EP3161277A1 - Cylinder head cover for a motor vehicle - Google Patents

Cylinder head cover for a motor vehicle

Info

Publication number
EP3161277A1
EP3161277A1 EP15728868.9A EP15728868A EP3161277A1 EP 3161277 A1 EP3161277 A1 EP 3161277A1 EP 15728868 A EP15728868 A EP 15728868A EP 3161277 A1 EP3161277 A1 EP 3161277A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head cover
cover according
insert
plastic
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
EP15728868.9A
Other languages
German (de)
French (fr)
Other versions
EP3161277B1 (en
Inventor
Helen Esders
Hans Janssen
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.)
Polytec Plastics Germany GmbH and Co KG
Original Assignee
Polytec Plastics Germany GmbH and Co 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 Polytec Plastics Germany GmbH and Co KG filed Critical Polytec Plastics Germany GmbH and Co KG
Publication of EP3161277A1 publication Critical patent/EP3161277A1/en
Application granted granted Critical
Publication of EP3161277B1 publication Critical patent/EP3161277B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/02—Surface coverings of combustion-gas-swept parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

Definitions

  • the invention relates to a cylinder head cover of a motor vehicle made of plastic material with integrated camshaft circuit.
  • a cylinder head cover also called cylinder head cover or valve cover, is known to be the topmost end of a (upright) 4-stroke internal combustion engine.
  • It contains the upper actuators of the valvetrain and prevents the leakage of the lubricating oil to the environment, as well as the access of air into the engine.
  • the cylinder head cover also includes the camshaft sprockets.
  • camshaft adjustment also referred to as variable camshaft control or variable valve timing. This refers to a method for changing the timing of the valve control of 4-stroke engines in operation.
  • valve opening times allows an increase in the efficiency of the engine, depending on the respective load behavior.
  • the intake and exhaust timing are varied depending on the speed and throttle position by actuators in order to achieve the most efficient cylinder filling in all speed ranges actuators, often with the English term “actuator” referred to as “actuators” contribute The camshaft control electrical signals into mechanical motion and thus actively intervene in the control system.
  • the actuator discussed herein displaces a cam package on the camshaft to engage a second cam on the valve. Due to the required precision, only aluminum hoods are currently used to accommodate the actuators.
  • cylinder head covers made of fiberglass- and mineral-filled polyamide 66 are known, which meet all requirements regarding the mechanical stress of cylinder head covers and have a good creep resistance even at elevated temperatures.
  • the engine components described here do not comprise a cylinder head cover of a motor vehicle, in particular no cylinder head cover made of plastic material with integrated camshaft circuit.
  • the metal rails described here do not serve to reinforce the surrounding engine component.
  • the weight saving potential of plastic cylinder head covers over known aluminum cylinder head covers is about 30 to 50%, with a further cost advantage can be achieved by consistent functional integration in the component.
  • the arrangement for the electrical connection of at least one sensor, which is contacted via electrical connection lines and provided on an engine component of an internal combustion engine, which consists at least partially of plastic is characterized in that the electrical connection lines in the form of metal rails and formed in the Plastic of the engine component are integrated, wherein a first end of the rails forms part of a connector receptacle and a second, protruding from the plastic of the engine component end of the rails corresponding terminal pads provides for the sensor, which provided via a sensor connection points of the sensor and the connection pads of the rails Contact plate with contact elements electrically contacted with the rails and thus the connector receptacle.
  • this is not a cylinder head cover.
  • DE 10 2004 026 658 AI relates to a hybrid housing, in particular a motor or gear housing.
  • the purpose of the application is to provide a housing, in particular a motor or gear housing, which fulfills the required stability and accuracy requirements but has a reduced weight.
