EP0079511A1 - Cylinder head for an internal combustion engine - Google Patents

Cylinder head for an internal combustion engine Download PDF

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Publication number
EP0079511A1
EP0079511A1 EP82110057A EP82110057A EP0079511A1 EP 0079511 A1 EP0079511 A1 EP 0079511A1 EP 82110057 A EP82110057 A EP 82110057A EP 82110057 A EP82110057 A EP 82110057A EP 0079511 A1 EP0079511 A1 EP 0079511A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
insert tube
outlet channel
section
valve seat
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.)
Granted
Application number
EP82110057A
Other languages
German (de)
French (fr)
Other versions
EP0079511B2 (en
EP0079511B1 (en
Inventor
David William Niedert
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.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
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Application filed by Deere and Co filed Critical Deere and Co
Priority to AT82110057T priority Critical patent/ATE12974T1/en
Publication of EP0079511A1 publication Critical patent/EP0079511A1/en
Application granted granted Critical
Publication of EP0079511B1 publication Critical patent/EP0079511B1/en
Publication of EP0079511B2 publication Critical patent/EP0079511B2/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
    • F02F1/4271—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels with an exhaust liner
    • 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
    • F01N13/14—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 having thermal insulation
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/02—Surface coverings of combustion-gas-swept parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
    • F02F2001/4278—Exhaust collectors
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
    • Y10T29/49272—Cylinder, cylinder head or engine valve sleeve making with liner, coating, or sleeve
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49314—Poppet or I.C. engine valve or valve seat making with assembly or composite article making

Definitions

  • the invention relates to a cylinder head of an internal combustion engine, with an exhaust duct running in the cylinder head, the first end of which opens into a cylinder of an engine block to be connected and the second end of which leads into an exhaust manifold to be connected, a valve seat being arranged in the region of the first end of the exhaust duct In the cylinder head formed valve passage is aligned, which opens into the exhaust port, in which an insert tube is arranged, which is located at its first end next to the valve seat, extends with its other end at least to the second end of the exhaust port, with its outer lateral surface together with the Wall of the outlet duct encloses an air space and has a valve passage opening which is aligned with the valve passage.
  • insert tubes In order to prevent the cooling of the exhaust gases flowing from the combustion chamber to an emission control, insert tubes have been used for some time, which are installed in the exhaust duct of an internal combustion engine. It is known that maintaining the highest possible temperature in the exhaust gases increases the efficiency of a turbocharger, one increased catalytic converter or a thermal reactor. This, in turn, improves fuel recovery, reducing the amount of unburned hydrocarbons and carbon monoxide that are blown into the atmosphere.
  • the invention is therefore based on the object of improving the cylinder head of the embodiment described at the outset so that simple and, in particular, mechanical assembly of the insert tube is possible and the air insulation between insert tube and cylinder head is improved.
  • a valve guide is pressed into the valve passage from the outside, which projects through the valve passage opening of the insert tube and receives the stem of a valve interacting with the valve seat. Since, according to the invention, the bent insert tube section now extends over the largest part of the outlet channel, it would not be possible during assembly of the insert tube to insert it with its straight section ahead into the second end of the outlet channel. Because the front end of the insert tube would already hit the wall of the outlet channel after a very short insertion path and jam with further feed.
  • the curved section of the insert tube has approximately the same radius of curvature as the outlet channel, and the outer diameter of the insert tube is smaller than the inner diameter of the outlet channel, a continuous, ring-shaped, air-filled insulating channel results between the outer wall of the insert tube and the wall of the outlet channel. which significantly reduces heat dissipation from the exhaust gases.
  • the straight section of the insert pipe extends beyond the second end of the exhaust duct and thus forms a push-on end for the exhaust manifold to be connected.
  • the insert tube thus protrudes into the connection duct of the exhaust manifold, thus bridging the joint between the cylinder head and the exhaust manifold and thus additionally improving the insulating effect.
  • the connection duct of the exhaust manifold can directly encompass the protruding end of the insert pipe, the exact position of the insert pipe can be fixed within the second end of the outlet duct by attaching the exhaust manifold.
  • an insulating holder On the end of the insert tube protruding from the second end of the exhaust duct, an insulating holder can also be pushed, which is fixed between the cylinder head and the exhaust manifold. It is expediently penetrated by the screws securing the exhaust manifold to the cylinder head. In addition to the additional insulation in the parting line between the cylinder head and the exhaust manifold, with this proposed solution the insulation bracket already ensures the exact alignment of the insert pipe end within the second end of the exhaust duct.
  • annular shoulder is provided for receiving the first end of the insert tube next to the valve seat, which shoulder fits the position of the insert tube in the correct position and ensures that its valve passage opening is aligned with the valve passage.
  • This school ter can advantageously taper conically towards the valve seat, so that the insertion of the front end of the insert tube into the fit is simplified during assembly and can therefore also be carried out mechanically.
  • an inwardly projecting shoulder can be provided in the outlet channel, the inside diameter of which is only slightly larger than the outside diameter of the straight section of the insert tube. This shoulder represents an additional installation lock against incorrect assembly of the insert tube. Because if the insert tube were inserted with its straight section ahead into the second end of the outlet channel, the narrowing caused by the shoulder mentioned would quickly push the front end of the insert tube against ensure the wall of the outlet channel, since the insert tube in the second end of the outlet channel can practically not be tilted at all.
  • Figure 1 shows a detail of a cylinder head 10 of an internal combustion engine, not shown.
  • an exhaust duct 12 In the cylinder head 10, an exhaust duct 12, a cooling duct 14 and a cylindrical valve passage 16 are arranged, which opens into the exhaust duct 12.
  • the latter is curved in an arc shape and has a first end 18 opening with the combustion chamber of an internal combustion engine (not shown) and a second end 20 opening into an exhaust manifold 22 to be connected.
  • the inside diameter of the outlet channel 12 is largely constant over its length with the following exceptions: Immediately next to the first end 18 of the outlet channel 12 there is an annular shoulder 24 which tapers conically towards the end; next to the inner end of the valve passage 16, a step 26 is provided; next to the second end 20 of the outlet channel 12 there is a further annular shoulder 28.
  • valve seat 30 is provided, which is fixed in the cylinder head 10 via a press fit.
  • This valve seat 30 serves as a stop for the first end of an insert tube 32 arranged in the outlet channel 12.
  • the latter consists of a thin stainless steel tube with a wall thickness of approximately one millimeter.
  • This insert tube 32 is composed of a curved section 34 and a straight section 36, the curved section 34 corresponding approximately to the curvature of the outlet channel 12 and extending approximately over 90 °.
  • a valve passage opening 38 is provided in the outer wall of the bent section 34 of the insert tube 32 (see FIG. 2), which is aligned with the valve passage 16 when the insert tube 32 abuts the valve seat 30 with its first end and within the outlet channel 12 its predetermined position occupies.
  • the insert tube 32 is inserted with its bent section 34 first into the second end 20 of the outlet channel 12.
  • the annular shoulder 28 the inside diameter of which is only slightly larger than the outside diameter of the insert tube 32, prevents the insert tube 32 from being inserted with its straight section 36 ahead. Because after the latter had passed the shoulder 28, it would hit the inner wall of the outlet channel 12; tilting or pivoting of the insert tube would be prevented by the shoulder 28.
  • the valve seat 30 When installed correctly, the first end of the insert tube 32 comes into the region of the shoulder 24, which tapers conically towards the valve seat 30 and guides the front end of the bent insert tube section 34 against the surface of the valve seat 30 and holds it there; the valve seat 30 thus forms a stop for the correct installation of the insert tube 32.
  • the valve passage opening 38 of the insert tube 32 is aligned with the valve passage 16 of the cylinder head 10. Both openings cannot escape because the curvature of the insert tube 32 rotates within it prevented in the same way curved outlet channel 12.
  • a valve guide 40 with a bore 42 can then be pressed into the valve passage 16 from above until the lower end 44 of the valve guide projects completely through the valve passage opening 38.
  • the valve guide 40 thus locks the insert tube 32 within the outlet channel 12.
  • the shaft 46 of a valve 48 is slidably guided, which cooperates with the valve seat 30.
  • an insulating bracket 52 can be provided between the cylinder head 10 and the exhaust manifold 22, which is pushed onto the protruding end of the insert tube 32 and is fixed by screws 54 which fix the exhaust manifold 22 to the cylinder head 10.
  • This insulating holder 52 forms the second bearing of the insert tube 32 and ensures that an essentially uniform, annularly shaped air insulating duct 55 is formed between the outer lateral surface of the insert tube 32 and the wall of the outlet duct 12.
  • the insulating holder 52 preferably consists of a stainless steel sheet 56, which is embedded between two heat-resistant elements 58, 60.
  • the annular air duct 55 forms excellent insulation, which reduces the heat loss of the exhaust gases flowing through in accordance with the arrow shown.
  • Figure 1 shows that the smooth, uniformly curved insert tube 32 favors the flow and expansion of the exhaust gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)
  • Soil Working Implements (AREA)

