EP1249582A2 - Internal combustion engine with at least two over head cam shafts - Google Patents

Internal combustion engine with at least two over head cam shafts Download PDF

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Publication number
EP1249582A2
EP1249582A2 EP02006171A EP02006171A EP1249582A2 EP 1249582 A2 EP1249582 A2 EP 1249582A2 EP 02006171 A EP02006171 A EP 02006171A EP 02006171 A EP02006171 A EP 02006171A EP 1249582 A2 EP1249582 A2 EP 1249582A2
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
cylinder head
control valves
camshafts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02006171A
Other languages
German (de)
French (fr)
Other versions
EP1249582B1 (en
EP1249582A3 (en
Inventor
Joachim Dietz
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.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
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 INA Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1249582A2 publication Critical patent/EP1249582A2/en
Publication of EP1249582A3 publication Critical patent/EP1249582A3/en
Application granted granted Critical
Publication of EP1249582B1 publication Critical patent/EP1249582B1/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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L2001/028—Pre-assembled timing arrangement, e.g. located in a cassette
    • 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
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control valves
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34489—Two phasers on one camshaft
    • 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
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the invention relates to an internal combustion engine with at least two in their Cylinder head arranged side by side according to the characteristics of the preamble of claim 1, and it is particularly advantageous Internal combustion engines can be realized with an intake and an exhaust camshaft.
  • Such an internal combustion engine is generic from EP 0 945 598 A2 previously known.
  • this internal combustion engine are in a special embodiment each in a radial bearing in the cylinder head of the internal combustion engine supported ends of both camshafts, each with a device to vary the timing of the gas exchange valves of the internal combustion engine connected, each of which via a traction means with the crankshaft
  • an output unit connected to the respective camshaft.
  • the supply and discharge of the hydraulic pressure medium to and from the pressure chambers of both devices is separate for each device by an electromagnetic Control valve regulated, which via the radial bearing of the respective Camshaft and via corresponding pressure medium channels in this and in Cylinder head of the internal combustion engine with the pressure chambers of the device in Fluid connection is established.
  • Each of these electromagnetic control valves is made usually from an electromagnet with an electrical end face Plug contact and from a cartridge connected to the electromagnet, which in the known solution is designed as a valve seat Hole is insertable, each in the vicinity of the radial bearing of the camshafts into the cylinder head walls of the internal combustion engine running parallel to this is incorporated and for space-saving arrangement of the control valves runs obliquely to the crankcase of the internal combustion engine.
  • a disadvantage of this known internal combustion engine is that electromagnetic control valves for the devices for varying the Valve timing despite their oblique arrangement on the long sides of the cylinder head walls an enlarged installation space for the internal combustion engine in the vehicle that is not always available or only through elaborate rearrangement of the subordinate units of the internal combustion engine must be created.
  • the electromagnets are the Control valves and their electrical plug contacts through their unprotected Arrangement on the internal combustion engine an increased risk of contamination exposed to long-term malfunction or failure of the electromagnetic Control valves and thus the failure of the devices for Varying the valve timing of the internal combustion engine can result.
  • the invention is therefore based on the object of an internal combustion engine with at least two cam shafts arranged side by side in their cylinder head, especially with an intake and an exhaust camshaft conceive which by a space-saving arrangement of the electromagnetic Control valves for the device for varying the valve timing requires only a minimum of installation space in the vehicle and is simple Measures to largely avoid pollution-related failures of the electromagnetic control valves.
  • this object is achieved in an internal combustion engine
  • Preamble of claim 1 solved in that the valve seats of Control valves as separate flange brackets with an insertion hole are formed, which are directly above the radial bearing of the camshafts are attached to the cylinder head of the internal combustion engine such that the Control valves with their cartridges pointing away from each other and with their electromagnets directly opposite on a common, across the longitudinal axes of the camshafts extending longitudinal axis side by side are arranged, the electrical plug contacts of the electromagnet via an extension from each other which runs parallel to the end faces thereof destructive next to the electromagnets parallel to the longitudinal axis of the Control valves are arranged.
  • valve receptacles of the control valves preferred have a trapezoidal profile cross-section and are the larger of their two Parallel surfaces on a flat counter surface, preferably on the Screwed cylinder head of the internal combustion engine mountable cylinder head cover.
  • the larger parallel surfaces of the valve seats in addition, several mounting flanges for threaded screws are formed, in corresponding threaded holes in the counter surface of the cylinder head cover are screwable.
  • the trapezoidal profile cross section of the Valve mounts has proven to be space and weight saving most advantageously proven, but can also be by another suitable one Profile cross-section, for example through a semicircular or a rectangular profile cross-section to be replaced.
  • each one half of the bearing in a known manner mostly two-part radial bearing of the camshafts in the cylinder head cover is integrated and in the cylinder head cover and in the Integrated valve lines with the insertion hole connected in the valve seat arranged above the radial bearing is.
  • Starting from the insertion holes for the control valves in the valve seats takes place via these pressure medium lines and the radial bearings the camshafts and the pressure medium channels arranged in them Supply and discharge of the hydraulic pressure medium to and from the pressure chambers of the devices for varying the valve timing.
  • these plug contacts are preferably at a distance from the To arrange outer surfaces of the electromagnets that these outer surfaces as Guide surfaces can be used when installing the cable connector.
  • the distance of the plug contacts to the outer surfaces of the electromagnets roughly corresponds to the thickness of the cable connector housing, making it with manual assembly of the cable connector even without direct visual contact is possible by placing the cable connector on the outer surface of the electromagnet and then linearly moving the cable connector along the lateral surfaces a secure plug connection between the cable plugs and to produce the electrical plug contacts of the electromagnets.
  • the internal combustion engine designed according to the invention with at least two in whose cylinder head arranged side by side camshafts, in particular with an intake and an exhaust camshaft, thus faces the Internal combustion engines known from the prior art have the advantage that through the space-saving arrangement of the electromagnetic control valves no changes for the devices for varying the valve timing of the installation space of the internal combustion engine or a rearrangement of the secondary units of the internal combustion engine is more necessary.
  • the Arrangement of the electromagnetic control valves in separate, as flange brackets trained valve receptacles on the cylinder head of the internal combustion engine also has the advantage that this is the service of Internal combustion engine are easily accessible and cleaned in the simplest way or can be exchanged.
  • These devices 8, 9 are in the embodiment shown as so-called rotary piston adjuster, the drive unit 11, 12 by a hollow cylindrical stator with a plurality of radial boundary walls and their output unit 13, 14 by a rotor with several blades is formed.
  • these devices 8, 9 are between the drive unit 11, 12 and the output unit 13, 14 several against each other acting as well as optionally or simultaneously with a hydraulic pressure medium pressurizable pressure chambers formed by the blades of the rotor in protrude the space between the radial boundary walls of the stator and divide them into two pressure chambers.
  • valve receptacles 19, 20 of the control valves 15, 16 according to the invention as separate flange brackets are formed with an insertion hole 29, 30, which is directly above the radial bearing 2, 3 of the camshafts 4, 5 on the cylinder head 1 the internal combustion engine are attached that the control valves 15, 16 with their Cartridge 21, 22 pointing away from each other and with their electromagnets 23, 24 directly opposite each other on a common, transverse to the Longitudinal axes of the camshafts 4, 5 running longitudinal axis side by side are arranged.
  • the plug contacts 27, 28 of the electromagnet 23, 24 also according to the invention in each case parallel to the end faces 25, 26 extending extension 31, 32 pointing away from each other in addition to the electromagnets 23, 24 and parallel to the longitudinal axis of the Control valves 15, 16 arranged. It is particularly clear from FIG. 2 that the extensions 31, 32 of the plug contacts 27, 28 for further space-saving Arrangement of the control valves 15, 16 in the direction of the devices 8, 9 have pivoted position through which the plug contacts 27, 28 in a horizontal plane between the devices 8, 9 and Electromagnets 23, 24 of the control valves 15, 16 are arranged.
  • the result difficult accessibility of the plug contacts 27, 28 is thereby Measure remedied that the plug contacts 27, 28 at a distance the lateral surfaces 42, 43 of the electromagnets 23, 24 are arranged, the corresponds approximately to the thickness of the housing of the cable connector to be installed, so that the outer surfaces 42, 43 as guide surfaces in the manufacture of the Plug connection between the cable plug and the plug contacts 27, 28 are usable.
  • FIGS. 1 and 2 show that the valve receptacles 19, 20, which are designed as flange brackets, take up a lot of space have weight-saving, trapezoidal profile cross-section and with the larger of its two parallel surfaces 33, 34 on a flat counter surface 35, 36 are screwed, in the embodiment shown on one the cylinder head 1 attachable cylinder head cover 37 is located. In this As indicated in FIG.
  • cylinder head cover 37 is in each case one half of the bearing 38, 39 of the radial bearings 2, 3 of the camshafts 4, 5 integrated, which in the Cylinder head cover 37 and incorporated in the valve seats 19, 20 Pressure medium lines 40, 40 ', 41, 41' with the respective insertion bore 29, 30 the valve receptacle 19, 20 arranged above the radial bearing 2, 3 is connected is.
  • pressure medium lines 40, 40 ', 41, 41' are essentially as of the insertion bore 29, 30 of each valve receptacle 19, 20 outgoing bores formed through the cylinder head cover 37, which in corresponding, Ring channels, not specified, open into the camshafts 4, 5 and with the pressure medium channels leading to the pressure chambers of the devices 8, 9 17, 17 'and 18, 18' are connected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The internal combustion engine has at least 2 overhead camshafts (4,5), especially for inlet and exhaust valves. Holders (19,20) for control valves (15,16) are in the form of separate flange holders with an insertion bore on the cylinder head directly above the radial bearing for the camshaft. The control valves are arranged adjacent to each other with their cartridges facing away from each other and electromagnets (23,24) facing on a common axis.