  • the application creates a hybrid housing, in particular motor or gear housing, with a housing component made of metal on which at least one bearing receptacle is formed, wherein the housing component is coated on an inner side and / or an outer side with plastic and the bearing receptacle on a plastic-free area of the Housing component is formed.
  • This publication does not include a cylinder head cover, especially re no metal storage and no holder of an actuator.
  • the housing is not oil-tight.
  • hybrid technology combines the combination of the properties of two materials, which in total achieves higher performance than the materials taken individually.
  • the object of the present invention is to provide a cylinder head cover of a motor vehicle, which has other advantages in addition to the weight advantages, such as the possible in the case of an additional assembly step, the elimination of additional seals, screws and bushings.
  • a cylinder head cover of a motor vehicle made of fiberglass and / or mineral-reinforced plastic material with integrated camshaft circuit comprising at least one substantially enclosed by the plastic material metallic insert that is in contact with these over the entire surface.
  • the cylinder head covers according to the invention have technical advantages, in particular with respect to the thermal expansion of the sheet compared to the thermal expansion of the camshaft.
  • the invention it is possible to carry out the centering of the hood assembly via the metallic insert. Due to the direct positive connection between the insert and the glass fiber and / or mineral-reinforced plastic material, a high rigidity of the actuator receptacle can be achieved. The effects of temperature, time, humidity, vibration and shrinkage are reduced.
  • the insert is molded as a particular punched, optionally shaped sheet metal part with the glass fiber and / or mineral-reinforced plastic material. This can bring about a particularly good separation of functions.
  • the term of the bleaching part in the sense of the present invention encompasses not only metallic inserts but also so-called organic sheets. These are parts made by forming fiber-reinforced semi-finished products with a thermoplastic matrix, which are combined by thermoplastic injection molding and thermoforming of continuous fiber-reinforced thermoplastics.
  • These organic sheets are preferably produced in an early-roughening forming process and inserted, held and molded as dimensionally stable components in the tool.
  • Organic sheets consist of special fabrics embedded in defined orientations in a thermoplastic matrix.
  • the fabrics are made of fiberglass, Kevlar or carbon fibers.
  • a thermoplastic matrix for example, polyamide is suitable, because it shows, inter alia, a good adhesion to the fibers.
  • the result is hybrid components made entirely of plastic. Compared to their counterparts made of sheet metal, they are lighter and show higher surface stiffness and significantly higher strengths.
  • components such as reinforcements or clips can be integrated by injection molding.
  • the investment in a deep-drawing tool is significantly lower for organic sheets than for metal. That's why the production of hybrid components with organic sheet is worthwhile especially for low to medium quantities.
  • the material of a metallic insert may comprise a steel or aluminum sheet.
  • the desired function of the insert determines the appropriate choice of material.
  • the layer thickness of the insert can be set arbitrarily, wherein a layer thickness of the insert in the form of a sheet can be preferably 0.75 to 2 mm, in particular 1 to 1.5 mm and optionally can be varied and adjusted according to the static or functional requirements.
  • the sheet metal part may optionally have different thicknesses in different areas, for example, to be able to absorb a higher load at certain locations.
  • the metallic insert is completely enclosed on one side by plastic, whereby an oil-tight hood is formed.
  • the oil-tight hood can also be created by over-welding a housing which covers open area.
  • a further preferred embodiment of the present invention is that the insert partially or completely carrier of the actuators of the camshaft or stiffen the plastic receptacle of the actuators accordingly. As a result, an improved exact control of the timing of the camshaft can be achieved.
  • plastic material a number of different materials are available to the person skilled in the art.
  • Particularly preferred for the purposes of the present invention are polyamides which have proven outstandingly well in the prior art, in particular polyamide 66 or PA 6, which have already found their way into concrete vehicle projects.

