EP0162272B1 - Multicylinder internal-combustion engine - Google Patents

Multicylinder internal-combustion engine Download PDF

Info

Publication number
EP0162272B1
EP0162272B1 EP85104487A EP85104487A EP0162272B1 EP 0162272 B1 EP0162272 B1 EP 0162272B1 EP 85104487 A EP85104487 A EP 85104487A EP 85104487 A EP85104487 A EP 85104487A EP 0162272 B1 EP0162272 B1 EP 0162272B1
Authority
EP
European Patent Office
Prior art keywords
housing
combustion engine
internal combustion
cylinder head
engine according
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
EP85104487A
Other languages
German (de)
French (fr)
Other versions
EP0162272A1 (en
Inventor
Lothar Bauer
Richard Bartels
Michael Seils
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0162272A1 publication Critical patent/EP0162272A1/en
Application granted granted Critical
Publication of EP0162272B1 publication Critical patent/EP0162272B1/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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0046—Shape of casings adapted to facilitate fitting or dismantling of engine parts

Definitions

  • the invention relates to a multi-cylinder internal combustion engine with individually arranged cylinder heads and with an air duct guided in the longitudinal direction above the laterally mounted camshaft for the combustion air, a housing with a closed interior for receiving and shielding auxiliary machines and lines, in particular for fuel and lubricating oil is available.
  • the invention has for its object to provide a heat-insulating shield in an internal combustion engine described above for the auxiliary machines and lines mentioned, which can be implemented using existing components with simple means.
  • the air line and the shielding should be designed in such a way that they enable the simplest possible removal of individual cylinder heads.
  • the air line as an existing component of the internal combustion engine, represents a limiting part of the housing and at the same time serves as a load-bearing element, in particular for the side walls directly adjoining it.
  • the walls of the adjacent air line sections adjoining the air line have narrow gaps between their boundary edges, which are sealed by an inserted elastic seal or by sheet metal strips.
  • the housing formed from the walls for each cylinder has a substantially vertical tunnel or the like for the passage of the bumpers of the valve drives, which is formed by an indentation in the rear wall and is delimited from the interior of the housing and which is above and below for receiving the bumpers is provided with sleeve-shaped plug-in pieces, which are connected at the top to the cylinder head and at the bottom to the tappet guide.
  • the high-pressure fuel line In order to make the high-pressure fuel line as short as possible, it is guided by the injection pump located in the interior of the housing through the tunnel across the two bumpers to the cylinder head.
  • An oil collecting space is provided in the interior of the housing and is connected to the interior of the cylinder head only through bores in order to save piping. Therefore, all of the low-pressure lines for oil, water, etc. opening into the interior of the housing are designed as bores with seals in between at the transition points between the cylinder head and the adjacent rear wall of the housing.
  • the bores running in the longitudinal direction in the additional walls of the housing serve, for example, as coolant lines, which are connected to the corresponding supply lines for coolant or the like in the interior of the housing.
  • a wall of the housing running on the engine operating side is provided with screw-on strips which are provided for screwing on mounting covers or corresponding blinds.
  • a structurally advantageous solution is given by the fact that the connecting pieces leading from the air line to the cylinder head at least partially run in the area of the housing to a flange-like section of the rear wall of the housing facing the cylinder head, in which, in addition to the connection for the connecting piece of the air line, other connections for other supply lines are provided and that the rear wall is inclined to facilitate removal or installation of a cylinder head.
  • a common one-piece sealing plate is provided for all connections of supply lines between the flange-like section of the rear wall of the housing and the cylinder head, which sealing plate can be detached from the inside of the rear wall by removing screws when dismantling a cylinder head.
  • oil drain lines running from the oil collection chamber to the crankcase are designed to be particularly load-bearing and serve to support the air line and the parts of the housing connected to it when dismantling the cylinder head.
  • the walls additionally attached to the air line can be provided on the outside and inside with ribs which are arranged vertically and / or inclined on the surface.
  • the cavities between the ribs can be filled with sound insulation to improve vibration damping.
  • an air line 2 for supplying the combustion air is guided in front of the individual cylinder heads, not shown, above the individual injection pumps 1.
  • the air line 2 is assembled from sections 3 which correspond to the width of a cylinder head and are connected to one another by double plug-in pieces 4.
  • additional walls 6 to 9 are provided which extend substantially downwards.
  • the wall 6 delimits the space adjoining in FIG. 1 below the section 3.
  • the wall 6 is designed to be inclined in accordance with the wall 11 of the adjoining cylinder head and extends laterally in accordance with the length of a section 3 of the air line 2.
  • a gap 13 existing between two adjacent rear walls 6 is sealed by an elastic profile seal 14.
  • a bow-shaped high-pressure fuel line 16 leads from the injection pump 1 through the rear wall 6 to the injection nozzle in the cylinder head 12.
  • an indentation of the rear wall 6 leads between the rear wall 6 and the adjacent wall 11 of the cylinder head 12 tunnel-shaped cavity 17 is formed, which is provided for the passage of the vertically extending bumpers 18, 19 for the valve drives.
  • the arrangement is such that the high-pressure fuel line 16 runs between the two bumpers 18, 19.
  • sleeve-shaped plug-in pieces 20 are arranged at the transition points above and below, which engage at the top in the cylinder head 12 and at the bottom in the tappet guide near the camshaft.
  • Recesses 21 are provided in the walls 6 to 8, through which lines 22, 23 and 24 run, for example for nozzle coolants and for the return of leakage fuel.
  • a bore 26 branching off from the line 23 is designed as a bore in the wall 7.
  • a bore 27 leading from the line 24 to the cylinder head 12 is also designed as a bore arranged in the wall 7.
  • the two bores 26 and 27 also run further in the cylinder head 12 than bores 28 and 29 arranged in the housing thereof to the injection nozzle. Seals (not shown) serve to seal the parting line on the wall 11 of the cylinder head 12 between the bores 26, 28 and 27, 29.
  • Oil drain lines 34 are connected to the oil collecting space 30 and open at the bottom in the crankcase 35 of the internal combustion engine.
  • the oil drain lines 34 can be designed to be particularly load-bearing in order to serve as supports for the air line 2 and the parts connected to it when a cylinder head 12 is installed.
  • a connecting piece 37 which leads to a flange 38 on the wall 11 of the cylinder head 12, through which the connection thereof is made with the intake duct 39 for combustion air in the cylinder head 12.
  • a round cord ring 40 serves as a seal in the flange connection 38.
  • a one-piece sealing plate can also be provided between the flange-like rear wall 6 of the housing and the wall 11 of the cylinder head 12 for sealing the existing bores 26-28, 27-29, 31-32 and connecting piece 37 or intake duct 39 is easy to handle when disassembling or reassembling a cylinder head. It is useful if the Sealing plate for dismantling by detaching screws from the inside of the rear wall 6 is detachable.
  • horizontally extending screw strips 42 are arranged in the lower area on a wall 41 partially enveloping the air line 2 for receiving screws 43, which are used to fasten angled mounting covers 44.
  • the assembly covers 44 are fixed on the crankcase 35 by means of screws 45.
  • the mounting cover 44 also has a stop 46 which is held on a cross member 47.
  • the cross member 47 is fastened on the one hand to the crankcase and is used on its side facing the mounting cover 44 for attaching a catwalk, not shown.
  • the lines in the housing 49 maintain a certain temperature during operation without special insulation.
  • the housing 49 provides considerable fire protection and, if the lining is additionally lined, in particular good sound insulation.
  • such a structure enables maintenance-friendly accommodation of components which surround the cylinder head 12.
  • ribs can be arranged on the walls, the spaces between which are additionally filled with a soundproofing material if necessary.
  • a soundproofing material there is also the possibility of designing the walls 6 to 8 in a sandwich construction, sound insulation materials being arranged between the outer and inner shell. It may also be expedient if the outer and inner shells are connected to one another by webs or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die Erfindung bezieht sich auf eine mehrzylindrige Brennkraftmaschine mit einzeln angeordneten Zylinderköpfen und mit einer in Längsrichtung derselben oberhalb der seitlich gelagerten Nokkenwelle geführten Luftleitung für die Verbrennungsluft, wobei ein Gehäuse mit einem geschlossenen Innenraum zur Aufnahme und Abschirmung von Hilfsmaschinen und Leitungen, insbesondere für Kraftstoff und Schmieröl vorhanden ist.The invention relates to a multi-cylinder internal combustion engine with individually arranged cylinder heads and with an air duct guided in the longitudinal direction above the laterally mounted camshaft for the combustion air, a housing with a closed interior for receiving and shielding auxiliary machines and lines, in particular for fuel and lubricating oil is available.