Abstract

An improved port liner and its method of assembly into a cylinder head of an engine such that an air insulating layer is formed between the outer periphery of the liner and the inner diameter of an exhaust passage. The liner is a thin, stainless steel member having an arcuately-shaped section and a straight section which permits it to be inserted only one way into an exhaust passage. This is important for it allows for automated machine assembly of a valve guide which must be pressed through an opening located in the outer surface of the liner. The method of assembly also limits the physical contact between the liner and the cylinder head and this in conjunction with the air layer reduces the loss of thermal energy from the passing exhaust gases.

Description

Die Erfindung betrifft einen Zylinderkopf einer Verbrennungskraftmaschine, mit einem im Zylinderkopf verlaufenden Auslaßkanal, dessen erstes Ende in einen Zylinder eines anzuschließenden Motorblocks und dessen zweites Ende in einen anzuschließenden Auspuffkrümmer münden, wobei im Bereich des ersten Endes des Auslaßkanals ein Ventilsitz angeordnet ist, der mit einem im Zylinderkopf ausgebildeten Ventildurchgang fluchtet, der in den Auslaßkanal mündet, in dem ein Einsatzrohr angeordnet ist, das mit seinem ersten Ende neben dem Ventilsitz liegt, sich mit seinem anderen Ende zumindest bis zum zweiten Ende des Auslaßkanals erstreckt, mit seiner äußeren Mantelfläche gemeinsam mit der Wandung des Auslaßkanals einen Luftraum einschließt und eine Ventildurchtrittsöffnung aufweist, die mit dem Ventildurchgang fluchtet.The invention relates to a cylinder head of an internal combustion engine, with an exhaust duct running in the cylinder head, the first end of which opens into a cylinder of an engine block to be connected and the second end of which leads into an exhaust manifold to be connected, a valve seat being arranged in the region of the first end of the exhaust duct In the cylinder head formed valve passage is aligned, which opens into the exhaust port, in which an insert tube is arranged, which is located at its first end next to the valve seat, extends with its other end at least to the second end of the exhaust port, with its outer lateral surface together with the Wall of the outlet duct encloses an air space and has a valve passage opening which is aligned with the valve passage.