Description

Gebiet der ErfindungField of the Invention

Die Erfindung betrifft eine Brennkraftmaschine mit zumindest zwei in deren Zylinderkopf nebeneinander angeordneten Nockenwellen nach den Merkmalen des Oberbegriffs des Anspruchs 1, und sie ist insbesondere vorteilhaft an Brennkraftmaschinen mit einer Einlass- und einer Auslassnockenwelle realisierbar.The invention relates to an internal combustion engine with at least two in their Cylinder head arranged side by side according to the characteristics of the preamble of claim 1, and it is particularly advantageous Internal combustion engines can be realized with an intake and an exhaust camshaft.

Hintergrund der ErfindungBackground of the Invention

Eine derartige Brennkraftmaschine ist gattungsbildend aus der EP 0 945 598 A2 vorbekannt. Bei dieser Brennkraftmaschine sind in einer speziellen Ausführungsform die in jeweils einem Radiallager im Zylinderkopf der Brennkraftmaschine gelagerten Enden beider Nockenwellen mit jeweils einer Vorrichtung zum Variieren der Steuerzeiten der Gaswechselventile der Brennkraftmaschine verbunden, welche jeweils aus einer über ein Zugmittel mit der Kurbelwelle der Brennkraftmaschine in Antriebsverbindung stehenden Antriebseinheit und aus einer mit der jeweiligen Nockenwelle verbundenen Abtriebseinheit besteht. Zwischen der Antriebseinheit und der Abtriebseinheit jeder Vorrichtung werden dabei in bekannter Weise mindestens zwei gegeneinander wirkende hydraulische Druckkammern gebildet, die wahlweise oder gleichzeitig mit einem hydraulischen Druckmittel beaufschlagbar sind und somit eine Relativverdrehung oder eine hydraulische Einspannung der jeweiligen Nockenwelle gegenüber der Kurbelwelle der Brennkraftmaschine bewirken. Die Zu- und Abführung des hydraulischen Druckmittels zu und von den Druckkammern beider Vorrichtungen wird dabei für jede Vorrichtung gesondert durch jeweils ein elektromagnetisches Steuerventil geregelt, welches über das Radiallager der jeweiligen Nockenwelle sowie über entsprechende Druckmittelkanäle in dieser und im Zylinderkopf der Brennkraftmaschine mit den Druckkammern der Vorrichtung in Fluidverbindung steht. Jedes dieser elektromagnetischen Steuerventile besteht üblicherweise aus einem Elektromagneten mit einem stirnseitigen elektrischen Steckkontakt und aus einem mit dem Elektromagneten verbundenen Cartridge, welches bei der bekannten Lösung in eine als Ventilaufnahme ausgebildete Bohrung einsteckbar ist, die jeweils in der Nähe der Radiallager der Nockenwellen in die parallel zu diesem verlaufenden Zylinderkopfwände der Brennkraftmaschine eingearbeitet ist und zur platzsparenden Anordnung der Steuerventile schräg zum Kurbelgehäuse der Brennkraftmaschine hin verläuft.Such an internal combustion engine is generic from EP 0 945 598 A2 previously known. In this internal combustion engine are in a special embodiment each in a radial bearing in the cylinder head of the internal combustion engine supported ends of both camshafts, each with a device to vary the timing of the gas exchange valves of the internal combustion engine connected, each of which via a traction means with the crankshaft Internal combustion engine in drive connection drive unit and off there is an output unit connected to the respective camshaft. Between the drive unit and the output unit of each device in a known manner at least two hydraulic systems acting against each other Pressure chambers formed either optionally or simultaneously with a hydraulic Pressure medium can be acted upon and thus a relative rotation or hydraulic clamping of the respective camshaft cause the crankshaft of the internal combustion engine. The supply and discharge of the hydraulic pressure medium to and from the pressure chambers of both devices is separate for each device by an electromagnetic Control valve regulated, which via the radial bearing of the respective Camshaft and via corresponding pressure medium channels in this and in Cylinder head of the internal combustion engine with the pressure chambers of the device in Fluid connection is established. Each of these electromagnetic control valves is made usually from an electromagnet with an electrical end face Plug contact and from a cartridge connected to the electromagnet, which in the known solution is designed as a valve seat Hole is insertable, each in the vicinity of the radial bearing of the camshafts into the cylinder head walls of the internal combustion engine running parallel to this is incorporated and for space-saving arrangement of the control valves runs obliquely to the crankcase of the internal combustion engine.

