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EP0379719B1 - Rocker arms arrangement in an internal-combustion engine - Google Patents

Rocker arms arrangement in an internal-combustion engine Download PDF

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Publication number
EP0379719B1
EP0379719B1 EP89123764A EP89123764A EP0379719B1 EP 0379719 B1 EP0379719 B1 EP 0379719B1 EP 89123764 A EP89123764 A EP 89123764A EP 89123764 A EP89123764 A EP 89123764A EP 0379719 B1 EP0379719 B1 EP 0379719B1
Authority
EP
European Patent Office
Prior art keywords
rocker
cover plate
cylinder head
arm
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 - Lifetime
Application number
EP89123764A
Other languages
German (de)
French (fr)
Other versions
EP0379719A1 (en
Inventor
Toni Kleinschmidt
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 EP0379719A1 publication Critical patent/EP0379719A1/en
Application granted granted Critical
Publication of EP0379719B1 publication Critical patent/EP0379719B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a diesel engine according to the preamble of claim 1, as known from GB-B-532 275.
  • the injection valves can only be accommodated on the cylinder head side opposite the channels.
  • the camshaft is usually accommodated with bumpers, rocker arms and rocker arm brackets for actuating the gas exchange valves on the side of the injection valves. Since the tilting jack brackets are arranged in the area of the cylinder center, space problems arise when accommodating the injection valves, particularly if the injection valves are to be installed relatively steeply and in the cylinder center and at the same time are to remain outside the valve cover.
  • the object of the invention is to implement an injection valve with a steep and central installation position in a four-stroke internal combustion engine of the arrangement described above.
  • the arrangement according to the invention offers the advantage of ensuring the required space for the injection valves and still obtaining the simple solution with a rocker arm bracket for two rocker arms.
  • rocker arm brackets are usually attached to the cylinder head with two screws. However, it can also be advantageous to use only one screw, advantageously a cylinder head screw, for fastening a rocker arm bracket.
  • the injectors can be housed under the valve cover.
  • the arrangement according to the invention of the injection valves according to claim 3 has the advantage that they are accessible without dismantling the valve cover and in the event of a break in the injection line, no lubricating oil thinning occurs. In addition, it is not necessary to pass the injection line through the valve cover.
  • FIG. 1 The arrangement according to the invention according to FIG. 1 consists of several cylinders 1 arranged in series, onto which a cylinder head 2, which is designed as a block head, is fastened with cylinder head screws 3.
  • the rocker arm brackets 7 are combined for two adjacent gas exchange valves of adjacent cylinders.
  • the rocker arm brackets 7 are fastened to the block head with two fastening screws 8 in the middle between two adjacent cylinders 1. They carry the rocker arms 4 on the shaft ends 9, which are axially fixed with retaining rings 16.
  • a separate rocker arm bracket is arranged for the outer valve.
  • the rocker arm bracket is designed as a round pin 10. Since the round bolt 10 can be made from rod material, a particularly simple solution results. As can be seen in Figure 3, the round bolt 10 lies with a flat 13 on the cover plate 6 of the cylinder head 2 and is screwed on with two fastening screws 8. In the solution according to FIGS. 2 and 3, the cover plate 6 is pulled up to the level of the run bolt 10. It has slots 11 into which the side surfaces 14 of the round bolts 10 fit and serve to fix these round bolts in position.
  • the rocker arms in this version are axially fixed by the slots 11, since the width of the slots 11 corresponds to the width of the rocker arms 4 in the region of their bearings 12. In this case, circlips can be omitted, which further simplifies the arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Die Erfindung betrifft einen Dieselmotor nach dem Oberbegriff des Anspruchs 1, wie er aus GB-B-532 275 bekannt ist.The invention relates to a diesel engine according to the preamble of claim 1, as known from GB-B-532 275.

