EP0079511B2 - Cylinder head for an internal combustion engine - Google Patents

Cylinder head for an internal combustion engine Download PDF

Info

Publication number
EP0079511B2
EP0079511B2 EP82110057A EP82110057A EP0079511B2 EP 0079511 B2 EP0079511 B2 EP 0079511B2 EP 82110057 A EP82110057 A EP 82110057A EP 82110057 A EP82110057 A EP 82110057A EP 0079511 B2 EP0079511 B2 EP 0079511B2
Authority
EP
European Patent Office
Prior art keywords
exhaust passage
liner
cylinder head
exhaust
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82110057A
Other languages
German (de)
French (fr)
Other versions
EP0079511B1 (en
EP0079511A1 (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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23249353&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0079511(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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
Publication of EP0079511B1 publication Critical patent/EP0079511B1/en
Application granted granted Critical
Publication of EP0079511B2 publication Critical patent/EP0079511B2/en
Expired legal-status Critical Current

Links

Images

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 port extending in the cylinder head, which is curved in an arc shape, has an at least approximately constant radius of curvature and with its first end in a cylinder of an engine block to be connected and with its second end in an exhaust manifold to be connected, in which In the region of the first end of the exhaust duct, a valve seat is arranged, which is aligned with a valve passage formed in the cylinder head, which opens into the exhaust duct, into which an insert tube is inserted, which has its first end next to the valve seat, from here via a bent insert tube Section extends over most of the outlet duct with a radius of curvature substantially corresponding to the radius of curvature of the outlet duct and with a smaller outer diameter compared to the inner diameter of the outlet duct, with its other end at least until extends to the second end of the outlet channel, encloses with its outer surface together with the wall of the outlet channel a largely uniform air insulation layer and has
  • 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, a 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 bent insert pipe section extends from the valve seat to the second end of the outlet channel and then merges into a flange of larger diameter, which is provided with through-holes through which bolts for fastening the exhaust manifold are guided. This screw connection fixes the insert tube which can subsequently be inserted into the outlet duct.
  • the flange molded onto the insert tube in the embodiment described above is disadvantageous: heat is drawn off from the curved region of the insert tube into the flange region, which arrangement acts like a cooling plate.
  • heat is drawn off from the curved region of the insert tube into the flange region, which arrangement acts like a cooling plate.
  • special insulation must be provided on both sides of the flange. This increases costs and complicates assembly.
  • the production of insert tubes with a molded flange is relatively complex.
  • the invention has for its object to improve the cylinder head of the embodiment described above so that the heat loss in the exhaust gases is reduced, but nevertheless a simple and in particular mechanical assembly of the insert tube is possible.
  • bent insert tube section is followed by a straight insert tube section which extends at least to the second end of the outlet channel and has an outside diameter which is smaller than the inside diameter of the outlet duct.
  • 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 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 pipe 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 grip the projecting end of the insert pipe, the exact position of the insert pipe can be fixed within the second end of the exhaust 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.
  • the insulating 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 forms a fit for the correct arrangement of the insert tube and ensures the alignment of its valve passage opening with the valve passage.
  • This shoulder 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.
  • FIG. 1 shows a detail of a cylinder head 10 of a combustion crane machine, 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 into 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 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 against 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 duct 12; tilting or pivoting of the insert tube would be prevented by the shoulder 28.
  • the first end of the insert tube 32 comes into the area of the to the valve seat 30 tapered shoulder 24, which leads the front end of the bent insert tube section 34 against the surface of the valve seat 30 and holds there; the valve seat 30 thus forms a stop for the correct installation of the insert tube 32. In this position, the
  • 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 stem 46 of a valve 48, which cooperates with the valve seat 30, is displaceably guided in the bore 42 mentioned.
  • the valve 48 When the valve 48 is open, the exhaust gases flow from the combustion chamber of the machine at a temperature of 600 ° to 700 ° C. through the insert pipe 32 to the exhaust manifold 22.
  • 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 channel 55 is formed between the outer lateral surface of the insert tube 32 and the wall of the outlet channel 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 channel 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.
  • a coolant e.g. B. water

