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EP0979929B1 - Piston engine with rocker arm valve drive - Google Patents

Piston engine with rocker arm valve drive Download PDF

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Publication number
EP0979929B1
EP0979929B1 EP98811260A EP98811260A EP0979929B1 EP 0979929 B1 EP0979929 B1 EP 0979929B1 EP 98811260 A EP98811260 A EP 98811260A EP 98811260 A EP98811260 A EP 98811260A EP 0979929 B1 EP0979929 B1 EP 0979929B1
Authority
EP
European Patent Office
Prior art keywords
camshaft
reciprocating engine
engine according
cylinder head
crankshaft
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
EP98811260A
Other languages
German (de)
French (fr)
Other versions
EP0979929A3 (en
EP0979929A2 (en
Inventor
Urs Wenger
Hans-Rudolf Jenni
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.)
Wenko AG Burgdorf
Original Assignee
Wenko AG Burgdorf
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
Priority claimed from EP98115057A external-priority patent/EP0979928A1/en
Priority to EP98811260A priority Critical patent/EP0979929B1/en
Application filed by Wenko AG Burgdorf filed Critical Wenko AG Burgdorf
Priority to AU55113/99A priority patent/AU5511399A/en
Priority to US09/762,784 priority patent/US6520133B1/en
Priority to BR9912940-0A priority patent/BR9912940A/en
Priority to PCT/EP1999/005714 priority patent/WO2000009864A1/en
Priority to JP2000565279A priority patent/JP2002522700A/en
Publication of EP0979929A2 publication Critical patent/EP0979929A2/en
Publication of EP0979929A3 publication Critical patent/EP0979929A3/en
Priority to US10/339,722 priority patent/US6951196B2/en
Priority to US10/339,721 priority patent/US20030098002A1/en
Publication of EP0979929B1 publication Critical patent/EP0979929B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F01L1/02—Valve drive
    • 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
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • 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
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • 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
    • 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
    • F01L1/02—Valve drive
    • F01L1/026—Gear drive
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/20—SOHC [Single overhead camshaft]
    • 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 headsĀ 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the present invention describes a reciprocating piston engine with rocker arm valve control according to the generic term of Claim 1.
  • the invention is exemplary a 2-cylinder in-line engine explained in more detail applies for reciprocating engines with any number of cylinders.
  • valve controls e.g. according to Figure 1, the schematically four different valve controls, like them for example in the book Kraftfachtechnisches Taschenbuch Bosch "VDI-Verlag, 19th edition, to be described shows.
  • a possible embodiment is that in Fig. 1, Figure 3, shown rocker arm valve control. That kind of Valve control is used particularly today in engines used where low friction and low Height in the foreground.
  • a disadvantage of this design is the greatly increased effort for editing and Assembly of the valve train, the complex maintenance, as well as a increased space requirement in the longitudinal direction of the cylinders.
  • GB-A-2 157 770 discloses one conventionally on rolls or plain bearing mounted camshaft, the invention this document on a decompression device for a motorcycle is aimed.
  • DE-C-801 241 discloses a rotary adjustable Eccentric bushing around which an axially adjustable and rotatable hub of the rocker arm device engages.
  • FIGS 2 to 5 schematically show parts of the drive a reciprocating piston engine according to the invention, with piston 1, of which only one is shown, which is on the connecting rod 2 attached and via the crank pin 3 with the crankshaft 4th are connected.
  • a balance shaft 5 can be seen with sprocket 5K, one directly with the crankshaft connected chain wheel 6, a chain tensioning wheel 7 to the chain 8 to be able to tension the camshaft sprocket 9 drives, which enables the rotation of the camshaft 10, which in turn actuates the rocker arm 11, which the move indicated valves 19 along the valve axis 12.
  • One in the embodiment as a so-called in-line engine has internal combustion engine shown in reciprocating piston design two parallel cylinders, not shown, in which the pistons 1 run up and down.
  • the one below the cylinder arranged crankshaft 4 has two crank pins 3, each of which a connecting rod 2 is mounted.
  • Each of the connecting rods is connected to a piston 1 in the respective cylinder runs up and down.
  • the camshaft 10 is driven by a Camshaft sprocket 9, which is between the There are pairs of cams for the individual cylinders. in the Embodiment is this camshaft sprocket in the middle of the camshaft, but it can be in another version also offset from the center be arranged.
  • the camshaft 10 is through the timing chain 8 on the Camshaft sprocket 9, the chain tensioning wheel 7, the counter-rotating balance shaft 5 with Balance shaft sprocket 5K and the crankshaft sprocket 6 driven by the crankshaft 4.
  • a further possible execution of the camshaft drive includes a version with toothed belt and Toothed belt wheels instead of chain and chain wheels.
  • Figures 6 and 7 illustrate the installation of the camshaft 10 and the Rocker arm 11 directly into the cast on the cylinder head 24 Recordings 15 and 16. This has the advantage of a very simple editing and a very simple assembly of the Camshaft and the rocker arm.
  • Figures 6 and 7 show only cutouts from the cylinder head 24 and cylinder head cover 14, in which all the organs described are arranged.
  • the assembly is shown below using the example of the camshaft 10 explained in more detail and the advantages listed in detail.
  • the present invention must be the pre-cast Recordings 16 in the cylinder head 24 for the camshaft 10, the is a hollow shaft, only to the desired shaft size be drilled so that those with the inside Roller bearings 20 provided camshaft 10 between the Recorded 16 and the serving as an assembly shaft Camshaft axis 17 can be inserted.
  • the Cylinder head cover 14 with the correspondingly machined Side surfaces 21 are used for lateral fixation of the Camshaft axis 17.
  • rocker arm 11 are also designed as hollow shafts with roller bearings 22 and are placed between the receptacles 15 according to FIG. 7, whereupon the rocker arm axles serving as assembly shafts 13 inserted and through the side surfaces 23 on Cylinder head cover 14 are fixed.
  • An advantage of the invention is therefore a very simple one Machining of the valve train and a very simple assembly the camshaft and the rocker arm.
  • Another advantage of Invention is the use of roller bearings for storage of camshaft and rocker arms, which makes them very low Friction losses are made possible and no pressure oil supply is needed.
  • Another great advantage of the invention is that none additional screw connection or other fastening of Bearing blocks is needed. Due to the special design of the cylinder head cover are no bearings in it needed. In addition, there are no interrupted ones Sealing surfaces between the cylinder head cover and the cylinder head and it becomes a very simple seal on the candle hole allows. Due to the possibility of the cylinder head cover to fix axes 13 and 17 is not necessary further securing the camshaft and the rocker arm required. The invention also makes maintenance like Valve clearance control and setting are significantly simplified and camshafts and rocker arms can be extremely simple be replaced.
  • FIG. 8 shows a variant for the execution of the recordings, in particular the rocker arm shaft receptacles, the cylinder head shown in perspective is. It has been shown that certain models and heavy-duty castings for the Rocker arm shafts do not meet the requirements.
  • the cast receptacles 15 according to Figure 7 can in this Cases according to the embodiment of Figure 8 by recordings 15A steel to be replaced in pairs and on Cylinder head 24 are screwed directly. The remaining Advantages like the cast recordings are complete maintained and the assembly of the rocker arm shafts takes place on the same way.
  • the chain tensioning wheel 7 is in line with the Crankshaft sprocket 6 arranged so that both a sufficiently large wrap angle for all shafts than also a reversal of the direction of rotation for the balancer shaft 5 is achieved.
  • the chain tensioning wheel 7 can be used to reduce the Friction on roller bearings and only on the spray oil the chain must be lubricated sufficiently.
  • This measure of the invention also allows a very simple and compact construction of the valve train.
  • Invention with toothed belt possible.
  • the Sprockets replaced by toothed belt wheels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die vorliegende Erfindung beschreibt einen Hubkolbenmotor mit Kipphebel-Ventilsteuerung gemƤss Oberbegriff von Patentanspruch 1. Dabei wird die Erfindung beispielhaft an einem 2-Zylinder Reihenmotor nƤher erlƤutert, gilt jedoch fĆ¼r Hubkolbenmotoren mit beliebiger Zylinderanzahl.The present invention describes a reciprocating piston engine with rocker arm valve control according to the generic term of Claim 1. The invention is exemplary a 2-cylinder in-line engine explained in more detail applies for reciprocating engines with any number of cylinders.