Bei Viertakt-Brennkraftmaschinen, bei denen die Einlaß- und Auslaßkanäle auf einer Zylinderkopfseite angeordnet sind, können die Einspritzventile nur auf der den Kanälen gegenüberliegenden Zylinderkopfseite untergebracht werden. Üblicherweise wird bei solchen Viertakt-Brennkraftmaschinen die Nockenwelle mit Stoßstangen, Kipphebeln und Kipphebelböcken zur Betätigung der Gaswechselventile auf der Seite der Einspritzventile untergebracht. Da die Kipphelbelböcke im Bereich der Zylindermitte angeordnet sind, ergeben sich Platzprobleme bei der Unterbringung der Einspritzventile, insbesondere dann, wenn die Einspritzventile relativ steil und in Zylindermitte eingebaut werden sollen und zugleich außerhalb der Ventilhaube bleiben sollen.In four-stroke internal combustion engines in which the intake and exhaust ports are arranged on one cylinder head side, the injection valves can only be accommodated on the cylinder head side opposite the channels. In such four-stroke internal combustion engines, the camshaft is usually accommodated with bumpers, rocker arms and rocker arm brackets for actuating the gas exchange valves on the side of the injection valves. Since the tilting jack brackets are arranged in the area of the cylinder center, space problems arise when accommodating the injection valves, particularly if the injection valves are to be installed relatively steeply and in the cylinder center and at the same time are to remain outside the valve cover.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Viertakt-Brennkraftmaschine der oben beschriebenen Anordnung ein Einspritzventil mit steiler und zentraler Einbaulage zu realisieren.The object of the invention is to implement an injection valve with a steep and central installation position in a four-stroke internal combustion engine of the arrangement described above.

Diese Aufgabe wird durch den kennzeichnenden Teil des Anspruchs 1 gelöst. Durch die erfindungsgemäße Anordnung der Kipphebelböcke wird erreicht, daß in der Mitte eines jeden Zylinders im Zylinderkopf genügend Raum zur steilen und zentralen Anordnung des jeweiligen Einspritzventils besteht.This object is solved by the characterizing part of claim 1. The arrangement of the rocker arm brackets according to the invention ensures that there is sufficient space in the center of each cylinder in the cylinder head for the steep and central arrangement of the respective injection valve.

Bei Blockzylinderköpfen bietet die erfindungsgemäße Anordnung den Vorteil, den erforderlichen Platz für die Einspritzventile sicherzustellen und trotzdem die einfache Lösung mit einem Kipphebelbock für zwei Kipphebel zu erhalten.In the case of block cylinder heads, the arrangement according to the invention offers the advantage of ensuring the required space for the injection valves and still obtaining the simple solution with a rocker arm bracket for two rocker arms.

Die Kipphebelböcke werden üblicherweise mit zwei Schrauben am Zylinderkopf befestigt. Es kann aber auch vorteilhaft sein, nur eine Schraube und zwar vorteilhafterweise eine Zylinderkopfschraube zur Befestigung eines Kipphebelbockes zu verwenden.The rocker arm brackets are usually attached to the cylinder head with two screws. However, it can also be advantageous to use only one screw, advantageously a cylinder head screw, for fastening a rocker arm bracket.

Die Einspritzventile können unter der Ventilhaube untergebracht sein. Demgegenüber bietet die erfindungsgemäße Anordnung der Einspritzventile nach Anspruch 3 den Vorteil, daß diese ohne Demontage der Ventilhaube zugänglich sind und im Falle eines Bruches der Einspritzleitung keine Schmierölverdünnung eintritt. Außerdem ist keine Durchführung der Einspritzleitung durch die Ventilhaube erforderlich.The injectors can be housed under the valve cover. In contrast, the arrangement according to the invention of the injection valves according to claim 3 has the advantage that they are accessible without dismantling the valve cover and in the event of a break in the injection line, no lubricating oil thinning occurs. In addition, it is not necessary to pass the injection line through the valve cover.

Die erfindungsgemäße Ausbildung des Kipphebelbockes als Rundbolzen stellt eine besonders einfache Lösung dar.The inventive design of the rocker arm bracket as a round pin represents a particularly simple solution.

Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung und der Zeichnung, in der Ausführungsbeispiele der Erfindung schematisch dargestellt sind.Further features of the invention result from the following description and the drawing, in which exemplary embodiments of the invention are shown schematically.

Es zeigen:

Figur 1:
Eine Draufsicht auf den Zylinderkopf der Viertakt-Brennkraftmaschine
Figur 2:
Eine Draufsicht auf den Zylinderkopf der Brennkraftmaschine mit Rundbolzen als Kipphebelböcke
Figur 3:
Einen Schnitt durch den Rundbolzen
Show it:
Figure 1:
A top view of the cylinder head of the four-stroke internal combustion engine
Figure 2:
A top view of the cylinder head of the internal combustion engine with round bolts as rocker arms
Figure 3:
A cut through the round bolt

Die erfindungsgemäße Anordnung nach Figur 1 besteht aus mehreren, in Reihe angeordneten Zylindern 1, auf die ein Zylinderkopf 2, der als Blockkopf ausgebildet ist, mit Zylinderkopfschrauben 3 befestigt ist.The arrangement according to the invention according to FIG. 1 consists of several cylinders 1 arranged in series, onto which a cylinder head 2, which is designed as a block head, is fastened with cylinder head screws 3.