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)
  • Soil Working Implements (AREA)
  • Exhaust Silencers (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,der bogenförmig gekrümmt ist, einen zumindest angenähert konstanten Krümmungsradius aufweist und mit seinem ersten Ende in einem Zylinder eines anzuschließenden Motorblocks und mit seinem zweiten Ende in einen anzuschließenden Auspuffkrümmer mündet, 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 den ein Einsatzrohr eingeschoben ist, das mit seinem ersten Ende neben dem Ventilsitz liegt, sich von hier über einen gebogenen Einsatzrohr-Abschnitt über den größten Teil des Auslaßkanals mit einem dem genannten Krümmungsradius des Auslaßkanals im wesentlichen entsprechenden Krümmungsradius und mit einem im Vergleich zum Innendurchmesser des Auslaßkanals kleineren Außendurchmesser erstreckt, sich mit seinem anderen Ende zumindest bis zum zweiten Ende des Auslaßkanals erstreckt, mit seiner äußeren Mantelfläche gemeinsam mit der Wandung des Auslaßkanals eine weitgehend gleichmäßige Luftisolierschicht 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 port extending in the cylinder head, which is curved in an arc shape, has an at least approximately constant radius of curvature and with its first end in a cylinder of an engine block to be connected and with its second end in an exhaust manifold to be connected, in which In the region of the first end of the exhaust duct, a valve seat is arranged, which is aligned with a valve passage formed in the cylinder head, which opens into the exhaust duct, into which an insert tube is inserted, which has its first end next to the valve seat, from here via a bent insert tube Section extends over most of the outlet duct with a radius of curvature substantially corresponding to the radius of curvature of the outlet duct and with a smaller outer diameter compared to the inner diameter of the outlet duct, with its other end at least until extends to the second end of the outlet channel, encloses with its outer surface together with the wall of the outlet channel a largely uniform air insulation layer and has a valve passage opening which is aligned with the valve passage.

Um die Abkühlung der aus der Verbrennungskammer zu einer Abgasreinigungsvorrichtung 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 exhaust gas cleaning device, 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, a 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.

Der eingangs beschriebene Zylinderkopf läßt sich der US-A-2 260 656 entnehmen. Hier erstreckt sich der gebogene Einsatzrohr-Abschnitt vom Ventilsitz bis zum zweiten Ende des Auslaßkanals und geht dann in einen Flansch größeren Durchmessers über, der mit Durchgangsbohrungen versehen ist, durch die Bolzen zur Befestigung des Auspuffkrümmers geführt sind. Durch diese Verschraubung wird das nachträglich in den Auslaßkanal einschiebbare Einsatzrohr in seiner Lage fixiert.The cylinder head described above can be found in US-A-2 260 656. Here, the bent insert pipe section extends from the valve seat to the second end of the outlet channel and then merges into a flange of larger diameter, which is provided with through-holes through which bolts for fastening the exhaust manifold are guided. This screw connection fixes the insert tube which can subsequently be inserted into the outlet duct.

Der bei der vorstehend beschriebenen Ausführungsform an das Einsatzrohr angeformte Flansch ist nachteilig: Aus dem gekrümmten Bereich des Einsatzrohres wird Wärme in den Flanschbereich abgezogen, der durch seine Anordnung wie ein Kühlblech wirkt. Um den Wärmeübergang zwischen diesem Flansch und dem Zylinderkopf sowie dem Auslaßkanal zu verringern, muß auf beiden Seiten des Flansches eine spezielle Isolierung vorgesehen werden. Dies erhöht die Kosten und kompliziert die Montage. Außerdem ist die Herstellung von Einsatzrohren mit angeformtem Flansch verhältnismäßig aufwendig.The flange molded onto the insert tube in the embodiment described above is disadvantageous: heat is drawn off from the curved region of the insert tube into the flange region, which arrangement acts like a cooling plate. In order to reduce the heat transfer between this flange and the cylinder head and the exhaust port, special insulation must be provided on both sides of the flange. This increases costs and complicates assembly. In addition, the production of insert tubes with a molded flange is relatively complex.