Landscapes

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

Abstract

The invention relates to a cylinder head cover for a motor vehicle, said cylinder head cover being made of plastic material and being provided with an integrated camshaft timing mechanism.

Description

Zylinderkopfhaube eines Kraftfahrzeuges  Cylinder head cover of a motor vehicle
Gegenstand der Erfindung ist eine Zylinderkopfhaube eines Kraftfahrzeuges aus Kunststoffmaterial mit integrierter Nockenwellenschaltung. The invention relates to a cylinder head cover of a motor vehicle made of plastic material with integrated camshaft circuit.
Eine Zylinderkopfhaube, auch Zylinderkopfdeckel oder Ventildeckel genannt, ist bekanntermaßen der oberste Abschluss eines (aufrechtstehenden) 4-Takt-Verbrennungsmotors. A cylinder head cover, also called cylinder head cover or valve cover, is known to be the topmost end of a (upright) 4-stroke internal combustion engine.
Sie birgt die oberen Betätigungselemente des Ventiltriebs und verhindert das austreten der Schmieröls an die Umwelt, sowie den Zutritt von Luft in den Motor. It contains the upper actuators of the valvetrain and prevents the leakage of the lubricating oil to the environment, as well as the access of air into the engine.
Falls der Ventiltrieb mit einer obenliegenden Nockenwelle ausgerüstet ist und diese mit einer Kette angetrieben wird, umfasst die Zylinderkopfhaube auch die Nockenwellen-Kettenräder. If the valve train is equipped with an overhead camshaft and driven by a chain, the cylinder head cover also includes the camshaft sprockets.
Moderne Fahrzeuge besitzen eine Nockenwellenverstellung, auch als variable Nockenwellensteuerung oder variable Ventilsteuerung bezeichnet. Hierunter versteht man ein Verfahren zur Veränderung der Steuerzeiten der Ventilsteuerung von 4-Taktmotoren im Betrieb. Modern vehicles have a camshaft adjustment, also referred to as variable camshaft control or variable valve timing. This refers to a method for changing the timing of the valve control of 4-stroke engines in operation.
Die Anpassung der Ventilöffnungszeiten erlaubt eine Effizienzsteigerung des Motors, abhängig vom jeweiligen Lastverhalten. Bei der Nockenwellenverstellung werden die Einlass- und Auslass- Steuerzeiten in Abhängigkeit von Drehzahl und Drosselklappenstellung durch Aktuatoren verändert, um in allen Drehzahlbereichen eine möglichst effiziente Zylinderfüllung zu erreichen Aktoren, oft auch mit dem englischen Begriff "actuator" als "Aktuatoren" bezeichnet, setzen bei der Nockenwellensteuerung elektrische Signale in mechanische Bewegung um und greifen damit aktiv in das Regelsystem ein. The adaptation of the valve opening times allows an increase in the efficiency of the engine, depending on the respective load behavior. In the camshaft adjustment, the intake and exhaust timing are varied depending on the speed and throttle position by actuators in order to achieve the most efficient cylinder filling in all speed ranges actuators, often with the English term "actuator" referred to as "actuators" contribute The camshaft control electrical signals into mechanical motion and thus actively intervene in the control system.
Der hier diskutierte Aktuator verschiebt ein Nockenpaket auf der Nockenwelle so dass eine zweite Nocke auf dem Ventil zum Eingriff kommt. Aufgrund der erforderlichen Präzision sind für die Aufnahme der Aktuatoren derzeit nur Aluminiumhauben im Einsatz. The actuator discussed herein displaces a cam package on the camshaft to engage a second cam on the valve. Due to the required precision, only aluminum hoods are currently used to accommodate the actuators.
Aus KU Kunststoffe, Jahrg. 91 (2001) 6, sind Zylinderkopfhauben aus glasfaser- und mineralbefülltem Polyamid 66 bekannt, die auch bei erhöhten Temperaturen alle Anforderungen hinsichtlich der mechanischen Belastung von Zylinderkopfhauben erfüllen und eine gute Kriechfestigkeit besitzen sollen. From KU Kunststoffe, Jahrg. 91 (2001) 6, cylinder head covers made of fiberglass- and mineral-filled polyamide 66 are known, which meet all requirements regarding the mechanical stress of cylinder head covers and have a good creep resistance even at elevated temperatures.