Bei Brennkraftmaschinen grosser Bauart besteht das Problem, eine Vielzahl von Forderungen nach Geräuschbegrenzung, Unfallverhütung, Brandschutz usw. konstruktiv so zu erfüllen, dass die Wartungsfreundlichkeit einer in Rede stehenden Maschine keinesfalls beeinträchtigt wird. Bei einer mit Schweröl betriebenen Brennkraftmaschine wird der Kraftstoff auf ca. 160 °C vorgewärmt, um insbesondere die Einspritzbedingungen zu verbessern. Damit der aufgeheizte Kraftstoff auf dem Wege zu den im Zylinderkopf angeordneten Düsen nicht unzulässig abkühlt, werden die kraftstofführenden Leitungen gemäss einer Grossbrennkraftmaschine der Firma Daihatsu, Typ DL-32, im Innern eines geschlossenen Kastens an die Einspritzorgane herangeführt. Der Kasten ist aussen mit mehreren Montagedeckeln versehen, durch die im Inneren des Kastens befindliche Bauteile zugänglich sind. Allerdings muss bei dieser Brennkraftmaschine für die Demontage beispielsweise eines einzelnen Zylinderkopfes zunächst die gesamte Luftleitung mit grossen Teilen des darunter angeordneten Kastens aufgebaut werden, um an den Zylinderkopf zur Durchführung der erforderlichen Arbeiten heranzukommen. Dies ist recht umständlich und somit aufwendig.In the case of large-scale internal combustion engines, there is the problem of structurally meeting a large number of requirements for noise limitation, accident prevention, fire protection, etc. in such a way that the ease of maintenance of a machine in question is in no way impaired. In the case of an internal combustion engine operated with heavy oil, the fuel is preheated to approximately 160 ° C., in particular to improve the injection conditions. To ensure that the heated fuel does not cool down inadmissibly on the way to the nozzles arranged in the cylinder head, the fuel-carrying lines are led to the injection elements inside a closed box in accordance with a large internal combustion engine from Daihatsu, type DL-32. The outside of the box is provided with several assembly covers, through which components inside the box are accessible. However, in the case of this internal combustion engine for dismantling, for example, a single cylinder head, the entire air line must first be built up with large parts of the box arranged underneath in order to access the cylinder head for carrying out the required work. This is quite cumbersome and therefore expensive.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Brennkraftmaschine eingangs geschilderter Bauweilse für die genannten Hilfsmaschinen und Leitungen eine wärmedämmende Abschirmung zu schaffen, die sich unter Ausnutzung vorhandener Bauteile mit einfachen Mitteln verwirklichen lässt. Zudem sollen die Luftleitung und die Abschirmung so ausgebildet sein, dass sie eine möglichst einfache Demontage einzelner Zylinderköpfe ermöglichen.The invention has for its object to provide a heat-insulating shield in an internal combustion engine described above for the auxiliary machines and lines mentioned, which can be implemented using existing components with simple means. In addition, the air line and the shielding should be designed in such a way that they enable the simplest possible removal of individual cylinder heads.