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 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 die Aufgabe zugrunde, den Zylinderkopf der eingangs beschriebenen Ausführungsform so zu verbessern, daß der Wärmeverlust in den Auspuffgasen verringert, dennoch aber eine einfache und insbesondere maschinelle Montage des Einsatzrohres möglich wird.The invention has for its object to improve the cylinder head of the embodiment described above so that the heat loss in the exhaust gases is reduced, but nevertheless a simple and in particular mechanical assembly of the insert tube is possible.

Diese Aufgabe wird in Verbindung mit den eingangs beschriebenen Merkmalen erfindungsgemäß dadurch gelöst, daß sich an den gebogenen Einsatzrohr-Abschnitt ein gerader Einsatzrohr-Abschnitt anschließt, der sich zumindest bis zum zweiten Ende des Auslaßkanals erstreckt und einen Außendurchmesser aufweist, der kleiner ist als der Innendurchmesser des Auslaßkanals.This object is achieved in connection with the features described at the outset in that the bent insert tube section is followed by a straight insert tube section which extends at least to the second end of the outlet channel and has an outside diameter which is smaller than the inside diameter of the outlet duct.

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.

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 the insert tube the latter also not twisted relative to the outlet channel or introduced in a twisted position. This ensures, however, that after 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 Ausfrittskanals 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 pipe 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 grip the projecting end of the insert pipe, the exact position of the insert pipe can be fixed within the second end of the exhaust 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 insulating 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 useful if an annular shoulder is provided for receiving the first end of the insert tube next to the valve seat, which shoulder forms a fit for the correct arrangement of the insert tube and ensures the alignment of its valve passage opening with the valve passage. This shoulder 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 großer 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 so 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 elne 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 according to viewing direction 2-2 in FIG. 1.

Figur 1 zeigt im Ausschnitt einen Zylinderkopf 10 einer nicht weiter dargestellten Verbrennungskranmaschine. 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, in die Verbrennungskammer einer nicht dargestellten Verbrennungskraftmaschlne 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 a combustion crane machine, 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 into 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 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 against 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 duct 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 dieWhen installed correctly, the first end of the insert tube 32 comes into the area of the to the valve seat 30 tapered shoulder 24, which leads the front end of the bent insert tube section 34 against the surface of the valve seat 30 and holds there; the valve seat 30 thus forms a stop for the correct installation of the insert tube 32. In this position, the

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.Valve passage opening 38 of the insert tube 32 with the valve passage 16 of the cylinder head 10. Both openings cannot be out of alignment, since the curvature of the insert tube 32 prevents its rotation within the outlet duct 12 which is curved in the same way.

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 vershiebbar 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. The stem 46 of a valve 48, which cooperates with the valve seat 30, is displaceably guided in the bore 42 mentioned. When the valve 48 is open, the exhaust gases flow from the combustion chamber of the machine 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 channel 55 is formed between the outer lateral surface of the insert tube 32 and the wall of the outlet channel 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 channel 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 that 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, e.g. B. water, which flows through the cooling channel 14.

Claims (7)

