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DE10258901A1 - Timing gear for IC engines with actual valve stroke as determined by valve shaft locking smaller than theoretical valve stroke determined by valve lifting curve of cam - Google Patents

Timing gear for IC engines with actual valve stroke as determined by valve shaft locking smaller than theoretical valve stroke determined by valve lifting curve of cam Download PDF

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Publication number
DE10258901A1
DE10258901A1 DE2002158901 DE10258901A DE10258901A1 DE 10258901 A1 DE10258901 A1 DE 10258901A1 DE 2002158901 DE2002158901 DE 2002158901 DE 10258901 A DE10258901 A DE 10258901A DE 10258901 A1 DE10258901 A1 DE 10258901A1
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DE
Germany
Prior art keywords
valve
determined
cam
stroke
theoretical
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.)
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Application number
DE2002158901
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German (de)
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DE10258901B4 (en
Inventor
Levon Grigorjan
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Individual
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Individual
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Priority to DE10258901A priority Critical patent/DE10258901B4/en
Publication of DE10258901A1 publication Critical patent/DE10258901A1/en
Application granted granted Critical
Publication of DE10258901B4 publication Critical patent/DE10258901B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01L1/12—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

Landscapes

  • 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

A valve (5) with closing spring (4) is actuated by a camshaft (1) via a spring-shaped movement transmitter (2). Max. valve stroke is determined by mechanical locking of the valve shaft by a locking spring (3). The actual valve stroke is smaller than a theoretical stroke, e.g. as determined by the valve lifting curve of the cam. Movement transmitters between camshaft and valve are formed by spring parts. Part of the valve lifting curve in the area of the cam tip, is not converted into valve stroke but is lost in the transmission chain between shaft and valve.

Description

Es ist bekannt dass ein Leistungszuwachs für den Verbrennungsmotor mit festgelegtem Hubraum unter anderem durch die Betriebsdrehzahlenerhöhung zu erreichen ist. Eine Zwangsvergrösserung der Federkraft den Ventilschliessfedern ist dabei unvermeidbar, um den sicheren Ventilflatternsfreien Gaswechsel beizubehalten. Erhöhter Verschleiss bzw. verkürzte Lebensdauer von Nocken seinen Hubabnehmer, Ventilteller und Ventilsi– tzring sind die Folgen.It is known that an increase in performance for the internal combustion engine with a fixed displacement, among other things due to the increase in operating speed to achieve. A forced enlargement of the Spring force of the valve closing springs is inevitable to the to maintain safe valve flutter-free gas changes. Increased wear or shortened Lifetime of the cam, its stroke receiver, valve plate and valve seat ring are the consequences.

Das Problem: Ein durch die Betriebsdrehzahlenerhöhung erzielende Leistungsgewinn ist für Grossserienmotoren auf Grund der verkürzte Lebensdauer des Ventiltriebs ausgeschlossen.The problem: one achieved by increasing the operating speed Performance gain is for large series engines due to the shortened Lifetime of the valve train excluded.

Dieses Problem wird durch die im Anspruch 1 ausgeführten Merkmale gelöst.This problem is caused by the im Claim 1 executed Features solved.

Die Geschwindigkeit des Ventils in der Ventilsteuerung nach Anspruch 1 wird anders als es bisher üblich ist, auf Null reduziert, und zwar nicht durch die Federkraft am Ende der Öffnungshälfte der Ventilerhebungskurve des Nockens sondern ohne Federkraft und kurz davor. Damit kann die Federkraft der Ventilschliessfeder vollständig und ausschliesslich zur eigentlichen Rückstellung des Ventils genutzt werden, wodurch ist folgendes möglich:

  • – höhere Betriebsdrehzahlen mit gleicher Federkraft
  • – gleiche Betriebsdrehzahlen mit reduzierter Federkraft
  • – "schärfere" Nocken mit gleicher Federkraft
The speed of the valve in the valve control according to claim 1 is different from what has been customary so far, reduced to zero, and not by the spring force at the end of the opening half of the valve lift curve of the cam but without spring force and shortly before. The spring force of the valve closing spring can thus be used completely and exclusively for the actual resetting of the valve, which enables the following:
  • - higher operating speeds with the same spring force
  • - same operating speeds with reduced spring force
  • - "sharper" cams with the same spring force

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt.An embodiment of the invention is shown in the drawing.

Es zeigen:Show it:

1. Ventilsteuerung nach Anspruch 1. 1 , Valve control according to claim 1.

Es bedeuten:It means:

11
Nockenwellecamshaft
22
BewegungsüberträgerMotion vectors
33
Sperrfederlocking spring
44
Ventilschliessfedervalve closing
55
VentilValve

Als Bewegungsüberträger zwischen den Nocken und Ventil wird eine Haarnadelfederähnliche Feder (2) verwendet, die mit einem Rollenhubabnehmer versehen ist und deren Federkraft im spannungsfreien Zustand grösser als gesamter Enndruck der Feder (3) und (4) ist.As a motion transmitter between the cams and valve, a hairpin spring-like spring ( 2 ) is used, which is equipped with a roller jack and whose spring force when de-energized is greater than the total final pressure of the spring ( 3 ) and ( 4 ) is.

Tatsächlicher Ventilhub bildet sich aus Differenz zwischen Einbau- und Minimallänge (vollständige Komprimierung) der Sperrfeder (3).Actual valve lift is the difference between the installation and minimum length (full compression) of the locking spring ( 3 ).

Ein weiterer Vorteil der Erfindung: die Ventilsteuerung nach Anspruch 1 kann mit geringem Modifikationsaufwand zu entschprechend (im Sinne der Übertragungsart des Nockenhubes) ähnlichen Ventilsteuerungen angepasst bzw. in schon vorhandene Zylinderköpfe eingebaut werden.Another advantage of the invention: the valve control according to claim 1 can with little modification effort too appropriate (in terms of the type of transmission the cam stroke) similar Valve controls adapted or built into existing cylinder heads become.

Die Weiterbildung der Erfindung nach Patentanspruch 2 ermöglicht es, den Verschleiss für Nocken und seinen Abnehmer bei Einnockensteuerung der Ventile gleicher Funktion zu reduzieren. Durch die Zwangsbetätigung eines der beiden Ventile gleicher Funktion wird die Notwendigkeit in zweiten Ventilschliessfeder bzw. eine Verdoppelung der Belastung für Nocken und seinen Abnehmer entfallen.The further development of the invention Claim 2 enables it, the wear and tear for Cam and its customer with cam control of the valves the same Reduce function. By forced operation of one of the two valves the same function becomes the need in the second valve closing spring or a doubling of the load for cams and their customers omitted.

Die Erfindung nach Patentanspruch 2 kann auch in herkömmlichen Ventilsteuerungen mit konventionellem Bewegungsüberträger verwendet werden.The invention according to claim 2 can also in conventional Valve controls with conventional motion transmitters can be used.

Nebenvorteil: die mechanische Verlüste im Ventiltrieb werden dabei auch reduziert.Side advantage: the mechanical losses in the valve train are also reduced.

Claims (3)

Ventilsteuerung für Brennkraftmaschinen mit einem Ventil, das durch eine als Nockenwelle ausgebildete Steuerwelle über ein Bewegungsüberträger betätigt wird, wobei das Max- imum des Ventilhubes nicht durch die Ventilerhebungskurve des Nockens sondern durch die mechanische Sperrung des Ve- ntilschaftes festgelegt wird, dadurch gekennzeichnet, – dass tatsächlicher, d. h. durch die Ventilschaftsperrung begrenzte Ventilhub wird kleiner als ein theoretischer, d. h. durch die Ventilerhebungskurve des Nockens festgelegte Ventilhub ausgelegt; – dass Bewegungsüberträger zwischen den Steuerwelle und Ventil als federnde Bauteil vorgesehen bzw. ausgebildet wird; – dass ein Teil der Ventilerhebungskurve des Nockens und zwar im Bereich der Nockenspitze nicht in Ventilhub umgewandeldt sondern in Übertragungskette zwischen den Steuer welle und Ventil verlieren wird.Valve control for internal combustion engines with a valve which is actuated by a control shaft designed as a camshaft via a motion transmitter, the maximum of the valve lift not being determined by the valve lift curve of the cam but by the mechanical locking of the valve stem, characterized in that - that actual, d. H. valve lift limited by the valve stem lock becomes smaller than a theoretical, i.e. H. valve lift determined by the valve lift curve of the cam; - That motion transmitter between the control shaft and valve is provided or designed as a resilient component; - That part of the valve lift curve of the cam and that in the area of the cam tip is not converted into valve lift but will lose in the transmission chain between the control shaft and valve. Ventilsteuerung nach Anspruch 1, bei welcher ein einziger Bewegungsüberträger zur Betätigung der zwei Ventile gleicher Funktion vorgesehen wird, dadurch gekennzeichnet, dass einer der beiden Ventile gleicher Funktion zwangsweise vom gemeinsamen Bewegungsüberträger betätigt wird. Valve control according to claim 1, wherein a single motion transmitter for Operation of the two valves of the same function are provided, characterized in that that one of the two valves with the same function is forced from common motion transmitter is operated. Ventilsteuerung nach Anspruch 2, dadurch gekennzeichnet, dass ein, das zwangsgeteuerte Ventil und Bewegungsüberträger verbindetes Glied durch die gemeinsamen Federkeile mit dem Ventilschaft gekoppelt und dadurch Drehbar auf dem Ventilschaft gesichert wird.Valve control according to claim 2, characterized in that a, the positively controlled valve and motion transmitter connected member through the common spring wedges with the valve stem coupled and thereby rotatably secured on the valve stem.
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)

Application Number Priority Date Filing Date Title
DE10258901A DE10258901B4 (en) 2002-12-17 2002-12-17 Valve control for a valve of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10258901A DE10258901B4 (en) 2002-12-17 2002-12-17 Valve control for a valve of an internal combustion engine

Publications (2)

Publication Number Publication Date
DE10258901A1 true DE10258901A1 (en) 2004-01-08
DE10258901B4 DE10258901B4 (en) 2004-06-24

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DE10258901A Expired - Fee Related DE10258901B4 (en) 2002-12-17 2002-12-17 Valve control for a valve of an internal combustion engine

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Families Citing this family (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 *

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Publication number Publication date
DE10258901B4 (en) 2004-06-24

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