Nachteilig bei dieser bekannten Brennkraftmaschine ist es jedoch, dass die elektromagnetischen Steuerventile für die Vorrichtungen zum Variieren der Ventilsteuerzeiten trotz ihrer schrägen Anordnung an den Längsseiten der Zylinderkopfwände einen vergrößerten Einbauraum für die Brennkraftmaschine im Fahrzeug erfordern, der nicht in jedem Fall verfügbar ist oder erst durch aufwändige Umordnung der nebengeordneten Aggregate der Brennkraftmaschine geschaffen werden muss. Darüber hinaus sind die Elektromagneten der Steuerventile und deren elektrische Steckkontakte durch ihre ungeschützte Anordnung an der Brennkraftmaschine einer erhöhten Verschmutzungsgefahr ausgesetzt, die längerfristig zu Fehlfunktionen oder zum Ausfall der elektromagnetischen Steuerventile und damit auch zum Ausfall der Vorrichtungen zum Variieren der Ventilsteuerzeiten der Brennkraftmaschine führen kann. A disadvantage of this known internal combustion engine, however, is that electromagnetic control valves for the devices for varying the Valve timing despite their oblique arrangement on the long sides of the cylinder head walls an enlarged installation space for the internal combustion engine in the vehicle that is not always available or only through elaborate rearrangement of the subordinate units of the internal combustion engine must be created. In addition, the electromagnets are the Control valves and their electrical plug contacts through their unprotected Arrangement on the internal combustion engine an increased risk of contamination exposed to long-term malfunction or failure of the electromagnetic Control valves and thus the failure of the devices for Varying the valve timing of the internal combustion engine can result.

Aufgabe der ErfindungObject of the invention

Der Erfindung liegt deshalb die Aufgabe zu Grunde, eine Brennkraftmaschine mit zumindest zwei in deren Zylinderkopf nebeneinander angeordneten Nokkenwellen, insbesondere mit einer Einlass- und einer Auslassnockenwelle, zu konzipieren, welche durch eine platzsparende Anordnung der elektromagnetischen Steuerventile für die Vorrichtung zum Variieren der Ventilsteuerzeiten nur ein Minimum an Einbauraum im Fahrzeug benötigt und sich durch einfache Maßnahmen zur weitestgehenden Vermeidung verschmutzungsbedingter Ausfälle der elektromagnetischen Steuerventile auszeichnet.The invention is therefore based on the object of an internal combustion engine with at least two cam shafts arranged side by side in their cylinder head, especially with an intake and an exhaust camshaft conceive which by a space-saving arrangement of the electromagnetic Control valves for the device for varying the valve timing requires only a minimum of installation space in the vehicle and is simple Measures to largely avoid pollution-related failures of the electromagnetic control valves.

Zusammenfassung der ErfindungSummary of the invention

Erfindungsgemäß wird diese Aufgabe bei einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1 dadurch gelöst, dass die Ventilaufnahmen der Steuerventile als gesonderte Flanschhalterungen mit einer Einsteckbohrung ausgebildet sind, welche direkt oberhalb der Radiallager der Nockenwellen derart auf dem Zylinderkopf der Brennkraftmaschine befestigt sind, dass die Steuerventile mit ihrem Cartridge voneinander wegweisend und mit ihren Elektromagneten unmittelbar gegenüberliegend auf einer gemeinsamen, quer zu den Längsachsen der Nockenwellen verlaufenden Längsachse nebeneinander angeordnet sind, wobei die elektrischen Steckkontakte der Elektromagneten über jeweils eine parallel zu deren Stirnseiten verlaufende Verlängerung voneinander wegweisend neben den Elektromagneten parallel zur Längsachse der Steuerventile angeordnet sind.According to the invention, this object is achieved in an internal combustion engine Preamble of claim 1 solved in that the valve seats of Control valves as separate flange brackets with an insertion hole are formed, which are directly above the radial bearing of the camshafts are attached to the cylinder head of the internal combustion engine such that the Control valves with their cartridges pointing away from each other and with their electromagnets directly opposite on a common, across the longitudinal axes of the camshafts extending longitudinal axis side by side are arranged, the electrical plug contacts of the electromagnet via an extension from each other which runs parallel to the end faces thereof groundbreaking next to the electromagnets parallel to the longitudinal axis of the Control valves are arranged.

In zweckmäßiger Weiterbildung der erfindungsgemäß ausgebildeten Brennkraftmaschine weisen die Ventilaufnahmen der Steuerventile dabei bevorzugt einen trapezförmigen Profilquerschnitt auf und sind mit der größeren ihrer beiden Parallelflächen auf einer ebenen Gegenfläche eines vorzugsweise auf dem Zylinderkopf der Brennkraftmaschine aufsetzbaren Zylinderkopfdeckels verschraubt. Zu diesem Zweck sind an die größeren Parallelflächen der Ventilaufnahmen zusätzlich mehrere Befestigungsflansche für Gewindeschrauben angeformt, die in entsprechende Gewindebohrungen in der Gegenfläche des Zylinderkopfdeckels einschraubbar sind. Der trapezförmige Profilquerschnitt der Ventilaufnahmen hat sich dabei in platz- und gewichtssparender Hinsicht als am vorteilhaftesten erwiesen, kann jedoch auch durch einen anderen geeigneten Profilquerschnitt, beispielsweise durch einen halbrunden oder einen rechteckigen Profilquerschnitt, ersetzt werden.In an expedient development of the internal combustion engine designed according to the invention have the valve receptacles of the control valves preferred have a trapezoidal profile cross-section and are the larger of their two Parallel surfaces on a flat counter surface, preferably on the Screwed cylinder head of the internal combustion engine mountable cylinder head cover. For this purpose, the larger parallel surfaces of the valve seats in addition, several mounting flanges for threaded screws are formed, in corresponding threaded holes in the counter surface of the cylinder head cover are screwable. The trapezoidal profile cross section of the Valve mounts has proven to be space and weight saving most advantageously proven, but can also be by another suitable one Profile cross-section, for example through a semicircular or a rectangular profile cross-section to be replaced.

