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DE10140118B4 - Variable deactivatable desmodromic valve control with continuous fully open state of a valve for internal combustion engines - Google Patents

Variable deactivatable desmodromic valve control with continuous fully open state of a valve for internal combustion engines Download PDF

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Publication number
DE10140118B4
DE10140118B4 DE10140118A DE10140118A DE10140118B4 DE 10140118 B4 DE10140118 B4 DE 10140118B4 DE 10140118 A DE10140118 A DE 10140118A DE 10140118 A DE10140118 A DE 10140118A DE 10140118 B4 DE10140118 B4 DE 10140118B4
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Germany
Prior art keywords
valve
stepless
spring
rocker arm
section
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Expired - Lifetime
Application number
DE10140118A
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German (de)
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DE10140118A1 (en
Inventor
Levon Grigorjan
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.)
GRIGORJAN, LEVON, 32584 LOEHNE, DE
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Individual
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Filing date
Publication date
Priority to DE10136155A priority Critical patent/DE10136155B4/en
Priority claimed from DE10136155A external-priority patent/DE10136155B4/en
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Priority to DE10140118A priority patent/DE10140118B4/en
Publication of DE10140118A1 publication Critical patent/DE10140118A1/en
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Publication of DE10140118B4 publication Critical patent/DE10140118B4/en
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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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L1/30—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/13—Throttleless

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

Abstract

Variable abschaltbare desmodromische Ventilsteuerung mit andauerndem voll öffnendem Zustand eines Ventils für Brennkraftmaschinen, bei welcher die Energie der Ventilbetätigungsfeder für den Öffnungsvorgang des Ventils genutzt wird, wobei die Nockenbasis innerhalb des Grundkreises des Nockens als unsymmetrische Ventilbetätigungskurve ausgelegt wird, welche einen Abschnitt für die Öffnungsbewegung, einen Abschnitt für den andauernden volloffenen Zustand des Ventils und einen Abschnitt für die Schließung des Ventils umfasst, wobei zur Erreichung der stufenlosen Ventilhubeinstellung bzw. Deaktivierung des Ventils die Öffnungsbewegung des Kipphebels durch einen Exzenter einer verdrehbahren Welle stufenlos begrenzt bzw. bei geschlossenem Zustand des Ventils gesperrt wird, wobei sich die Ventilsteuerung durch Anordnung der Ventilbetätigungsfeder zwischen Nockenwelle und Kipphebel auszeichnet, und mit einer nicht schlagartigen stufenlosen Ventilhubeinstellung, bei welcher zur Zwangsteuerung von zwei Ventilen gleicher Funktion je ein gemeinsamer Kipphebel, eine gemeinsame Ventilbetätigungsfeder und zwei Nocken genutzt werden, wobei zur Erreichung einer nicht schlagartigen stufenlosen Ventilhubeinstellung die Ventilbetätigungsfeder nicht nur als eine Feder sondern...variable deactivatable desmodromic valve control with continuous full opening Condition of a valve for Internal combustion engine, in which the energy of the valve actuating spring for the opening process the valve is used, with the cam base within the base circle the cam is designed as an asymmetrical valve actuation curve, which a section for the opening movement, a section for the continuous fully open state of the valve and a section for the closure of the valve, wherein to achieve the stepless valve lift setting or Deactivation of the valve the opening movement of the rocker arm by an eccentric verdrehbahren a shaft stepless limited or locked when the valve is closed, wherein the valve timing by arrangement of the valve actuating spring between camshaft and rocker arm, and with a non-impact infinitely variable valve lift, in which for forced control two common valves each having a common rocker arm, a common valve actuating spring and two cams are used, to achieve a not abrupt stepless valve lift adjustment the valve actuator spring not just as a spring but ...

Figure 00000001
Figure 00000001

Description

Es sind desmodromische Ventilsteuerungen bekannt, bei welchen je zwei Nocken und ein Kipp- oder Schlepphebel zur Zwangssteuerung des Tellerventils einer Brennkraftmaschine genutzt werden. Als eine Offenbarung, die sich auf solche Typen von Anordnungen bezieht, kann auf DE 689 18 317 T2 Bezug genommen werden.There are desmodromic valve controls are known in which each two cams and a rocker or rocker lever are used to force control of the poppet valve of an internal combustion engine. As a disclosure relating to such types of arrangements, may DE 689 18 317 T2 Be referred.

Allerdings haben solche Anordnungen folgende Probleme mit sich gebracht:
Ein komplizierter Übertragungshebel, welcher artbedingt aus Anhebungs- bzw. Schließ- Hebeln zusammengesetzt wird,
enormer Herstellungsaufwand, der notwendig ist, um unterschiedliche Material- bzw. Temperaturbedingte Ausdehnungen von Nocken, Hebel usw. auszugleichen bzw. vorzubeugen,
ein mit der Zeit auftretender lokaler Verschleiß, welcher zu einer Vergrößerung von Spielräumen in der Übertragungskette zwischen Nockenwelle und Ventil oder zu einem Verlust der Dichtwirkung durch das Ventil führen kann.However, such arrangements have brought the following problems:
A complicated transmission lever, which is composed of raising and closing levers,
enormous manufacturing effort, which is necessary to balance or prevent different material or temperature-related expansions of cams, levers, etc.
a localized wear occurring over time, which can lead to an increase of margins in the transmission chain between the camshaft and valve or to a loss of the sealing effect through the valve.

Es ist eine Aufgabe der vorliegenden Erfindung, eine Ventilanhebung/Schließanordnung der Art zu schaffen, bei welcher eine Zwangssteuerung des Ventils mittels zweier Nocken ohne vorstehend genannten Nachteilen möglich wird.It It is an object of the present invention to provide a valve lift / latch assembly the way to create, in which a forced control of the valve by means of two cams without the aforementioned disadvantages is possible.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, dass eine Ventilbetätigungsfeder derart in der Übertragungskette von Nockenwelle zu Ventil integriert wird, dass auf Grund der Federelastizität die Zweinockensteuerung des Ventils ohne steuerungstypische Nachteile möglich ist.These Task is according to the invention solved by that a valve actuating spring so in the transmission chain From camshaft to valve is integrated, that due to the spring elasticity, the two-cam control the valve without control-typical disadvantages is possible.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt Es zeigenOne embodiment The invention is illustrated in the drawing

1 Ventilsteuerung nach Patentanspruch 1 Valve control according to claim

Es bedeutenIt mean

11
VentilbetätigungsfederValve actuating spring
AA
Schließnockenclosing cam
BB
Aufhebungsnockencancel cam

Claims (1)

Variable abschaltbare desmodromische Ventilsteuerung mit andauerndem voll öffnendem Zustand eines Ventils für Brennkraftmaschinen, bei welcher die Energie der Ventilbetätigungsfeder für den Öffnungsvorgang des Ventils genutzt wird, wobei die Nockenbasis innerhalb des Grundkreises des Nockens als unsymmetrische Ventilbetätigungskurve ausgelegt wird, welche einen Abschnitt für die Öffnungsbewegung, einen Abschnitt für den andauernden volloffenen Zustand des Ventils und einen Abschnitt für die Schließung des Ventils umfasst, wobei zur Erreichung der stufenlosen Ventilhubeinstellung bzw. Deaktivierung des Ventils die Öffnungsbewegung des Kipphebels durch einen Exzenter einer verdrehbahren Welle stufenlos begrenzt bzw. bei geschlossenem Zustand des Ventils gesperrt wird, wobei sich die Ventilsteuerung durch Anordnung der Ventilbetätigungsfeder zwischen Nockenwelle und Kipphebel auszeichnet, und mit einer nicht schlagartigen stufenlosen Ventilhubeinstellung, bei welcher zur Zwangsteuerung von zwei Ventilen gleicher Funktion je ein gemeinsamer Kipphebel, eine gemeinsame Ventilbetätigungsfeder und zwei Nocken genutzt werden, wobei zur Erreichung einer nicht schlagartigen stufenlosen Ventilhubeinstellung die Ventilbetätigungsfeder nicht nur als eine Feder sondern auch als zweiarmiger Pendelhebel verwendet wird, dessen Pendelbewegungen innerhalb der gesamten Ventilbetätigungszeit in Zusammenarbeit der Ventilbetätigungsfeder mit zwei Nocken A und B der Nockenwelle erreicht werden.Variable deactivatable desmodromic valve control with continuous full opening Condition of a valve for Internal combustion engine, in which the energy of the valve actuating spring for the opening process the valve is used, with the cam base within the base circle the cam is designed as an asymmetrical valve actuation curve, which a section for the opening movement, a section for the continuous fully open state of the valve and a section for the closure of the valve, wherein to achieve the stepless valve lift setting or Deactivation of the valve the opening movement of the rocker arm by an eccentric verdrehbahren a shaft stepless limited or locked when the valve is closed, wherein the valve timing by arrangement of the valve actuating spring between camshaft and rocker arm is distinguished, and with a not sudden stepless valve lift, in which the Forced control of two valves with the same function one common each Rocker arm, a common valve actuating spring and two cams used being to achieve a non-impact stepless Valve Stroke setting not only the valve operating spring as a spring but also as a two-armed pendulum lever is used its oscillations within the entire valve actuation time in cooperation of the valve actuating spring be achieved with two cams A and B of the camshaft.
DE10140118A 2000-03-09 2001-08-16 Variable deactivatable desmodromic valve control with continuous fully open state of a valve for internal combustion engines Expired - Lifetime DE10140118B4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10136155A DE10136155B4 (en) 2000-03-09 2001-07-25 Valve control for a gas exchange valve of an internal combustion engine
DE10140118A DE10140118B4 (en) 2001-07-25 2001-08-16 Variable deactivatable desmodromic valve control with continuous fully open state of a valve for internal combustion engines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10136155A DE10136155B4 (en) 2000-03-09 2001-07-25 Valve control for a gas exchange valve of an internal combustion engine
DE10140118A DE10140118B4 (en) 2001-07-25 2001-08-16 Variable deactivatable desmodromic valve control with continuous fully open state of a valve for internal combustion engines

Publications (2)

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DE10140118A1 DE10140118A1 (en) 2002-06-13
DE10140118B4 true DE10140118B4 (en) 2006-03-16

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018204597B4 (en) * 2018-03-27 2021-01-14 Audi Ag Valve drive for an internal combustion engine and a corresponding internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061981A1 (en) * 1969-12-16 1971-06-24 Thomson Csf Diode phase shifter
DE68918317T2 (en) * 1988-03-28 1995-01-19 Nissan Motor Control arrangement for poppet valves of an internal combustion engine and the like.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061981A1 (en) * 1969-12-16 1971-06-24 Thomson Csf Diode phase shifter
DE68918317T2 (en) * 1988-03-28 1995-01-19 Nissan Motor Control arrangement for poppet valves of an internal combustion engine and the like.

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Publication number Publication date
DE10140118A1 (en) 2002-06-13

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