DE102004029622A1 - Valve operating element with valve actuating sections - Google Patents

Valve operating element with valve actuating sections Download PDF

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Publication number
DE102004029622A1
DE102004029622A1 DE102004029622A DE102004029622A DE102004029622A1 DE 102004029622 A1 DE102004029622 A1 DE 102004029622A1 DE 102004029622 A DE102004029622 A DE 102004029622A DE 102004029622 A DE102004029622 A DE 102004029622A DE 102004029622 A1 DE102004029622 A1 DE 102004029622A1
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Germany
Prior art keywords
valve
roller
sections
cam
valve actuating
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.)
Ceased
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DE102004029622A
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German (de)
Inventor
Willi Schultz
Frank Ickinger
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.)
Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE102004029622A priority Critical patent/DE102004029622A1/en
Priority to EP05008707A priority patent/EP1609961A1/en
Publication of DE102004029622A1 publication Critical patent/DE102004029622A1/en
Ceased 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the 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
    • 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
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Dieses Ventilbetätigungselement mit Ventilbetätigungsabschnitten ist für zwei Hubventile einer Brennkraftmaschine ausgebildet, das eine mit einer Nockenbahn einer Nockenwelle zusammenarbeitende Rolle umfasst, welche Rolle unter Zwischenschaltung eines Lagerbolzens in Lagerabschnitten des als Rollenschlepphebel dargestellten Ventilbetätigungselement angeordnet ist. DOLLAR A Um dieses Ventilbetätigungselement zu optimieren, wirken die Ventilbetätigungsabschnitte des Rollenschlepphebels mittels beiderseits der von dem Lagerbolzen getragenen Rolle vorgesehener hydraulischer Stößel auf die Hubventile ein.This valve actuating element with valve actuating sections is designed for two lifting valves of an internal combustion engine which comprises a roller cooperating with a cam track of a camshaft, which roller is arranged, with the interposition of a bearing pin, in bearing sections of the valve actuating element shown as a roller cam follower. DOLLAR A In order to optimize this valve actuator, the valve actuation portions of the roller cam follower act on the lift valves by means of hydraulic rams provided on either side of the roller carried by the bearing pin.

Description

Die Erfindung betrifft ein Ventilbetätigungselement mit Ventilbetätigungsabschnitten für zwei Hubventile einer Brennkraftmaschine nach dem Oberbegriff des Patentanspruchs 1.The The invention relates to a valve actuating element with valve actuating sections for two globe valves an internal combustion engine according to the preamble of the claim 1.

Es ist ein Ventiltrieb für eine Brennkraftmaschine bekannt, EP 0 798 451 B1 , der eine Nockenwelle mit einer Schiebenockeneinrichtung umfasst. Die hülsenartig auf der Nockenwelle angeordnete Schiebenockeneinrichtung ist mit beabstandeten Hubkurven und nebeneinander liegenden Nockenbahnen mit unterschiedlichen Nockenformen versehen. Die Hubkurven arbeiten zur Verstellung der Scheibenockeneinrichtung mit Steuerstifte aufweisenden Betätigungselementen zusammen. Dieser Ventiltrieb bietet bedeutende Potentiale, um mit vergleichsweise einfachen Mitteln eine hochwirksame variable Ventilsteuerung für eine Brennkraftmaschine zu realisieren, und zwar mit dem Ziel letztere bezüglich Leistung und Verbrauch zu optimieren.It is known a valve train for an internal combustion engine, EP 0 798 451 B1 comprising a camshaft with a sliding cam device. The sleeve-like arranged on the camshaft sliding cam device is provided with spaced cam lifts and adjacent cam tracks with different cam shapes. The lifting curves work together to adjust the disc cam device with control pins having actuators. This valvetrain offers significant potential to realize with relatively simple means a highly effective variable valve timing for an internal combustion engine, with the aim of optimizing the latter in terms of performance and consumption.

Eine vergleichbare Schiebenockeneinrichtung geht aus der nicht veröffentlichten DE 103 32 927 hervor, die Hubkurven mit unterschiedlichen Hubkurvensektionen aufweist. Letztere sichern einen ruckfreien Verlauf der Verstellung der Schiebenockeneinrichtung zur Schaltung der verschiedenen Nockenbahnen.A comparable sliding cam device is from the unpublished DE 103 32 927 which has lift curves with different lift curve sections. The latter ensure a smooth course of adjustment of the sliding cam device for switching the various cam tracks.