1. Cylinder head (10) for an internal combustion engine, having an exhaust passage (12) formed therein, said exhaust passage (12) being of arcuate shape with an at least substantially constant radius of curvature, the first end (18) of said exhaust passage communicating with a cylinder in an attachable engine bloc and its second end (20) communicating with an attachable exhaust manifold (22), a valve seat (30) located in the area of said first end (18) of said exhaust passage (12) and aligned with a valve passageway (16) formed in said cylinder head (10) and intersecting said exhaust passage (12), and a liner (32) positioned in said exhaust passage (12) and extending from a first end adjacent said valve seat (30) via an arcuately-shaped section (34) through a major portion of said exhaust passage (12) with a radius of curvature substantially equal to said radius of curvature of the exhause passage (12) and with an outside diameter which is smaller than the inner diameter of said exhaust passage (12), said liner extending with its second end at least to the second end (20) of said exhaust passage (12) and forming a relatively uniform air insolating layer between its outer surface and the wall of said exhaust passage (12), said liner being provided with a valve opening (38) in alignment with said valve passageway (16), characterized in that a straight liner-section (36) extending from the arcuately-shaped liner-section (34) at least to the second end (20) of the exhaust passage (12) and having an outside diameter which is smaller than the inner diameter of the exhaust passage (12).
2. Cylinder head of claim 1, wherein said straight section (36) of said liner (32) extends outward beyond said second end (22) of said exhaust passage (12) forming an inserter for said attachable exhaust manifold (22).
3. Cylinder head of claim 2, wherein insulated support members (52) are slided on said end of said liner (32) extending outward beyond said second end (20) of said exhaust passage (12) and being fixed between cylinder head (10) and exhaust manifold (22).
4. Cylinder head of claim 1, 2 or 3 wherein for receiving the first end of said liner (32) an annular shoulder (28) is formed adjacent said valve seat (30), said shoulder forming a precise fitting for the correct arrangement of said liner (32) and insuring alignment between its valve opening (38) and said valve passageway (16).
5. Cylinder head of claim 4 wherein said shoulder (24) is tapered in the direction of said valve seat (30).
6. Cylinder head of one the preceding claims wherein said arcuately-shaped section (34) of said liner (32) extends over approximately 90 degrees.
7. Cylinder head of one of the preceding claims wherein in said exhaust passage (12) adjacent its second end (20) a shoulder (28) is positioned which protrudes to the interior and has an inner diameter which is only slightly larger than the outer diameter of the straight section (36) of said liner (32).
EP82110057A 1981-11-13 1982-10-30 Cylinder head for an internal combustion engine Expired EP0079511B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110057T ATE12974T1 (en) 1981-11-13 1982-10-30 CYLINDER HEAD OF AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/321,141 US4430856A (en) 1981-11-13 1981-11-13 Port liner and method of assembly
US321141 1981-11-13

Publications (3)

Publication Number Publication Date
EP0079511A1 EP0079511A1 (en) 1983-05-25
EP0079511B1 EP0079511B1 (en) 1985-04-24
EP0079511B2 true EP0079511B2 (en) 1987-10-14

Family

ID=23249353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110057A Expired EP0079511B2 (en) 1981-11-13 1982-10-30 Cylinder head for an internal combustion engine

Country Status (11)