Es ist vorbekannt, Motoren mit verschiedenen Arten von Ventilsteuerungen zu verwenden, z.B. gemƤss Figur 1, die schematisch vier verschiedene Ventil-Steuerungen, wie sie beispielsweise im Buch Kraftfahrtechnisches Taschenbuch Bosch" VDI-Verlag, 19. Auflage, beschrieben werden, zeigt. Eine mƶgliche AusfĆ¼hrung ist die in Fig. 1, Bild 3, dargestellte Kipphebel-Ventilsteuerung. Diese Art der Ventilsteuerung wird heute insbesondere bei Motoren verwendet, bei denen geringe Reibleistung und eine geringe Bauhƶhe im Vordergrund stehen. Nachteilig an dieser Bauart ist der stark vergrƶsserte Aufwand fĆ¼r die Bearbeitung und Montage des Ventiltriebes, die aufwendige Wartung, sowie ein vergrƶsserter Platzbedarf in der LƤngsrichtung der Zylinder.It is known to use different types of engines To use valve controls, e.g. according to Figure 1, the schematically four different valve controls, like them for example in the book Kraftfachtechnisches Taschenbuch Bosch "VDI-Verlag, 19th edition, to be described shows. A possible embodiment is that in Fig. 1, Figure 3, shown rocker arm valve control. That kind of Valve control is used particularly today in engines used where low friction and low Height in the foreground. A disadvantage of this design is the greatly increased effort for editing and Assembly of the valve train, the complex maintenance, as well as a increased space requirement in the longitudinal direction of the cylinders.