Ein weiteres wesentliches Merkmal der erfindungsgemäß ausgebildeten Brennkraftmaschine ist es, dass jeweils eine Lagerhälfte der in bekannter Weise zumeist zweiteilig ausgebildeten Radiallager der Nockenwellen in den Zylinderkopfdeckel integriert ist und über in den Zylinderkopfdeckel sowie in die Ventilaufnahmen eingearbeitete Druckmittelleitungen mit der Einsteckbohrung in der jeweils über dem Radiallager angeordneten Ventilaufnahme verbunden ist. Ausgehend von den Einsteckbohrungen für die Steuerventile in den Ventilaufnahmen erfolgt über diese Druckmittelleitungen sowie über die Radiallager der Nockenwellen und über die in diesen angeordneten Druckmittelkanäle die Zu- und Abführung des hydraulischen Druckmittels zu und von den Druckkammern der Vorrichtungen zum Variieren der Ventilsteuerzeiten. Dabei werden die in den Ventilaufnahmen und in den Zylinderkopfdeckel eingearbeiteten Druckmittelleitungen im wesentlichen durch jeweils zwei von der Einsteckbohrung in der jeweiligen Ventilaufnahme ausgehende senkrechte Bohrungen durch den Zylinderkopfdeckel hindurch gebildet, die innerhalb der Radiallager der Nockenwellen in entsprechende mit den Druckmittelkanälen in den Nokkenwellen verbundene Ringkanäle an den Enden der Nockenwellen münden. Eine derartige Ausbildung soll sich jedoch ebenso wie die beschriebene Anordnung und Ausbildung der Steuerventile und ihrer Ventilaufnahmen nicht nur auf Brennkraftmaschinen mit an den Zylinderkopfdeckel integrierten Radiallagerhälften für die Nockenwellen beschränken, sondern ist mit geringfügigen Anpassungen auch analog bei Brennkraftmaschinen mit vom Zylinderkopfdekkel getrennt angeordneten Nockenwellen-Radiallagern realisierbar. Ebenso ist es denkbar, die in die Ventilaufnahmen einsteckbaren und mit diesen bevorzugt verschraubten Steuerventile mit den Ventilaufnahmen durch eine unlösbare Verbindung miteinander einteilig auszubilden. Another essential feature of those designed according to the invention It is internal combustion engine that each one half of the bearing in a known manner mostly two-part radial bearing of the camshafts in the cylinder head cover is integrated and in the cylinder head cover and in the Integrated valve lines with the insertion hole connected in the valve seat arranged above the radial bearing is. Starting from the insertion holes for the control valves in the valve seats takes place via these pressure medium lines and the radial bearings the camshafts and the pressure medium channels arranged in them Supply and discharge of the hydraulic pressure medium to and from the pressure chambers of the devices for varying the valve timing. In doing so those incorporated in the valve seats and in the cylinder head cover Pressure fluid lines essentially by two each from the insertion hole vertical holes going out in the respective valve receptacle formed through the cylinder head cover inside the radial bearing the camshafts in corresponding with the pressure medium channels in the camshafts connected ring channels open at the ends of the camshafts. Such training should, however, just like the arrangement described and training of the control valves and their valve seats not only on internal combustion engines with radial bearing halves integrated on the cylinder head cover restrict for the camshafts, but is with minor Adjustments also analogous to internal combustion engines with a cylinder head cover Separately arranged camshaft radial bearings can be implemented. Likewise it is conceivable that the plug-in into the valve receptacles and preferred with them screwed control valves with the valve receptacles by an unsolvable Form connection in one piece.

Hinsichtlich der aus den Stirnseiten der in Montagestellung sich unmittelbar gegenüberliegenden Elektromagneten der Steuerventile heraustretenden elektrischen Steckkontakte, die aus Platzgründen über eine Verlängerung auf einer Längsachse neben den Elektromagneten bzw. in einer horizontalen Ebene zwischen den Elektromagneten und den Vorrichtungen zum Variieren der Ventilsteuerzeiten angeordnet und somit erschwert zugänglich sind, wird es in Ausgestaltung der erfindungsgemäß ausgebildeten Brennkraftmaschine noch vorgeschlagen, diese Steckkontakte bevorzugt derart mit einem Abstand zu den Mantelflächen der Elektromagneten anzuordnen, dass diese Mantelflächen als Führungsflächen bei der Montage der Kabelstecker verwendbar sind. Dies bedeutet, dass der Abstand der Steckkontakte zu den Mantelflächen der Elektromagneten in etwa der Dicke des Kabelsteckergehäuses entspricht, so dass es bei der manuellen Montage der Kabelstecker auch ohne direkten Sichtkontakt möglich ist, durch Aufsetzen der Kabelstecker auf den Mantelflächen der Elektromagneten und anschließendes lineares Verschieben der Kabelstecker entlang der Mantelflächen eine sichere Steckverbindung zwischen den Kabelstekkern und den elektrischen Steckkontakten der Elektromagneten herzustellen.With regard to the face of the in the mounting position immediately opposite electromagnets of the control valves emerging electrical Plug contacts that have an extension on a for space reasons Longitudinal axis next to the electromagnet or in a horizontal plane between the electromagnets and the devices for varying the valve timing arranged and thus difficult to access, it will be designed proposed the internal combustion engine designed according to the invention, these plug contacts are preferably at a distance from the To arrange outer surfaces of the electromagnets that these outer surfaces as Guide surfaces can be used when installing the cable connector. This means, that the distance of the plug contacts to the outer surfaces of the electromagnets roughly corresponds to the thickness of the cable connector housing, making it with manual assembly of the cable connector even without direct visual contact is possible by placing the cable connector on the outer surface of the electromagnet and then linearly moving the cable connector along the lateral surfaces a secure plug connection between the cable plugs and to produce the electrical plug contacts of the electromagnets.

Schließlich wird es in weiterer Ausgestaltung der erfindungsgemäß ausgebildeten Brennkraftmaschine noch vorgeschlagen, dass die Vorrichtungen zum Variieren der Ventilsteuerzeiten mit deren Zugmittel sowie die Ventilaufnahmen und die Elektromagneten der Steuerventile einschließlich ihrer elektrischen Steckkontakte bevorzugt durch eine Kunststoffhaube zusätzlich schmutzgeschützt angeordnet sind. Diese Kunststoffhaube hat im wesentlichen eine Querschnittsform, die sich durch eine Anpassung an die Kontur eines Längsschnittes durch das vorrichtungsseitige Zylinderkopfende der Brennkraftmaschine entlang einer Nockenwellen-Längsachse ergibt und wird bevorzugt durch eine Steckverbindung am Zylinderkopf der Brennkraftmaschine befestigt. Anstelle einer Kunststoffhaube ist jedoch auch eine Haube aus einem Leichtmetall oder aus einem anderen geeigneten Material verwendbar, die auch durch eine Schraubverbindung oder dergleichen am Zylinderkopf der Brennkraftmaschine befestigt werden kann. Finally, in a further embodiment, it is designed according to the invention Internal combustion engine still proposed that the devices for Varying the valve timing with their traction means as well as the valve receptacles and the solenoids of the control valves, including their electrical ones Plug contacts preferably protected from dirt by a plastic hood are arranged. This plastic hood essentially has one Cross-sectional shape, which is characterized by an adaptation to the contour of a longitudinal section through the device-side cylinder head end of the internal combustion engine along a longitudinal axis of the camshaft results and is preferred attached to the cylinder head of the internal combustion engine by a plug connection. Instead of a plastic hood, there is also a hood made of a light metal or usable from another suitable material, which too by a screw connection or the like on the cylinder head of the internal combustion engine can be attached.