Um die Abkühlung der aus der Verbrennungskammer zu einer Emissionssteuerung strömenden Abgase zu verhindern, werden seit einiger Zeit Einsatzrohre verwendet, die in den Auslaßkanal einer Verbrennungskraftmaschine eingebaut werden. Es ist bekannt, daß die Aufrechterhaltung einer möglichst hohen Temperatur in den Abgasen die Effizienz eines Turboladers, eines katalytischen Konverters oder eines thermischen Reaktors erhöht. Dadurch wird wiederum die Verwertung des Kraftstoffs verbessert, was zu einer Verringerung der Mengen an unverbrannten Kohlenwasserstoffen und Kohlenmonoxid führt, die in die Atmosphäre ausgeblasen werden.In order to prevent the cooling of the exhaust gases flowing from the combustion chamber to an emission control, insert tubes have been used for some time, which are installed in the exhaust duct of an internal combustion engine. It is known that maintaining the highest possible temperature in the exhaust gases increases the efficiency of a turbocharger, one increased catalytic converter or a thermal reactor. This, in turn, improves fuel recovery, reducing the amount of unburned hydrocarbons and carbon monoxide that are blown into the atmosphere.

Mehrere Lösungsvorschläge zur Verringerung des Wärmeverlustes in den Auspuffgasen einer Verbrennungskraftmaschine lassen sich einer Veröffentlichung mit dem Titel "An Analytical Study of Exhaust Gas Heat Loss in a Piston Engine Exhaust Port" entnehmen (Society of Automative Engineers, 18.-22. Oktober 1976, Seiten 1 bis 15). Auf Seite 3 dieser Veröffentlichung ist ein Zylinderkopf der vorstehend erläuterten Bauart beschrieben und in Figur 7 dargestellt. Die hier bereits vorgesehene Luftisolierung zwischen Einsatzrohr und Zylinderkopf verringert den Wärmeabfluß aus den aus der Verbrennungskammer ausströmenden Gasen.Several proposals for reducing heat loss in the exhaust gases of an internal combustion engine can be found in a publication entitled "An Analytical Study of Exhaust Gas Heat Loss in a Piston Engine Exhaust Port" (Society of Automative Engineers, October 18-22, 1976, pages 1 to 15). On page 3 of this publication, a cylinder head of the type described above is described and shown in Figure 7. The air insulation between the insert tube and the cylinder head already provided here reduces the heat flow from the gases flowing out of the combustion chamber.

Ausbildung und Anordnung des Einsatzrohres sind jedoch bei dieser vorbekannten Ausführungsform so kompliziert, daß eine maschinelle Montage der einzelnen Teile nicht möglich ist. Außerdem liegt das Einsatzrohr an mehreren Stellen unmittelbar an der Innenwandung des Auslaßkanals an, so daß an diesen Stellen die Luftisolierschicht unterbrochen ist.Training and arrangement of the insert tube are so complicated in this known embodiment that mechanical assembly of the individual parts is not possible. In addition, the insert tube is in several places directly on the inner wall of the outlet channel, so that the air insulation layer is interrupted at these points.

Der Erfindung liegt somit die Aufgabe zugrunde, den Zylinderkopf der eingangs beschriebenen Ausführungsform so zu verbessern, daß eine einfache und insbesondere maschinelle Montage des Einsatzrohres möglich und die Luftisolierung zwischen Einsatzrohr und Zylinderkopf verbessert werden.The invention is therefore based on the object of improving the cylinder head of the embodiment described at the outset so that simple and, in particular, mechanical assembly of the insert tube is possible and the air insulation between insert tube and cylinder head is improved.

Diese Aufgabe wird erfindungsgemäß durch folgende Merkmale gelöst:

  • a) Der Auslaßkanal ist bogenförmig gekrümmt und weist einen angenähert konstanten Krümmungsradius auf;
  • b) das Einsatzrohr setzt sich aus einem gebogenen Abschnitt und einem geraden Abschnitt zusammen;
  • c) der gebogene Einsatzrohr-Abschnitt beginnt neben dem Ventilsitz und erstreckt sich über den größten Teil des Auslaßkanals mit einem Krümmungsradius, der im wesentlichen dem des Auslaßkanals entspricht;
  • d) der gerade Einsatzrohr-Abschnitt schließt sich an den gebogenen Abschnitt an und erstreckt sich zumindest bis zum zweiten Ende des Auslaßkanals;
  • e) der Außendurchmesser des Einsatzrohres ist kleiner als der Innendurchmesser des Auslaßkanals, so daß beide Bauteile eine weitgehend gleichmäßige Luftisolierschicht einschließen.
This object is achieved according to the invention by the following features:
  • a) The outlet channel is curved in an arc and has an approximately constant radius of curvature;
  • b) the insert tube is composed of a curved section and a straight section;
  • c) the bent insert tube section begins next to the valve seat and extends over most of the outlet duct with a radius of curvature which corresponds essentially to that of the outlet duct;
  • d) the straight insert tube section adjoins the curved section and extends at least to the second end of the outlet channel;
  • e) the outer diameter of the insert tube is smaller than the inner diameter of the outlet channel, so that both components enclose a largely uniform air insulation layer.