Die Kipphebelböcke 7 sind für je zwei benachbarte Gaswechselventile benachbarter Zylinder zusammengefasst. Die Kipphebelböcke 7 sind mit je zwei Befestigungsschrauben 8 in der Mitte zwischen zwei benachbarten Zylindern 1 an dem Blockkopf befestigt. Sie tragen auf Wellenstummeln 9 die Kipphebel 4, die mit Sicherungsringen 16 axial fixiert sind.The rocker arm brackets 7 are combined for two adjacent gas exchange valves of adjacent cylinders. The rocker arm brackets 7 are fastened to the block head with two fastening screws 8 in the middle between two adjacent cylinders 1. They carry the rocker arms 4 on the shaft ends 9, which are axially fixed with retaining rings 16.

Bei den äußeren Zylindern einer Zylinderreihe ist für das jeweils äußere Ventil ein eigener Kipphebelbock angeordnet.In the outer cylinders of a row of cylinders, a separate rocker arm bracket is arranged for the outer valve.

Zwischen den freien Enden der Wellenstummel 9 ist hinreichend Platz, um die Einspritzventile in der angestrebten steilen und zentralen Lage im Zylinderkopf unterzubringen. Zugleich ist Raum für die Ventilhaube 15 mit der Ventilhaubendichtung 17, die im Bereich des Einspritzventils 18 U-förmig ausgebildet sind. Auf diese Weise ist eine unabhängige Montage von Einspritzdüse 18 und Ventilhaube 15 möglich. Außerdem ist eine Schmierölverdünnung durch undichte oder gebrochene Einspritzleitungen unmöglich gemacht.There is sufficient space between the free ends of the stub shaft 9 to accommodate the injectors in the desired steep and central position in the cylinder head. At the same time there is space for the valve cover 15 with the valve cover seal 17, which are U-shaped in the area of the injection valve 18. In this way it is independent Assembly of injection nozzle 18 and valve cover 15 possible. In addition, dilution of the lubricating oil by leaky or broken injection lines is made impossible.

In der erfindungsgemäßen Ausführung nach Figur 2 ist der Kipphebelbock als Rundbolzen 10 ausgebildet. Da der Rundbolzen 10 aus Stangenmaterial hergestellt werden kann, ergibt sich eine besonders einfache Lösung. Wie aus Bild 3 ersichtlich, liegt der Rundbolzen 10 mit einer Anflächung 13 auf der Deckplatte 6 des Zylinderkopfes 2 auf und wird mit zwei Befestigungsschrauben 8 angeschraubt. Die Deckplatte 6 ist bei der Lösung nach Figur 2 und 3 bis in Höhe des Runbolzens 10 hochgezogen. Sie besitzt Schlitze 11, in die die Seitenflächen 14 der Rundbolzen 10 passen und zur Lagefixierung dieser Rundbolzen dienen.In the embodiment according to FIG. 2, the rocker arm bracket is designed as a round pin 10. Since the round bolt 10 can be made from rod material, a particularly simple solution results. As can be seen in Figure 3, the round bolt 10 lies with a flat 13 on the cover plate 6 of the cylinder head 2 and is screwed on with two fastening screws 8. In the solution according to FIGS. 2 and 3, the cover plate 6 is pulled up to the level of the run bolt 10. It has slots 11 into which the side surfaces 14 of the round bolts 10 fit and serve to fix these round bolts in position.

Außerdem werden die Kipphebel bei dieser Version durch die Schlitze 11 axial fixiert, da die Breite der Schlitze 11 der Breite der Kipphebel 4 im Bereich von deren Lager 12 entspricht. Dadurch können in diesem Falle Sicherungsringe entfallen, was zur weiteren Vereinfachung der Anordnung beiträgt.In addition, the rocker arms in this version are axially fixed by the slots 11, since the width of the slots 11 corresponds to the width of the rocker arms 4 in the region of their bearings 12. In this case, circlips can be omitted, which further simplifies the arrangement.

