WO2006119883A1 - Dispositif d'actionnement de soupape d'echange de gaz - Google Patents

Dispositif d'actionnement de soupape d'echange de gaz Download PDF

Info

Publication number
WO2006119883A1
WO2006119883A1 PCT/EP2006/004061 EP2006004061W WO2006119883A1 WO 2006119883 A1 WO2006119883 A1 WO 2006119883A1 EP 2006004061 W EP2006004061 W EP 2006004061W WO 2006119883 A1 WO2006119883 A1 WO 2006119883A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas exchange
exchange valve
support
support unit
switching means
Prior art date
Application number
PCT/EP2006/004061
Other languages
German (de)
English (en)
Inventor
Hans Kofler
Christoph Reckzügel
Original Assignee
Daimlerchrysler 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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006119883A1 publication Critical patent/WO2006119883A1/fr

Links

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
    • 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
    • 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
    • F01L1/185—Overhead end-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
    • F01L1/20—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
    • 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
    • F01L13/0031—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 tappet or pushrod length
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

Definitions

  • the invention relates to a Gas batventilbetusch whysvor- device according to the preamble of patent claim 1.
  • a Gas batventilbetuschi- device which comprises a cooperating with an overhead camshaft, lever-like cam follower.
  • the cam follower is supported at a first end on a valve stem of a gas exchange valve and with a second end on a further component.
  • the invention is in particular the object of providing a switchable gas exchange valve actuating device, which is particularly advantageous adaptable to existing boundary conditions and / or requirements.
  • the object is achieved in each case by the features of the independent patent claims, while further embodiments of the invention can be taken from the subclaims.
  • a gas exchange valve actuating device with at least one cooperating with a lever-like cam follower, switchable first support unit having at least one gas exchange valve intermediate stroke associated support position.
  • a “Gas Cauventil formathub” between a full stroke and a maximum paint stroke and a zero stroke or a stationary gas exchange valve lying intermediate stroke of a gas exchange valve are understood.
  • the support unit can be arranged on a gas exchange valve side facing the cam follower and / or particularly advantageous on a gas exchange valve side facing away from the cam follower, whereby a particularly compact design can be achieved.
  • a particularly space-saving or packaging-optimized Gas batventilbetusch Trentsvor- direction can be provided, which can be adapted to existing boundary conditions and / or requirements advantageous, and it can for swirl, turbulence, residual gas and / or torque optimization application trap, etc.
  • adapted Gas batventilhübe be realized, in particular, when the first support unit is provided for the realization of at least three different Gas bayventilh according.
  • the term "intended” should be understood to mean in particular specifically “equipped” and / or "designed”.
  • the first support unit has at least one mechanical switching means for limiting a movement stroke of a support means of the first support unit, whereby constructively simple precise and reproducible support positions can be achieved.
  • the first support unit can be provided in at least one area for a continuous Gas bayventilhubumschal- device, for example by the mechanical switching means is designed with an integrally formed inclined surface, and / or the first support unit may preferably be provided for a stepped Gas bayventilhubumscrien, which in turn advantageously to a simple reproducible contributes.
  • other switching means which appear expedient to the person skilled in the art are conceivable, for example hydraulic switching means in which supporting forces can be supported via adjustable hydraulic pistons, electromagnetic switching means, etc.
  • the mechanical switching means is assigned to at least one second support unit in addition to the first support unit, whereby additional components, space, weight, assembly costs and costs can be saved.
  • the mechanical switching means is arranged under the at least two support units, this can be integrated particularly advantageously into existing systems and a coupling between the support means and the mechanical switching means can easily be achieved.
  • the mechanical switching means may be provided for rotary and / or translational actuation, wherein in the latter with particularly simple control mechanisms tolerance-insensitive switch positions and the switch positions particularly precise Gas monventilhübe are achievable.
  • the mechanical switching means can be arranged in various recesses of an internal combustion engine unit which appear meaningful to the person skilled in the art. However, if the mechanical switching means is arranged in a deep hole bore of an internal combustion engine, cost-effective integration, in particular also with existing systems, and simple assembly can be achieved. If the mechanical switching means is guided over a guide groove, a particularly precise guidance can be realized.
  • the guide groove can in particular in addition to the deep hole in the engine unit and / or the guide groove can be introduced into the mechanical switching means.
  • FIG. 1 shows a detail of an internal combustion engine with a partially schematically represented gas exchange venting device
  • FIG. 2 is a perspective view of individual components of the internal combustion engine and the Gas Cartventilbe- actuating device of Figure 1,
  • FIG. 3 shows a schematically illustrated support unit with a mechanical switching means of the gas exchange valve actuation device in a support position associated with a gas exchange valve full stroke
  • FIG. 4 shows the support unit from FIG. 3 in an unlocked state associated with a gas exchange valve zero stroke
  • FIG. 5 shows the support unit from FIG. 3 in a state associated with a gas exchange valve intermediate stroke
  • FIG. 6 shows the support unit from FIG. 3 in a support position associated with the gas exchange valve intermediate stroke.
  • 1 shows a detail of an internal combustion engine of a motor vehicle with a gas exchange valve actuating device according to the invention.
  • the Gas Poventilbet2011i- device comprises two arranged in one half of a cylinder head 19, overhead camshafts 22 and per gas exchange valve 20, 21 designed as a cam follower cam followers 10, 11 ( Figures 1 and 2).
  • the camshaft 22 is arranged in an installed position above the cam followers 10, 11.
  • the camshaft 22 interacts with its cams 23 in each case with the cam followers 10, 11.
  • the cam followers 10, 11 are on their sides facing away from the gas exchange valves 20, 21 sides via hydraulic, switchable support units 12, 13 on the cylinder head 19 and on their gas exchange valves 20, 21 facing sides on Gas monventilkitften 24, 25 supported while the cam 23 of the camshaft 22nd in the central region of the cam followers 10, 11 via rollers mounted rollers 26, 27 with the cam followers 10, 11 cooperate.
  • the detailed construction and the function are described below in principle based on the cam follower 10 and the support unit 12.
