EP1350928A2 - Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne - Google Patents

Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne Download PDF

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Publication number
EP1350928A2
EP1350928A2 EP03007234A EP03007234A EP1350928A2 EP 1350928 A2 EP1350928 A2 EP 1350928A2 EP 03007234 A EP03007234 A EP 03007234A EP 03007234 A EP03007234 A EP 03007234A EP 1350928 A2 EP1350928 A2 EP 1350928A2
Authority
EP
European Patent Office
Prior art keywords
valve
counter
lift
linear cam
sense
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
EP03007234A
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German (de)
English (en)
Other versions
EP1350928B1 (fr
EP1350928A3 (fr
Inventor
Willi Roth
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Individual
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Individual
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Publication of EP1350928A3 publication Critical patent/EP1350928A3/fr
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Publication of EP1350928B1 publication Critical patent/EP1350928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/20—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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • F01L13/0005—Deactivating 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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

Definitions

  • the invention relates to a device for variable actuation a lift valve, in particular an inlet and / or outlet valve an internal combustion engine, with one in the drive train between one arranged oscillating actuator device and the lift valve, Floating linear cam, which on the one hand with a stationary counterpart in the sense of the valve lift and on the other hand with a drive that is movable in the sense of the valve lift interacts with the counter valve connected and with at least one lifting movement in the sense of Ventilhubs movable counter-organ accomplishing control curve is provided, the lifting movement by a in the sense of Linocock reciprocating movement taking place Relative movement between the linear cam and at least one a mating member assigned to a control curve can be varied.
  • the linear cam is used as a sliding shoe formed with a sliding surface on a on the globe valve acting actuator rests and one with a associated cam of a camshaft interacting thrust surface and also has a control curve opposite this, the interacts with a feeler roller that is fixed in height and in Direction of the reciprocating movement of the linear cam is adjustable. Precise guidance of the linear cam is only guaranteed here as long as it is with each of its three flanks is in contact with the associated counter element. Otherwise, the linear cam would flutter and with it there is a high level of noise and a risk of malfunction. In the known arrangement, therefore, even when closed Lift valve no play between the linear cam and the assigned Adverse organs are permitted, which is particularly important for Achieving a so-called zero stroke high demands in terms of component accuracy and therefore high production costs caused.
  • the linear cam is here due to its articulation on the Swivel lever reliably guided and secured in any case, see above that when the valve is closed there is also play compared to the stationary one or movable counter organ, what accomplishing an operation from zero stroke to Maximum stroke and vice versa simplified and even at high Speeds ensures high reliability.
  • the adjustability the pivot axis and / or the pivot angle of the Swivel lever and thus the linear cam enables in advantageously one in the sense of the back and forth Movement of the linear cam stationary arrangement of both Counter organs, which results in a simple and compact design and ensures gentle operation.
  • adjustable Pivot angle of the pivot lever can be the pivot axis be arranged stationary.
  • the swivel lever can be advantageous on a rotatable Eccentric shaft can be mounted, for the radial adjustment of the Swivel bearing is rotatable.
  • a rotary movement of the eccentric shaft can be comparatively simple and accurate in an advantageous manner accomplish. At the same time, it is extremely robust.
  • the eccentric shaft can expediently on a motor via the Go through engine length and the stroke valves in the engine longitudinal direction assigned cylinders arranged one behind the other Pick up the swivel lever. This results in a particularly simple and compact design, one with an eccentric shaft and one this associated actuating device manages.
  • rocker arm can be used in a proven meadow be pivotally mounted on a so-called hydraulic base, which in turn is received in a rotatable eccentric bushing.
  • the a control cam in the sense of the valve stroke movable counter-organ assigned to the linear cam.
  • the control curve can expediently move from one to the other Support curve essentially parallel locking section, an adjoining ramp section and one have adjoining lifting section.
  • the rest section is assigned an operating mode with zero stroke.
  • the lifting section accomplishes the stroke of the associated globe valve.
  • the the ramp section provided between them results in a slow Opening and closing movement of the globe valve, so that shocks and Noise and a possible rebound of the lift valve reliably remain under.
  • the stationary counterpart in the sense of the valve lift is expedient a support curve opposite the control curve Assigned linear cam, which is appropriately designed such that it alone does not cause a valve lift and that when the valve is closed
  • Lift valve existing play between the linear cam and the Counter organs in every position of the adjustable swivel bearing the pivot lever is substantially the same. This gives one gentle operation with the required accuracy.
  • Another appropriate measure can be that the Axis of the eccentric shaft in one plane with the axis as Actuator device provided camshaft is arranged.
  • the said plane can be formed as a part of the housing, which facilitates the storage of the eccentric shaft and the camshaft.
  • an adjustable swivel angle of the Swivel lever can be an actuator device with adjustable Stroke, e.g. a linear motor can be provided.
  • a camshaft will can advantageously be dispensed with.
  • the main field of application of the invention is as gasoline engines Trained piston engines, preferably in the form of automotive engines.
  • the basic structure and the mode of operation of such Motors are known per se and therefore need this No more detailed connection.
  • the motor on which FIG. 1 is based has several in series cylinders 1 arranged one behind the other, with inlet and outlet channels 2 are provided, each of which is opened and closed by a globe valve 3 are taxable.
  • the lift valve 3 has one with a valve seat 4 interacting valve plate 5, from which a stem 6 protrudes, which is mounted in a housing-side bearing bush 7 and at the attacks a valve actuating device at the upper end.
  • the Camshaft 8 is appropriately placed so that its axis is coplanar to the axes of the associated valves 3.
  • the Valve actuator also includes a two-armed Swivel lever 10, the one on the camshaft 8 facing here upper end one with the associated cam 9 of Camshaft 8 cooperating feeler roller 11 carries and at the opposite, lower end here a linear cam 12 by means of a pivot bearing is pivotally articulated.
  • the swivel lever 10 is useful an auxiliary spring, not shown here assigned, which touch roller 11 in contact with the assigned Cam 9 of the camshaft 8 holds.
  • the linear cam articulated to the lower end of the pivot lever 10 12 engages with a wedge-like area between two counter organs in the form of a stationary bearing on all sides in the motor housing Roller 13 and one of these opposite, in the sense of the lifting movement of the valve 3 movable roller 14.
  • This is on a rocker arm 15 designed as a one-armed rocker arm rotatably mounted, which in turn at its end remote from the valve is pivotally mounted and with its opposite end region acts on the upper end of the valve stem 6.
  • the oscillating cam 9 of the rotating camshaft 8 causes a pivoting movement of the pivot lever 10, which in turn is a back and forth movement of the linear cam 12 causes.
  • the oscillating cam 9 of the rotating camshaft 8 causes a pivoting movement of the pivot lever 10, which in turn is a back and forth movement of the linear cam 12 causes.
  • There this with its upper flank on the stationary in the housing Roller 13 is supported, is effected between the rollers 13, 14 engaging, wedge-shaped section an evasive movement of on the tiltable rocker arm 15, lower roller 14 and thus a rocking movement of the rocker arm 15, which on the Valve 3 is transmitted and a corresponding valve lift causes.
  • the valve 3 counteracts the force a return spring 16, indicated only schematically, which when the linear cam 12 moves backwards, the valve 3 tracks and closes.
  • variable actuation of the valve 3 that is to say a variable one
  • the linear cam will enable stroke and variable opening times 12 adjusted so that it moves back and forth at a constant stroke going movement with its wedge-shaped area more or less far between the rollers acting as counter organs 13 and 14 is retracted.
  • the Axis of the pivot lever 10 in the radial direction parallel to itself itself shifted, as indicated in Figure 1 at a.
  • the axis of the pivot lever 10 can engage the Linear cam 12 between the associated counter organs too by changing the pivoting angle of the pivoting lever 10 to be changed.
  • a reversing motion executing linear motor for example inform of a hydraulic or pneumatic cylinder or of an electric solenoid etc., the stroke of which is provided, e.g. is changeable depending on the desired filling.
  • camshaft 8 i.e. the axis of the Camshaft 8, similar to the axis of the pivot lever 10 in radial direction to move parallel to itself.
  • the pivot lever 10 is on one Camshaft 8 parallel eccentric shaft 17 mounted to accomplish the desired displacement of the pivot bearing axis of the pivot lever 10 is rotatable.
  • the eccentric shaft 17 goes as can best be seen from FIG. 2, expediently via the Length of the assigned motor and takes all the Lift valves 3 assigned to the cylinders 1 arranged one behind the other Swing lever 10 on.
  • the eccentric shaft 17 is a function of the position Filling control element, for example the accelerator pedal Motor vehicle rotatable.
  • the eccentric shaft 17 provided with a swivel arm 18 on which a by means of the accelerator pedal actuates linkage 19.
  • the eccentric shaft 17 Servo drive in the form of an influence that can be influenced by means of the accelerator pedal etc. Assign control motor.
  • the eccentric shaft 17 and the camshaft 8 are, like the figures 1 and 2 can be seen further, arranged coplanar.
  • the engine case is, as can best be seen from FIG. 1, along this Level divided.
  • the parting line 20 thus formed facilitates the housing side Bearing of the camshaft 8 and the eccentric shaft 17.
  • the one facing the universally stationary, merely rotatable roller 13, upper edge of the linear cam 12 is as a support curve 21 trained in cooperation with the associated role 13th has not yet caused a valve lift.
  • a support curve 21 trained in cooperation with the associated role 13th has not yet caused a valve lift.
  • the Support curve 21 has an upwardly concave contour.
  • the control curve 22 has a downwardly concave contour, being in the front, that is from the linkage to the Swing lever 10 distant area an approximately parallel course of Support curve 21 and control curve 22 can be provided.
  • the control curve 22 contains, as can best be seen from FIG. 3 is three adjoining areas, namely a front, that is, detent section 23 removed from the bearing, one adjoining ramp section 24 and one to this subsequent lifting section 25 facing the bearing
  • latching section 23 has one for the front Area of the opposite support curve 21 approximately parallel or, in contrast, only a slightly divergent course.
  • the support curve 21 opposite the control curve 22 is so trained that, as mentioned above, they alone had no hub of the valve. This simplifies the configuration of the control curve 22.
  • the support curve 21 is expediently designed such that the existing game between the Linear cam 12 and the counter organs assigned to it Rollers 13, 14 in each position of the adjustable Pivot bearing of the pivot lever 10 remains essentially the same.
  • the eccentric shaft 17 rotates in this way, that is, the pivot axis of the pivot lever 10 is moved so that the linear cam 12 with rotating camshaft 8 only with the locking section 23 of the Control curve 22 and the opposite portion of the camber curve 21 gets between the rollers 13, 14, as above has already been mentioned, the valve 3 is not open, that is, it is a zero stroke before. The further the linear cam 12 between the Rollers 13, 14 engages, the more valve 3 is opened.
  • the eccentric shaft 17 that is, by radial Displacement of the pivot axis of the pivot lever 10 can therefore the valve lift and valve opening times can be varied. The same naturally applies to a change in the stroke of the Actuator.
  • the rocker arm 15 consists, as can be seen from FIG. 2, of two parallel side legs 15a, b, as shown in Figure 1, through a rear and front yoke are connected. Between the side legs 15a, b of the linear cam 12 and that as this assigned counter organs acting roles 13, 14 engage what results in a very compact arrangement.
  • the front yoke is like FIG. 1 shows, as an adjoining the upper end of the valve stem 6, convex web 26 formed.
  • the rear yoke is like Figure 1 further shows, formed as a bearing pan 27 with which the rocker arm 15 on the bearing head of a bearing base accommodated in the housing 28 is stored.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP03007234A 2002-04-06 2003-04-01 Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne Expired - Lifetime EP1350928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10215281 2002-04-06
DE10215281A DE10215281A1 (de) 2002-04-06 2002-04-06 Vorrichtung zum stufenlosen Variieren der Ventilerhebung in Verbrennungsmotoren

Publications (3)

Publication Number Publication Date
EP1350928A2 true EP1350928A2 (fr) 2003-10-08
EP1350928A3 EP1350928A3 (fr) 2003-12-10
EP1350928B1 EP1350928B1 (fr) 2006-09-27

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EP03007234A Expired - Lifetime EP1350928B1 (fr) 2002-04-06 2003-04-01 Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne

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EP (1) EP1350928B1 (fr)
DE (2) DE10215281A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067924A1 (fr) * 2003-01-28 2004-08-12 Fev Motorentechnik Gmbh Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable
EP1748160A1 (fr) * 2005-07-28 2007-01-31 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Commande de soupape variable pour moteur à combustion interne
EP1772597A2 (fr) * 2005-10-04 2007-04-11 Masaaki Yoshikawa Distribution de moteur à combustion interne à quatre temps
EP1793098A2 (fr) * 2005-12-05 2007-06-06 Delphi Technologies, Inc. Système de commande de soupapes à actionnement variable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261304B4 (de) * 2002-12-27 2009-01-22 BÖSL-FLIERL, Gerlinde Ventilhubvorrichtung zur variablen Ventilsteuerung der Gaswechselventile einer Verbrennungskraftmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911879A (en) * 1973-07-13 1975-10-14 Daimler Benz Ag Valve adjustment mechanism for internal combustion engine
US4205634A (en) * 1978-02-17 1980-06-03 Tourtelot Edward M Jr Variable valve timing mechanism
US4459946A (en) * 1982-05-17 1984-07-17 Investment Rarities, Incorporated Valve actuating apparatus utilizing a multi-profiled cam unit for controlling internal combustion engines
US4469056A (en) * 1983-02-22 1984-09-04 Tourtelot Jr Edward M Dual follower variable valve timing mechanism
US5027760A (en) * 1988-01-19 1991-07-02 Franco Storchi Variable timing system for engine valve operating gear
US5119773A (en) * 1988-10-01 1992-06-09 Peter Kuhn Apparatus for operating the valves on internal combustion engines with a variable valve lift curve
DE4135257A1 (de) * 1991-10-25 1993-04-29 Peter Prof Dr Ing Kuhn Vorrichtung zur betaetigung der ventile in verbrennungsmotoren mittels umlaufender nocken
DE4326331A1 (de) * 1992-07-15 1995-02-09 Bayerische Motoren Werke Ag Ventiltrieb einer Brennkraftmaschine
DE10040544A1 (de) * 2000-08-18 2002-02-28 Schaeffler Waelzlager Ohg Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911879A (en) * 1973-07-13 1975-10-14 Daimler Benz Ag Valve adjustment mechanism for internal combustion engine
US4205634A (en) * 1978-02-17 1980-06-03 Tourtelot Edward M Jr Variable valve timing mechanism
US4459946A (en) * 1982-05-17 1984-07-17 Investment Rarities, Incorporated Valve actuating apparatus utilizing a multi-profiled cam unit for controlling internal combustion engines
US4469056A (en) * 1983-02-22 1984-09-04 Tourtelot Jr Edward M Dual follower variable valve timing mechanism
US5027760A (en) * 1988-01-19 1991-07-02 Franco Storchi Variable timing system for engine valve operating gear
US5119773A (en) * 1988-10-01 1992-06-09 Peter Kuhn Apparatus for operating the valves on internal combustion engines with a variable valve lift curve
DE4135257A1 (de) * 1991-10-25 1993-04-29 Peter Prof Dr Ing Kuhn Vorrichtung zur betaetigung der ventile in verbrennungsmotoren mittels umlaufender nocken
DE4326331A1 (de) * 1992-07-15 1995-02-09 Bayerische Motoren Werke Ag Ventiltrieb einer Brennkraftmaschine
DE10040544A1 (de) * 2000-08-18 2002-02-28 Schaeffler Waelzlager Ohg Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067924A1 (fr) * 2003-01-28 2004-08-12 Fev Motorentechnik Gmbh Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable
CN100460633C (zh) * 2003-01-28 2009-02-11 Fev电机技术有限公司 供具有可调气门间隙补偿装置的活塞内燃机用的全可变机械气门驱动机构
EP1748160A1 (fr) * 2005-07-28 2007-01-31 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Commande de soupape variable pour moteur à combustion interne
EP1772597A2 (fr) * 2005-10-04 2007-04-11 Masaaki Yoshikawa Distribution de moteur à combustion interne à quatre temps
EP1772597A3 (fr) * 2005-10-04 2009-11-04 Masaaki Yoshikawa Distribution de moteur à combustion interne à quatre temps
EP1793098A2 (fr) * 2005-12-05 2007-06-06 Delphi Technologies, Inc. Système de commande de soupapes à actionnement variable
EP1793098A3 (fr) * 2005-12-05 2009-09-09 Delphi Technologies, Inc. Système de commande de soupapes à actionnement variable

Also Published As

Publication number Publication date
EP1350928B1 (fr) 2006-09-27
DE10215281A1 (de) 2003-10-16
EP1350928A3 (fr) 2003-12-10
DE50305150D1 (de) 2006-11-09

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