DE2221167A1 - AFTERBURNING ROOM WALL - Google Patents

AFTERBURNING ROOM WALL

Info

Publication number
DE2221167A1
DE2221167A1 DE19722221167 DE2221167A DE2221167A1 DE 2221167 A1 DE2221167 A1 DE 2221167A1 DE 19722221167 DE19722221167 DE 19722221167 DE 2221167 A DE2221167 A DE 2221167A DE 2221167 A1 DE2221167 A1 DE 2221167A1
Authority
DE
Germany
Prior art keywords
ceramic
metal layer
interior
metallic lining
wall
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.)
Pending
Application number
DE19722221167
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
Application filed by Individual filed Critical Individual
Priority to DE19722221167 priority Critical patent/DE2221167A1/en
Priority to IT2236073A priority patent/IT983630B/en
Publication of DE2221167A1 publication Critical patent/DE2221167A1/en
Priority to DE19772722422 priority patent/DE2722422A1/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/14Exhaust 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 having thermal insulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/26Construction of thermal reactors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/24Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00Surface coverings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00Selection of materials for tubes, chambers or housings

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Description

Patentanmeldung mit der Bezeichnung "Nachbrennraum-Wandung' Beschreibung Die Konstruktion von Nachbrenaern für Verbrennungsmotoren erfordert die Realisierung der Voraussetzungen für zwei verschiedene Funktionen : erstens für eine Speicherung von Nachbrennerwärme, zweitens für ein schnelles Erreichen des erforderlichen Temperaturniveaus, um auch extrem magere Gemische zur Oxydation zu bringen, In beiden Fällen spielt die Reaktormasse eine besondere Rolle. Eine grosse Reaktormasse begünstigt naturgemäss das Speichervermögen des Gerätes. Infolge ihrer starken Wärmeaufnahme verzögert sie aber zugleich das Erreichen des Temperaturniveaus aus der Situation des Baltstarts. Unter dem Gesichtspunkt der vorliegenden Massenverhältnisse ist für diesen Betriebszustand, den Nachbrennerstart aus dem Saltzustand, eine möglichst kleine Reaktormasse am gunstigsten. Die vorliegende Erfindung hat die Aufgabe, diese beiden einander konträren Gesichtspunkte in einer Konstruktion zu lösen, und der Erfindungsgedanke besteht vornehmlich datin, dies durch die Ausnutzung der verschiedenen Wärmeleitfähigkeit verschiedener Werkstoffe und durch deren geeignete konstruktive Zuordnung zu erreichen. Patent application with the designation "Nachbrennraum-Wandung" description The construction of afterburners for internal combustion engines requires implementation the requirements for two different functions: firstly, for storage of afterburner heat, secondly for a quick achievement of the required temperature level, in order to cause even extremely lean mixtures to oxidize, in both cases it plays a role the reactor mass plays a special role. A large reactor mass naturally favors the storage capacity of the device. Delayed due to their strong heat absorption but at the same time they reached the temperature level from the situation of the Baltic start. From the point of view of the existing mass ratios, for this operating state, the afterburner start from the salt state, the smallest possible reactor mass on cheapest. The present invention seeks to contradict these two Solve aspects in a construction, and the inventive idea exists mainly datin, this through the use of the different thermal conductivity different materials and through their appropriate constructive allocation.

In der Figur 1 wird als Schemabeispiel die Umkehrwandung einer Umkohrspülungsnachbrennkammer gezeigt, wie sie durch Patente des Anmelders, z.B. das österreichische Patent Nr. 248802 Anspräche 1 und 22 bis 24, bekannt geworden ist. Sie besteht aus einer keramischen Masse 4, welche an der Innenseite des Brennraumes mit Metall (2) beschichtet ist. An der Aussenseite ist Isolationsmaterial (22), das durch einen Blechaantel (6) gehaltert wird. Die innere Mitallbeschichtung dient zugleich als Leitmaterial für einen Zündfunken, dessen Plusleitung (1) die Keramik durchdringt und in einer Oeffnung (3) endet, welche sich in der i tallschicht (2) befindet. Letztere hat Masseverbindung.In FIG. 1, the reverse wall of a reverse-flush afterburning chamber is shown as a schematic example shown as it is through patents of the applicant, e.g. the Austrian patent no. 248802 Talks 1 and 22 to 24, has become known. It consists of a ceramic Compound 4, which is coated with metal (2) on the inside of the combustion chamber. On the outside is insulation material (22), which is covered by a sheet metal jacket (6) is held. The inner Mitall coating also serves as a conductive material for an ignition spark whose positive lead (1) penetrates the ceramic and is in an opening (3) ends, which is located in the tall layer (2). The latter has a ground connection.