Die Aufgabe wird erfindungsgemäss gelöst durch die Kombination folgender Merkmale:

  • a) die Luftleitung besteht aus einzelnen, sich jeweils über eine Zylinderbreite erstreckende Teilstücke;
  • b) jedes Teilstück ist mit zusätzlichen Wänden ausgerüstet, von denen einzelne Wände vom Zylinderkopf ausgehend mit in Längsrichtung der jeweiligen Wand verlaufenden Bohrungen versehen sind, die mit Versorgungsleitungen in Verbindung stehen, und
  • c) jedes Teilstück ist ausserdem mit Versteifungswänden ausgerüstet, die Durchbrüche für Leitungen, Pumpengestänge usw. aufweisen und die auch als Halter für einzelne oder gebündelte Leitungen sowie für die Montagedeckel dienen.
The object is achieved according to the invention by combining the following features:
  • a) the air line consists of individual sections each extending over a cylinder width;
  • b) each section is equipped with additional walls, of which individual walls, starting from the cylinder head, are provided with bores running in the longitudinal direction of the respective wall, which are connected to supply lines, and
  • c) each section is also equipped with stiffening walls, which have openings for lines, pump rods, etc. and which also serve as holders for individual or bundled lines and for the mounting cover.

Die Luftleitung stellt hierbei als ohnehin vorhandenes Bauteil der Brennkraftmaschine einen begrenzenden Teil des Gehäuses dar und dient gleichzeitig als tragendes Element, insbesondere für die daran unmittelbar anschliessenden Seitenwände. Durch die Unterteilung der Luftleitung in Teilstücke gemäss der Zylinderbreite können diese bei Bedarf mitsamt den damit verbundenen Wänden des Gehäuses für sich in verhältnismässig einfacher Weise ab- bzw. angebaut werden.The air line, as an existing component of the internal combustion engine, represents a limiting part of the housing and at the same time serves as a load-bearing element, in particular for the side walls directly adjoining it. By dividing the air line into sections according to the cylinder width, these can, if necessary, be dismantled or attached together with the associated walls of the housing in a relatively simple manner.

In Weiterbildung der Erfindung ist vorgesehen, dass die an die Luftleitung anschliessenden Wände der benachbarten Luftleitungsteilstücke zwischen ihren Begrenzungskanten enge Spalte aufweisen, die durch eingelegte elastische Dichtung oder durch aufgelegte Blechstreifen abgedichtet sind.In a further development of the invention it is provided that the walls of the adjacent air line sections adjoining the air line have narrow gaps between their boundary edges, which are sealed by an inserted elastic seal or by sheet metal strips.

Dabei weist das aus den Wänden gebildete Gehäuse für jeden Zylinder einen im wesentlichen vertikal verlaufenden Tunnel oder dgl. für den Durchtritt der Stossstangen der Ventiltriebe auf, der durch eine Einbuchtung der rückseitigen Wand gebildet und gegenüber dem Innenraum des Gehäuses abgegrenzt ist und der oben und unten zur Aufnahme der Stossstangen mit hülsenförmigen Steckstücken versehen ist, die oben an den Zylinderkopf und unten an die Stösselführung angeschlossen sind.The housing formed from the walls for each cylinder has a substantially vertical tunnel or the like for the passage of the bumpers of the valve drives, which is formed by an indentation in the rear wall and is delimited from the interior of the housing and which is above and below for receiving the bumpers is provided with sleeve-shaped plug-in pieces, which are connected at the top to the cylinder head and at the bottom to the tappet guide.

Um die Kraftstoffhochdruckleitung möglichst kurz auszubilden, ist diese von der im Innenraum des Gehäuses befindlichen Einspritzpumpe durch den Tunnel quer zwischen beiden Stossstangen hindurch zum Zylinderkopf geführt.In order to make the high-pressure fuel line as short as possible, it is guided by the injection pump located in the interior of the housing through the tunnel across the two bumpers to the cylinder head.

Im Innenraum des Gehäuses ist ein Ölsammelraum vorgesehen, der zur Einsparung von Rohrleitungen lediglich durch Bohrungen mit dem Innenraum des Zylinderkopfes in Verbindung steht. Daher sind alle im Innenraum des Gehäuses mündenden Niederdruckleitungen für Öl, Wasser usw. an den Übergangsstellen zwischen dem Zylinderkopf und der angrenzenden Rückwand des Gehäuses als Bohrungen mit zwischenliegenden Dichtungen ausgebildet.An oil collecting space is provided in the interior of the housing and is connected to the interior of the cylinder head only through bores in order to save piping. Therefore, all of the low-pressure lines for oil, water, etc. opening into the interior of the housing are designed as bores with seals in between at the transition points between the cylinder head and the adjacent rear wall of the housing.