  • the support units 12, 13 and the cam followers 10 and 11 are each of identical construction, so that with respect to the description of the cam follower 11 and the support unit 13 may be made to the description of the cam follower 10 and the support unit 12 or components of the cam follower 10 and the support unit 12 are representative of corresponding components of the cam follower 11 and the support unit 13 may be mentioned.
  • the camshaft 22 is designed as a hollow shaft and has a camshaft passage 28 extending in the axial direction through the camshaft 22, wherein the support unit 12 of the gas exchange valve 20 is coupled via the camshaft passage 28 with a pressure medium supply formed by a pump.
  • transverse channels 29 formed by three-dimensional space bores in the cylinder head 19 are each guided by the camshaft channel 28, starting from bearing points of the camshaft 22, to the support units 12, 13 (FIG. 1).
  • the transverse channel 29 form part of a pressure medium supply circuit of a lash adjuster 30 of the support unit 12.
  • the clearance compensation element 30 is arranged within a support means 16 formed by a piston, the support means 16 being arranged within a further support means 31 of the support unit 12 formed by a cylinder (FIG. 1).
  • the clearance compensation element 30 comprises a guided in the support means 16 compensating piston 32, a first coupled to the transverse channel 29 pressure chamber 33 and a second pressure chamber 34 which is bounded by a bottom part 35 of the support means 16 and the one controlled by a spring-loaded valve ball 36 compensation channel 37th of the clearance compensation element 30 is in operative connection with the first pressure chamber 33.
  • the second pressure chamber 34 is connected via a throttle channel, which is realized by a bearing point of the balance piston 32 in the support means 16, with a tank.
  • camshaft channel 28 via a further channel, not shown, and a solenoid valve with a pressure medium supply circuit 38 of the support unit 12 formed by a circuit coupled.
  • the gas exchange valve 20 are actuated with a full stroke, prevails in the pressure medium supply circuit 38 formed by the circuit throttled by a throttle of the solenoid valve pressure.
  • the pressure medium supply circuit of the lash adjuster 30 branches off before the solenoid valve or is not guided over the same.
  • the pressure medium supply circuit formed by the circuit 38 and in the pressure medium supply circuit of the lash adjuster 30 prevail in operation at full stroke activated gas exchange valve 20 different pressures, in the pressure medium supply circuit of the lash adjuster 30, a greater pressure than in the circuit formed by the pressure medium supply circuit 38.
  • the circuit formed by the pressure medium supply circuit 38 and the pressure medium supply circuit of the lash adjuster 30 are thus formed double-ended.
  • Each support unit 12, 13 has a arranged in a cylindrical extension 39, 40, not shown on switching pin.
  • the shift pin is loaded by a spring element in the direction of its locking positions. Further, the shift pin is coupled on its opposite side of the spring element via a channel formed by a deep hole in the cylinder head 19 channel 41 with the solenoid valve and loaded by a formed in the circuit pressure medium supply circuit 38 pressure in the direction of its unlocked position.
  • the shift pin is in its locking position, the support means 16 is fixed by means of the shift pin within the support means 31 and the gas exchange valve 20 is actuated with a full stroke ( Figures 1, 2 and 3).
  • the solenoid valve is switched over and the pressure medium supply circuit 38 is acted upon via the solenoid valve directly with the pressure prevailing in the camshaft channel 28.
  • the switching pin is moved counter to the spring force of the spring element in its unlocked position, so that the support means 16 of the support unit 12 during operation against a spring force of a spring element 42 of the support unit 12 can dip into the support means 31 and an actuation of the gas exchange valve 20 is omitted ( Figures 1 , 2 and 4).
  • the support units 12, 13 each have a gas exchange valve intermediate stroke associated support position 14 ( Figures 5 and 6).
  • the support units 12, 13 have a common mechanical switching means 15 formed by a lifting rod.
  • the switching means 15 is used to limit a movement stroke of the support means 16 of the support unit 12.
  • the mechanical switching means 15 is viewed in the installed position under the support units 12, 13 arranged in a deep hole 17 in the cylinder head 19 ( Figure 1).
  • the mechanical switching means 15 has a rectangular profile with each in the region of the support units 12, 13 integrally formed extensions 43, 44.
  • the extension 43 points in the direction of the support means 16 and the extension 44 points in the direction away from the support means 16 (FIGS. 5 and 6).
  • the height of the protrusion 43 pointing in the direction of the support means 16, together with an extension 45 oriented towards the bottom part 35 of the support means 16 and pointing in the direction of the mechanical switching means 15, determines an adjustment dimension for the gas exchange valve intermediate stroke or how far the gas exchange valve 20 opens in an intermediate stroke mode becomes.
  • the extension 44 serves as a guide means by this engages in an introduced into the cylinder head 19 guide groove 18.
  • the guide groove 18 is introduced in the region of the support unit 12 in a wall of the deep hole bore 17 and extends in the longitudinal direction slightly beyond an axial switching path of the switching means 15 also, which is provided for translational actuation.
  • the gas exchange valve 20 If the gas exchange valve 20 is to be operated with the gas exchange valve intermediate stroke, its movement stroke is limited in the unlocked state of the support means 16 by the mechanical switching means 15 being displaced translationally by about 4 mm to 5 mm by means of a vacuum unit 46, so that the extension 43 of the mechanical switching means 15 under the extension 45 of the support means 16 comes to rest ( Figures 5 and 6). A full stroke of the support means 16 is avoided and the Gascicventil formathub associated support position 14 is activated ( Figure 6). A rest stroke of the support means 16 determines an opening duration and an opening stroke of the gas exchange valve 20.
  • the support unit 12 is provided for a stepped Gas sequentialventilhubumscnies, namely by means of the support unit 12 a full-stroke, a Swisshub- and a zero-stroke operation of the gas exchange valve 20 can be realized.
  • the actuation of the gas exchange valve 20 with a Gas pluripotentil formathub is preferably limited to a specific operating range.
  • the solenoid valve is switched again, so that in turn established in the pressure medium supply circuit 38 formed by the circuit a throttled pressure and the shift pin by means of the spring element against the throttled pressure in the pressure medium supply circuit 38 in his Ver. be moved locking position and can engage in the support means 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un dispositif d'actionnement de soupape d'échange de gaz comprenant au moins une première unité d'appui (12) commutable coopérant avec un galet suiveur (10) de type levier, cette unité d'appui ayant au moins une position d'appui (14) associée à une course intermédiaire de la soupape d'échange de gaz.
PCT/EP2006/004061 2005-05-06 2006-04-29 Dispositif d'actionnement de soupape d'echange de gaz WO2006119883A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021114.3 2005-05-06
DE102005021114A DE102005021114A1 (de) 2005-05-06 2005-05-06 Gaswechselventilbetätigungsvorrichtung

Publications (1)

Publication Number Publication Date
WO2006119883A1 true WO2006119883A1 (fr) 2006-11-16

Family

ID=36678592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004061 WO2006119883A1 (fr) 2005-05-06 2006-04-29 Dispositif d'actionnement de soupape d'echange de gaz

Country Status (2)

Country Link
DE (1) DE102005021114A1 (fr)
WO (1) WO2006119883A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017205155A1 (de) 2017-03-27 2018-09-27 Mahle International Gmbh Ventiltrieb für eine Brennkraftmaschine
DE102017205151A1 (de) 2017-03-27 2018-09-27 Mahle International Gmbh Ventiltrieb für eine Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567861A (en) * 1982-08-17 1986-02-04 Nissan Motor Co., Ltd. Engine valve operating system for internal combustion engine
DE4000531A1 (de) * 1990-01-10 1990-06-13 Roland Schmidt Verstellvorrichtung zur veraenderung von ventilsteuerzeiten und ventilhub
US5720244A (en) * 1995-01-11 1998-02-24 Ina Walzlager Schaeffler Kg Switchable support element
FR2787136A1 (fr) * 1998-12-11 2000-06-16 Joel Bourdeau Dispositif de variation de la distribution d'un moteur thermique a soupapes commandees
US6314927B1 (en) * 1998-04-29 2001-11-13 Ina Walzlager Schaeffler Ohg Support element for a finger lever of a valve gear of an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567861A (en) * 1982-08-17 1986-02-04 Nissan Motor Co., Ltd. Engine valve operating system for internal combustion engine
DE4000531A1 (de) * 1990-01-10 1990-06-13 Roland Schmidt Verstellvorrichtung zur veraenderung von ventilsteuerzeiten und ventilhub
US5720244A (en) * 1995-01-11 1998-02-24 Ina Walzlager Schaeffler Kg Switchable support element
US6314927B1 (en) * 1998-04-29 2001-11-13 Ina Walzlager Schaeffler Ohg Support element for a finger lever of a valve gear of an internal combustion engine
FR2787136A1 (fr) * 1998-12-11 2000-06-16 Joel Bourdeau Dispositif de variation de la distribution d'un moteur thermique a soupapes commandees

Also Published As

Publication number Publication date
DE102005021114A1 (de) 2006-11-09

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