture.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD89326597A DD286727A7 (en) | 1989-03-15 | 1989-03-15 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
DE3926921A DE3926921A1 (en) | 1989-03-15 | 1989-08-16 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
GB8922139A GB2229224A (en) | 1989-03-15 | 1989-10-02 | I.c. engine exhaust system |
FR8914268A FR2644510A1 (en) | 1989-03-15 | 1989-10-31 | EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE |
JP1287253A JPH02248612A (en) | 1989-03-15 | 1989-11-02 | Exhaust device for internal combustion negine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD89326597A DD286727A7 (en) | 1989-03-15 | 1989-03-15 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
Publications (1)
Publication Number | Publication Date |
---|---|
DD286727A7 true DD286727A7 (en) | 1991-02-07 |
Family
ID=5607737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DD89326597A DD286727A7 (en) | 1989-03-15 | 1989-03-15 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPH02248612A (en) |
DD (1) | DD286727A7 (en) |
DE (1) | DE3926921A1 (en) |
FR (1) | FR2644510A1 (en) |
GB (1) | GB2229224A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT3206U1 (en) * | 1998-10-07 | 1999-11-25 | Avl List Gmbh | EXHAUST SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE |
CN102482964B (en) | 2009-08-28 | 2014-01-29 | 丰田自动车株式会社 | Exhaust apparatus for an internal combustion engine |
WO2011161042A1 (en) * | 2010-06-22 | 2011-12-29 | Bekaert Combustion Technology B.V. | Fluegas slit cavity muffler |
JP5870488B2 (en) * | 2011-01-20 | 2016-03-01 | マツダ株式会社 | Intake and exhaust system for multi-cylinder engine |
GB202111213D0 (en) * | 2021-08-03 | 2021-09-15 | Mclaren Automotive Ltd | Improved sound bypass |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB790330A (en) * | 1954-09-27 | 1958-02-05 | Schweizerische Lokomotiv | Improvements in or relating to a supercharged four-stroke-cycle internal combustion engine |
US3665712A (en) * | 1970-02-09 | 1972-05-30 | William L Tenney | Two-cycle engine resonance exhaust system |
DK128427B (en) * | 1971-11-24 | 1974-04-29 | Silentor As | Muffler. |
GB1513473A (en) * | 1974-08-28 | 1978-06-07 | Yamaha Motor Co Ltd | Method and apparatus for silencing the exhaust noise of internal combustion engines |
JPS5813738B2 (en) * | 1977-07-15 | 1983-03-15 | 川崎重工業株式会社 | Exhaust pipe for 2-stroke engine |
JPS5813739B2 (en) * | 1977-07-15 | 1983-03-15 | 川崎重工業株式会社 | Exhaust pipe for 2-stroke engine |
JPS63968Y2 (en) * | 1981-04-08 | 1988-01-12 | ||
JPH0689668B2 (en) * | 1986-06-19 | 1994-11-09 | ヤマハ発動機株式会社 | Exhaust system for 2-cycle engine |
JPH0681901B2 (en) * | 1986-06-19 | 1994-10-19 | ヤマハ発動機株式会社 | Exhaust system for 2-cycle engine |
SE464097B (en) * | 1987-06-18 | 1991-03-04 | Claes Linden | EXHAUST RANGE EXPLAINED AS A RESONATOR ON A COMBUSTION ENGINE |
DD271734A1 (en) * | 1988-05-04 | 1989-09-13 | Fortschritt Veb K | EXHAUST SYSTEM FOR SECONDARY MOTOR MOTORS |
-
1989
- 1989-03-15 DD DD89326597A patent/DD286727A7/en unknown
- 1989-08-16 DE DE3926921A patent/DE3926921A1/en not_active Withdrawn
- 1989-10-02 GB GB8922139A patent/GB2229224A/en not_active Withdrawn
- 1989-10-31 FR FR8914268A patent/FR2644510A1/en not_active Withdrawn
- 1989-11-02 JP JP1287253A patent/JPH02248612A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2229224A (en) | 1990-09-19 |
GB8922139D0 (en) | 1989-11-15 |
DE3926921A1 (en) | 1990-09-27 |
JPH02248612A (en) | 1990-10-04 |
FR2644510A1 (en) | 1990-09-21 |
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