üblicherweise wird in den Ventildurchgang von außen eine Ventilführung eingepreßt, die durch die Ventildurchtrittsöffnung des Einsatzrohres hindurch ragt und den Schaft eines mit dem Ventilsitz zusammenwirkenden Ventils aufnimmt. Da sich nun erfindungsgemäß der gebogene Einsatzrohr-Abschnitt über den größten Teil des Auslaßkanals erstreckt, wäre es bei der Montage des Einsatzrohres nicht möglich, dieses mit seinem geraden Abschnitt voran in das zweite Ende des Auslaßkanals einzuführen. Denn das vordere Stirnende des Einsatzrohres würde bereits nach einem sehr kurzen Einsteckweg gegen die Wandung des Auslaßkanals stoßen und bei weiterem Vorschub verklemmen.Usually, a valve guide is pressed into the valve passage from the outside, which projects through the valve passage opening of the insert tube and receives the stem of a valve interacting with the valve seat. Since, according to the invention, the bent insert tube section now extends over the largest part of the outlet channel, it would not be possible during assembly of the insert tube to insert it with its straight section ahead into the second end of the outlet channel. Because the front end of the insert tube would already hit the wall of the outlet channel after a very short insertion path and jam with further feed.

Da der gebogene Abschnitt des Einsatzrohres etwa den gleichen Krümmungsradius aufweist wie der Auslaßkanal, und der Außendurchmesser des Einsatzrohres kleiner ist als der Innendurchmesser des Auslaßkanals, ergibt sich zwischen der Außenwandung des Einsatzrohres und der Wandung des Auslaßkanals ein durchgehender, ringförmiger, mit Luft gefüllter Isolierkanal, der die Wärmeableitung aus den Auspuffgasen wesentlich reduziert.Since the curved section of the insert tube has approximately the same radius of curvature as the outlet channel, and the outer diameter of the insert tube is smaller than the inner diameter of the outlet channel, a continuous, ring-shaped, air-filled insulating channel results between the outer wall of the insert tube and the wall of the outlet channel. which significantly reduces heat dissipation from the exhaust gases.

Infolge der übereinstimmenden Krümmungen zwischen Auslaßkanal und Einsatzrohr kann letzteres gegenüber dem Auslaßkanal auch nicht verdreht bzw. in verdrehter Lage eingeführt werden. Dadurch wird aber sichergestellt, daß nach dem Einbau des Einsatzrohres dessen Ventildurchtrittsöffnung immer sicher mit dem im Zylinderkopf vorgesehenen Ventildurchgang fluchtet, so daß ohne jede Nachjustierung unmittelbar maschinell die genannte Ventilführung eingepreßt werden kann.As a result of the matching curvatures between the outlet channel and insert tube, the latter cannot be rotated or inserted in the rotated position relative to the outlet channel. This ensures, however, that after the installation of the insert tube, its valve passage opening is always securely aligned with the valve passage provided in the cylinder head, so that the valve guide mentioned can be pressed in directly by machine without any readjustment.

Dabei ist es vorteilhaft, wenn sich der gerade Abschnitt des Einsatzrohres bis über das zweite Ende des Auslaßkanals hinaus erstreckt und so ein Aufsteckende für den anzuschließenden Auspuffkrümmer bildet. Das Einsatzrohr ragt somit in den Anschlußkanal des Auspuffkrümmers hinein, überbrückt also die Trennfuge zwischen Zylinderkopf und Auspuffkrümmer und verbessert somit zusätzlich die Isolierwirkung. Da aber der Anschlußkanal des Auspuffkrümmers das überstehende Ende des Einsatzrohres unmittelbar umgreifen kann, läßt sich durch Anbau des Auspuffkrümmers die exakte Lage des Einsatzrohres innerhalb des zweiten Endes des Austrittskanals fixieren.It is advantageous if the straight section of the insert pipe extends beyond the second end of the exhaust duct and thus forms a push-on end for the exhaust manifold to be connected. The insert tube thus protrudes into the connection duct of the exhaust manifold, thus bridging the joint between the cylinder head and the exhaust manifold and thus additionally improving the insulating effect. However, since the connection duct of the exhaust manifold can directly encompass the protruding end of the insert pipe, the exact position of the insert pipe can be fixed within the second end of the outlet duct by attaching the exhaust manifold.

Auf das aus dem zweiten Ende des Auslaßkanals herausragende Ende des Einsatzrohres kann aber zusätzlich noch eine Isolierhalterung geschoben werden, die zwischen Zylinderkopf sowie Auspuffkrümmer festgelegt ist. Zweckmäßig wird sie von den den Auspuffkrümmer am Zylinderkopf befestigenden Schrauben durchdrungen. Neben der zusätzlichen Isolierung in der Trennfuge zwischen Zylinderkopf und Auspuffkrümmer bewirkt bei diesem Lösungsvorschlag bereits die Isolierhalterung die exakte Ausrichtung des Einsatzrohrendes innerhalb des zweiten Endes des Auslaßkanals.On the end of the insert tube protruding from the second end of the exhaust duct, an insulating holder can also be pushed, which is fixed between the cylinder head and the exhaust manifold. It is expediently penetrated by the screws securing the exhaust manifold to the cylinder head. In addition to the additional insulation in the parting line between the cylinder head and the exhaust manifold, with this proposed solution the insulation bracket already ensures the exact alignment of the insert pipe end within the second end of the exhaust duct.

Dabei ist es zweckmäßig, wenn zur Aufnahme des ersten Endes des Einsatzrohres neben dem Ventilsitz eine ringförmige Schulter vorgesehen ist, die einen paßförmigen Sitz zur lagegerechten Anordnung des Einsatzrohres bildet und das Fluchten seiner Ventildurchtrittsöffnung mit dem Ventildurchgang sichert. Diese Schulter kann sich vorteilhaft zum Ventilsitz hin konisch verjüngen, so daß bei der Montage die Einführung des vorderen Endes des Einsatzrohres in den Passungssitz vereinfacht wird und dadurch auch maschinell vorgenommen werden kann.It is expedient if an annular shoulder is provided for receiving the first end of the insert tube next to the valve seat, which shoulder fits the position of the insert tube in the correct position and ensures that its valve passage opening is aligned with the valve passage. This school ter can advantageously taper conically towards the valve seat, so that the insertion of the front end of the insert tube into the fit is simplified during assembly and can therefore also be carried out mechanically.