Weiterhin ist zur Einsparung von Rohrleitungen vorgesehen, dass die in den zusätzlichen Wänden des Gehäuses in Längsrichtung verlaufenden Bohrungen beispielsweise als Kühlmittelleitungen dienen, die im Innenraum des Gehäuses an die entsprechenden Versorgungsleitungen für Kühlmittel oder dgl. angeschlossen sind.To save piping, it is further provided that the bores running in the longitudinal direction in the additional walls of the housing serve, for example, as coolant lines, which are connected to the corresponding supply lines for coolant or the like in the interior of the housing.

Gemäss einer einfachen Ausgestaltung der Erfindung ist eine an der Motorbedienungsseite verlaufende Wand des Gehäuses mit Anschraubleisten versehen, die zum Anschrauben von Montagedeckeln bzw. entsprechenden Jalousien vorgesehen sind.According to a simple embodiment of the invention, a wall of the housing running on the engine operating side is provided with screw-on strips which are provided for screwing on mounting covers or corresponding blinds.

Eine konstruktiv vorteilhafte Lösung ist dadurch gegeben, dass die von der Luftleitung zum Zylinderkopf führenden Anschlussstutzen zumindest teilweise im Bereich des Gehäuses zu einem dem Zylinderkopf zugewandten flanschartigen Abschnitt der Rückwand des Gehäuses verlaufen, in dem neben dem Anschluss für den Stutzen der Luftleitung noch andere Anschlüsse für sonstige Versorgungsleitungen vorgesehen sind und dass die Rückwand zur Erleichterung beim Aus- bzw. Einbau eines Zylinderkopfes geneigt angeordnet ist.A structurally advantageous solution is given by the fact that the connecting pieces leading from the air line to the cylinder head at least partially run in the area of the housing to a flange-like section of the rear wall of the housing facing the cylinder head, in which, in addition to the connection for the connecting piece of the air line, other connections for other supply lines are provided and that the rear wall is inclined to facilitate removal or installation of a cylinder head.

Zur Erleichterung von Montagearbeiten ist ferner vorgesehen, dass für alle zwischen dem flanschartigen Abschnitt der Rückwand des Gehäuses und dem Zylinderkopf vorhandenen Anschlüsse von Versorgungsleitungen eine gemeinsame einstückige Dichtungsplatte vorgesehen ist, die bei der Demontage eines Zylinderkopfes durch Abdrückschrauben von der Innenseite der Rückwand aus lösbar ist.To facilitate assembly work, it is also provided that a common one-piece sealing plate is provided for all connections of supply lines between the flange-like section of the rear wall of the housing and the cylinder head, which sealing plate can be detached from the inside of the rear wall by removing screws when dismantling a cylinder head.

Ferner kann es auch vorteilhaft sein, wenn im Bereich des Gehäuses vom Ölsammelraum zum Kurbelgehäuse verlaufende Ölablaufleitungen besonders tragfähig ausgebildet sind und zur Abstützung der Luftleitung sowie der damit verbundenen Teile des Gehäuses bei der Demontage des Zylinderkopfes dienen.Furthermore, it can also be advantageous if the oil drain lines running from the oil collection chamber to the crankcase are designed to be particularly load-bearing and serve to support the air line and the parts of the housing connected to it when dismantling the cylinder head.

Zur Dämpfung unerwünschter Schwingungen können die an der Luftleitung zusätzlich befestigten Wände aussen und innen mit Rippen versehen sein, welche senkrecht und/oder geneigt auf der Oberfläche angeordnet sind. Dabei können zur Verbesserung der Schwingungsdämpfung die Hohlräume zwischen den Rippen mit Schalldämmstoffen gefüllt sein.To dampen undesired vibrations, the walls additionally attached to the air line can be provided on the outside and inside with ribs which are arranged vertically and / or inclined on the surface. The cavities between the ribs can be filled with sound insulation to improve vibration damping.

Schliesslich wird auch vorgeschlagen, die zur Bildung des Gehäuses zusätzlich angebrachten Wände in Sandwich-Bauweise auszuführen, wobei zwischen der äusseren und inneren Schale Dämmstoffe vorgesehen und die äussere und innere Schale durch Stege miteinander verbunden sind.Finally, it is also proposed to design the walls which are additionally attached to form the housing in a sandwich construction, insulation materials being provided between the outer and inner shells and the outer and inner shells being connected to one another by webs.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnung näher beschrieben. Es zeigt:

  • Fig. 1 einen Längsschnitt eines Teils der Luftleitung und des damit verbundenen Gehäuses für die Kraftstoff- und Schmierölleitungen;
  • Fig. 2 einen Schnitt nach der Linie 11-11 in Fig. 1;
  • Fig. 3 einen Schnitt nach der Linie 111-111 in Fig. 1 in einem anderen Ausschnitt;
  • Fig. 4 einen Schnitt nach der Linie IV-IV in Fig. 2.
An embodiment of the invention is described below with reference to the drawing. It shows:
  • Figure 1 is a longitudinal section of part of the air line and the associated housing for the fuel and lubricating oil lines.
  • Figure 2 is a section along the line 11-11 in Fig. 1.
  • 3 shows a section along the line 111-111 in FIG. 1 in another detail;
  • 4 shows a section along the line IV-IV in FIG. 2nd