Die erfindungsgemäß ausgebildete Brennkraftmaschine mit zumindest zwei in deren Zylinderkopf nebeneinander angeordneten Nockenwellen, insbesondere mit einer Einlass- und einer Auslassnockenwelle, weist somit gegenüber dem aus dem Stand der Technik bekannten Brennkraftmaschinen den Vorteil auf, dass durch die platzsparende Anordnung der elektromagnetischen Steuerventile für die Vorrichtungen zum Variieren der Ventilsteuerzeiten keine Veränderungen des Einbauraums der Brennkraftmaschine oder eine Umordnung der nebengeordneten Aggregate der Brennkraftmaschine mehr notwendig ist. Die Anordnung der elektromagnetischen Steuerventile in gesonderten, als Flanschhalterungen ausgebildeten Ventilaufnahmen auf dem Zylinderkopf der Brennkraftmaschine hat zu dem noch den Vorteil, dass diese beim Service der Brennkraftmaschine leicht zugänglich sind und in einfachster Weise gereinigt oder ausgetauscht werden können. Darüber hinaus ist durch eine zusätzliche Verkleidung der Vorrichtungen, der Ventilaufnahmen und der Elektromagneten der Steuerventile einschließlich ihrer Steckkontakte mittels einer Kunststoffhaube eine einfache Maßnahme getroffen, verschmutzungsbedingte Ausfälle der elektromagnetischen Steuerventile und somit auch der Vorrichtungen zum Variieren der Ventilsteuerzeiten der Brennkraftmaschine zu vermeiden.The internal combustion engine designed according to the invention with at least two in whose cylinder head arranged side by side camshafts, in particular with an intake and an exhaust camshaft, thus faces the Internal combustion engines known from the prior art have the advantage that through the space-saving arrangement of the electromagnetic control valves no changes for the devices for varying the valve timing of the installation space of the internal combustion engine or a rearrangement of the secondary units of the internal combustion engine is more necessary. The Arrangement of the electromagnetic control valves in separate, as flange brackets trained valve receptacles on the cylinder head of the internal combustion engine also has the advantage that this is the service of Internal combustion engine are easily accessible and cleaned in the simplest way or can be exchanged. In addition, an additional Cladding of devices, valve seats and electromagnets the control valves including their plug contacts by means of a plastic hood a simple measure taken, pollution-related failures the electromagnetic control valves and thus also the devices for Avoid varying the valve timing of the internal combustion engine.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert und ist in den dazugehörigen Zeichnung schematisch dargestellt. Dabei zeigen:

Figur 1
eine räumliche Teildarstellung eines mit zwei nebeneinander angeordneten Nockenwellen ausgerüsteten Zylinderkopfes einer erfindungsgemäß ausgebildeten Brennkraftmaschine;
Figur 2
eine Teilansicht eines Längsschnittes entlang einer Nockenwellen-Längsachse durch den Zylinderkopf einer erfindungsgemäß ausgebildeten Brennkraftmaschine;
Figur 3
eine Draufsicht auf eine Teilansicht des Zylinderkopfes einer erfindungsgemäß ausgebildeten Brennkraftmaschine.
The invention is explained in more detail below using an exemplary embodiment and is shown schematically in the accompanying drawing. Show:
Figure 1
a partial spatial representation of a cylinder head equipped with two side-by-side camshafts of an internal combustion engine designed according to the invention;
Figure 2
a partial view of a longitudinal section along a longitudinal axis of the camshaft through the cylinder head of an internal combustion engine designed according to the invention;
Figure 3
a plan view of a partial view of the cylinder head of an internal combustion engine designed according to the invention.

Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings

Aus den Figuren 1 und 2 geht deutlich der Zylinderkopf 1 einer Brennkraftmaschine hervor, in dem zwei jeweils als Einlass- und Auslassnockenwelle ausgebildete Nockenwellen 4, 5 nebeneinander angeordnet sind. Dabei ist klar zu erkennen, dass an den in jeweils einem Radiallager 2, 3 im Zylinderkopf 1 der Brennkraftmaschine gelagerten Enden 6, 7 beider Nockenwellen 4, 5 jeweils eine hydraulische Vorrichtung 8, 9 zum Variieren der Steuerzeiten der Gaswechselventile der Brennkraftmaschine befestigt ist, welche jeweils aus einer über ein Zugmittel 10 mit der nicht dargestellten Kurbelwelle der Brennkraftmaschine in Antriebsverbindung stehenden Antriebseinheit 11, 12 und aus einer drehfest mit der jeweiligen Nockenwelle 4, 5 verbundenen Abtriebseinheit 13, 14 besteht. Diese Vorrichtungen 8, 9 sind in der dargestellten Ausführung als sogenannte Rotationskolbenversteller ausgebildet, deren Antriebseinheit 11, 12 durch einen hohlzylindrischen Stator mit mehreren radialen Begrenzungswänden und deren Abtriebseinheit 13, 14 durch einen Rotor mit mehreren Flügeln gebildet wird. Bei diesen Vorrichtungen 8, 9 werden zwischen der Antriebseinheit 11, 12 und der Abtriebseinheit 13, 14 mehreren gegeneinander wirkende sowie wahlweise oder gleichzeitig mit einem hydraulischen Druckmittel beaufschlagbare Druckkammern gebildet, indem die Flügel des Rotors in den Raum zwischen den radialen Begrenzungswänden des Stators hineinragen und diesen in jeweils zwei Druckkammern unterteilen. Die Zu- und Abführung des hydraulischen Druckmittels zu und von den Druckkammern jeder Vorrichtung 8, 9 erfolgt dann über die Radiallager 2, 3 der Nockenwellen 4, 5 sowie über in den Nockenwellen 4, 5 angeordnete Druckmittelkanäle 17, 17' bzw. 18, 18' und wird für jede Vorrichtung 8, 9 gesondert durch ein elektromagnetisches Steuerventil 15, 16 geregelt, welches jeweils aus einem in einer Ventilaufnahme 19, 20 einsteckbaren Cartridge 21, 22 und aus einem mit diesem verbundenen Elektromagneten 23, 24 besteht, der an seiner freien Stirnseite 25, 26 einen elektrischen Steckkontakt 27, 28 aufweist. 1 and 2 clearly show the cylinder head 1 of an internal combustion engine in which two are each designed as intake and exhaust camshafts Camshafts 4, 5 are arranged side by side. It is clear too recognize that the in each in a radial bearing 2, 3 in the cylinder head 1 Internal combustion engine mounted ends 6, 7 of both camshafts 4, 5 each a hydraulic device 8, 9 for varying the timing of the gas exchange valves is attached to the internal combustion engine, each of which consists of a via a traction means 10 with the crankshaft, not shown, of the internal combustion engine drive unit 11, 12 and a drive connection output unit 13 non-rotatably connected to the respective camshaft 4, 5, 14 exists. These devices 8, 9 are in the embodiment shown as so-called rotary piston adjuster, the drive unit 11, 12 by a hollow cylindrical stator with a plurality of radial boundary walls and their output unit 13, 14 by a rotor with several blades is formed. In these devices 8, 9 are between the drive unit 11, 12 and the output unit 13, 14 several against each other acting as well as optionally or simultaneously with a hydraulic pressure medium pressurizable pressure chambers formed by the blades of the rotor in protrude the space between the radial boundary walls of the stator and divide them into two pressure chambers. The supply and discharge the hydraulic pressure medium to and from the pressure chambers of each device 8, 9 then takes place via the radial bearings 2, 3 of the camshafts 4, 5 and Via pressure medium channels 17, 17 'or, respectively, arranged in the camshafts 4, 5 or 18, 18 'and is separated for each device 8, 9 by an electromagnetic Control valve 15, 16 regulated, each of which in a valve seat 19, 20 insertable cartridge 21, 22 and from one with this connected electromagnet 23, 24, which is on its free end face 25, 26 has an electrical plug contact 27, 28.