Im Auslaßkanal kann neben seinem zweiten Ende eine nach innen vorspringende Schulter vorgesehen sein, deren lichter Innendurchmesser nur wenig größer ist als der Außendurchmesser des geraden Abschnitts des Einsatzrohres. Diese Schulter stellt eine zusätzliche Einbausperre gegen eine falsche Montage des Einsatzrohres dar. Denn würde das Einsatzrohr mit seinem geraden Abschnitt voran in das zweite Ende des Auslaßkanals eingeführt werden, so würde die durch die genannte Schulter bedingte Verengung ein schnelles Anstoßen des vorderen Endes des Einsatzrohres gegen die Wandung des Auslaßkanals sicherstellen, da das Einsatzrohr in dem zweiten Ende des Auslaßkanals praktisch überhaupt nicht gekippt werden kann.In addition to its second end, an inwardly projecting shoulder can be provided in the outlet channel, the inside diameter of which is only slightly larger than the outside diameter of the straight section of the insert tube. This shoulder represents an additional installation lock against incorrect assembly of the insert tube. Because if the insert tube were inserted with its straight section ahead into the second end of the outlet channel, the narrowing caused by the shoulder mentioned would quickly push the front end of the insert tube against ensure the wall of the outlet channel, since the insert tube in the second end of the outlet channel can practically not be tilted at all.

In der Zeichnung ist eine als Beispiel dienende Ausführungsform der Erfindung dargestellt. Es zeigen:

  • Figur 1 einen Querschnitt durch einen Zylinderkopf und
  • Figur 2 eine Ansicht eines Einsatzrohres gemäß der Blickrichtung 2 - 2 in Figur 1.
In the drawing, an exemplary embodiment of the invention is shown. Show it:
  • 1 shows a cross section through a cylinder head and
  • FIG. 2 shows a view of an insert tube in the viewing direction 2 - 2 in FIG. 1.

Figur 1 zeigt im Ausschnitt einen Zylinderkopf 10 einer nicht weiter dargestellten Verbrennungskraftmaschine. Im Zylinderkopf 10 sind ein Auslaßkanal 12, ein Kühlkanal 14 sowie ein zylindrischer Ventildurchgang 16 angeordnet, der in den Auslaßkanal 12 mündet. Letzterer ist bogenförmig gekrümmt und weist ein erstes, mit der Verbrennungskammer einer nicht dargestellten Verbrennungskraftmaschine mündendes Ende 18 und ein zweites Ende 20 auf, das in einen anzuschließenden Auspuffkrümmer 22 mündet. Der Innendurchmesser des Auslaßkanals 12 ist über dessen Länge weitgehend konstant mit folgenden Ausnahmen: Unmittelbar neben dem ersten Ende 18 des Auslaßkanals 12 liegt eine sich zum genannten Ende hin konisch verjüngende Ringschulter 24; neben dem inneren Ende des Ventildurchgangs 16 ist eine Stufe 26 vorgesehen; neben dem zweiten Ende 20 des Auslaßkanals 12 befindet sich eine weitere Ringschulter 28.Figure 1 shows a detail of a cylinder head 10 of an internal combustion engine, not shown. In the cylinder head 10, an exhaust duct 12, a cooling duct 14 and a cylindrical valve passage 16 are arranged, which opens into the exhaust duct 12. The latter is curved in an arc shape and has a first end 18 opening with the combustion chamber of an internal combustion engine (not shown) and a second end 20 opening into an exhaust manifold 22 to be connected. The inside diameter of the outlet channel 12 is largely constant over its length with the following exceptions: Immediately next to the first end 18 of the outlet channel 12 there is an annular shoulder 24 which tapers conically towards the end; next to the inner end of the valve passage 16, a step 26 is provided; next to the second end 20 of the outlet channel 12 there is a further annular shoulder 28.

Am ersten Ende 18 des Auslaßkanals 12 ist ein Ventilsitz 30 vorgesehen, der über einen Preßsitz im Zylinderkopf 10 festgelegt ist. Dieser Ventilsitz 30 dient als Anschlag für das erste Ende eines im Auslaßkanal 12 angeordneten Einsatzrohres 32. Letzteres besteht aus einem dünnen rostfreien Stahlrohr mit einer Wandungsstärke von etwa einem Millimeter. Dieses Einsatzrohr 32 setzt sich zusammen aus einem gebogenen Abschnitt 34 und einem geraden Abschnitt 36, wobei der gebogene Abschnitt 34 etwa dem Krümmungsverlauf des Auslaßkanals 12 entspricht und sich etwa über 90° erstreckt.At the first end 18 of the exhaust port 12, a valve seat 30 is provided, which is fixed in the cylinder head 10 via a press fit. This valve seat 30 serves as a stop for the first end of an insert tube 32 arranged in the outlet channel 12. The latter consists of a thin stainless steel tube with a wall thickness of approximately one millimeter. This insert tube 32 is composed of a curved section 34 and a straight section 36, the curved section 34 corresponding approximately to the curvature of the outlet channel 12 and extending approximately over 90 °.