Claims (5)

  1. A diesel engine comprising:
    - a crankcase with more than one cylinder (1),
    - a camshaft mounted in the crankcase,
    - a cylinder head (2) in the form of a block and with a cover plate (6),
    - an intake and an exhaust valve,
    - two gas-change valves per cylinder, the valves being actuated by rocker arms (4) and covered by a valve bonnet (15), an intake manifold being associated with the intake valve and an exhaust manifold being associated with the exhaust valve in the cylinder head (2),
    - rocker-arm brackets (7) which are secured to the cover plate (8), and trunnions (9) for mounting the rocker arms (4), and
    - a fuel injection valve (18) disposed in the region between the gas-change valves and outside the valve bonnet (15), a common rocker-arm bracket (7) being provided for adjacent rocker arms (4) of adjacent cylinders (1) and secured to the cylinder head (2) between adjacent cylinders (1),
       characterised in that the intake and exhaust valves lie in a plane parallel to the camshaft and parallel to the cylinder axis, the intake and exhaust manifolds are disposed on the side of the cylinder head (2) remote from the camshaft, all the rocker-arm brackets (7) are coaxial with one another and on the same side as the camshaft, and the fuel injection valves (18) are disposed in the region between the rocker-arm brackets (7).
  2. A diesel engine according to claim 1, characterised in that the fuel injection valves (18) are disposed outside the valve bonnet (15) and in U-shaped recesses therein.
  3. A diesel engine according to claim 1 or 2, characterised in that the rocker arm (7) is in the form of a round bolt (10), preferably having the same diameter as the trunnions (9).
  4. A diesel engine according to any of the preceding claims, characterised in that the round bolt is mounted in a matching semicircular milled recess in the cover plate (6) of the cylinder head (2), the cover plate being raised to the level of the round bolt (10), and slots (11) at right angles to the axis of the round bolt (10) are formed at both sides of the semicircular recess in the cover plate (6) and have the same width as the rocker arm (7) in the region of the rocker-arm bearing (12) and have a depth at least sufficient for free passage of the rocker arms (4).
  5. A diesel engine according to any of the preceding claims, characterised in that the round bolt (10) between the trunnions (9) is formed with a flat portion (13) and side surfaces (14), the flat portion (13) resting on a flat surface on the cover plate (6) and the side surfaces (14) being guided in the slots (11).
EP89123764A 1988-12-27 1989-12-22 Rocker arms arrangement in an internal-combustion engine Expired - Lifetime EP0379719B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3843983A DE3843983A1 (en) 1988-12-27 1988-12-27 FOUR-STOCK COMBUSTION ENGINE
DE3843983 1988-12-27

Publications (2)

Publication Number Publication Date
EP0379719A1 EP0379719A1 (en) 1990-08-01
EP0379719B1 true EP0379719B1 (en) 1993-04-07

Family

ID=6370325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123764A Expired - Lifetime EP0379719B1 (en) 1988-12-27 1989-12-22 Rocker arms arrangement in an internal-combustion engine

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EP (1) EP0379719B1 (en)
DE (2) DE3843983A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872630B1 (en) 1997-04-18 2001-06-20 Volkswagen Aktiengesellschaft Bearing for a finger arm of a valve operating device of an internal combustion engine
DE19833531A1 (en) * 1998-07-25 2000-01-27 Audi Ag Cylinder head for stroke piston internal combustion engine involves at least two cylinders in row, each cylinder having at least one inlet and outlet channel evolving from combustion
WO2003058067A1 (en) 2002-01-10 2003-07-17 Interacoustics A/S Piezo electric pump and device with such pump
WO2020227741A1 (en) * 2019-05-10 2020-11-19 Innio Jenbacher Gmbh & Co Og Internal combustion engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532275A (en) * 1939-08-24 1941-01-21 Percy Garibaldi Hugh Improvements in and relating to the cylinder heads of internal combustion engines and the arrangement and operation of the valves therein
DE1936752U (en) * 1964-04-09 1966-04-14 Kloeckner Humboldt Deutz Ag STORAGE OF THE ROCKER ARMS FOR THE VALVE OPERATION OF COMBUSTION ENGINE.
DD113790A1 (en) * 1974-08-09 1975-06-20
IT1024700B (en) * 1974-10-28 1978-07-20 Fiat Spa IMPROVEMENTS IN THE CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINES OF THE DIESEL CYCLE TYPE
DE2809157A1 (en) * 1978-03-03 1979-09-06 Daimler Benz Ag CYLINDER HEAD FOR A MIXED COMPRESSING COMBUSTION MACHINE
DE3680264D1 (en) * 1985-08-08 1991-08-22 Honda Motor Co Ltd DEVICE FOR DRIVING THE FOUR VALVES OF AN INTERNAL COMBUSTION ENGINE WITH AN OVERHEAD CAMSHAFT.
JPS62159762A (en) * 1986-01-08 1987-07-15 Honda Motor Co Ltd diesel engine
DE3601702A1 (en) * 1986-01-22 1987-07-23 Kloeckner Humboldt Deutz Ag Cylinder head for an internal combustion engine

Also Published As

Publication number Publication date
EP0379719A1 (en) 1990-08-01
DE58904023D1 (en) 1993-05-13
DE3843983A1 (en) 1990-06-28

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