An einer grossen Dieselbrennkraftmaschine ist gemäss Fig. 1 vor den nicht gezeigten einzelnen Zylinderköpfen oberhalb der Einzeleinspritzpumpen 1 eine Luftleitung 2 für die Zuführung der Verbrennungsluft entlanggeführt. Die Luftleitung 2 ist aus Teilstücken 3 zusammengefügt, welche der Breite eines Zylinderkopfes entsprechen und durch Doppelsteckstücke 4 miteinander verbunden sind. An den Teilstücken 3 der Luftleitung 2 sind zusätzliche Wände 6 bis 9 vorgesehen, die sich im wesentlichen nach unten erstrecken. Die Wand 6 begrenzt als Rückwand den in Fig. 1 unterhalb des Teilstückes 3 anschliessenden Raum. Ausserdem ist die Wand 6 entsprechend der Wand 11 des anschliessenden Zylinderkopfes geneigt ausgebildet und erstreckt sich seitlich entsprechend der Länge eines Teilstückes 3 der Luftleitung 2. Ein zwischen jeweils zwei benachbarten Rückwänden 6 bestehender Spalt 13 ist durch eine elastische Profildichtung 14 abgedichtet. Die den Spalt 13 begrenzenden Kanten 15 können mechanisch bearbeitet sein, um eine definierte Spaltbreite zu erhalten. Von der Einspritzpumpe 1 führt eine bügelförmige Kraftstoffhochdruckleitung 16 durch die Rückwand 6 zur Einspritzdüse in den Zylinderkopf 12. Im Bereich der durch die Rückwand 6 hindurchgeführten Kraftstoffhochdruckleitung 16 ist zwischen der Rückwand 6 und der angrenzenden Wand 11 des Zylinderkopfes 12 durch eine Einbuchtung der Rückwand 6 ein tunnelförmiger Hohlraum 17 gebildet, der für den Durchtritt der vertikal verlaufenden Stossstangen 18,19 für die Ventiltriebe vorgesehen ist. Dabei ist die Anordnung so getroffen, dass die Kraftstoffhochdruckleitung 16 zwischen beiden Stossstangen 18, 19 hindurch verläuft. Zur Abdichtung der in den Hohlräumen 17 geführten Stossstangen 18, 19 sind gemäss Fig. 2 an den Übergangsstellen oben und unten hülsenförmige Steckstücke 20 angeordnet, die oben in den Zylinderkopf 12 und unten in die Stösselführung nahe der Nockenwelle eingreifen.On a large diesel internal combustion engine, according to FIG. 1, an air line 2 for supplying the combustion air is guided in front of the individual cylinder heads, not shown, above the individual injection pumps 1. The air line 2 is assembled from sections 3 which correspond to the width of a cylinder head and are connected to one another by double plug-in pieces 4. On the sections 3 of the air duct 2 additional walls 6 to 9 are provided which extend substantially downwards. As the rear wall, the wall 6 delimits the space adjoining in FIG. 1 below the section 3. In addition, the wall 6 is designed to be inclined in accordance with the wall 11 of the adjoining cylinder head and extends laterally in accordance with the length of a section 3 of the air line 2. A gap 13 existing between two adjacent rear walls 6 is sealed by an elastic profile seal 14. The edges 15 delimiting the gap 13 can be machined in order to obtain a defined gap width. A bow-shaped high-pressure fuel line 16 leads from the injection pump 1 through the rear wall 6 to the injection nozzle in the cylinder head 12. In the area of the high-pressure fuel line 16 led through the rear wall 6, an indentation of the rear wall 6 leads between the rear wall 6 and the adjacent wall 11 of the cylinder head 12 tunnel-shaped cavity 17 is formed, which is provided for the passage of the vertically extending bumpers 18, 19 for the valve drives. The arrangement is such that the high-pressure fuel line 16 runs between the two bumpers 18, 19. To seal the bumpers 18, 19 guided in the cavities 17, according to FIG. 2, sleeve-shaped plug-in pieces 20 are arranged at the transition points above and below, which engage at the top in the cylinder head 12 and at the bottom in the tappet guide near the camshaft.