In der äußeren Wandung des gebogenen Abschnitts 34 des Einsatzrohres 32 ist eine Ventildurchtrittsöffnung 38 vorgesehen (siehe Figur 2), die mit dem Ventildurchgang 16 fluchtet, wenn das Einsatzrohr 32 mit seinem ersten Ende gegen den Ventilsitz 30 anliegt und innerhalb des Auslaßkanals 12 seine vorbestimmte Lage einnimmt.A valve passage opening 38 is provided in the outer wall of the bent section 34 of the insert tube 32 (see FIG. 2), which is aligned with the valve passage 16 when the insert tube 32 abuts the valve seat 30 with its first end and within the outlet channel 12 its predetermined position occupies.

Zur Montage wird das Einsatzrohr 32 mit seinem gebogenen Abschnitt 34 voran in das zweite Ende 20 des Auslaßkanals 12 eingeschoben. Die Ringschulter 28, deren Innendurchmesser nur geringfügig größer ist als der Außendurchmesser des Einsatzrohres 32, verhindert ein Einschieben des Einsatzrohres 32 mit seinem geraden Abschnitt 36 voran. Denn nachdem letzterer die Schulter 28 passiert hätte, würde er gegen die Innenwandung des Auslaßkanals 12 stoßen; ein Kippen bzw. Verschwenken des Einsatzrohres würde aber durch die Schulter 28 verhindert werden.For assembly, the insert tube 32 is inserted with its bent section 34 first into the second end 20 of the outlet channel 12. The annular shoulder 28, the inside diameter of which is only slightly larger than the outside diameter of the insert tube 32, prevents the insert tube 32 from being inserted with its straight section 36 ahead. Because after the latter had passed the shoulder 28, it would hit the inner wall of the outlet channel 12; tilting or pivoting of the insert tube would be prevented by the shoulder 28.

Bei seitenrichtiger Montage gelangt das erste Ende des Einsatzrohres 32 in den Bereich der sich zum Ventilsitz 30 hin konisch verjüngenden Schulter 24, die das vordere Ende des gebogenen Einsatzrohr-Abschnittes 34 gegen die Oberfläche des Ventilsitzes 30 führt und dort festhält; der Ventilsitz 30 bildet also einen Anschlag für die lagegerechte Montage des Einsatzrohres 32. In dieser Position fluchtet die Ventildurchtrittsöffnung 38 des Einsatzrohres 32 mit dem Ventildurchgang 16 des Zylinderkopfes 10. Beide öffnungen können nicht außer Flucht kommen, da die Krümmung des Einsatzrohres 32 seine Drehung innerhalb des in gleicher Weise gekrümmten Auslaßkanals 12 verhindert.When installed correctly, the first end of the insert tube 32 comes into the region of the shoulder 24, which tapers conically towards the valve seat 30 and guides the front end of the bent insert tube section 34 against the surface of the valve seat 30 and holds it there; the valve seat 30 thus forms a stop for the correct installation of the insert tube 32. In this position, the valve passage opening 38 of the insert tube 32 is aligned with the valve passage 16 of the cylinder head 10. Both openings cannot escape because the curvature of the insert tube 32 rotates within it prevented in the same way curved outlet channel 12.

Anschließend kann nunmehr eine Ventilführung 40 mit einer Bohrung 42 von oben in den Ventildurchgang 16 eingepreßt werden, bis das untere Ende 44 der Ventilführung vollständig durch die Ventildurchtrittsöffnung 38 ragt. Die Ventilführung 40 arretiert somit das Einsatzrohr 32 innerhalb des Auslaßkanals 12. In der genannten Bohrung 42 ist der Schaft 46 eines Ventils 48 verschiebbar geführt, das mit dem Ventilsitz 30 zusammenwirkt. Bei geöffnetem Ventil 48 strömen die Abgase aus der Verbrennungskammer der Maschine mit einer Temperatur von 600° bis 700° C durch das Einsatzrohr 32 zum Auspuffkrümmer 22.A valve guide 40 with a bore 42 can then be pressed into the valve passage 16 from above until the lower end 44 of the valve guide projects completely through the valve passage opening 38. The valve guide 40 thus locks the insert tube 32 within the outlet channel 12. In the Bore 42 called the shaft 46 of a valve 48 is slidably guided, which cooperates with the valve seat 30. When the valve 48 is open, the exhaust gases flow from the combustion chamber of the engine at a temperature of 600 ° to 700 ° C. through the insert pipe 32 to the exhaust manifold 22.

Während das erste Ende des Einsatzrohres 32 auf dem Ventilsitz 30 aufsitzt, ragt der gerade Abschnitt 36 etwas über das zweite Ende 20 des Auslaßkanals 12 hinaus in einen Anschlußkanal 50 des Auspuffkrümmers 22 hinein. Dadurch kann zwischen Zylinderkopf 10 und Auspuffkrümmer 22 eine Isolierhalterung 52 vorgesehen werden, die auf das herausragende Ende des Einsatzrohres 32 aufgeschoben ist und durch Schrauben 54 festgelegt wird, die den Auspuffkrümmer 22 am Zylinderkopf 10 festlegen. Diese Isolierhalterung 52 bildet die zweite Lagerung des Einsatzrohres 32 und stellt sicher, daß zwischen der äußeren Mantelfläche des Einsatzrohres 32 und der Wandung des Auslaßkanals 12 ein im wesentlichen gleichförmiger, ringförmig ausgebildeter Luftisolierkanal 55 gebildet wird.While the first end of the insert tube 32 is seated on the valve seat 30, the straight section 36 protrudes somewhat beyond the second end 20 of the outlet duct 12 into a connection duct 50 of the exhaust manifold 22. As a result, an insulating bracket 52 can be provided between the cylinder head 10 and the exhaust manifold 22, which is pushed onto the protruding end of the insert tube 32 and is fixed by screws 54 which fix the exhaust manifold 22 to the cylinder head 10. This insulating holder 52 forms the second bearing of the insert tube 32 and ensures that an essentially uniform, annularly shaped air insulating duct 55 is formed between the outer lateral surface of the insert tube 32 and the wall of the outlet duct 12.

Die Isolierhalterung 52 besteht vorzugsweise aus einem rostfreien Stahlblech 56, das zwischen zwei hitzebeständigen Elementen 58,60 eingebettet ist. Bei der in Figur 1 dargestellten Anordnung bildet der ringförmige Luftkanal 55 eine hervorragende Isolierung, die den Wärmeverlust der entsprechend dem eingezeichneten Pfeil durchströmenden.Abgase reduziert.The insulating holder 52 preferably consists of a stainless steel sheet 56, which is embedded between two heat-resistant elements 58, 60. In the arrangement shown in FIG. 1, the annular air duct 55 forms excellent insulation, which reduces the heat loss of the exhaust gases flowing through in accordance with the arrow shown.

Figur 1 läßt erkennen, daß das glatte, gleichmäßig gekrümmte Einsatzrohr 32 die Strömung sowie die Expansion der Abgase begünstigt. Durch Minimierung der Metallkontakte zwischen Einsatzrohr 32 und dem gegossenen Zylinderkopf 10 sowie durch Bildung einer sich nahezu über die komplette Länge des Einsatzrohres 32 erstreckenden, ringförmigen Luftisolierschicht 55, bleibt die thermische Energie in den Auspuffgasen weitgehend erhalten. Die durch die Luftisolierschicht 55 abströmende Wärme wird vom Zylinderkopf 10 auf ein Kühlmittel, z.B. Wasser, übertragen, das durch den Kühlkanal 14 strömt.Figure 1 shows that the smooth, uniformly curved insert tube 32 favors the flow and expansion of the exhaust gases. By minimizing the metal contacts between the insert pipe 32 and the cast cylinder head 10 and by forming an annular air insulation layer 55 which extends almost over the entire length of the insert pipe 32, the thermal energy in the exhaust gases is largely retained. The Heat flowing out through the air insulating layer 55 is transferred from the cylinder head 10 to a coolant, for example water, which flows through the cooling channel 14.

Die Erfindung wurde vorstehend zwar anhand eines im Auslaßkanal angeordneten Einsatzrohres erläutert, jedoch könnte ein derartiges Einsatzrohr auch im Einlaßkanal einer Verbrennungskraftmaschine Verwendung finden.Although the invention was explained above with reference to an insert pipe arranged in the outlet duct, such an insert pipe could also be used in the inlet duct of an internal combustion engine.

Claims (7)