Aus DE 198 04 607 C2 ist eine Anordnung zum elektrischen Anschluss zumindestens eines Sensors bekannt, der über elektrische Verbindungsleitungen kontaktiert wird und an einem Motorbauteil einer Brennkraftmaschine vorgesehen ist, das zumindest teilweise aus Kunststoff besteht, dadurch gekennzeichnet, dass die elektrischen Verbindungsleitungen (20) in Form von metallenen Schienen (21) ausgebildet und in den Kunststoff des Motorbauteils (3) eingebunden sind, wobei ein erstes Ende (24) der Schienen (21) einen Teil einer Steckeraufnahme (26) bil- det und ein zweites, aus dem Kunststoff des Motorbauteils (3) ragendes Ende (25) der Schienen (21) entsprechende Anschlusskontaktstellen (18) für den Sensor (1) bereitstellt, der über eine zwischen Sensoranschlussstellen (8) des Sensors (1) und den Anschlusskontaktstellen (18) der Schienen (21) vorgesehene Kontaktplatte (14) mit Kontaktelementen (22) elektrisch mit den Schienen (21) und somit der Steckeraufnahme (26) kontaktierbar ist. From DE 198 04 607 C2 an arrangement for electrical connection to at least one sensor is known, which is contacted via electrical connection lines and is provided on an engine component of an internal combustion engine, which consists at least partially of plastic, characterized in that the electrical connection lines (20) in Formed by metal rails (21) and are incorporated in the plastic of the motor component (3), wherein a first end (24) of the rails (21) form part of a connector receptacle (26). Det and a second, of the plastic of the engine component (3) projecting end (25) of the rails (21) corresponding connection pads (18) for the sensor (1) provides, via a between sensor connection points (8) of the sensor (1) and the contact pads (18) of the rails (21) provided contact plate (14) with contact elements (22) is electrically contacted with the rails (21) and thus the connector receptacle (26).
Die hier beschriebenen Motorbauteile umfassen jedoch keine Zylinderkopfhaube eines Kraftfahrzeuges, insbesondere keine Zylinderkopfhaube aus Kunststoffmaterial mit integrierter Nockenwellenschaltung. Die hier beschriebenen metallenen Schienen dienen nicht der Verstärkung des sie umgebenden Motorbauteils. However, the engine components described here do not comprise a cylinder head cover of a motor vehicle, in particular no cylinder head cover made of plastic material with integrated camshaft circuit. The metal rails described here do not serve to reinforce the surrounding engine component.
Das Gewichtseinsparpotential von Kunststoff-Zylinderkopfhauben gegenüber bekannten Aluminiumzylinderkopfhauben liegt bei etwa 30 bis 50 %, wobei durch konsequente Funktionsintegration in das Bauteil ein weiterer Kostenvorteil erzielbar ist. The weight saving potential of plastic cylinder head covers over known aluminum cylinder head covers is about 30 to 50%, with a further cost advantage can be achieved by consistent functional integration in the component.
Aus ATZ-Automobiltechnische Zeitschrift, März 2007, Vol. 109, S. 220 bis 224 sind Hybridhauben aus Kunststoff bekannt. Hier wird eine Zylinderkopfhaube beschrieben, bei der ein steifer, aber leichter Metallrahmen die Verstärkungsfunktion der Dichtung übernimmt. Hier wird beschrieben, dass die Verbindung der beiden Materialien nur durch Elastomer erfolgen kann, um sowohl beste akustische Entkopplung zu gewährleisten als auch die verschiedene thermische Ausdehnung der Komponenten auszugleichen. Der Metallversteifungsrahmen hat jedoch keinen Kontakt zum Haubenkörper. DE 198 04 607 C2 beschreibt eine Anordnung zum elektrischen An- schluss zumindest eines Sensors. Die Anordnung zum elektrischen An- schluss zumindest eines Sensors, der über elektrische Verbindungsleitungen kontaktiert wird und an einem Motorbauteil einer Brennkraftmaschine vorgesehen ist, das zumindest teilweise aus Kunststoff besteht, ist dadurch gekennzeichnet, dass die elektrischen Verbindungsleitungen in Form von metallenen Schienen ausgebildet und in den Kunststoff des Motorbauteils eingebunden sind, wobei ein erstes Ende der Schienen einen Teil einer Steckeraufnahme bildet und ein zweites, aus dem Kunststoff des Motorbauteils ragendes Ende der Schienen entsprechende Anschlusskontaktstellen für den Sensor bereitstellt, der über eine zwischen Sensoranschlussstellen des Sensors und den Anschlusskontaktstellen der Schienen vorgesehene Kontaktplatte mit Kontaktelementen elektrisch mit den Schienen und somit die Steckeraufnahme kontaktierbar ist. Hierbei handelt es sich jedoch nicht um eine Zylinderkopfhaube. From ATZ Automobile Technical Journal, March 2007, Vol. 109, pp. 220 to 224 hybrid hoods made of plastic are known. Here a cylinder head cover is described in which a stiff but light metal frame takes over the reinforcing function