Die GB-A-2 157 770 offenbart eine herkƶmmlich auf Rollen oder Gleitlagern gelagerte Nockenwelle, wobei die Erfindung dieser Schrift auf eine Dekompressionsvorrichtung fĆ¼r ein Motorrad gerichtet ist.GB-A-2 157 770 discloses one conventionally on rolls or plain bearing mounted camshaft, the invention this document on a decompression device for a Motorcycle is aimed.

Die DE-C-801 241 offenbart eine drehverstellbare Exzenterbuchse, um welche eine axial verstellbare und verdrehbare Nabe der Kipphebeleinrichtung greift.DE-C-801 241 discloses a rotary adjustable Eccentric bushing around which an axially adjustable and rotatable hub of the rocker arm device engages.

Aus der US-A-5 605 077 ist ein Hubkolbenmotor bekannt, der fĆ¼r die Aufnahme der Nockenwelle Lagerstellen mit Lagerbohrungen aufweist, die in Montagerichtung gesehen zunehmende Durchmesser aufweisen, um das Einschieben der Nockenwelle zu erleichtern. Die genaue Bearbeitung dieser Lagerbohrungen mit unterschiedlichen Durchmessern ist jedoch sehr aufwendig. Es wird auch die Lagerung der Kipphebel bei den gleichen Lagerstellen offenbart, wobei die Lagerstellen an den Stellen der Kipphebelbohrungen verbreitert sind. Dadurch, dass die Kipphebelbohrungen im Zylinderblock angeordnet sind, kann die Montage der Kipphebel nur im Zylinderkopf erfolgen.From US-A-5 605 077 a reciprocating piston engine is known for mounting the camshaft bearing points with Has bearing holes seen in the mounting direction have increasing diameter to insert the Lighten camshaft. The exact editing of this Bearing holes with different diameters is, however very complex. There will also be storage of the rocker arms the same bearings disclosed, the bearings are widened at the positions of the rocker arm holes. Because the rocker arm holes in the cylinder block are arranged, the assembly of the rocker arm only in Cylinder head.

Es ist von diesem bekannten Stand der Technik ausgehend Aufgabe der vorliegenden Erfindung, die Nachteile von vorbekannten Kipphebel-Ventilsteuerungen bezĆ¼glich stark vergrƶssertem Aufwand fĆ¼r Bearbeitung und Montage der Nockenwelle und der Kipphebel, aufwendige Wartung und vergrƶsserten Platzbedarf in der LƤngsrichtung der Zylinder, zu beseitigen.It is based on this known prior art Object of the present invention, the disadvantages of previously known rocker arm valve controls regarding strong increased effort for processing and assembly of the Camshaft and the rocker arm, complex maintenance and increased space requirement in the longitudinal direction of the cylinders, to eliminate.

Diese Aufgabe wird mit einem Motor mit Kippventil-Steuerung gemƤss Patentanspruch 1 gelƶst. Weitere Vorteile und AusfĆ¼hrungen sind in den abhƤngigen AnsprĆ¼chen beschrieben. This task is done with a motor with tilt valve control solved according to claim 1. Other advantages and Embodiments are described in the dependent claims.

Die Erfindung wird im folgenden anhand einer Zeichnung von Lƶsungen des Standes der Technik und anhand eines AusfĆ¼hrungsbeispiels mit einem 2-Zylinder Reihenmotor nƤher erlƤutert.

Fig. 1
zeigt schematisch vier Mƶglichkeiten von Ventilsteuerungen,
Fig. 2
zeigt schematisch in einer Seitenansicht einen Ventiltrieb eines Motors gemƤss Erfindung,
Fig. 3
zeigt einen Schnitt gemƤss Linie III-III in Fig. 2,
Fig. 4
zeigt die Kipphebelanordnung der Figuren 2 und 3 von oben,
Fig. 5
zeigt die Kurbelwelle und Ausgleichswelle von Fig. 2 von oben,
Fig. 6
zeigt schematisch einen ersten Schnitt durch das ZylinderkopfgehƤuse,
Fig. 7
zeigt einen weiteren Schnitt durch das ZylinderkopfgehƤuse, und
Fig. 8
zeigt in perspektivischer Sicht eine Variante zur AusfĆ¼hrung gemƤss Figur 7.
The invention is explained in more detail below on the basis of a drawing of solutions of the prior art and on the basis of an exemplary embodiment with a 2-cylinder in-line engine.
Fig. 1
shows schematically four possibilities of valve controls,
Fig. 2
shows schematically in a side view a valve train of an engine according to the invention,
Fig. 3
shows a section along line III-III in Fig. 2,
Fig. 4
shows the rocker arm arrangement of Figures 2 and 3 from above,
Fig. 5
shows the crankshaft and balance shaft of Fig. 2 from above,
Fig. 6
schematically shows a first section through the cylinder head housing,
Fig. 7
shows a further section through the cylinder head housing, and
Fig. 8
shows a perspective view of a variant of the embodiment according to FIG. 7.

Die Figuren 2 bis 5 zeigen schematisch Teile des Antriebs eines Hubkolbenmotors gemƤss Erfindung, mit Kolben 1, wovon nur einer dargestellt ist, die an der Pleuelstange 2 befestigt und Ć¼ber die Kurbelzapfen 3 mit der Kurbelwelle 4 verbunden sind. Ausserdem erkennt man eine Ausgleichswelle 5 mit Kettenzahnrad 5K, ein direkt mit der Kurbelwelle verbundenes Kettenrad 6, ein Kettenspannrad 7, um die Kette 8 spannen zu kƶnnen, die das Nockenwellen-Kettenzahnrad 9 antreibt, welches die Drehung der Nockenwelle 10 ermƶglicht, die ihrerseits die Kipphebel 11 betƤtigt, die die angedeuteten Ventile 19 entlang der Ventilachse 12 bewegen.Figures 2 to 5 schematically show parts of the drive a reciprocating piston engine according to the invention, with piston 1, of which only one is shown, which is on the connecting rod 2 attached and via the crank pin 3 with the crankshaft 4th are connected. In addition, a balance shaft 5 can be seen with sprocket 5K, one directly with the crankshaft connected chain wheel 6, a chain tensioning wheel 7 to the chain 8 to be able to tension the camshaft sprocket 9 drives, which enables the rotation of the camshaft 10, which in turn actuates the rocker arm 11, which the move indicated valves 19 along the valve axis 12.

Eine im AusfĆ¼hrungsbeispiel als sogenannter Reihenmotor dargestellte Brennkraftmaschine in Hubkolbenbauform besitzt zwei parallel stehende, nicht gezeigte Zylinder in welchen die Kolben 1 auf und ab laufen. Die unterhalb der Zylinder angeordnete Kurbelwelle 4 besitzt zwei Kurbelzapfen 3, auf denen jeweils ein Pleuel 2 gelagert ist. Jeder der Pleuel ist mit einem Kolben 1 verbunden, der im jeweiligen Zylinder auf und ab lƤuft. Oberhalb der Zylinder ist eine Nockenwelle 10 angeordnet. Die Nocken 18 der Nockenwelle 10 betƤtigen dabei die Kipphebel 11, die mit den jeweils entsprechenden Ventilen 19 zusammenwirken.One in the embodiment as a so-called in-line engine has internal combustion engine shown in reciprocating piston design two parallel cylinders, not shown, in which the pistons 1 run up and down. The one below the cylinder arranged crankshaft 4 has two crank pins 3, each of which a connecting rod 2 is mounted. Each of the connecting rods is connected to a piston 1 in the respective cylinder runs up and down. There is a camshaft above the cylinders 10 arranged. Operate the cams 18 of the camshaft 10 thereby the rocker arm 11, which with the respective corresponding Valves 19 cooperate.

Der Antrieb der Nockenwelle 10 erfolgt durch ein Nockenwellen-Kettenzahnrad 9, das sich zwischen den Nockenpaaren fĆ¼r die einzelnen Zylinder befindet. Im AusfĆ¼hrungsbeispiel ist dieses Nockenwellen-Kettenzahnrad in der Mitte der Nockenwelle angeordnet, es kann jedoch in einer anderen AusfĆ¼hrung auch aus der Mitte versetzt angeordnet sein.The camshaft 10 is driven by a Camshaft sprocket 9, which is between the There are pairs of cams for the individual cylinders. in the Embodiment is this camshaft sprocket in the middle of the camshaft, but it can be in another version also offset from the center be arranged.

Die Nockenwelle 10 wird durch die Steuerkette 8 Ć¼ber das Nockenwellen-Kettenzahnrad 9, das Kettenspannrad 7, die gegenlƤufig rotierende Ausgleichswelle 5 mit Ausgleichswellen-Kettenzahnrad 5K und das Kurbelwellen-Kettenzahnrad 6 von der Kurbelwelle 4 angetrieben. Eine weitere mƶgliche AusfĆ¼hrung des Nockenwellenantriebes beinhaltet eine AusfĆ¼hrung mit Zahnriemen und ZahnriemenrƤdern anstelle von Kette und KettenrƤdern.The camshaft 10 is through the timing chain 8 on the Camshaft sprocket 9, the chain tensioning wheel 7, the counter-rotating balance shaft 5 with Balance shaft sprocket 5K and the crankshaft sprocket 6 driven by the crankshaft 4. A further possible execution of the camshaft drive includes a version with toothed belt and Toothed belt wheels instead of chain and chain wheels.

Die in den Figuren 6 und 7 dargestellten Schnitte veranschaulichen den Einbau der Nockenwelle 10 und der Kipphebel 11 direkt in die am Zylinderkopf 24 angegossenen Aufnahmen 15 und 16. Dies hat den Vorteil einer sehr einfachen Bearbeitung und einer sehr einfachen Montage der Nockenwelle und der Kipphebel. Die Figuren 6 und 7 zeigen nur Ausschnitte aus dem Zylinderkopf 24 und Zylinderkopf-Deckel 14, in dem alle beschriebenen Organe angeordnet sind.The sections shown in Figures 6 and 7 illustrate the installation of the camshaft 10 and the Rocker arm 11 directly into the cast on the cylinder head 24 Recordings 15 and 16. This has the advantage of a very simple editing and a very simple assembly of the Camshaft and the rocker arm. Figures 6 and 7 show only cutouts from the cylinder head 24 and cylinder head cover 14, in which all the organs described are arranged.

Am Beispiel der Nockenwelle 10 wird nachfolgend die Montage nƤher erlƤutert und die Vorteile detailliert aufgefĆ¼hrt. Bei der vorliegenden Erfindung mĆ¼ssen die vorgegossenen Aufnahmen 16 im Zylinderkopf 24 fĆ¼r die Nockenwelle 10, die eine Hohlwelle ist, nur noch auf das gewĆ¼nschte Wellenmass gebohrt werden, so dass die mit den innen liegenden Rollenlagern 20 versehene Nockenwelle 10 zwischen die Aufnahmen 16 gelegt und die als Montagewelle dienende Nockenwellen-Achse 17 eingeschoben werden kann. Der Zylinderkopfdeckel 14 mit den entsprechend bearbeiteten SeitenflƤchen 21 dient dabei der seitlichen Fixierung der Nockenwellen-Achse 17.The assembly is shown below using the example of the camshaft 10 explained in more detail and the advantages listed in detail. at of the present invention must be the pre-cast Recordings 16 in the cylinder head 24 for the camshaft 10, the is a hollow shaft, only to the desired shaft size be drilled so that those with the inside Roller bearings 20 provided camshaft 10 between the Recorded 16 and the serving as an assembly shaft Camshaft axis 17 can be inserted. The Cylinder head cover 14 with the correspondingly machined Side surfaces 21 are used for lateral fixation of the Camshaft axis 17.

SinngemƤss trifft dies auch auf die Kipphebel 11 zu, die ebenfalls als Hohlwellen mit Rollenlager 22 ausgebildet sind und gemƤss Figur 7 zwischen die Aufnahmen 15 gelegt werden, woraufhin die als Montagewellen dienenden Kipphebel-Achsen 13 eingeschoben und durch die SeitenflƤchen 23 am Zylinderkopfdeckel 14 fixiert werden. Analogously, this also applies to the rocker arm 11, the are also designed as hollow shafts with roller bearings 22 and are placed between the receptacles 15 according to FIG. 7, whereupon the rocker arm axles serving as assembly shafts 13 inserted and through the side surfaces 23 on Cylinder head cover 14 are fixed.

Ein Vorteil der Erfindung ist somit eine sehr einfache Bearbeitung des Ventiltriebs und eine sehr einfache Montage der Nockenwelle und der Kipphebel. Ein weiterer Vorteil der Erfindung ist die Verwendung von Rollenlagern zur Lagerung von Nockenwelle und Kipphebeln, wodurch sehr niedrige Reibverluste ermƶglicht werden und keine Druckƶlversorgung benƶtigt wird.An advantage of the invention is therefore a very simple one Machining of the valve train and a very simple assembly the camshaft and the rocker arm. Another advantage of Invention is the use of roller bearings for storage of camshaft and rocker arms, which makes them very low Friction losses are made possible and no pressure oil supply is needed.

Ein weiterer grosser Vorteil der Erfindung ist, dass keine zusƤtzliche Verschraubung oder andersartige Befestigung von Lagerbƶcken benƶtigt wird. Durch die spezielle AusfĆ¼hrung des Zylinderkopfdeckels werden darin keine Lagerstellen benƶtigt. Ausserdem ergeben sich keine unterbrochenen DichtflƤchen zwischen Zylinderkopfdeckel und Zylinderkopf und es wird eine sehr einfache Abdichtung des Kerzenlochs ermƶglicht. Durch die Mƶglichkeit, den Zylinderkopfdeckel zur Fixierung der Achsen 13 und 17 zu verwenden, ist keine weitere Sicherung der Nockenwelle und der Kipphebel erforderlich. Durch die Erfindung wird auch die Wartung wie Ventilspielkontrolle und Einstellung deutlich vereinfacht und Nockenwellen und Kipphebel kƶnnen extrem einfach ausgetauscht werden.Another great advantage of the invention is that none additional screw connection or other fastening of Bearing blocks is needed. Due to the special design of the cylinder head cover are no bearings in it needed. In addition, there are no interrupted ones Sealing surfaces between the cylinder head cover and the cylinder head and it becomes a very simple seal on the candle hole allows. Due to the possibility of the cylinder head cover to fix axes 13 and 17 is not necessary further securing the camshaft and the rocker arm required. The invention also makes maintenance like Valve clearance control and setting are significantly simplified and camshafts and rocker arms can be extremely simple be replaced.

In Figur 8 ist eine Variante zur AusfĆ¼hrung der Aufnahmen, insbesondere der Kipphebelwelle-Aufnahmen, dargestellt, wobei der Zylinderkopf in perspektivischer Sicht dargestellt ist. Es hat sich gezeigt, dass bei gewissen Modellen und grossen Beanspruchungen gegossene Aufnahmen fĆ¼r die Kipphebelwellen den Anforderungen nicht genĆ¼gen. Die gegossenen Aufnahmen 15 gemƤss Figur 7 kƶnnen in diesen FƤllen gemƤss der AusfĆ¼hrung nach Figur 8 durch Aufnahmen 15A aus Stahl ersetzt werden, die paarweise und am Zylinderkopf 24 direkt angeschraubt werden. Die Ć¼brigen Vorteile wie bei den gegossenen Aufnahmen werden vollstƤndig beibehalten und die Montage der Kipphebelwellen erfolgt auf dem gleichen Weg.8 shows a variant for the execution of the recordings, in particular the rocker arm shaft receptacles, the cylinder head shown in perspective is. It has been shown that certain models and heavy-duty castings for the Rocker arm shafts do not meet the requirements. The cast receptacles 15 according to Figure 7 can in this Cases according to the embodiment of Figure 8 by recordings 15A steel to be replaced in pairs and on Cylinder head 24 are screwed directly. The remaining Advantages like the cast recordings are complete maintained and the assembly of the rocker arm shafts takes place on the same way.

Falls erforderlich, kƶnnen auch die gegossenen Nockenwellen-Aufnahmen 16 durch vorgefertigte Aufnahmen ersetzt werden, die dann auf den Zylinderkopf angeschraubt werden.If necessary, you can also use the cast camshaft mountings 16 to be replaced by pre-made recordings, which are then screwed onto the cylinder head.

Es hat sich ferner herausgestellt, dass die Verwendung von Aufnahmen, sei es gegossene oder vorgefertigte und angeschraubte Aufnahmen auch bei der Lagerung vorbekannter Nockenwellen oder Kipphebel wesentliche Vorteile und Einsparungen bringt. Analog dazu hat es sich ergeben, dass die Verwendung von Hohlwellen fĆ¼r die Lagerung von Nockenwellen und Kipphebel auch bei vorbekannten Anordnungen Vorteile bietet.It has also been found that the use of Recordings, be it cast or prefabricated and screwed recordings also in the storage of previously known Essential advantages and camshafts or rocker arms Brings savings. Similarly, it has been found that the use of hollow shafts for the storage of Camshafts and rocker arms also in known arrangements Offers advantages.

Insbesondere aus Figur 3 geht hervor, dass die Nockenwelle 10, das Kettenspannrad 7 und die gegenlƤufig rotierende Ausgleichswelle 5 mit dem Kettenzahnrad 5K von nur einer Kette 8 in Linie mit der Kurbelwelle 4 mit Kettenzahnrad 6 von dieser angetrieben wird. Das hat den Vorteil, durch die sehr kompakte Bauweise sehr schmal bauen zu kƶnnen und ermƶglicht, zusƤtzliche Bauteile wie z.B. Zwischenwellen einzusparen. Diese KettenfĆ¼hrung ermƶglicht auch durch die Anordnung des Kettenspannrades 7 eine Drehrichtungsumkehr der Ausgleichswelle 5 und einen genĆ¼gend grossen Umschlingungswinkel aller treibenden und getriebenen Bauteile. Dabei wird das Kettenspannrad 7 in Linie mit dem Kurbelwellen-Kettenzahnrad 6 so angeordnet, dass sowohl ein genĆ¼gend grosser Umschlingungswinkel fĆ¼r alle Wellen, als auch eine Drehrichtungsumkehr fĆ¼r die Ausgleichswelle 5 erreicht wird. Das Kettenspannrad 7 kann zur Reduzierung der Reibung rollengelagert sein und dabei nur Ć¼ber das Spritzƶl der Kette genĆ¼gend geschmiert werden.It can be seen in particular from FIG. 3 that the camshaft 10, the chain tensioning wheel 7 and the counter-rotating Balance shaft 5 with the sprocket 5K of only one Chain 8 in line with crankshaft 4 with sprocket 6 is driven by this. That has the advantage of very compact design to be able to build very narrow and enables additional components such as intermediate shafts save. This chain guide also enables through the Arrangement of the chain tensioning wheel 7 reverses the direction of rotation the balance shaft 5 and a sufficiently large one Wrap angle of all driving and driven Components. The chain tensioning wheel 7 is in line with the Crankshaft sprocket 6 arranged so that both a sufficiently large wrap angle for all shafts than also a reversal of the direction of rotation for the balancer shaft 5 is achieved. The chain tensioning wheel 7 can be used to reduce the Friction on roller bearings and only on the spray oil the chain must be lubricated sufficiently.

Auch diese Massnahme der Erfindung ermƶglicht einen sehr einfachen und kompakten Aufbau des Ventiltriebs. Neben einer AusfĆ¼hrung mit Kettentrieb, ist auch eine AusfĆ¼hrung der Erfindung mit Zahnriemen mƶglich. Dabei werden die KettenrƤder durch ZahnriemenrƤder ersetzt.This measure of the invention also allows a very simple and compact construction of the valve train. In addition to one Version with chain drive is also a version of the Invention with toothed belt possible. The Sprockets replaced by toothed belt wheels.

Claims (10)

  1. Reciprocating engine having at least one cylinder and using a rocker valve gear, comprising pistons (1) that are fastened to a connecting rod (2) and connected by crank pins (3) to a crankshaft (4), as well as a balancer shaft (5) and a camshaft (10) that is driven by the crankshaft (4) and in turn actuates rockers (11), these elements being arranged in a crankcase having a cylinder head (24) and cylinder head cover (14), characterized in that the cylinder head is provided with seats (16) that are directly fastened therein and serve for the attachment of a nonrotating camshaft axle (17).
  2. Reciprocating engine according to claim 1, characterised in that the cylinder head (24) comprises seats (15A) that are prefabricated from steel and screwed thereto for the attachment of a nonrotating rocker axle (13).
  3. Reciprocating engine according to claim 1 or 2, characterised in that the camshaft (10) and/or the rockers (11) is/are hollow and comprise(s) internally disposed bearings (20, 22) and is/are supported on an additional, nonrotating axle or on axles (17, 13) that is/are inserted into the camshaft (10) resp. into the rockers (11).
  4. Reciprocating engine according to claim 3, characterised in that the camshaft resp. rocker bearings (20, 22) are roller or plain bearings.
  5. Reciprocating engine according to claim 1, characterised in that the seats (16) are cast integrally with the cylinder head (24).
  6. Reciprocating engine according to one of claims 1 to 5, characterised in that the cylinder head cover (14) comprises lateral surfaces (21) for positioning and maintaining the camshaft (10) and the associated camshaft axle (17).
  7. Reciprocating engine according to one of claims 1 to 6, characterised in that the cylinder head cover (14) comprises lateral surfaces (23) for positioning and maintaining the rockers (11) and the associated rocker axles (13).
  8. Reciprocating engine according to one of claims 1 to 7, the rotation of the camshaft (10) being effected by movable driving means (8) which are driven by a driving wheel (6) that is directly connected to the crankshaft, and which include a tensioning wheel (7) for tensioning the driving means (8), characterized in that the camshaft (10), the tensioning wheel (7), and the counter-rotating balancer shaft (5) are driven by the crankshaft (4) through a single chain (8) or a single toothed belt arranged in line with the crankshaft.
  9. Reciprocating engine according to claim 8, characterised in that the tensioning wheel (7) arranged in line with the crankshaft wheel (6) is disposed such that both a sufficient angle of contact for all shafts and a reversal of the rotating direction of the balancer shaft (5) are obtained.
  10. Reciprocating engine according to claim 8, characterised in that the tensioning wheel (7) is supported on roller bearings for reduced friction and sufficiently lubricated by splash oil of the chain.
EP98811260A 1998-08-11 1998-12-23 Piston engine with rocker arm valve drive Expired - Lifetime EP0979929B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP98811260A EP0979929B1 (en) 1998-08-11 1998-12-23 Piston engine with rocker arm valve drive
AU55113/99A AU5511399A (en) 1998-08-11 1999-08-06 Reciprocating engine with rocker-arm valve control
US09/762,784 US6520133B1 (en) 1998-08-11 1999-08-06 Reciprocating engine with rocker-arm valve control
BR9912940-0A BR9912940A (en) 1998-08-11 1999-08-06 Lifting piston motor with rocker valve control
PCT/EP1999/005714 WO2000009864A1 (en) 1998-08-11 1999-08-06 Reciprocating engine with rocker-arm valve control
JP2000565279A JP2002522700A (en) 1998-08-11 1999-08-06 Reciprocating engine with rocker valve device
US10/339,722 US6951196B2 (en) 1998-08-11 2003-01-09 Reciprocating engine with rocker valve gear
US10/339,721 US20030098002A1 (en) 1998-08-11 2003-01-09 Reciprocating engine with rocker valve gear

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98115057A EP0979928A1 (en) 1998-08-11 1998-08-11 Internal combustion engine with rocker operated valve drive
EP98115057 1998-08-11
EP98811260A EP0979929B1 (en) 1998-08-11 1998-12-23 Piston engine with rocker arm valve drive

Publications (3)

Publication Number Publication Date
EP0979929A2 EP0979929A2 (en) 2000-02-16
EP0979929A3 EP0979929A3 (en) 2000-09-06
EP0979929B1 true EP0979929B1 (en) 2004-12-15

Family

ID=26149522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811260A Expired - Lifetime EP0979929B1 (en) 1998-08-11 1998-12-23 Piston engine with rocker arm valve drive

Country Status (6)

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US (3) US6520133B1 (en)
EP (1) EP0979929B1 (en)
JP (1) JP2002522700A (en)
AU (1) AU5511399A (en)
BR (1) BR9912940A (en)
WO (1) WO2000009864A1 (en)

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Also Published As

Publication number Publication date
JP2002522700A (en) 2002-07-23
US20030098002A1 (en) 2003-05-29
WO2000009864A1 (en) 2000-02-24
US6951196B2 (en) 2005-10-04
EP0979929A3 (en) 2000-09-06
US20030098003A1 (en) 2003-05-29
BR9912940A (en) 2001-05-08
US6520133B1 (en) 2003-02-18
AU5511399A (en) 2000-03-06
EP0979929A2 (en) 2000-02-16

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