Country Link
US (1) US4430856A (en)
EP (1) EP0079511B2 (en)
JP (1) JPS5891349A (en)
AT (1) ATE12974T1 (en)
AU (1) AU550495B2 (en)
BR (1) BR8206426A (en)
CA (1) CA1201341A (en)
DE (1) DE3263294D1 (en)
ES (1) ES517313A0 (en)
MX (1) MX157962A (en)
ZA (1) ZA828295B (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644747A (en) * 1986-02-10 1987-02-24 General Motors Corporation Low-stress shielded exhaust passage assemblies
DE3743851C1 (en) * 1987-12-23 1989-05-03 Mtu Friedrichshafen Gmbh Exhaust pipe for an internal combustion engine
US5150572A (en) * 1991-02-21 1992-09-29 Cummins Engine Company, Inc. Insulated exhaust port liner
SE9200871L (en) * 1991-05-01 1992-11-02 Outboard Marine Corp PROCEDURE AND DEVICE FOR THE PREPARATION OF SUPPLY DEVICE SHOWING PLACE IN PLACE USING A PRECISION MOLDING PROCESS
US5239956A (en) * 1991-06-07 1993-08-31 Detroit Diesel Corporation Internal combustion engine cylinder heads and similar articles of manufacture and methods of manufacturing same
US5414993A (en) * 1993-12-22 1995-05-16 Caterpillar Inc. Exhaust port liner and seal assembly
JP2001132444A (en) * 1999-11-04 2001-05-15 Honda Motor Co Ltd Exhaust port structure of internal combustion engine
DE10017968C1 (en) * 2000-04-11 2001-07-05 Daimler Chrysler Ag Cylinder head of internal combustion engine comprises cast part and at least one outlet channel of thin-walled material, through which together with cylinder head cast part ring chamber partly filled with mould sand is formed
DE10130408A1 (en) * 2001-06-23 2003-01-02 Daimler Chrysler Ag Cylinder head of an internal combustion engine
DE10231378A1 (en) * 2002-07-11 2004-01-22 Daimlerchrysler Ag Cylinder head of an internal combustion engine
US6817334B2 (en) * 2002-11-22 2004-11-16 Caterpillar Inc Intake port sleeve for an internal combustion engine
NZ526361A (en) * 2003-05-30 2006-02-24 Fisher & Paykel Appliances Ltd Compressor improvements
US20060083609A1 (en) * 2004-10-14 2006-04-20 Augspurger Murray D Fluid cooled marine turbine housing
US7305763B2 (en) * 2005-07-26 2007-12-11 Board Of Trustees Of Michigan State University Hydroformed port liner
WO2008127684A2 (en) * 2007-04-13 2008-10-23 Metaldyne Company Llc Cylinder head
JP5218497B2 (en) * 2009-12-04 2013-06-26 株式会社デンソー Semiconductor device and manufacturing method thereof
US8683973B2 (en) 2010-10-12 2014-04-01 Briggs & Stratton Corporation Intake runner for an internal combustion engine
JP5211184B2 (en) * 2011-02-08 2013-06-12 株式会社日本自動車部品総合研究所 Exhaust cooling adapter
US9121370B2 (en) 2011-11-15 2015-09-01 Denso Corporation Combustion system
JP5621752B2 (en) * 2011-11-15 2014-11-12 株式会社デンソー Combustion system
JP7040977B2 (en) * 2018-03-29 2022-03-23 本田技研工業株式会社 Intake port structure
CN109184936A (en) * 2018-10-29 2019-01-11 天津中恒动力研究院有限公司 exhaust structure and engine
AT522795B1 (en) * 2019-10-07 2021-02-15 Avl List Gmbh CYLINDER HEAD OF AN COMBUSTION ENGINE
US11486293B2 (en) * 2020-08-28 2022-11-01 Honda Motor Co., Ltd. Exhaust structure of internal combustion engine
CN112610321A (en) * 2020-12-09 2021-04-06 一汽解放汽车有限公司 Engine exhaust passage heat insulation device and vehicle

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260656A (en) * 1940-02-27 1941-10-28 Kenyon F Lee Exhaust port liner
GB873135A (en) * 1956-08-01 1961-07-19 Marc Marie Paul Rene De La Fou Improvements in or relating to engine exhaust systems
GB1151561A (en) * 1965-01-22 1969-05-07 Henry Weslake Improvements in or relating to Internal Combustion Engines
DE2323793C2 (en) * 1973-05-11 1983-03-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Outlet and / or inlet duct of a cylinder head for air-cooled reciprocating internal combustion engines
DE2423507A1 (en) * 1974-05-15 1975-11-27 Audi Nsu Auto Union Ag COMBUSTION MACHINE WITH AT LEAST ONE EXHAUST DUCT
JPS5338727Y2 (en) * 1974-10-25 1978-09-20
DE2616028C2 (en) * 1975-04-22 1983-07-14 Honda Giken Kogyo K.K., Tokyo Internal combustion engine with an exhaust duct emanating from an outlet valve
JPS51135206U (en) * 1975-04-22 1976-11-01
US4258547A (en) * 1975-06-05 1981-03-31 Chrysler Corporation Engine cylinder head having thermal insulation in a coolant passage adjacent an exhaust outlet
JPS51157705U (en) * 1975-06-09 1976-12-15
JPS5231217A (en) * 1975-09-04 1977-03-09 Honda Motor Co Ltd Exhaust reaction device for internal-combustion engine
DE2602434A1 (en) * 1976-01-23 1977-07-28 Daimler Benz Ag Sheet metal lining for engine inlet and exhaust ducts - is preformed as two half shells and inserted in mould when casting cylinder head
US4086763A (en) * 1976-04-13 1978-05-02 Fuji Jukogyo Kabushiki Kaisha Thermal reactor system for internal combustion engine
US4197704A (en) * 1976-06-11 1980-04-15 Honda Giken Kogyo Kabushiki Kaisha Exhaust manifold for internal combustion engine
US4195478A (en) * 1977-11-09 1980-04-01 Ford Motor Company Low cost insertable type port liner
JPS555727U (en) * 1978-06-29 1980-01-16