Desweiteren ist in den Figuren 1 und 2 zu sehen, dass die Ventilaufnahmen 19, 20 der Steuerventile 15, 16 erfindungsgemäß als gesonderte Flanschhalterungen mit einer Einsteckbohrung 29, 30 ausgebildet sind, welche direkt oberhalb der Radiallager 2, 3 der Nockenwellen 4, 5 derart auf dem Zylinderkopf 1 der Brennkraftmaschine befestigt sind, dass die Steuerventile 15, 16 mit ihrem Cartridge 21, 22 voneinander wegweisend und mit ihren Elektromagneten 23, 24 sich unmittelbar gegenüberliegend auf einer gemeinsamen, quer zu den Längsachsen der Nockenwellen 4, 5 verlaufenden Längsachse nebeneinander angeordnet sind. Da eine solche Anordnung der Steuerventile 15, 16 mit den üblichen stirnseitigen Steckkontakten für deren Elektromagneten 23, 24 aus Platzmangel nicht möglich wäre, sind die Steckkontakte 27, 28 der Elektromagneten 23, 24 dabei ebenfalls erfindungsgemäß über jeweils eine parallel zu deren Stirnseiten 25, 26 verlaufende Verlängerung 31, 32 voneinander wegweisend neben den Elektromagneten 23, 24 sowie parallel zur Längsachse der Steuerventile 15, 16 angeordnet. Dabei wird insbesondere aus Figur 2 deutlich, dass die Verlängerungen 31, 32 der Steckkontakte 27, 28 zur weiteren platzsparenden Anordnung der Steuerventile 15, 16 eine in Richtung der Vorrichtungen 8, 9 verschwenkte Stellung aufweisen, durch welche die Steckkontakte 27, 28 in einer horizontalen Ebene zwischen den Vorrichtungen 8, 9 und den Elektromagneten 23, 24 der Steuerventile 15, 16 angeordnet sind. Der dadurch erschwerten Zugänglichkeit der Steckkontakte 27, 28 wird dabei durch die Maßnahme abgeholfen, dass die Steckkontakte 27, 28 mit einem Abstand zu den Mantelflächen 42, 43 der Elektromagneten 23, 24 angeordnet sind, der etwa der Dicke des Gehäuses des zu montierenden Kabelsteckers entspricht, so dass die Mantelflächen 42, 43 als Führungsflächen bei der Herstellung der Steckverbindung zwischen dem Kabelstecker und den Steckkontakten 27, 28 verwendbar sind.Furthermore, it can be seen in FIGS. 1 and 2 that the valve receptacles 19, 20 of the control valves 15, 16 according to the invention as separate flange brackets are formed with an insertion hole 29, 30, which is directly above the radial bearing 2, 3 of the camshafts 4, 5 on the cylinder head 1 the internal combustion engine are attached that the control valves 15, 16 with their Cartridge 21, 22 pointing away from each other and with their electromagnets 23, 24 directly opposite each other on a common, transverse to the Longitudinal axes of the camshafts 4, 5 running longitudinal axis side by side are arranged. Since such an arrangement of the control valves 15, 16 with the usual front-side plug contacts for their electromagnets 23, 24 Lack of space would not be possible, the plug contacts 27, 28 of the electromagnet 23, 24 also according to the invention in each case parallel to the end faces 25, 26 extending extension 31, 32 pointing away from each other in addition to the electromagnets 23, 24 and parallel to the longitudinal axis of the Control valves 15, 16 arranged. It is particularly clear from FIG. 2 that the extensions 31, 32 of the plug contacts 27, 28 for further space-saving Arrangement of the control valves 15, 16 in the direction of the devices 8, 9 have pivoted position through which the plug contacts 27, 28 in a horizontal plane between the devices 8, 9 and Electromagnets 23, 24 of the control valves 15, 16 are arranged. The result difficult accessibility of the plug contacts 27, 28 is thereby Measure remedied that the plug contacts 27, 28 at a distance the lateral surfaces 42, 43 of the electromagnets 23, 24 are arranged, the corresponds approximately to the thickness of the housing of the cable connector to be installed, so that the outer surfaces 42, 43 as guide surfaces in the manufacture of the Plug connection between the cable plug and the plug contacts 27, 28 are usable.