Es ist Aufgabe der Erfindung ein Ventilbetätigungselement mit Ventilbetätigungsabschnitten für zwei Ventile einer Brennkraftmaschine zu schaffen, das bei räumlich günstiger Bauweise sich durch gute Funktion auszeichnet. Dabei sollte sichergestellt werden, dass sich das Ventilbetätigungselement bei einem Ventiltrieb umsetzen lässt, der eine Schiebenockeneinrichtung für eine variable Ventilsteuerung besitzt.It The object of the invention is a valve actuating element with valve actuating sections for two To create valves of an internal combustion engine, which in spatially favorable Construction is characterized by good function. It should be ensured be that the valve actuator can be implemented in a valve train, the one sliding cam device for a variable valve timing has.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, dass das Zusammenwirken der Ventilbetätigungsabschnitte des Rollenschlepphebels mit den Hubventilen durch die Stößel vorteilhaft ist. Baulich günstig wirkt sich aus, dass die Ventilbetätigungsabschnitte als Gehäuse für die Stößel ausgebildet sind. Letzteres wird auch noch dadurch unterstützt, dass jeder Stößel als vormontierte Baueinheit in eine Bohrung des jeweiligen Gehäuses eingesetzt ist. Schließlich eignet sich der Einsatz des Ventilbetätigungselements in Verbindung mit einer Schiebenockeneinrichtung des Ventiltriebs der Brennkraftmaschine, mit welcher Schiebnockeneinrichtung eine variable Ventilsteuerung realisierbar ist.The with the invention mainly The benefits achieved are to be seen in the fact that the interaction the valve operating sections the Rollenschlepphebels with the lift valves by the plunger advantageous is. Reasonably priced Affects that the valve actuating portions formed as a housing for the plunger are. The latter is also supported by the fact that each plunger as preassembled unit inserted into a bore of the respective housing is. After all is the use of the valve operating element in conjunction with a sliding cam device of the valve train of the internal combustion engine, with which sliding cam device a variable valve control is feasible.

In der Zeichnung wird ein Ausführungsbeispiel der Erfindung gezeigt, das nachstehend näher erläutert wird.In The drawing is an embodiment of the invention, which is explained in more detail below.

Es zeigtIt shows

1 eine Schrägansicht eines Ventiltriebs einer Brennkraftmaschine mit einem Ventilbetätigungselement nach der Erfindung, 1 an oblique view of a valve train of an internal combustion engine with a valve actuator according to the invention,

2 einen Längsschnitt durch eine Nockenwelle des Ventiltriebs nach 1. 2 a longitudinal section through a camshaft of the valve train after 1 ,

Von einer Brennkraftmaschine 1, die zum Einbau in ein Kraftfahrzeug geeignet ist, ist lediglich ein Ventiltrieb 2 mit Hubventilen 3, 4 und 5, 6 dargestellt. Die Hubventile 3, 4 sind Einlassventile; die Hubventile 5, 6 Auslassventile. Diese Ventile sind oberhalb eines Brennraums eines Zylinders angeordnet, letztere sind nicht dargestellt. Eine Nockenwelle Nw, angetrieben von einer Kurbelwelle und in beabstandeten Nockenwellenlagern NwI und Nw2 gelagert, betätigt die von Ventilfedern 7 und 8 umgebene Hubventile 3, 4, und zwar unter Zwischenschaltung eines Ventilbetätigungselements 9, das durch einen Rollenschlepphebel 10 gebildet wird. Hierzu ist die Nockenwelle Nw mit einer büchsenartigen Schiebenockeneinrichtungen 11 versehen, die zwar axial beweglich – in axialer Richtung A-A – der Nockenwelle Nw gelagert ist, jedoch drehfest mit letzterer verbunden ist, wobei die Nockenwelle Nw und die Schiebenockeneinrichtung 11 unter Zwischenschaltung einer formschlüssigen Nabenverbindung – nicht gezeigt – zusammenarbeiten.From an internal combustion engine 1 , which is suitable for installation in a motor vehicle, is only a valve train 2 with lift valves 3 . 4 and 5 . 6 shown. The lift valves 3 . 4 are intake valves; the lift valves 5 . 6 Exhaust valves. These valves are arranged above a combustion chamber of a cylinder, the latter are not shown. A camshaft Nw, driven by a crankshaft and supported in spaced camshaft bearings NwI and Nw2, actuates those of valve springs 7 and 8th surrounded lift valves 3 . 4 , with the interposition of a valve actuator 9 that by a roller rocker 10 is formed. For this purpose, the camshaft Nw with a bush-like sliding cam devices 11 provided, although axially movable - in the axial direction AA - the camshaft Nw is mounted, but rotatably connected to the latter, wherein the camshaft Nw and the sliding cam device 11 with the interposition of a positive hub connection - not shown - work together.

Die Schiebenockeneinrichtung 11 weist drei Nockenbahnen 12, 13 und 14 mit unterschiedlichen Nockenformen NI, NII und NIII auf, die zu einem Nockenblock 15 zusammengefasst sind und nebeneinander liegen. Der Nockenblock 15 wird beiderseits von Hubkurve 16 und b17 begrenzt. Zur Verstellung der Schiebenockeneinrichtung 11 auf der Nockenwelle 6 sind Steuerstifte 18, 19, 20 und 21 aufweisende Betätigungselemente 22, 23, 24 und 25 vorgesehen, die bspw. elektromagnetischer oder hydraulischer Gattung und radial zur Schiebenockeneinrichtung 11 angeordnet sind. Je nach Schaltung einer der Nockenbahnen 12, 13 und 14 sind die Steuerstifte 18, 19, 20 oder 21 im Eingriff mit den z.B. als U-förmige Ausnehmungen 26 und 27 – 2 – gebildeten Hubkurven 16 und 17.The sliding cam device 11 has three cam tracks 12 . 13 and 14 with different cam shapes NI, NII and NIII, leading to a cam block 15 are summarized and lie next to each other. The cam block 15 will be on both sides of the lift curve 16 and limited to b17. For adjusting the sliding cam device 11 on the camshaft 6 are taxpicks 18 . 19 . 20 and 21 having actuators 22 . 23 . 24 and 25 provided, for example, the electromagnetic or hydraulic genus and radially to the sliding cam device 11 are arranged. Depending on the circuit of one of the cam tracks 12 . 13 and 14 are the control pins 18 . 19 . 20 or 21 in engagement with the example as U-shaped recesses 26 and 27 - 2 - formed lifting curves 16 and 17 ,

Der Rollenschlepphebel 10 weist eine mit den Nockenbahnen 12, 13 und 14 der Nockenwelle Nw zusammenarbeitenden Rolle 28, einen Träger 29 und Ventilbetätigungsabschnitte 30 und 31. Zur Lagerung des Rollenschlepphebels 10 ist ein Lager 32 vorgesehen; zur Lagerung des der Rolle 28 ein Lagerbolzen 33. Beiderseits des Lagerbolzens 33 wirken die Ventilbetätigungsabschnitte 30 und 31 mit hydraulischen Stößeln 34 und 35 auf die Hubventile 3 und 4 ein. Die Ventilbetätigungsabschnitte 30 und 31 sind als Gehäuse 36 und 37 für die Stößel 34 und 35 ausgebildet. Dabei ist jeder Stößel z.B. 34 als vormontierte Baueinheit 38 in eine Bohrung 39 des Gehäuses 36 eingesetzt. Lagerabschnitte 40 und 41 an dem Rollenschlepphebel 10 für den Lagerbolzen 33 weisen eine größere Breite B auf als die Dicke D von Wänden 42 und 43 der Gehäuses 36 und 37.The roller rocker arm 10 has one with the cam tracks 12 . 13 and 14 the camshaft Nw cooperating roller 28 , a carrier 29 and valve operating sections 30 and 31 , For storage of the roller cam follower 10 is a warehouse 32 intended; for storage of the roll 28 a la gerbolzen 33 , On both sides of the bearing pin 33 the valve actuating sections act 30 and 31 with hydraulic rams 34 and 35 on the globe valves 3 and 4 one. The valve operating sections 30 and 31 are as housing 36 and 37 for the pestles 34 and 35 educated. Each ram is eg 34 as a preassembled unit 38 into a hole 39 of the housing 36 used. bearing portions 40 and 41 on the roller rocker arm 10 for the bearing pin 33 have a greater width B than the thickness D of walls 42 and 43 the housing 36 and 37 ,

Claims (6)

Ventilbetätigungselement mit Ventilbetätigungsabschnitten für zwei Hubventile einer Brennkraftmaschine, das eine mit einer Nockenbahn einer Nockenwelle zusammenarbeitende Rolle umfasst, welche Rolle unter Zwischenschaltung eines Lagerbolzens in Lagerabschnitten des als Rollenschlepphebel dargestellten Ventilbetätigungselements angeordnet ist, dadurch gekennzeichnet, dass die Ventilbetätigungsabschnitte (30 und 31) des Rollenschlepphebels (10) mittels beiderseits der von dem Lagerbolzen (33) getragenen Rolle (28) vorgesehener hydraulischer Stößel (34 und 35) auf die Hubventile (3 und 4) einwirken.Valve actuating element with valve actuating sections for two lifting valves of an internal combustion engine, which comprises a roller cooperating with a cam track of a camshaft, which roller is arranged, with the interposition of a bearing pin, in bearing sections of the valve operating element shown as roller cam follower, characterized in that the valve actuating sections ( 30 and 31 ) of the roller cam follower ( 10 ) by means of both sides of the bearing bolt ( 33 ) worn role ( 28 ) provided hydraulic plunger ( 34 and 35 ) on the lift valves ( 3 and 4 ). Ventilbetätigungselement nach Anspruch 1, dadurch gekennzeichnet, dass die Ventilbetätigungsabschnitte (30 und 31) als Gehäuse (36 und 37) für die Stößel (34 und 35) ausgebildet sind.Valve operating element according to claim 1, characterized in that the valve actuating sections ( 30 and 31 ) as a housing ( 36 and 37 ) for the pestles ( 34 and 35 ) are formed. Ventilbetätigungselement nach Anspruch 2, dadurch gekennzeichnet, dass jeder Stößel (34 oder 35) als vormontierte Baueinheit (38) in eine Bohrung (39) des jeweiligen Gehäuses (36) eingesetzt ist.Valve actuator according to claim 2, characterized in that each plunger ( 34 or 35 ) as a preassembled unit ( 38 ) into a hole ( 39 ) of the respective housing ( 36 ) is used. Ventilbetätigungselement nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass Lagerabschnitte (40 und 41) für den Lagerbolzen (33) an dem Rollenschlepphebel (10) eine größere Breite (B) aufweisen als die Dicke (D) der Wände (42 und 43) der Gehäuse (36 und 37).Valve actuator according to claims 1 and 2, characterized in that bearing sections ( 40 and 41 ) for the bearing pin ( 33 ) on the roller rocker arm ( 10 ) have a greater width (B) than the thickness (D) of the walls ( 42 and 43 ) of the housing ( 36 and 37 ). Ventilbetätigungselement nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Rolle (28) mit einem mehrere nebeneinander liegender Nockenbahnen (12, 13 und 14) mit unterschiedlichen Nockenformen (NI, NII und NIII) und Hubkurven (16 und 17) einer Schiebenockeneinrichtung (11) der Nockenwelle (Nw) zusammenarbeitet.Valve operating element according to one or more of the preceding claims, characterized in that the roller ( 28 ) with a plurality of adjacent cam tracks ( 12 . 13 and 14 ) with different cam shapes (NI, NII and NIII) and lift curves ( 16 and 17 ) a sliding cam device ( 11 ) of the camshaft (Nw) cooperates. Ventilbetätigung nach Anspruch 5, dadurch gekennzeichnet, dass die Hubkurven (16 und 17) mit Steuerstifte (18, 19, 20 und b21) aufweisenden Betätigungselementen (22, 23, 24 und 25) zur Verstellung der Schiebenockeneinrichtung (11) zusammenarbeiten.Valve actuator according to claim 5, characterized in that the lifting curves ( 16 and 17 ) with control pins ( 18 . 19 . 20 and b21) having actuating elements ( 22 . 23 . 24 and 25 ) for adjusting the sliding cam device ( 11 ) work together.
DE102004029622A 2004-06-18 2004-06-18 Valve operating element with valve actuating sections Ceased DE102004029622A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102004029622A DE102004029622A1 (en) 2004-06-18 2004-06-18 Valve operating element with valve actuating sections
EP05008707A EP1609961A1 (en) 2004-06-18 2005-04-21 Valve actuating element for two valves having hydraulic lash adjusters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004029622A DE102004029622A1 (en) 2004-06-18 2004-06-18 Valve operating element with valve actuating sections

Publications (1)

Publication Number Publication Date
DE102004029622A1 true DE102004029622A1 (en) 2006-01-12

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DE102004029622A Ceased DE102004029622A1 (en) 2004-06-18 2004-06-18 Valve operating element with valve actuating sections

Country Status (2)

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EP (1) EP1609961A1 (en)
DE (1) DE102004029622A1 (en)

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