DE2721956A1 - Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas - Google Patents

Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas

Info

Publication number
DE2721956A1
DE2721956A1 DE19772721956 DE2721956A DE2721956A1 DE 2721956 A1 DE2721956 A1 DE 2721956A1 DE 19772721956 DE19772721956 DE 19772721956 DE 2721956 A DE2721956 A DE 2721956A DE 2721956 A1 DE2721956 A1 DE 2721956A1
Authority
DE
Germany
Prior art keywords
exhaust gas
wall
zone
pipe
internal combustion
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.)
Ceased
Application number
DE19772721956
Other languages
German (de)
Inventor
Hans Karl Dr Leistritz
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19772719634 external-priority patent/DE2719634A1/en
Application filed by Individual filed Critical Individual
Priority to DE19772721956 priority Critical patent/DE2721956A1/en
Priority to IT22649/78A priority patent/IT1095302B/en
Priority to JP4868178A priority patent/JPS5416041A/en
Priority to GB16521/78A priority patent/GB1603962A/en
Priority to US05/900,247 priority patent/US4233812A/en
Priority to BE187201A priority patent/BE866483A/en
Priority to FR7812561A priority patent/FR2388993A1/en
Publication of DE2721956A1 publication Critical patent/DE2721956A1/en
Ceased legal-status Critical Current

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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • 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
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023—Helmholtz resonators
    • 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
    • F01N13/16—Selection of particular materials
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • 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
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
    • 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
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/10—Tubes having non-circular cross section
    • 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
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • 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
    • F01N2470/26—Tubes being formed by extrusion, drawing or rolling
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/14—Dead or resonance chambers connected to gas flow tube by relatively short side-tubes
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • 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

A silencer forming part of the exhaust system of an internal combustion engine consists of two concentric tubes (51, 52). These tubes are joined by radial walls (55) which extend longitudinally so that the annular space between the tubes is divided into a number of separate compartments (5). A cooling fluid flows in these compartments (5) in the opposite direction to the flow of gas in the central bore (50). The outer wall of the outer tube (52) has a number of radial fins (56) which also extend longitudinally. These fins help to dissipate the heat which has been transferred to the cooling medium by convection and radiation.

Description

Zusatzanmelaung zur Patentanmeldung P 27 19 634.5 (eigenes Zei-Additional registration for patent application P 27 19 634.5 (own time

chen lei S 773).chen lei S 773).

Bezeichnung : Thermische Abgasführung Zusatz 3.Designation: Thermal exhaust gas routing addendum 3.

Beschreibung Die Patentanmeldung P 27 19 634.5 beschreibt für die Abgasanlagen von Brennkraftmaschinen ein System der thermischen Abgasführung zum Zwecke des Einsatzes von Bauteilen, welche im Strangpreßverfahren aus Aluminium gefertigt werden. Letzteres setzt thermische Grenzen und in den Ansprüchen 4 und 5 ist dargestellt, daß zur Herabsetzung der Abgaseinlauftemperatur in die Aluminiumteile in der vorhergehenden Durchlaufzone ein Wärmetausch zu einer in den Gesamtkörper integrierten Frischluftdurchsatzzone stattfindet, wobei der Frischluftdurchsatz durch einen Ejektor betrieben wird, der darin besteht, daß ein querschnittsengeres Luftrohr in den stromaufwärtigen Teil des Austrittsrohres hineinragt. Es ist die Aufgabe dieser Zusatzanmeldung, eine wesentliche Verbesserung dieser Wärmeabfuhr dadurch zu erreichen, daß ein den ganzen Gerätkörper durchdringendes Innenkühlrohr als Ijuft durchsatzzone verwendet wird, wie es in der deutschen Offenlegungsschrift 25 10 624 des Anmelders beschrieben wird. Diese Maßnahme bringt zunächst eine erhebliche Vergrößerung der Wärmetauschfläche und sonstige konstruktive Vorteile, die hier nicht beschrieben zu werden brauchen. Darüber hinaus zeigt die beiliegende Figur 1 eine konstruktive Anordnung eines zweifachen thermischen Kurzschlußweges, mit dessen Hilfe es erreicht wird, daß jene Wärmemenge, welche direkt aus dem Zulaufrohr (1) das Innenkühlrohr (8) außen beaufschlagt, auf einem Wege, der so kurz ist wie der Durchmesser des Innenkühlrohres (8), zur Austrittsleitung (9), d.h. in den Luftejektor (7/9), gelangt und damit zum Gerätaustritt. Auf diese Weise wird der übrige Teil des Rohres 8 von diesem Wärmeanfall entlastet und erfährt hierdurch eine Steigerung seines Wirkungsgrades. Das Abgas gelangt, wie die Schemazeichnung zeigt, aus dem Entspannungsraum 2 in eine Abstrahlzone 4 zur freien Atmosphäre und von dort durch die Teilstromkanäle des Aluminium-Hohlkammer-Ringraumes 5, der ebenfalls, und zwar mit noch größerer Oberfläche, in die freie Atmosphäre abstrahlt. Description The patent application P 27 19 634.5 describes for the Exhaust systems of internal combustion engines a system of thermal exhaust gas routing for Purpose of the use of components, which in the extrusion process from aluminum are manufactured. The latter sets thermal limits and in claims 4 and 5 is shown that to reduce the exhaust gas inlet temperature in the aluminum parts in the preceding pass-through zone there is a heat exchange to one in the entire body integrated fresh air throughput zone takes place, the fresh air throughput is operated by an ejector, which consists in the fact that a cross-section narrower Air pipe protrudes into the upstream part of the outlet pipe. It is the Task of this additional application, a substantial improvement of this heat dissipation to achieve that the whole device body penetrating inner cooling tube is used as Ijuft throughput zone, as it is in the German Offenlegungsschrift 25 10 624 of the applicant is described. This measure initially brings a substantial Enlargement of the heat exchange surface and other structural advantages here need not be described. In addition, the accompanying figure shows 1 shows a structural arrangement of a double thermal short-circuit path, with the help of which it is achieved that that amount of heat, which is directly from the inlet pipe (1) the inner cooling pipe (8) acted on the outside, on a path that is as short as the diameter of the inner cooling pipe (8) to the outlet line (9), i.e. into the air ejector (7/9), and thus to the device outlet. This way the rest of the part of the pipe 8 is relieved of this heat accumulation and experiences an increase as a result its efficiency. As the schematic drawing shows, the exhaust gas comes out of the Relaxation room 2 in a radiation zone 4 to the free atmosphere and from there through the partial flow channels of the aluminum hollow chamber annular space 5, the also, with an even larger surface, radiates into the free atmosphere.

Aus diesem Aluminiumbauteil, bzw. bei der Doppelanordnung der Figur 1, aus diesen beiden Aluminiumbauteilen (5) betritt ein bereits außerordentlich heruntergekühltes Abgas mm den Sammelraum 6, an welchen die Abgasaustrittsleitung 7 angeschlossen ist. Hierbei erfolgt, und das ist der zweite Kurzschlußweg, im Wärmetausch zu den sehr heißen Wandungen des Zulaufrohres 1 und des Entspannungsraumes 2, soweit sie den Sammelraum 6 innen begrenzen, ein Wärmetransport zur Austrittsleitung 7. Unterstützt wird diese thermische Gesamtführung des Abgases durch zwei weitere Maßnahmen : erstens erfolgt die Abgasbeaufschlagung aus dem heißen Zulaufrohr 1 durch eine Teilstromaufteilung 12 relativ großer Fläche, wodurch der Wärmeeinlauf in die Mantelwandung 8 verbessert wird; zweitens ist die Innenwandung des Aluminium-Hohlkammer-Ringraumes 5 gegenüber dem Entspannungsraum 2 isoliert (15). Sofern weitere akustische Vorteile mit dieser Anordnung erzielt werden sollen, kann die Aluminium-Innenwandung gegenüber der Isolationsschicht 15 mit einer Aussparung in voller Längserstreckung versehen sein, wie sie in Anspruch 1 der in diesen Zusammenhang gehörenden Zusatzanmeldung P 27 20 558.9 beschrieben ist.From this aluminum component, or in the double arrangement of the figure 1, from these two aluminum components (5) one enters an already extraordinary cooled exhaust gas mm the collecting space 6, to which the exhaust gas outlet line 7 is connected. This takes place, and this is the second short-circuit path, in the heat exchange to the very hot walls of the inlet pipe 1 and the expansion space 2, so far they delimit the collecting space 6 on the inside, a heat transfer to the outlet line 7. This overall thermal management of the exhaust gas is supported by two further measures : First, the exhaust gas admission from the hot inlet pipe 1 takes place through a Partial flow distribution 12 relatively large area, whereby the heat inlet into the shell wall 8 is improved; second is the inner wall of the aluminum hollow chamber annulus 5 isolated from the relaxation room 2 (15). If there are other acoustic advantages to be achieved with this arrangement, the aluminum inner wall can opposite the insulation layer 15 is provided with a recess in its full longitudinal extension as it is in claim 1 of the additional application belonging in this context P 27 20 558.9 is described.

LeerseiteBlank page

Claims (5)

Patentansprüche 1. Thermische Abgasführung nach den Ansprüchen 4 und5 der Patentanmeldung P 27 19 634.5 mit dem aluminlumgefertigten Bauelement eines Hohlkammerringraumes, das in Schalldämpfer bzw. Kühlstrecken der Abgasanlagen von Brennkraftmaschinen integriert ist und dessen Eintrittsöffnungen eine Abgasdurchlaufzone vorgelager ist, die Wärmetauschwandung zu einer in den Gesamtkörper integrierten Frischluftdurchsatzzone aufweist, dadurch gekennzeichnet, daß diese Luftdurchsatzzone ein rohr- oder profilartiger Luftführungsraum ist, der das Gerät in seiner Längserstreckung durchdringt und mindestens eine Oeffnung zur freien Atmosphäre hat, wobei der Luftdurchsatz durch Luftejektion in den stromaufwärtigen Teil des Abgasaustrittsrohres oder auf andere Weise erfolgt. Claims 1. Thermal exhaust gas routing according to Claims 4 und5 of the patent application P 27 19 634.5 with the aluminum-made component one Hollow chamber annulus, which is in silencers or cooling sections of the exhaust systems of Internal combustion engine is integrated and its inlet openings an exhaust gas flow zone is upstream, the heat exchange wall is integrated into the overall body Having fresh air throughput zone, characterized in that this air throughput zone is a tube-like or profile-like air guide space, which the device in its longitudinal extension penetrates and has at least one opening to the free atmosphere, the air throughput by air injection into the upstream part of the exhaust gas outlet pipe or on done other way. 2. Thermische Abgasführung nach vorigem Anspruch dadurch gekennzeichnet, daß die Eintrittsleitung in den Luftejektor (9) 80 angeordnet ist, daß sie der Heißgasbeaufschlagungszone (12) des Zu laufrohres (1) etwa gegenüberliegt.2. Thermal exhaust gas routing according to the previous claim, characterized in that that the inlet line is arranged in the air ejector (9) 80 that it is the hot gas admission zone (12) of the pipe (1) is approximately opposite. 3. Thermische Abgasführung nach einem der vorigen Ansprüche dadurch gekennzeichnet, daß das Zulaufrohr (1) die äußere Wandung des Innenkühlrohres (8) aus einer Auslaufbrause (12) beaufschlagt.3. Thermal exhaust gas system according to one of the preceding claims characterized in that the inlet pipe (1) the outer wall of the inner cooling pipe (8) acted upon from a shower outlet (12). 4. Thermische Abgasführung nach einem der vorigen Ansprüche dadurch gekennzeichnet, daß die Innenwandung des aluminiumgefertig ten Hohlkammer-Ringraumes gegenüber dem Gerätinnenraum (2) isoliert ist.4. Thermal exhaust gas system according to one of the preceding claims characterized in that the inner wall of the aluminum-manufactured th hollow chamber annulus is isolated from the interior of the device (2). 5. Thermische Abgasführung nach vorigem Anspruch dadurch gekennzeichnet, daß die Innenwandung des Ringraumes je Teilstromführungskanal mit einer Aussparung versehen ist, soweit sie der Isolationsschicht (15) gegenüberliegt.5. Thermal exhaust gas routing according to the previous claim, characterized in that that the inner wall of the annular space per partial flow guide channel with a recess is provided as far as it is opposite the insulation layer (15).
DE19772721956 1977-04-28 1977-05-14 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas Ceased DE2721956A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE19772721956 DE2721956A1 (en) 1977-05-03 1977-05-14 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas
IT22649/78A IT1095302B (en) 1977-04-28 1978-04-24 CONDUCTION SYSTEM FOR GAS APPLIANCES WITH DISCHARGE IN THE FREE ATMOSPHERE, IN PARTICULAR FOR MOTOR DRIVE ELEMENTS
JP4868178A JPS5416041A (en) 1977-04-28 1978-04-24 Multipleewall hollow mold material with blockade body for guiding thermal gas
GB16521/78A GB1603962A (en) 1977-04-28 1978-04-26 Gas discharge apparatus
US05/900,247 US4233812A (en) 1977-04-28 1978-04-26 Gas discharge apparatus
BE187201A BE866483A (en) 1977-04-28 1978-04-27 GAS CONDUCTION DEVICE AND HOLLOW PROFILES FOR ITS REALIZATION
FR7812561A FR2388993A1 (en) 1977-04-28 1978-04-27 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772719634 DE2719634A1 (en) 1977-05-02 1977-05-03 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas
DE19772721956 DE2721956A1 (en) 1977-05-03 1977-05-14 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas

Publications (1)

Publication Number Publication Date
DE2721956A1 true DE2721956A1 (en) 1978-11-16

Family

ID=25771958

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772721956 Ceased DE2721956A1 (en) 1977-04-28 1977-05-14 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas

Country Status (1)

Country Link
DE (1) DE2721956A1 (en)

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