In den Wänden 6 bis 8 sind Aussparungen 21 vorgesehen, durch die Leitungen 22, 23 und 24 beispielsweise für Düsenkühlmittel sowie für die Rückführung von Leckkraftstoff verlaufen. Eine von der Leitung 23 abzweigende Bohrung 26 ist als Bohrung in der Wand 7 ausgebildet. Auch eine von der Leitung 24 zum Zylinderkopf 12 führende Bohrung 27 ist als eine in der Wand 7 angeordnete Bohrung ausgeführt. Die beiden Bohrungen 26 und 27 verlaufen auch im Zylinderkopf 12 als im Gehäuse desselben angeordnete Bohrungen 28 und 29 weiter zu der Einspritzdüse. Zur Abdichtung der Trennfuge an der Wand 11 des Zylinderkopfes 12 zwischen den Bohrungen 26, 28 und 27, 29 dienen nicht dargestellte Dichtungen. Zwischen den beiden Bohrungen 26 und 27 befindet sich nahe der Rückwand 6 ein rohrförmiger Ölsammelraum 30, der durch Bohrungen 31, 32 und 33 mit den für die Ölrückführung vorgesehenen Räumen des Zylinderkopfes 12 in Verbindung stehen. An den Ölsammelraum 30 sind Ölablaufleitungen 34 angeschlossen, die unten im Kurbelgehäuse 35 der Brennkraftmaschine münden. Die Ölablaufleitungen 34 können besonders tragfähig ausgebildet sein, um bei der Montage eines Zylinderkopfes 12 als Stützen der Luftleitung 2 und den damit verbundenen Teilen zu dienen.Recesses 21 are provided in the walls 6 to 8, through which lines 22, 23 and 24 run, for example for nozzle coolants and for the return of leakage fuel. A bore 26 branching off from the line 23 is designed as a bore in the wall 7. A bore 27 leading from the line 24 to the cylinder head 12 is also designed as a bore arranged in the wall 7. The two bores 26 and 27 also run further in the cylinder head 12 than bores 28 and 29 arranged in the housing thereof to the injection nozzle. Seals (not shown) serve to seal the parting line on the wall 11 of the cylinder head 12 between the bores 26, 28 and 27, 29. Between the two bores 26 and 27 there is a tubular oil collecting space 30 near the rear wall 6, which are connected through bores 31, 32 and 33 to the spaces of the cylinder head 12 provided for the oil return. Oil drain lines 34 are connected to the oil collecting space 30 and open at the bottom in the crankcase 35 of the internal combustion engine. The oil drain lines 34 can be designed to be particularly load-bearing in order to serve as supports for the air line 2 and the parts connected to it when a cylinder head 12 is installed.

Von der Luftleitung 2 zweigt von jedem der Teilstücke 3 ein Anschlussstutzen 37 ab, der zu einer Flanschverbidung 38 an der Wand 11 des Zylinderkopfes 12 führt, durch die der Anschluss desselben mit dem Ansaugkanal 39 für Verbrennungsluft im Zylinderkopf 12 hergestellt ist. Als Dichtung in der Flanschverbindung 38 dient ein Rundschnurring 40.From the air line 2 branches off from each of the sections 3, a connecting piece 37, which leads to a flange 38 on the wall 11 of the cylinder head 12, through which the connection thereof is made with the intake duct 39 for combustion air in the cylinder head 12. A round cord ring 40 serves as a seal in the flange connection 38.

Anstelle des Rundschnurringes 40 kann zwischen der flanschartigen Rückwand 6 des Gehäuses und der Wand 11 des Zylinderkopfes 12 zur Abdichtung der vorhandenen Bohrungen 26-28, 27-29, 31-32 und Anschlussstutzen 37 bzw. Ansaugkanal 39 auch eine einstückige Dichtungsplatte vorgesehen sein, die sich bei der De- bzw. Remontage eines Zylinderkopfes leicht handhaben lässt. Dabei ist es zweckmässig, wenn die Dichtungsplatte zur Demontage durch Abdrückschrauben von der Innenseite der Rückwand 6 her lösbar ist.Instead of the round cord ring 40, a one-piece sealing plate can also be provided between the flange-like rear wall 6 of the housing and the wall 11 of the cylinder head 12 for sealing the existing bores 26-28, 27-29, 31-32 and connecting piece 37 or intake duct 39 is easy to handle when disassembling or reassembling a cylinder head. It is useful if the Sealing plate for dismantling by detaching screws from the inside of the rear wall 6 is detachable.

An der Motorbedienungsseite sind an einer die Luftleitung 2 teilweise umhüllenden Wand 41 im unteren Bereich horizontal verlaufende Anschraubleisten 42 zur Aufnahme von Schrauben 43 angeordnet, die zur Befestigung von abgewinkelten Montagedeckeln 44 dienen. Die Montagedeckel 44 sind unten mittels Schrauben 45 am Kurbelgehäuse 35 fixiert. Der Montagedeckel 44 hat ferner einen Anschlag 46, der an einer Traverse 47 gehaltert ist. Die Traverse 47 ist einerseits am Kurbelgehäuse befestigt und dient an ihrer dem Montagedeckel 44 zugewandten Seite zum Anbringen eines nicht dargestellten Laufsteges.On the engine operating side, horizontally extending screw strips 42 are arranged in the lower area on a wall 41 partially enveloping the air line 2 for receiving screws 43, which are used to fasten angled mounting covers 44. The assembly covers 44 are fixed on the crankcase 35 by means of screws 45. The mounting cover 44 also has a stop 46 which is held on a cross member 47. The cross member 47 is fastened on the one hand to the crankcase and is used on its side facing the mounting cover 44 for attaching a catwalk, not shown.

Die mit der Luftleitung 2 verbundenen Wände 6, 7 und 8 bilden zusammen mit der darunter angrenzenden Wand 48 des Kurbelgehäuses 35 und mit den Montagedeckeln 44 ein geschlossenes Gehäuse 49, dessen Innenraum 50 alle kraftstoff-und schmierölführenden Leitungen 16, 22, 23, 24 und 30 enthält. Die im Gehäuse 49 befindlichen Leitungen behalten während des Betriebes ohne eine besondere Isolation eine bestimmte Temperatur bei. Ausserdem ist durch das Gehäuse 49 ein beachtlicher Brandschutz sowie bei zusätzlicher Auskleidung insbesondere der Montagedeckel auch eine gute Schalldämmung gegeben. Ausserdem ermöglicht ein solcher Aufbau eine wartungsfreundliche Unterbringung von Bauteilen, welche den Zylinderkopf 12 umgeben.The walls 6, 7 and 8 connected to the air line 2 together with the wall 48 of the crankcase 35 adjoining it underneath and with the mounting covers 44 form a closed housing 49, the interior 50 of which all lines 16, 22, 23, 24 carrying fuel and lubricating oil 30 contains. The lines in the housing 49 maintain a certain temperature during operation without special insulation. In addition, the housing 49 provides considerable fire protection and, if the lining is additionally lined, in particular good sound insulation. In addition, such a structure enables maintenance-friendly accommodation of components which surround the cylinder head 12.