1. Zylinderkopf (10) einer Verbrennungskraftmaschine, mit einem im Zylinderkopf verlaufenden Auslaßkanal (12), dessen erstes Ende (18) in einen Zylinder eines anzuschließenden Motorblocks und dessen zweites Ende (20) in einen anzuschließenden Auspuffkrümmer (22) münden, wobei im Bereich des ersten Endes (18) des Auslaßkanals (12) ein Ventilsitz (30) angeordnet ist, der mit einem im Zylinderkopf (10) ausgebildeten Ventildurchgang (16) fluchtet, der in den Auslaßkanal (12) mündet, in dem ein Einsatzrohr (32) angeordnet ist, das mit seinem ersten Ende neben dem Ventilsitz (30) liegt, sich mit seinem anderen Ende zumindest bis zum zweiten Ende (20) des Auslaßkanals (12) erstreckt, mit seiner äußeren Mantelfläche gemeinsam mit der Wandung des Auslaßkanals (12) einen Luftraum einschließt und eine Ventildurchtrittsöffnung (38) aufweist, die mit dem Ventildurchgang (16) fluchtet;
gekennzeichnet durch folgende Merkmale: a) Der Auslaßkanal (12) ist bogenförmig gekrümmt und weist einen angenähert konstanten Krümmungsradius auf; b) das Einsatzrohr (32) setzt sich aus einem gebogenen Abschnitt (34) und einem geraden Abschnitt (36) zusammen; c) der gebogene Einsatzrohr-Abschnitt (34) beginnt neben dem Ventilsitz (30) und erstreckt sich über den größten Teil des Auslaßkanals (12) mit einem Krümmungsradius, der im wesentlichen dem des Auslaßkanals (12) entspricht; d) der gerade Einsatzrohr-Abschnitt (36) schließt sich an den gebogenen Abschnitt (34) an und erstreckt sich zumindest bis zum zweiten Ende (20) des Auslaßkanals (12); e) der Außendurchmesser des Einsatzrohres (32) ist kleiner als der Innendurchmesser des Auslaßkanals (12), so daß beide Bauteile (12,32) eine weitgehend gleichmäßige Luftisolierschicht einschließen. 1. Cylinder head (10) of an internal combustion engine, with an outlet channel (12) running in the cylinder head, the first end (18) of which is connected to an engine block to be connected and the second end (20) of which is connected to an exhaust manifold (22) to be connected, whereby in the area A valve seat (30) is arranged at the first end (18) of the outlet channel (12) and is aligned with a valve passage (16) formed in the cylinder head (10), which opens into the outlet channel (12), in which an insert tube (32) is arranged, which is located at its first end next to the valve seat (30), extends with its other end at least to the second end (20) of the outlet channel (12), with its outer lateral surface together with the wall of the outlet channel (12) one Includes air space and has a valve passage opening (38) which is aligned with the valve passage (16);
characterized by the following features: a) The outlet channel (12) is curved in an arc and has an approximately constant radius of curvature; b) the insert tube (32) is composed of a bent section (34) and a straight section (36); c) the bent insert tube section (34) begins next to the valve seat (30) and extends over most of the outlet channel (12) with a radius of curvature which corresponds essentially to that of the outlet channel (12); d) the straight insert tube section (36) adjoins the bent section (34) and extends at least to the second end (20) of the outlet channel (12); e) the outer diameter of the insert tube (32) is smaller than the inner diameter of the outlet channel (12), so that both components (12, 32) enclose a largely uniform air insulation layer. 2. Zylinderkopf nach Anspruch 1, dadurch gekennzeichnet, daß sich der gerade Abschnitt (36) des Einsatzrohres (32) bis über das zweite Ende (20) des Auslaßkanals (12) hinaus erstreckt und so ein Aufsteckende für den anzuschließenden Auspuffkrümmer (22) bildet.2. Cylinder head according to claim 1, characterized in that the straight section (36) of the insert tube (32) extends beyond the second end (20) of the exhaust port (12) and thus forms a push-on end for the exhaust manifold (22) to be connected . 3. Zylinderkopf nach Anspruch 2, dadurch gekennzeichnet, daß auf das aus dem zweiten Ende (20) des Auslaßkanals (12) herausragende Ende des Einsatzrohres (32) eine Isolierhalterung (52) geschoben ist, die zwischen Zylinderkopf (10) sowie Auspuffkrümmer (22) festgelegt ist.3. Cylinder head according to claim 2, characterized in that on the from the second end (20) of the exhaust port (12) projecting end of the insert tube (32) an insulating bracket (52) is pushed between the cylinder head (10) and exhaust manifold (22nd ) is set. 4. Zylinderkopf nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß zur Aufnahme des ersten Endes des Einsatzrohres (32) neben dem Ventilsitz (30) eine ringförmige Schulter (24) vor; gesehen ist, die einen paßförmigen Sitz zur lagegerechten Anordnung des Einsatzrohres (32) bildet und das Fluchten seiner Ventildurchtrittsöffnung (38) mit dem Ventildurchgang (16) sichert.4. Cylinder head according to claim 1, 2 or 3, characterized in that for receiving the first end of the insert tube (32) next to the valve seat (30) an annular shoulder (24) in front; is seen, which forms a fit for the correct arrangement of the insert tube (32) and ensures the alignment of its valve passage opening (38) with the valve passage (16). 5. Zylinderkopf nach Anspruch 4, dadurch gekennzeichnet, daß sich die Schulter (24) zum Ventilsitz (30) hin konisch verjüngt.5. Cylinder head according to claim 4, characterized in that the shoulder (24) tapers conically towards the valve seat (30). 6. Zylinderkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich der gebogene Abschnitt (34) des Einsatzrohres (32) über etwa 90° erstreckt.6. Cylinder head according to one of the preceding claims, characterized in that the bent section (34) of the insert tube (32) extends over approximately 90 °. 7. Zylinderkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Auslaßkanal (12) neben seinem zweiten Ende (20) eine nach innen vorspringende Schulter (28) vorgesehen ist, deren lichter Innendurchmesser nur wenig größer ist als der Außendurchmesser des geraden Abschnitts (36) des Einsatzrohres (32).7. Cylinder head according to one of the preceding claims, characterized in that in the exhaust port (12) next to its second end (20) an inwardly projecting shoulder (28) is provided, the inside diameter of which is only slightly larger than the outside diameter of the straight section ( 36) of the insert tube (32).
EP82110057A 1981-11-13 1982-10-30 Cylinder head for an internal combustion engine Expired EP0079511B2 (en)

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AT82110057T ATE12974T1 (en) 1981-11-13 1982-10-30 CYLINDER HEAD OF AN INTERNAL ENGINE.

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US06/321,141 US4430856A (en) 1981-11-13 1981-11-13 Port liner and method of assembly
US321141 1981-11-13

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EP0079511A1 true EP0079511A1 (en) 1983-05-25
EP0079511B1 EP0079511B1 (en) 1985-04-24
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JP (1) JPS5891349A (en)
AT (1) ATE12974T1 (en)
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FR2348370A1 (en) * 1976-04-13 1977-11-10 Fuji Heavy Ind Ltd THERMAL REACTION DEVICE FOR INTERNAL COMBUSTION ENGINE
US4197704A (en) * 1976-06-11 1980-04-15 Honda Giken Kogyo Kabushiki Kaisha Exhaust manifold for internal combustion engine

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EP0232953A1 (en) * 1986-02-10 1987-08-19 General Motors Corporation Low-stress shielded exhaust passage assemblies
WO1989005911A1 (en) * 1987-12-23 1989-06-29 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gm Hot-gas pipe for an internal combustion engine
US5022227A (en) * 1987-12-23 1991-06-11 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Pipe carrying hot gases for an internal-combustion engine
FR2714112A1 (en) * 1993-12-22 1995-06-23 Caterpillar Inc Liner and exhaust port gasket structure.

Also Published As

Publication number Publication date
ATE12974T1 (en) 1985-05-15
EP0079511B2 (en) 1987-10-14
DE3263294D1 (en) 1985-05-30
EP0079511B1 (en) 1985-04-24
ES8400795A1 (en) 1983-11-01
ZA828295B (en) 1984-06-27
BR8206426A (en) 1983-09-27
ES517313A0 (en) 1983-11-01
CA1201341A (en) 1986-03-04
MX157962A (en) 1988-12-28
AU8920182A (en) 1983-05-19
AU550495B2 (en) 1986-03-20
JPH042791B2 (en) 1992-01-20
US4430856A (en) 1984-02-14
JPS5891349A (en) 1983-05-31

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