Weiterhin ist den Darstellungen in den Figuren 1 und 2 zu entnehmen, dass die als Flanschhalterungen ausgebildeten Ventilaufnahmen 19, 20 einen platzund gewichtssparenden, trapezförmigen Profilquerschnitt aufweisen und mit der größeren ihrer beiden Parallelflächen 33, 34 auf einer ebenen Gegenfläche 35, 36 verschraubt sind, die in der dargestellten Ausführung sich auf einem auf dem Zylinderkopf 1 aufsetzbaren Zylinderkopfdeckel 37 befindet. In diesem Zylinderkopfdeckel 37 ist, wie in Figur 3 angedeutet, jeweils eine Lagerhälfte 38, 39 der Radiallager 2, 3 der Nockenwellen 4, 5 integriert, welche über in den Zylinderkopfdeckel 37 sowie in die Ventilaufnahmen 19, 20 eingearbeitete Druckmittelleitungen 40, 40', 41, 41' mit der jeweiligen Einsteckbohrung 29, 30 der über dem Radiallager 2, 3 angeordneten Ventilaufnahme 19, 20 verbunden ist. Diese Druckmittelleitungen 40, 40', 41, 41' sind im wesentlichen als von der Einsteckbohrung 29, 30 jeder Ventilaufnahme 19, 20 ausgehende Bohrungen durch den Zylinderkopfdeckel 37 hindurch ausgebildet, die in entsprechende, nicht näher bezeichnete Ringkanäle in den Nockenwellen 4, 5 münden und mit den zu den Druckkammern der Vorrichtungen 8, 9 führenden Druckmittelkanälen 17, 17' und 18, 18' verbunden sind. Zusätzlich sind die Vorrichtungen 8, 9 mit deren Zugmittel 10 sowie die Ventilaufnahme 19, 20 und die Elektromagneten 23, 24 einschließlich ihrer Steckkontakte 27, 28 durch eine in den Figuren 2 und 3 angedeutete Kunststoffhaube 44 schmutzgeschützt angeordnet, die durch eine Steckverbindung am Zylinderkopf 1 bzw. am Zylinderkopfdeckel 37 der Brennkraftmaschine befestigt ist. Furthermore, the representations in FIGS. 1 and 2 show that the valve receptacles 19, 20, which are designed as flange brackets, take up a lot of space have weight-saving, trapezoidal profile cross-section and with the larger of its two parallel surfaces 33, 34 on a flat counter surface 35, 36 are screwed, in the embodiment shown on one the cylinder head 1 attachable cylinder head cover 37 is located. In this As indicated in FIG. 3, cylinder head cover 37 is in each case one half of the bearing 38, 39 of the radial bearings 2, 3 of the camshafts 4, 5 integrated, which in the Cylinder head cover 37 and incorporated in the valve seats 19, 20 Pressure medium lines 40, 40 ', 41, 41' with the respective insertion bore 29, 30 the valve receptacle 19, 20 arranged above the radial bearing 2, 3 is connected is. These pressure medium lines 40, 40 ', 41, 41' are essentially as of the insertion bore 29, 30 of each valve receptacle 19, 20 outgoing bores formed through the cylinder head cover 37, which in corresponding, Ring channels, not specified, open into the camshafts 4, 5 and with the pressure medium channels leading to the pressure chambers of the devices 8, 9 17, 17 'and 18, 18' are connected. In addition, the devices 8, 9 with their traction means 10 and the valve receptacle 19, 20 and Electromagnets 23, 24 including their plug contacts 27, 28 by an in 2 and 3 indicated plastic hood 44 arranged to protect against dirt, through a plug connection on cylinder head 1 or on the cylinder head cover 37 of the internal combustion engine is attached.

BezugszahlenlisteLIST OF REFERENCE NUMBERS

11
Zylinderkopfcylinder head
22
Radiallagerradial bearings
33
Radiallagerradial bearings
44
Nockenwellecamshaft
55
Nockenwellecamshaft
66
EndeThe End
77
EndeThe End
88th
Vorrichtungcontraption
99
Vorrichtungcontraption
1010
Zugmitteltraction means
1111
Antriebseinheitdrive unit
1212
Antriebseinheitdrive unit
1313
Abtriebseinheitdriven unit
1414
Abtriebseinheitdriven unit
1515
Steuerventilcontrol valve
1616
Steuerventilcontrol valve
1717
DruckmittelkanalPressure fluid channel
17'17 '
DruckmittelkanalPressure fluid channel
1818
DruckmittelkanalPressure fluid channel
18'18 '
DruckmittelkanalPressure fluid channel
1919
Ventilaufnahmevalve receiving
2020
Ventilaufnahmevalve receiving
2121
Cartridgecartridge
2222
Cartridgecartridge
2323
Elektromagnetelectromagnet
2424
Elektromagnetelectromagnet
2525
Stirnseitefront
2626
Stirnseitefront
2727
Steckkontaktplug contact
2828
Steckkontaktplug contact
2929
Einsteckbohrunginsertion bore
3030
Einsteckbohrunginsertion bore
3131
Verlängerungrenewal
3232
Verlängerungrenewal
3333
Parallelflächeparallel surface
3434
Parallelflächeparallel surface
3535
Gegenflächecounter surface
3636
Gegenflächecounter surface
3737
ZylinderkopfdeckelCylinder head cover
3838
Lagerhälftebearing half
3939
Lagerhälftebearing half
4040
DruckmittelleitungPressure medium line
40'40 '
DruckmittelleitungPressure medium line
4141
Druckmittelleitung Pressure medium line
41'41 '
DruckmittelleitungPressure medium line
4242
Mantelflächelateral surface
4343
Mantelflächelateral surface
4444
KunststoffhaubePlastic hood

Claims (5)