of the seal. Here it is described that the connection of the two materials can be made only by elastomer, both to ensure the best acoustic decoupling and to compensate for the different thermal expansion of the components. However, the metal stiffening frame has no contact with the hood body. DE 198 04 607 C2 describes an arrangement for the electrical connection of at least one sensor. The arrangement for the electrical connection of at least one sensor, which is contacted via electrical connection lines and provided on an engine component of an internal combustion engine, which consists at least partially of plastic, is characterized in that the electrical connection lines in the form of metal rails and formed in the Plastic of the engine component are integrated, wherein a first end of the rails forms part of a connector receptacle and a second, protruding from the plastic of the engine component end of the rails corresponding terminal pads provides for the sensor, which provided via a sensor connection points of the sensor and the connection pads of the rails Contact plate with contact elements electrically contacted with the rails and thus the connector receptacle. However, this is not a cylinder head cover.
DE 10 2004 026 658 AI betrifft ein Hybridgehäuse, insbesondere ein Motor-oder Getriebegehäuse. Die Anmeldung bezweckt, ein Gehäuse, insbesondere ein Motor-oder Getriebegehäuse, zu schaffen, das die geforderten Stabilitäts-und Genauigkeitsansprüche erfüllt, jedoch ein reduziertes Gewicht aufweist. Hierzu schafft die Anmeldung ein Hybridgehäuse, insbesondere Motor-oder Getriebegehäuse, mit einem Gehäusebauteil aus Metall, an dem zumindest eine Lageaufnahme ausgebildet ist, wobei das Gehäusebauteil an einer Innenseite und/oder einer Außenseite mit Kunststoff beschichtet ist und die Lageraufnahme an einem kunststofffreien Bereich des Gehäusebauteils ausgebildet ist. Auch diese Publikation beinhaltet keine Zylinderkopfhaube, insbesonde- re keine Metalllagerung sowie keine Halterung eines Aktuators. Darüber hinaus ist das Gehäuse nicht öldicht. DE 10 2004 026 658 AI relates to a hybrid housing, in particular a motor or gear housing. The purpose of the application is to provide a housing, in particular a motor or gear housing, which fulfills the required stability and accuracy requirements but has a reduced weight. For this purpose, the application creates a hybrid housing, in particular motor or gear housing, with a housing component made of metal on which at least one bearing receptacle is formed, wherein the housing component is coated on an inner side and / or an outer side with plastic and the bearing receptacle on a plastic-free area of the Housing component is formed. This publication does not include a cylinder head cover, especially re no metal storage and no holder of an actuator. In addition, the housing is not oil-tight.
Die Hybridtechnik vereint bekanntermaßen die Kombination der Eigenschaften zweier Werkstoffe, die in der Summe eine höhere Leistungsfähigkeit erreicht, als die Werkstoffe einzeln für sich genommen. As is well known, hybrid technology combines the combination of the properties of two materials, which in total achieves higher performance than the materials taken individually.
Die Aufgabe der vorliegenden Erfindung besteht in der Bereitstellung einer Zylinderkopfhaube eines Kraftfahrzeuges, die neben den Gewichtsvorteilen weitere Vorteile aufweist, wie beispielsweise den im Fall von einem zusätzlichen Montageschritt möglich, den Wegfall von zusätzlichen Dichtungen, Schrauben und Buchsen. The object of the present invention is to provide a cylinder head cover of a motor vehicle, which has other advantages in addition to the weight advantages, such as the possible in the case of an additional assembly step, the elimination of additional seals, screws and bushings.
Die vorgenannte Aufgabe wird erfindungsgemäß gelöst durch eine Zylinderkopfhaube eines Kraftfahrzeuges aus glasfaser- und/oder mineralverstärktem Kunststoffmaterial mit integrierter Nockenwellenschaltung umfassend wenigstens ein im Wesentlichen von dem Kunststoffmaterial umschlossenes metallisches Einlegeteil, das mit diesen vollflächig in Kontakt ist. The above object is achieved by a cylinder head cover of a motor vehicle made of fiberglass and / or mineral-reinforced plastic material with integrated camshaft circuit comprising at least one substantially enclosed by the plastic material metallic insert that is in contact with these over the entire surface.