Also Published As

Publication number Publication date
EP0079511B1 (en) 1985-04-24
EP0079511A1 (en) 1983-05-25
ATE12974T1 (en) 1985-05-15
CA1201341A (en) 1986-03-04
US4430856A (en) 1984-02-14
AU8920182A (en) 1983-05-19
BR8206426A (en) 1983-09-27
JPS5891349A (en) 1983-05-31
AU550495B2 (en) 1986-03-20
DE3263294D1 (en) 1985-05-30
JPH042791B2 (en) 1992-01-20
MX157962A (en) 1988-12-28
ZA828295B (en) 1984-06-27
ES8400795A1 (en) 1983-11-01
ES517313A0 (en) 1983-11-01

Similar Documents

Publication Publication Date Title
EP0079511B2 (en) Cylinder head for an internal combustion engine
EP0916837B1 (en) Exhaust gas recirculating device for a combustion engine
DE2616028C2 (en) Internal combustion engine with an exhaust duct emanating from an outlet valve
DE3009453C2 (en) Control device for relief valves of exhaust gas turbochargers
DE2340342A1 (en) COMBUSTION MACHINE WITH A REACTOR FOR THE POST-COMBUSTION OF UNBURNED EXHAUST GAS COMPONENTS
EP0636781A1 (en) Mixing valve, especially an exhaust gas recirculation valve for an internal combustion engine
DE2238257B2 (en) EXHAUST COLLECTOR FOR A COMBUSTION ENGINE
DE19809862A1 (en) Exhaust gas recirculation device for an internal combustion engine
DE4200611C2 (en) Exhaust manifold
EP3387245B1 (en) Regulating device for an internal combustion engine
EP0553936B1 (en) Method for establishing a pipeline system and pipeline system according to this method
DE60100862T3 (en) END CHAMBER FOR A BRAZED HEAT EXCHANGER
DE10228619B4 (en) Exhaust pipe for the exhaust system of a motor vehicle
EP1454109A1 (en) Waste gas heat exchanger
EP0443223A1 (en) Pipe section for a pipe conduit consisting of several parts
EP0715064B1 (en) Exhaust system
DE4310901C2 (en) Butterfly valve
DE19838588A1 (en) Connecting clamp for pipe connection between manifold of road vehicle heat exchangere and pipe conduit feeding heat exchange fluid to manifold or pipe conduit leading fluid away from manifold
DE2616334C2 (en) Exhaust device for an internal combustion engine
DE2516717C3 (en) Connection device for fluid meters
DE2743062A1 (en) THROTTLE VALVE FOR A COMBUSTION ENGINE
DE3742036A1 (en) Fastening arrangement for an exhaust-gas manifold
AT522795B1 (en) CYLINDER HEAD OF AN COMBUSTION ENGINE
DE29612018U1 (en) Exhaust gas recirculation valve
DE19640123C1 (en) Cylinder head of lifting piston for combustion engine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19830423

EL Fr: translation of claims filed
ITCL It: translation for ep claims filed

Representative=s name: LENZI & C.

ITF It: translation for a ep patent filed

Owner name: LENZI & C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI SE

REF Corresponds to:

Ref document number: 12974

Country of ref document: AT

Date of ref document: 19850515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3263294

Country of ref document: DE

Date of ref document: 19850530

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: MTU MOTOREN- UND TURBINEN-UNION FRIEDRICHSHAFEN GM

Effective date: 19851218

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19871014

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19871031

Ref country code: CH

Effective date: 19871031

Ref country code: BE

Effective date: 19871031

ET3 Fr: translation filed ** decision concerning opposition
BERE Be: lapsed

Owner name: DEERE & CY

Effective date: 19871031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82110057.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991111

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000922

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20001010

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20001013

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20001023

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011030

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

EUG Se: european patent has lapsed

Ref document number: 82110057.5

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20011030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020628

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST