DE10258901B4 - Valve control for a valve of an internal combustion engine - Google Patents

Valve control for a valve of an internal combustion engine Download PDF

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Publication number
DE10258901B4
DE10258901B4 DE10258901A DE10258901A DE10258901B4 DE 10258901 B4 DE10258901 B4 DE 10258901B4 DE 10258901 A DE10258901 A DE 10258901A DE 10258901 A DE10258901 A DE 10258901A DE 10258901 B4 DE10258901 B4 DE 10258901B4
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Germany
Prior art keywords
valve
cam
lift
combustion engine
internal combustion
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DE10258901A
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German (de)
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DE10258901A1 (en
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Levon Grigorjan
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F01L1/462—Valve return spring arrangements
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Abstract

Ventilsteuerung für ein Ventil einer Brennkraftmaschine, bei der das Ventil durch eine als Nockenwelle ausgebildete Steuerwelle über einen Bewegungsüberträger betätigt wird, dadurch gekennzeichnet, dass das Maximum des Ventilhubes durch eine mechanische Sperrung des Ventilschaftes festgelegt wird und der tatsächliche, durch die Ventilsperrung begrenzte Ventilhub kleiner als ein durch die Erhebungskurve des Nockens festgelegter maximaler Ventilhub ist und der Bewegungsüberträger zwischen der Steuerwelle und dem Ventil als federndes Bauteil vorgesehen ist, wodurch der nach der mechanischen Sperrung des Ventilschaftes verbleibende Teil der Erhebungskurve des Nockens im Bereich der Nockenspitze nicht in Ventilhub umsetzt, sondern im Bewegungsüberträger federnd ausgeglichen wird.Valve control for a valve of an internal combustion engine, in which the valve is actuated by a control shaft designed as a camshaft via a motion transmitter, characterized in that the maximum of the valve lift is determined by a mechanical locking of the valve stem and the actual valve lift limited by the valve locking is less than is a maximum valve lift determined by the cam elevation curve and the motion transmitter between the control shaft and the valve is provided as a resilient component, as a result of which the part of the cam elevation curve remaining after the mechanical locking of the valve stem does not convert into valve lift in the area of the cam tip, but rather in Movement transmitter is compensated resiliently.

Figure 00000001
Figure 00000001

Description

Es ist bekannt, dass ein Leistungszuwachs für ein Verbrennungsmotor mit festgelegtem Hubraum unter anderem durch die Erhöhung der Betriebsdrehzahl zu erreichen ist. Eine Vergrösserung der Federkraft der Ventilschliessfeder ist dabei unvermeidbar, um den sicheren d.h. ventilflatterfreien Gaswechsel sicherzustellen. Erhöhter Verschleiss bzw. verkürzte Lebensdauer von Nocken, Hubabnehmer, Ventilteller und Ventilsitzring ist die Folge einer solchen Federkraftsvergrösserung.It is known to increase performance for an internal combustion engine with a fixed displacement, among other things by increasing the Operating speed can be reached. An increase in the spring force of the Valve closing spring is inevitable in order to ensure the safe i.e. to ensure valve flutter-free gas changes. Increased wear or shortened Lifetime of cams, lifting devices, valve plates and valve seat rings is the result of such an increase in spring force.

Das Problem: ein durch die Erhöhung der Betriebsdrehzahl zu erzielender Leistungsgewinn ist für Grossserienmotoren auf Grund der verkürzten Lebensdauer des Ventiltriebs ausgeschlossen.The problem: one by increasing the operating speed The performance gain to be achieved is due to large series engines the shortened Lifetime of the valve train excluded.

Dieses Problem wird durch die im Anspruch aufgeführten Merkmale gelöst.This problem is caused by the im Claim listed Features solved.

Eine mechanische Sperrung des Ventilschaftes, bei welcher der tatsächliche, durch die Ventilsperrung begrenzte Ventilhub kleiner als ein durch die Erhebungskurve des Nockens festgelegter maximaler Ventilhub ist und bei welcher ein nach der mechanischen Sperrung des Ventilschaftes verbleibender Teil der Erhebungskurve des Nockens im Bereich der Nockenspitze nicht in Ventilhub umsetzt, sondern im Bewegungsüberträger federnd ausgeglichen wird, macht es möglich, das Trägheitsgewicht von Bewegungsüberträger und Ventil samt Federpaket zu reduzieren. Darüber hinaus ist folgendes im Vergleich mit konventionellen Ventilsteuerungen möglich:
höhere Betriebsdrehzahl bei gleicher Federkraft bzw. bei gleicher Lebensdauer des Ventiltriebs
gleiche Betriebsdrehzahl bei reduzierter Federkraft bzw. bei reduziertem Energie- und Kraftstoff-Verbrauch
„schärfere" Steuerzeiten bei gleicher Betriebsdrehzahl und gleicher Federkraft.A mechanical blocking of the valve stem, in which the actual valve stroke limited by the valve blocking is smaller than a maximum valve stroke defined by the cam elevation curve and in which a part of the cam elevation curve remaining after the mechanical locking of the valve stem is not in the area of the cam tip Valve stroke is implemented, but is compensated resiliently in the motion transmitter, makes it possible to reduce the inertial weight of the motion transmitter and valve including the spring assembly. In addition, the following is possible in comparison with conventional valve controls:
higher operating speed with the same spring force or with the same service life of the valve train
same operating speed with reduced spring force or with reduced energy and fuel consumption
"Sharper" control times at the same operating speed and the same spring force.

Ein Ausführungsbeispiel der Erfindung ist in 1 dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is in 1 shown and is described in more detail below.

Es bedeuten:
(1) Nockenwelle
(2) haarnadelfederähnliche Torsionsfeder
(3) Sperrfeder
(4) Ventilschliessfeder
(9) Ventilschaft
(10) Rollenhubabnehmer (auch im Schnitt)
(11) Scheibe (auch im Schnitt)It means:
( 1 ) Camshaft
( 2 ) torsion spring similar to hairpin feather
( 3 ) Locking spring
( 4 ) Valve closing spring
( 9 ) Valve stem
( 10 ) Roller lifting device (also on average)
( 11 ) Disc (also in the cut)

Als federnder Bewegungsüberträger zwischen Nocken und Ventil ist eine haarnadelfederähnliche Torsionsfeder (2) vorgesehen, welche mit einem Rollenhubabnehmer (10) sowie mit einer Scheibe (11) versehen ist. Die haarnadelfederähnliche Torsionsfeder (2) wird so ausgelegt, dass die kumulierte Federkraft der Sperrfeder (3) und Ventilschliessfeder (4) nicht in der Lage ist, die haarnadelfederähnliche Torsionsfeder (2) zu deformieren, und zwar sowohl bei geöffnetem als auch geschlossenem Zustand des Ventils.As a resilient motion transmitter between the cam and valve, a hairpin spring-like torsion spring ( 2 ) is provided, which with a roller lift ( 10 ) and with a disc ( 11 ) is provided. The hairpin feather-like torsion spring ( 2 ) is designed so that the accumulated spring force of the locking spring ( 3 ) and valve closing spring ( 4 ) is unable to move the hairpin feather-like torsion spring ( 2 ) to deform, both when the valve is open and closed.

Die mechanische Sperrung des Ventilschaftes wird mittels Sperrfeder (3) durch vollständige Komprimierung bis Federblock erreicht. Das Maximum des tatsächlichen Ventilhubes wird durch Differenz zwischen Einbau- und Block-Länge der Sperrfeder (3) festgelegt.The valve stem is mechanically locked by means of a locking spring ( 3 ) achieved by full compression up to the spring block. The maximum of the actual valve stroke is determined by the difference between the installation and block length of the locking spring ( 3 ).

Der Anteil der Erhebungskurve des Nockens im Bereich der Nockenspitze, der nicht in Ventilhub umgesetzt, sondern in der haarnadelfederähnlichen Torsionsfeder (2) federnd ausgeglichen wird, beträgt ungefähr 0,5 mm des Nockenhubes (1).The portion of the cam elevation curve in the area of the cam tip that is not converted into valve lift, but in the hairpin spring-like torsion spring ( 2 ) is compensated resiliently, is approximately 0.5 mm of the cam stroke ( 1 ).

Claims (1)

Ventilsteuerung für ein Ventil einer Brennkraftmaschine, bei der das Ventil durch eine als Nockenwelle ausgebildete Steuerwelle über einen Bewegungsüberträger betätigt wird, dadurch gekennzeichnet, dass das Maximum des Ventilhubes durch eine mechanische Sperrung des Ventilschaftes festgelegt wird und der tatsächliche, durch die Ventilsperrung begrenzte Ventilhub kleiner als ein durch die Erhebungskurve des Nockens festgelegter maximaler Ventilhub ist und der Bewegungsüberträger zwischen der Steuerwelle und dem Ventil als federndes Bauteil vorgesehen ist, wodurch der nach der mechanischen Sperrung des Ventilschaftes verbleibende Teil der Erhebungskurve des Nockens im Bereich der Nockenspitze nicht in Ventilhub umsetzt, sondern im Bewegungsüberträger federnd ausgeglichen wird.Valve control for a valve of an internal combustion engine, in which the valve is actuated by a control shaft designed as a camshaft via a motion transmitter, characterized in that the maximum of the valve lift is determined by a mechanical locking of the valve stem and the actual valve lift limited by the valve locking is less than is a maximum valve lift determined by the cam elevation curve and the motion transmitter between the control shaft and the valve is provided as a resilient component, as a result of which the part of the cam elevation curve remaining after the mechanical locking of the valve stem does not convert into valve lift in the area of the cam tip, but rather in Movement transmitter is compensated resiliently.
DE10258901A 2002-12-17 2002-12-17 Valve control for a valve of an internal combustion engine Expired - Fee Related DE10258901B4 (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4123130A1 (en) * 2021-07-20 2023-01-25 Gomecsys B.V. An internal combustion engine comprising load adjusting spring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3877686T2 (en) * 1987-09-22 1993-05-06 Honda Motor Co Ltd VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES.
DE19811502A1 (en) * 1998-03-17 1999-09-23 Claus Hohmann Valve drive with variable valve lift for IC engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3877686T2 (en) * 1987-09-22 1993-05-06 Honda Motor Co Ltd VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES.
DE19811502A1 (en) * 1998-03-17 1999-09-23 Claus Hohmann Valve drive with variable valve lift for IC engine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BEHRENS, M. et al.: Kraftfahrzeugmotoren-Ausle- gung und Konstruktion, Hrsg. V. Küntscher, 1. Aufl., Verl. Technik, 1987, ISBN 3-341-00277-4, S. 419, 420, 430-432
BEHRENS, M. et al.: Kraftfahrzeugmotoren-Ausle- gung und Konstruktion, Hrsg. V. Küntscher, 1. Aufl., Verl. Technik, 1987, ISBN 3-341-00277-4,S. 419, 420, 430-432 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4123130A1 (en) * 2021-07-20 2023-01-25 Gomecsys B.V. An internal combustion engine comprising load adjusting spring
WO2023001640A1 (en) * 2021-07-20 2023-01-26 Gomecsys B.V. An internal combustion

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