Durch den insbesondere im Spritzgussprozess erzeugten Formschluss zwischen dem Kunststoff und dem Einlegeteil des Hybridbauteils wird die Herstellung von hochbelastbaren und kostengünstigen Bauteilen ermöglicht. Im Vergleich zum konventionellen Spritzguss lassen sich so komplexe Strukturen realisieren. The positive connection between the plastic and the insert part of the hybrid component, which is produced in particular during the injection molding process, makes it possible to produce highly resilient and cost-effective components. In comparison to conventional injection molding, such complex structures can be realized.
Gegenüber einem reinen Kunststoff konzept weisen die erfindungsgemäßen Zylinderkopfhauben technische Vorteile, insbesondere in Bezug auf die Wärmeausdehnung des Blechs im Vergleich zur Wärmeausdehnung der Nockenwelle auf. Compared to a pure plastic concept, the cylinder head covers according to the invention have technical advantages, in particular with respect to the thermal expansion of the sheet compared to the thermal expansion of the camshaft.
Erfindungsgemäß ist es möglich, die Zentrierung der Haubenmontage über das metallische Einlegeteil vorzunehmen. Durch den direkten Formschluss zwischen dem Einlegeteil und dem glasfaser- und/oder mineralverstärktem Kunststoffmaterial kann eine hohe Steifigkeit der Ak- tuatoraufnahme erreicht werden. Die Einflüsse durch Temperatur, Zeit, Feuchtigkeit, Schwingung und Schwindung werden reduziert. According to the invention, it is possible to carry out the centering of the hood assembly via the metallic insert. Due to the direct positive connection between the insert and the glass fiber and / or mineral-reinforced plastic material, a high rigidity of the actuator receptacle can be achieved. The effects of temperature, time, humidity, vibration and shrinkage are reduced.
Besonders bevorzugt im Sinne der vorliegenden Erfindung wird das Einlegeteil als insbesondere gestanztes, gegebenenfalls geformtes Blechteil mit den glasfaser- und/oder mineralverstärktem Kunststoffmaterial umspritzt. Hierdurch lässt sich eine besonders gute Funktionstrennung herbeiführen. Particularly preferred according to the present invention, the insert is molded as a particular punched, optionally shaped sheet metal part with the glass fiber and / or mineral-reinforced plastic material. This can bring about a particularly good separation of functions.
Der Begriff des Bleichteiles im Sinne der vorliegenden Erfindung um- fasst neben metallischen Einlegeteilen auch sogenannte Organobleche. Hierunter versteht man Teile, die durch Umformen faserverstärkter Halbzeuge mit einer thermoplastischen Matrix, die durch thermoplastischen Spritzguss und das Thermoformen endlosfaserverstärkter Thermoplasten kombiniert werden. The term of the bleaching part in the sense of the present invention encompasses not only metallic inserts but also so-called organic sheets. These are parts made by forming fiber-reinforced semi-finished products with a thermoplastic matrix, which are combined by thermoplastic injection molding and thermoforming of continuous fiber-reinforced thermoplastics.
Diese Organobleche werden bevorzugt in einem vorraugehenden Um- formprozess erzeugt und als formstabile Bauteile in das Werkzeug eingelegt, gehalten und umspritzt. These organic sheets are preferably produced in an early-roughening forming process and inserted, held and molded as dimensionally stable components in the tool.
Prinzipiell ist es möglich, durch diese Verfahrenskombination mit Spritzgießen weitere Funktionselemente zu integrieren. Der Prozess ermög- licht damit die Herstellung großserientauglicher Bauteile mit kurzen Zykluszeiten. In principle, it is possible to integrate further functional elements by means of this process combination with injection molding. The process allows Thus, the production of mass-production-compatible components with short cycle times.
Organobleche bestehen aus speziellen Geweben, die in definierten Orientierungen in eine Thermoplastmatrix eingebettet sind. Die Gewebe werden aus Glasfaser-, Kevlar- oder Kohlefasern hergestellt. Als Thermoplastmatrix eignet sich zum Beispiel Polyamid, weil es unter anderem eine gute Haftung zu den Fasern zeigt. Das Ergebnis sind Hybridbauteile, die vollständig aus Kunststoff bestehen. Im Vergleich zu ihren Pendants aus Blech sind sie leichter und zeigen eine höhere Flä- chensteifigkeit sowie deutlich höhere Festigkeiten. Zudem können An- bauteile wie Verstärkungen oder Clipse durch Anspritzen integriert werden. Außerdem kann auf den Korrosionsschutz verzichtet werden, der bei metallischem Blech häufig einen zusätzlichen Kostenfaktor darstellt. Die Investition in ein Werkzeug zum Tiefziehen ist bei Organoblechen deutlich geringer als bei Metall. Deshalb lohnt sich die Fertigung von Hybridbauteilen mit Organoblech vor allem bei niedrigen bis mittleren Stückzahlen. Organic sheets consist of special fabrics embedded in defined orientations in a thermoplastic matrix. The fabrics are made of fiberglass, Kevlar or carbon fibers. As a thermoplastic matrix, for example, polyamide is suitable, because it shows, inter alia, a good adhesion to the fibers. The result is hybrid components made entirely of plastic. Compared to their counterparts made of sheet metal, they are lighter and show higher surface stiffness and significantly higher strengths. In addition, components such as reinforcements or clips can be integrated by injection molding. In addition, can be dispensed with the corrosion protection, which is often an additional cost factor in metallic sheet metal. The investment in a deep-drawing tool is significantly lower for organic sheets than for metal. That's why the production of hybrid components with organic sheet is worthwhile especially for low to medium quantities.
Das Material eines metallischen Einlegeteils kann ein Stahl- oder Aluminiumblech umfassen. Die gewünschte Funktion des Einlegeteils bestimmt dabei die entsprechende Materialwahl. The material of a metallic insert may comprise a steel or aluminum sheet. The desired function of the insert determines the appropriate choice of material.
Die Schichtdicke des Einlegeteils kann beliebig eingestellt werden, wobei eine Schichtdicke des Einlegeteils in Form eines Blechs vorzugsweise 0,75 bis 2 mm, insbesondere 1 bis 1,5 mm betragen kann und gegebenenfalls den statischen oder funktionellen Erfordernissen entsprechend variiert und angepasst werden kann. Somit kann das Blechteil gegebenenfalls in verschiedenen Bereichen unterschiedliche Dicken aufweisen, um beispielsweise an bestimmten Orten eine höhere Belastung aufnehmen zu können. The layer thickness of the insert can be set arbitrarily, wherein a layer thickness of the insert in the form of a sheet can be preferably 0.75 to 2 mm, in particular 1 to 1.5 mm and optionally can be varied and adjusted according to the static or functional requirements. Thus, the sheet metal part may optionally have different thicknesses in different areas, for example, to be able to absorb a higher load at certain locations.
Eine weitere besondere Ausführungsform der vorliegenden Erfindung besteht darin, dass das metallische Einlegeteil einseitig vollständig von Kunststoff umschlossen ist, wodurch eine öldichte Haube entsteht. Die öldichte Haube kann auch durch Überschweißen eines Gehäuses erzeugt werden, welches offene Bereich abdeckt. Another particular embodiment of the present invention is that the metallic insert is completely enclosed on one side by plastic, whereby an oil-tight hood is formed. The oil-tight hood can also be created by over-welding a housing which covers open area.
Eine weitere bevorzugte Ausführungsform der vorliegenden Erfindung besteht darin, dass das Einlegeteil teilweise oder vollständig Träger der Aktuatoren der Nockenwelle ist oder die Kunststoffaufnahme der Aktua- toren entsprechend versteift. Hierdurch lässt sich eine verbesserte exaktere Steuerung der Steuerzeiten der Nockenwelle erreichen. A further preferred embodiment of the present invention is that the insert partially or completely carrier of the actuators of the camshaft or stiffen the plastic receptacle of the actuators accordingly. As a result, an improved exact control of the timing of the camshaft can be achieved.
Für das Kunststoffmaterial stehen dem Fachmann eine Reihe verschiedenster Materialien zur Verfügung. Besonders bevorzugt im Sinne der vorliegenden Erfindung sind Polyamide, die sich im Stand der Technik hervorragend bewährt haben, insbesondere Polyamid 66 oder PA 6, die auch schon Eingang in konkrete Fahrzeugprojekte gefunden haben. For the plastic material, a number of different materials are available to the person skilled in the art. Particularly preferred for the purposes of the present invention are polyamides which have proven outstandingly well in the prior art, in particular polyamide 66 or PA 6, which have already found their way into concrete vehicle projects.

Claims

Patentansprüche: claims:
1. Zylinderkopfhaube eines Kraftfahrzeuges aus glasfaser- und/oder mineral verstärktem Kunststoffmaterial mit integrierter Aufnahme für Nockenwellenschaltung umfassend wenigstens ein im Wesentlichen von dem Kunststoffmaterial umschlossenes Einlegeteil, das mit diesen vollflächig in Kontakt ist. 1. Cylinder head cover of a motor vehicle made of glass fiber and / or mineral-reinforced plastic material with integrated receptacle for camshaft circuit comprising at least one substantially enclosed by the plastic material insert, which is in contact with these over the entire surface.
2. Zylinderkopfhaube nach Anspruch 1, dadurch gekennzeichnet, dass das Einlegeteil ein insbesondere gestanztes, gegebenenfalls geformtes Blechteil umfasst. 2. Cylinder head cover according to claim 1, characterized in that the insert part comprises a punched in particular, optionally shaped sheet metal part.
3. Zylinderkopfhaube nach Anspruch 1 oder 2 umfassend ein Orga- no-, Stahl- oder Aluminiumblech als Einlegeteil. 3. Cylinder head cover according to claim 1 or 2 comprising an organo, steel or aluminum sheet as an insert.
4. Zylinderkopfhaube nach Anspruch 3, dadurch gekennzeichnet, dass das Organoblech Glasfaser-Kevlar- und/oder Kohlenstofffasern umfasst, die in einer thermoplastischen Matrix eingebettet sind. 4. Cylinder head cover according to claim 3, characterized in that the organo sheet glass fiber Kevlar and / or carbon fibers comprises, which are embedded in a thermoplastic matrix.
5. Zylinderkopfhaube nach Anspruch 3 oder 4, dadurch gekennzeichnet, die Schichtdicke des Blechs 0,75 bis 2 mm, insbesondere 1 bis 1,5 mm beträgt und gegebenenfalls den statischen oder funktionellen Erfordernissen entsprechend variiert. 5. Cylinder head cover according to claim 3 or 4, characterized in that the layer thickness of the sheet is 0.75 to 2 mm, in particular 1 to 1.5 mm and optionally varies according to the static or functional requirements.
6. Zylinderkopfhaube nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Einlegeteil einseitig vollständig vom Kunststoff umschlossen ist wodurch eine öldichte Haube entsteht, insbesondere mit dieser verschweißt ist. 6. Cylinder head cover according to one of claims 1 to 5, characterized in that the insert is on one side completely enclosed by the plastic whereby an oil-tight hood is formed, in particular welded to it.
7. Zylinderkopfhaube nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Einlegeteil teilweise oder vollständig Träger der Aktuatoren der Nockenwelle ist oder die Kunststoffaufnahme der Aktuatoren entsprechend versteift. 7. Cylinder head cover according to one of claims 1 to 6, characterized in that the insert partially or completely support the actuators of the camshaft or the plastic receptacle of the actuators stiffened accordingly.
8. Zylinderkopfhaube nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Kunststoffmaterial Polyamid, insbesondere Polyamid 66 oder PA6 bevorzugt mit Glasfasern umfasst. 8. Cylinder head cover according to one of claims 1 to 7, characterized in that the plastic material comprises polyamide, in particular polyamide 66 or PA6 preferably with glass fibers.
EP15728868.9A 2014-06-27 2015-06-15 Cylinder head cover for a motor vehicle Active EP3161277B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014212446.8A DE102014212446A1 (en) 2014-06-27 2014-06-27 Cylinder head cover of a motor vehicle
PCT/EP2015/063326 WO2015197410A1 (en) 2014-06-27 2015-06-15 Cylinder head cover for a motor vehicle

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EP3161277A1 true EP3161277A1 (en) 2017-05-03
EP3161277B1 EP3161277B1 (en) 2019-10-09

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US (1) US10208663B2 (en)
EP (1) EP3161277B1 (en)
CN (1) CN106460723B (en)
DE (1) DE102014212446A1 (en)
MX (1) MX2016017254A (en)
WO (1) WO2015197410A1 (en)

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DE19804607C2 (en) 1998-02-06 2000-02-10 Bosch Gmbh Robert Arrangement for the electrical connection of at least one sensor
US6832587B2 (en) * 2003-01-28 2004-12-21 Dana Corporation Plastic valve cover with integrated metal
DE102004026658A1 (en) * 2004-06-01 2005-12-29 Kwd Automotive Group & Co. Kg hybrid housing
JP4896817B2 (en) * 2006-07-25 2012-03-14 本田技研工業株式会社 Variable valve operating device for internal combustion engine
US7654237B2 (en) * 2007-01-23 2010-02-02 Lanxess Corporation Cam cover
DE102007025129A1 (en) 2007-05-30 2008-12-04 Mahle International Gmbh Cylinder head cover
DE102007063254A1 (en) 2007-12-31 2009-07-02 Mahle International Gmbh Cylinder head cover
DE202008005019U1 (en) 2008-04-10 2009-08-20 Mann+Hummel Gmbh Cylinder head cover for a cylinder head of an internal combustion engine
JP5171427B2 (en) 2008-06-23 2013-03-27 ダイハツ工業株式会社 Cam angle sensor mounting apparatus for internal combustion engine
DE102011014335A1 (en) 2011-03-18 2012-09-20 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Cylinder head cover for an internal combustion engine
DE102012209860A1 (en) * 2012-06-13 2013-12-19 Schaeffler Technologies AG & Co. KG Sliding cam valve drive, has cam piece comprising spiral groove, carrier extending along base shaft, actuator fixed to cam piece using pin retractable into spiral groove, and latching unit provided outside cam piece

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WO2015197410A1 (en) 2015-12-30
CN106460723B (en) 2019-06-07
US10208663B2 (en) 2019-02-19
DE102014212446A1 (en) 2015-12-31
EP3161277B1 (en) 2019-10-09
US20170138255A1 (en) 2017-05-18
CN106460723A (en) 2017-02-22
MX2016017254A (en) 2017-04-10

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