Brennkraftmaschine mit zumindest zwei in deren Zylinderkopf nebeneinander angeordneten Nockenwellen, insbesondere mit einer Einlass- und einer Auslassnockenwelle, mit folgenden Merkmalen: an den in jeweils einem Radiallager (2, 3) im Zylinderkopf (1) der Brennkraftmaschine gelagerten Enden (6, 7) beider Nockenwellen (4, 5) ist jeweils eine hydraulische Vorrichtung (8, 9) zum Variieren der Steuerzeiten der Gaswechselventile der Brennkraftmaschine befestigt, die Vorrichtungen (8, 9) bestehen jeweils aus einer über ein Zugmittel (10) mit der Kurbelwelle der Brennkraftmaschine in Antriebsverbindung stehenden Antriebseinheit (11, 12) und aus einer drehfest mit der jeweiligen Nockenwelle (4, 5) verbundenen Abtriebseinheit (13, 14), zwischen der Antriebseinheit (11, 12) und der Abtriebseinheit (13, 14) jeder Vorrichtung (8, 9) werden mindestens zwei gegeneinander wirkende hydraulische Druckkammern gebildet, die wahlweise oder gleichzeitig mit einem hydraulischen Druckmittel beaufschlagbar sind, die Zu- und Abführung des hydraulischen Druckmittels zu und von den Druckkammern jeder Vorrichtung (8, 9) erfolgt durch jeweils ein elektromagnetisches Steuerventil (15, 16) über die Radiallager (2, 3) der Nokkenwellen (4, 5) sowie über in diesen und im Zylinderkopf (1) der Brennkraftmaschine angeordnete Druckmittelkanäle (17, 17', 18, 18'), die Steuerventile (15, 16) bestehen jeweils aus einem in eine Ventilaufnahme (19, 20) einsteckbaren Cartridge (21, 22) und aus einem mit diesem verbunden Elektromagneten (23, 24), welcher an seiner freien Stirnseite (25, 26) einen elektrischen Steckkontakt (27, 28) aufweist, dadurch gekennzeichnet, dass die Ventilaufnahmen (19, 20) der Steuerventile (15, 16) als gesonderte Flanschhalterungen mit einer Einsteckbohrung (29, 30) ausgebildet sind, welche direkt oberhalb der Radiallager (2, 3) der Nockenwellen (4, 5) derart auf dem Zylinderkopf (1) der Brennkraftmaschine befestigt sind, dass die Steuerventile (15, 16) mit ihrem Cartridge (21, 22) voneinander wegweisend und mit ihrem Elektromagneten (23, 24) sich gegenüberliegend auf einer gemeinsamen, quer zu den Längsachsen der Nockenwellen (4, 5) verlaufenden Längsachse nebeneinander angeordnet sind, wobei die Steckkontakte (27, 28) der Elektromagneten (23, 24) über jeweils eine parallel zu deren Stirnseiten (25, 26) verlaufende Verlängerung (31, 32) voneinander wegweisend neben den Elektromagneten (23, 24) sowie parallel zur Längsachse der Steuerventile (15, 16) angeordnet sind. Internal combustion engine with at least two camshafts arranged side by side in its cylinder head, in particular with an intake and an exhaust camshaft, with the following features: At each of the ends (6, 7) of both camshafts (4, 5), which are mounted in a radial bearing (2, 3) in the cylinder head (1) of the internal combustion engine, there is a hydraulic device (8, 9) for varying the control times of the gas exchange valves of the internal combustion engine fixed the devices (8, 9) each consist of a drive unit (11, 12) which is connected to the crankshaft of the internal combustion engine via a traction means (10) and an output unit (13, 14) which is connected to the respective camshaft (4, 5) in a rotationally fixed manner ) Between the drive unit (11, 12) and the output unit (13, 14) of each device (8, 9), at least two hydraulic pressure chambers acting against each other are formed, which can be acted upon selectively or simultaneously with a hydraulic pressure medium, The hydraulic pressure medium is supplied and discharged to and from the pressure chambers of each device (8, 9) by means of an electromagnetic control valve (15, 16) via the radial bearings (2, 3) of the camshafts (4, 5) and in these and pressure medium channels (17, 17 ', 18, 18') arranged in the cylinder head (1) of the internal combustion engine, the control valves (15, 16) each consist of a cartridge (21, 22) which can be inserted into a valve receptacle (19, 20) and an electromagnet (23, 24) connected to the latter, which has a free end face (25, 26) has electrical plug contact (27, 28), characterized in that the valve receptacles (19, 20) of the control valves (15, 16) are designed as separate flange brackets with an insertion hole (29, 30), which are located directly above the radial bearings (2, 3) of the camshafts (4, 5) on the cylinder head ( 1) the internal combustion engine is attached, that the control valves (15, 16) with their cartridges (21, 22) point away from each other and with their electromagnets (23, 24) opposite one another on a common longitudinal axis running transversely to the longitudinal axes of the camshafts (4, 5), wherein the plug contacts (27, 28) of the electromagnets (23, 24) each have an extension (31, 32) extending parallel to their end faces (25, 26) pointing away from each other next to the electromagnets (23, 24) and parallel to the longitudinal axis of the control valves (15, 16) are arranged. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die bevorzugt einen trapezförmigen Profilquerschnitt aufweisenden Ventilaufnahmen (19, 20) der Steuerventile (15, 16) mit der größeren ihrer beiden Parallelflächen (33, 34) auf einer ebenen Gegenfläche (35, 36) eines vorzugsweise auf den Zylinderkopf (1) der Brennkraftmaschine aufsetzbaren Zylinderkopfdeckels (37) verschraubt sind.Internal combustion engine according to claim 1, characterized in that the valve receptacles (19, 20) of the control valves (15, 16) , which preferably have a trapezoidal profile cross section, preferably have the larger of their two parallel surfaces (33, 34) on a flat counter surface (35, 36) are screwed onto the cylinder head (1) of the internal combustion engine cylinder head cover (37). Brennkraftmaschine nach Anspruch 2, dadurch gekennzeichnet, dass jeweils eine Lagerhälfte (38, 39) der in bekannter Weise zweiteilig ausgebildeten Radiallager (2, 3) der Nockenwellen (4, 5) in den Zylinderkopfdeckel (37) integriert ist und über in diesen sowie in die Ventilaufnahmen (19, 20) eingearbeitete Druckmittelleitungen (40, 40', 41, 41') mit den Einsteckbohrungen (29, 30) in den Ventilaufnahmen (19, 20) verbunden ist. Internal combustion engine according to claim 2, characterized in that in each case one bearing half (38, 39) of the radial bearings (2, 3) of the camshafts (4, 5), which are formed in two parts in a known manner, is integrated into the cylinder head cover (37) and via this and in the valve receptacles (19, 20) integrated pressure medium lines (40, 40 ', 41, 41') are connected to the insertion bores (29, 30) in the valve receptacles (19, 20). Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steckkontakte (27, 28) der Elektromagneten (23, 24) der Steuerventile (15, 16) bevorzugt derart mit einem Abstand zu den Mantelflächen (42, 43) der Elektromagneten (23, 24) angeordnet sind, dass diese Mantelflächen (42, 43) als Führungsflächen bei der Montage der Kabelstecker verwendbar sind.Internal combustion engine according to claim 1, characterized in that the plug contacts (27, 28) of the electromagnets (23, 24) of the control valves (15, 16) are preferably spaced apart from the lateral surfaces (42, 43) of the electromagnets (23, 24) are arranged so that these lateral surfaces (42, 43) can be used as guide surfaces when installing the cable connector. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtungen (8, 9) mit deren Zugmittel (10), die Ventilaufnahmen (19, 20) und die Elektromagneten (23, 24) der Steuerventile (15, 16) einschließlich ihrer elektrischen Steckkontakte (27, 28) bevorzugt durch eine Kunststoffhaube (44) zusätzlich schmutzgeschützt angeordnet sind.Internal combustion engine according to claim 1, characterized in that the devices (8, 9) with their traction means (10), the valve seats (19, 20) and the electromagnets (23, 24) of the control valves (15, 16) including their electrical plug contacts ( 27, 28) are preferably arranged so as to be protected against dirt by a plastic hood (44).
EP02006171A 2001-04-11 2002-03-19 Internal combustion engine with at least two over head cam shafts Expired - Lifetime EP1249582B1 (en)

Applications Claiming Priority (2)

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DE10118119 2001-04-11
DE10118119A DE10118119C2 (en) 2001-04-11 2001-04-11 Internal combustion engine with two camshafts arranged side by side in their cylinder head, in particular with an intake and an exhaust camshaft

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EP1249582A2 true EP1249582A2 (en) 2002-10-16
EP1249582A3 EP1249582A3 (en) 2003-01-08
EP1249582B1 EP1249582B1 (en) 2004-02-18

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EP (1) EP1249582B1 (en)
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DE10118119C2 (en) 2003-11-20
DE50200246D1 (en) 2004-03-25
EP1249582B1 (en) 2004-02-18
US6505588B2 (en) 2003-01-14
DE10118119A1 (en) 2002-10-24
US20020174842A1 (en) 2002-11-28
EP1249582A3 (en) 2003-01-08

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