Zur Dämpfung von unerwünschten Schwingungen können an den Wänden 6 bis 8 Rippen angeordnet sein, deren Zwischenräume bei Bedarf zusätzlich mit einem Schalldämmstoff gefüllt sind. Es besteht auch die Möglichkeit, die Wände 6 bis 8 in Sandwich-Bauweise auszuführen, wobei zwischen der äusseren und inneren Schale Schalldämmstoffe angeordnet sind. Dabei kann es ferner zweckdienlich sein, wenn die äussere und innere Schale durch Stege oder dgl. miteinander verbunden sind.To dampen unwanted vibrations 6 to 8 ribs can be arranged on the walls, the spaces between which are additionally filled with a soundproofing material if necessary. There is also the possibility of designing the walls 6 to 8 in a sandwich construction, sound insulation materials being arranged between the outer and inner shell. It may also be expedient if the outer and inner shells are connected to one another by webs or the like.

Claims (14)

1. A multi-cylinder internal combustion engine with individually-arranged cylinder heads (12) and with an air conduit (2) extending in the longitudinal direction of the cylinder heads above the laterally-mounted cam-shaft for the combustion air, wherein a housing (49) having a closed interior space (50) is provided for the reception and screening of auxiliary machines (1) and conduits (16, 22 to 24 and 30) especially for fuel and lubricating oil, characterised by the combination of the following features:
a) the air conduit (2) comprises individual component pieces (3) each extending over one cylinder width;
b) each component piece (3) is equipped with additional walls (6 to 8), of which individual walls (7), starting from the cylinder head (12), are provided with bores (26, 27) extending in the longitudinal direction of the respective wall (7), which bores are in communication with supply conduits (22, 23, 24);
c) each component piece (3) is also equipped with stiffening walls (9) which comprise apertures (21) for conduits, pump linkages etc. and also serve as holders for single or bunched conduits and for assembly access covers (44).
2. An internal combustion engine according to claim 1, characterised in that the walls (6) adjoining the air conduit (2) of the neighbouring air conduit component pieces (3) have narrow gaps (13) between their defining edges (15) which are sealed by inserted elastic seals (14) or by applied sheet metal strips.
3. An internal combustion engine according to claims 1 and 2, characterised in that the housing formed from the walls comprises, for each cylinder, a substantially vertically-extending tunnel (17) or the like for the passage of the valve drive push rods (18, 19), which tunnel is formed by an inward bulge of the rear wall (6), is limited from the interior space of the housing (49) and is provided at top and bottom, for the reception of the push rods (18, 19), with connector pieces (20) of sleeve form which are connected at the top to the cylinder head (12) and at the bottom to the push rod guide.
4. An internal combustion engine according to any one of the preceding claims, characterised in that the high-pressure fuel conduit (16) is conducted from the injection pump (1) situated in the interior of the housing (49) through the tunnel (17) and transversely through between the two push rods (18,19) to the cylinder head (12).
5. An internal combustion engine according to any one of the preceding claims, characterised in that, in the interior (50) of the housing (49), an oil-collecting chamber (30) is provided which is in communication only through bores (31, 32, 33) with the interior of the cylinder head (12).
6. An internal combustion engine according to any one of the preceding claims, characterised in that all low-pressure conduits (26, 27, 28, 31) for oi.l, water, etc. which open to the interior of the housing (49) are formed, at the transition points between the cylinder head (12) and the adjoining rear wall (6) of the housing (49), as bores with interposed seals.
7. An internal combustion engine according to any one of the preceding claims, characterised in that the bores (26, 27) extending in the longitudinal direction in the additional walls (6 to 8) of the housing (49) serve by way of example as cooling medium conduits which are connected in the interior of the housing (4) to the corresponding supply conduits (23, 24) for cooling media or the like.
8. An internal combustion engine according to any one of the preceding claims, characterised in that a wall (41) of the housing (49) extending on the engine service side is provided with screw-on strips (42) which are provided for the attachment by screwing of assembly access covers (44) or corresponding louvres.
9. An internal combustion engine according to any one of the preceding claims, characterised in that the connector pieces (37) leading from the air conduit (2) to the cylinder head (12) extend at least partially in the region of the housing (49) to a flange-type section, facing the cylinder head (12), of the rear wall (6) of the housing (49) in which, beside the connection (38) for the connector piece (37) of the air conduit (2), still other connections are provided for other supply conduits (22 to 24 and 30), and in that the rear wall (6) is arranged to be inclined so as to facilitate the installation and removal of a cylinder head (12).
10. An internal combustion engine according to any one of the preceding claims, characterised in that, for all connections of supply conduits (22 to 24 and 30) present between the flange-type section of the rear wall (6) of the housing (49) and the cylinder head (12), one common one-piece seal plate is provided which can be released from the inside of the rear wall (6) by set screws on the removal of a cylinder head (12).
11. An internal combustion engine according to any one of the preceding claims, characterised in that oil drain conduits (34) extending in the region of the housing (49) from the oil-collecting chamber (30) to the crank case (35) are made especially capable of load support and serve for supporting the air conduit (2) and the parts of the housing (49) connected therewith in the dismantling of the cylinder head (12).
12. An internal combustion engine according to any one of the preceding claims, characterised in that the walls (6 to 8) additionally secured to the air conduit (2) are externally and internally provided with fins which are arranged perpendicularly and/or an inclination on the surface.
13. An internal combustion engine according to any one of the preceding claims, characterised in that the cavities between the fins are filled with sound insulation materials.
14. An internal combustion engine according to any one of the preceding claims, characterised in that the walls (6 to 8) additionally provided for the formation of the housing (49) are made in sandwich construction style, with sound insulation materials provided between the outer and inner shells and the outer and inner shells interconnected by webs.
EP85104487A 1984-04-14 1985-04-12 Multicylinder internal-combustion engine Expired EP0162272B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3414265 1984-04-14
DE19843414265 DE3414265A1 (en) 1984-04-14 1984-04-14 MULTI-CYLINDER COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0162272A1 EP0162272A1 (en) 1985-11-27
EP0162272B1 true EP0162272B1 (en) 1988-06-01