In der Figur 2 ist die Metallschicht (?) nicht in ihrer ganzen Fläche kontakt~ nah als Beschichtung der keramischen Fläche (4) ausgefUhrt, sondern bombiert in der Weise, dass verwendetes Chromnickelstahlblech freien Raum für seine Warmeausdehnung vorfindet. Die Lochung 3 der Metallschicht (2) der Figur 1 ist in Figur 2 durch den Innenraum eines Rohres t20) ersetzt, in welchen der Pluspol (1) hineinragt. Zugleich wird hierdurch ein Innenraum 21 gescha!£en, in welchem das Gemisch Abgas/Zusatzluft der von der Wandung 4 ausgehenden Wärmestrahlung in besonders intensiver Weise unterliegt. Die Lochungen (5) sorgen dafür, dass auch im Raum 21 ein fluktuierender Gaswechsel stattfindet, welcher dem quantenweisen Abgas einlauf in die Nachbrennkammer entspricht.In FIG. 2, the metal layer (?) Is not in its entire area close to contact as a coating of the ceramic surface (4), but rather cambered in such a way that chromium-nickel steel sheet used free space for its thermal expansion finds. The perforation 3 of the metal layer (2) of Figure 1 is in figure 2 replaced by the interior of a tube t20) into which the positive pole (1) protrudes. At the same time, this creates an interior space 21 in which the mixture of exhaust gas / additional air which is subject to heat radiation emanating from the wall 4 in a particularly intense manner. The perforations (5) ensure that there is also a fluctuating gas exchange in space 21 takes place, which corresponds to the quantum exhaust gas inlet into the afterburning chamber.

Figur 3 zeigt die iqetallschicht der Brennrauminnenwandung mit Zwischenräumen, um nicht nur die iglicbkeit der Wärmeausdehnung für das Metall zu geben, sondern darüber hinaus zwischen einem Massepol 1 (oder 2) und einem Pluspol (2 oder 1) nicht nur im Zwischenraum 3 den Funkensprung zu ermöglichen, sondern darüber hinaus Vorfunkenstrecken in den Zwischenräumen 3a und 3b. Werden die Engstellen solcher Zwischenräume weitflächig verteilt, so kann hiermit eine "Verfunkung" grossen Oberflächenbereichs erzielt werden. Figure 3 shows the metal layer of the combustion chamber interior wall with gaps, in order not only to give the metal the iglicbility of thermal expansion, but in addition, between a ground pole 1 (or 2) and a positive pole (2 or 1) not to enable the spark jump only in the gap 3, but also pre-spark gaps in the spaces 3a and 3b. The bottlenecks in such spaces become extensive distributed, a "darkening" of a large surface area can hereby be achieved will.

In Figur 4 ist dieser Gedanke mit zunächst zwei Funkenstrecken (2 zu 1 und 2b zu 1) gesteigert ausgeführt und es sind in jeder Funkenstrecke ausserdem mehrere Vorfunken vorgesehen (von 2b z.S. 15/14, 14/13, 13/10, 10/1). Die Keramik besitzt in diesem Falle eine inselartige Metallbeschichtung bzw. einen entsprechenden Blecbbelag In allen diesen Fällen wird im Betriebszustand Nachbrennerstart aus Kaltzustand die aus den ersten Pulsationen anfallende Wärme einer in ihrer Ntsse kleinen Netallschicht übertragen, welche mehr in den Brenekammerinnensaum abgestrahlt wird, da die Keramik zur Wärmeaufnahme längerer Zeit bedarf. Erst im Zeitablauf, wenn also die Nachbrennerstartphase überwunden ist, kehren sich die Verhältnisse um und eine immer stärkere Wärmestrahlung aus der Keramikmasse setzt sein. In Figure 4, this idea is initially shown with two spark gaps (2nd to 1 and 2b to 1) executed increased and there are also in every spark gap several pre-sparks provided (from 2b e.g. p. 15/14, 14/13, 13/10, 10/1). The ceramics in this case has an island-like metal coating or a corresponding one Sheet metal lining In all of these cases, afterburner start is from cold in the operating state the heat arising from the first pulsations of an essentially small metallic layer which is emitted more into the firing chamber edge than the ceramic takes a longer time to absorb heat. Only in the course of time, i.e. when the afterburner start phase is overcome, the situation is reversed and an ever stronger thermal radiation from the ceramic mass is set.

PateetansDrüche 1. Katalysatorfreie Nachbrennvorrichtungn für Verbrennungsmotoren, dadurch gekennzeichnet, dass die Nachbrennerwandung ganz oder teilweise aus Keramik besteht, welche an der Brennrauminnenseite mit metall beschichtet oder belegt ist. PateetansDrüche 1. Catalyst-free afterburner for internal combustion engines, characterized in that the afterburner wall is made entirely or partially of ceramic consists, which is coated or covered with metal on the inside of the combustion chamber.

Claims (1)

2. Metallische Auskleidung des Innenraumes einer Nachbrennkammer gemäss Anspruch 1 dadurch gekennzeichnet, dass zwischen lAetallschicht und Keramik ein Zwischenraum gebildet wird, in welchem, ermöglicht durch Schlitze oder lochungen, ein ständiger Gaswechsel vor sich geht. 2. Metallic lining of the interior of an afterburning chamber according to claim 1, characterized in that between the metal layer and ceramic a gap is formed in which, made possible by slots or perforations, a constant gas change takes place. 3. Metallische Auskleidung des Innenraumes einer Nachbrennkammer dadurch gekennzeich-3. Metallic lining of the interior of an afterburning chamber thereby marked net, dass die auf der Keramikwandung aufgebrachte Metallschicht in sich zusanmenhanglos ist und aus insel- oder ringartigen Stücken besteht, die Abstand zueinander besitzen.net that the metal layer applied to the ceramic wall in is incoherent and consists of island or ring-like pieces, the distance own each other. 4. metallische Auskleidung einer Brennrauminnenwandung gemäss Anspruch 3 dadurch gekennzeichnet, dass die zusammenhanglosen Teile in die elektrische Leitung eines Zündfunkensystems bekannter Art in der Weise eingefügt sind, dass sich der Zündfunke an de;: Abständen dieser Teile bildet.4. metallic lining of a combustion chamber inner wall according to claim 3 characterized in that the disjointed parts in the electrical line of a known type of spark system are inserted in such a way that the Ignition spark at the distance between these parts. LeerseiteBlank page
DE19722221167 1972-04-29 1972-04-29 AFTERBURNING ROOM WALL Pending DE2221167A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19722221167 DE2221167A1 (en) 1972-04-29 1972-04-29 AFTERBURNING ROOM WALL
IT2236073A IT983630B (en) 1972-04-29 1973-03-30 WALL FOR POST COMBUSTION CHAMBER
DE19772722422 DE2722422A1 (en) 1972-04-29 1977-05-18 Internal combustion engine exhaust system and silencer - uses tubes with multiple bores to cool exhaust gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722221167 DE2221167A1 (en) 1972-04-29 1972-04-29 AFTERBURNING ROOM WALL

Publications (1)

Publication Number Publication Date
DE2221167A1 true DE2221167A1 (en) 1973-11-08

Family

ID=5843666

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722221167 Pending DE2221167A1 (en) 1972-04-29 1972-04-29 AFTERBURNING ROOM WALL

Country Status (2)

Country Link
DE (1) DE2221167A1 (en)
IT (1) IT983630B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909885A1 (en) * 1979-03-14 1980-09-25 Leistritz Hans Karl Two-chamber exhaust afterburner - uses common high energy external ignition in region where flow reverses from first to second chamber
DE2924583A1 (en) * 1979-06-19 1981-01-22 Leistritz Hans Karl Spark ignition device for engine afterburner - provides high ignition temp. and has annular earth electrode and HV electrode rod

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909885A1 (en) * 1979-03-14 1980-09-25 Leistritz Hans Karl Two-chamber exhaust afterburner - uses common high energy external ignition in region where flow reverses from first to second chamber
DE2924583A1 (en) * 1979-06-19 1981-01-22 Leistritz Hans Karl Spark ignition device for engine afterburner - provides high ignition temp. and has annular earth electrode and HV electrode rod

Also Published As

Publication number Publication date
IT983630B (en) 1974-11-11

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