Family

ID=6233685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104487A Expired EP0162272B1 (en) 1984-04-14 1985-04-12 Multicylinder internal-combustion engine

Country Status (3)

Country Link
EP (1) EP0162272B1 (en)
DE (2) DE3414265A1 (en)
FI (1) FI78971C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2389147A (en) 2002-05-31 2003-12-03 Man B & W Diesel Ltd I.c. engine air manifold arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2159460B2 (en) * 1971-12-01 1978-01-26 Klöckner-Humboldt-Deutz AG, 5000 Köln Compact liq. cooled IC engine - uses cooled accessory mountings to provide protection of hot spots
DE2710885A1 (en) * 1977-03-12 1978-09-14 Kloeckner Humboldt Deutz Ag Fuel injection engine with uncooled exhaust to turbocharger - has baffle separating hot exhaust from fuel carrying components
IT1106986B (en) * 1978-01-20 1985-11-18 Fiat Spa AIR SUPPLY SYSTEM TO A DIESEL ENGINE

Also Published As

Publication number Publication date
FI78971C (en) 1989-10-10
DE3563091D1 (en) 1988-07-07
DE3414265A1 (en) 1985-10-24
FI851448L (en) 1985-10-15
EP0162272A1 (en) 1985-11-27
FI78971B (en) 1989-06-30
FI851448A0 (en) 1985-04-11

Similar Documents

Publication Publication Date Title
DE69918194T2 (en) Cylinder block construction
DE3032253C2 (en) Internal combustion engine, especially diesel engine
DE69826381T2 (en) Gas compressor with water-cooled cylinder head
DE2420051A1 (en) CYLINDER HEAD BLOCK
DE1775468B2 (en) Internal combustion engine with noise-absorbing casing
DE69408465T2 (en) INTERNAL COMBUSTION ENGINE
EP0671552B1 (en) Cooling system for an internal combustion engine
DE1576775B2 (en) COMBUSTION ENGINE WITH SOUND-INSULATING CASING
EP0088157A1 (en) Cylinder head for a water-cooled internal-combustion engine
DE112017000095T5 (en) Fixing structure for heat-insulating cover
DE3044516C2 (en) Rocker arm housing for internal combustion engine
EP0162272B1 (en) Multicylinder internal-combustion engine
DE19633485B4 (en) Liquid-cooled internal combustion engine
DE2839622A1 (en) IMPROVEMENTS FOR AIR-COOLED COMBUSTION MACHINES FOR SOUND ATTENUATION
DE2817486C2 (en) Turbocharged internal combustion engine
DE4119594A1 (en) Fluid-cooled light alloy cylinder head - has lower section with open cooling fluid chambers, in area of cylinder head dome
DE19712090C1 (en) Reciprocating piston engine, especially large diesel engine
DE938159C (en) Fluid-cooled cylinder head of internal combustion engines
DE10138698B4 (en) Engine in DOHC design
DE2952490C2 (en) Cylinder head for compression-ignited internal combustion engines with pre-combustion chambers
EP0182323B1 (en) Liquid-cooled internal-combustion engine
DE19746948C2 (en) Cylinder block structure for a V-type vehicle internal combustion engine
AT394758B (en) INTERNAL COMBUSTION ENGINE
DE10026376B4 (en) Liquid cooled cylinder head for an internal combustion engine
DE1455741C3 (en) Cooling device for the coolant of the internal combustion engine of a motor vehicle

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): DE FR GB IT NL

17P Request for examination filed

Effective date: 19851005

17Q First examination report despatched

Effective date: 19860825

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3563091

Country of ref document: DE

Date of ref document: 19880707

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910117

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19910313

Year of fee payment: 7

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

Ref country code: GB

Payment date: 19910315

Year of fee payment: 7

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910430

Year of fee payment: 7

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

Ref country code: GB

Effective date: 19920412

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

Ref country code: NL

Effective date: 19921101

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19921230

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

Ref country code: DE

Effective date: 19930101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST