EP1331370A1 - Commande variable de soupape - Google Patents

Commande variable de soupape Download PDF

Info

Publication number
EP1331370A1
EP1331370A1 EP02100063A EP02100063A EP1331370A1 EP 1331370 A1 EP1331370 A1 EP 1331370A1 EP 02100063 A EP02100063 A EP 02100063A EP 02100063 A EP02100063 A EP 02100063A EP 1331370 A1 EP1331370 A1 EP 1331370A1
Authority
EP
European Patent Office
Prior art keywords
lever
valve lift
camshaft
transmission
variable valve
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.)
Withdrawn
Application number
EP02100063A
Other languages
German (de)
English (en)
Inventor
Michael Figura
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP02100063A priority Critical patent/EP1331370A1/fr
Publication of EP1331370A1 publication Critical patent/EP1331370A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F01L13/0015—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
    • 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
    • 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
    • F01L13/0021—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 rocker arm ratio
    • 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

Definitions

  • the invention relates to a variable valve lift control for an internal combustion engine, containing a camshaft, a first, in contact with the camshaft standing and pivoted lever and a second pivotally mounted lever for contacting a valve to be controlled.
  • the invention further relates to a method for variable control of valve lifts an internal combustion engine, with a first pivotable Lever a camshaft is scanned, and being a second pivotable Lever, which is coupled to the first lever, actuates a valve to be controlled.
  • the speed or the power of internal combustion engines is usually at constant stroke of the cylinder inlet valves by throttling the air supply regulated. This is due to the full opening of the valves even at low levels Speeds relatively high valve actuation forces. Throttling also leads at low speeds to low speeds of the intake Fresh air so that there is poor mixing of fuel and air, which in turn results in high hydrocarbon emissions.
  • valves with variable valve lift have been proposed which, instead of the conventional throttling of the air supply at low Engine speed a small valve lift and at high engine speed one Allow large valve lift.
  • DE 41 12 833 A1 describes a variable valve lift control known in which a camshaft on a first pivotable Lever acts, which with a parallel second pivotable Lever is in contact, the second lever actuating a valve of the engine.
  • the first lever is mounted in a rotationally variable axis, whereby a change in position of the axis of rotation the contact point between the shifts both levers and in this way for a different translation of the cam deflection in an actuating movement of the valve.
  • a disadvantage of this valve lift control is that the position-variable storage the axis of rotation of a lever is complex and only a relatively small Variation of the gear ratio allowed.
  • an object of the present invention was to provide a variable valve lift control, which in a constructive simple structure offers a wide range of gear ratios.
  • the variable valve lift control according to the invention for an internal combustion engine contains a camshaft and two levers with pivoting bearings. The first the lever is in contact with the camshaft while the second lever is intended to be brought into contact with a valve to be controlled become.
  • the valve lift control is characterized in that the first and the second lever indirectly via a transmission element that is movable in two degrees of freedom are coupled.
  • the first degree of freedom of this transmission link enables by definition a movement of the transmission member as well the lever, which is the scanning of the camshaft or the transmission of the camshaft deflection on the valve.
  • the second degree of freedom the movement of the transmission link enables variable positioning of the transmission link, whereby the transmission ratio can be set between the lever movements of your choice.
  • valve lift can be varied because the gear ratio with which the camshaft triggers Pivotal movement of the first lever into a pivotal movement of the second Lever and thus an actuation of the valve is converted by positioning of the transmission link between the two levers can be varied can.
  • the structure of the valve lift control can be relatively simple and robust, because only a separate component, namely the transmission link, must be changeable to adjust the gear ratio. Such a change in position of the transmission link can be done without any problems done over a long distance so that there is a very large range of gear ratios can be adjusted.
  • the second degree of freedom (to set the gear ratio) a shift the transmission link along at least one of the levers.
  • the displacement of the transmission member along the lever shifts the Point of contact between the transmission link and the lever, which is accordingly the lever geometry affects the translation of motion.
  • the second degree of freedom allows (to set the gear ratio) one turn of the Transmission member about a pivot axis, which is preferably parallel to Pivot axis is at least one of the levers.
  • a rotating bearing the transmission link can be structurally very reliable and compact be carried out.
  • the first and the second lever of the valve lift control are preferably parallel arranged to each other. In addition to a compact structure, that a deflection of one lever almost completely into a corresponding one Deflection of the other lever is converted.
  • the transmission link is advantageously in the space between the Swivel axes of the two levers arranged.
  • the distance of the transmission member from one of the pivot axes at the same time means an approach to the other pivot axis, so that in terms of the variation of the gear ratio on the two levers set two effects in the same direction.
  • the distance from the pan axis the first lever means e.g. at the same angular deflection of the first lever an increasingly larger deflection of the transmission link, while at the same time approaching the pivot axis of the second lever an increasingly larger angular deflection with the same deflection of the transmission link means.
  • valve lift control according to the invention has the advantage that the pivot axes of the first and second levers stationary with respect to the internal combustion engine can be trained, although it is not excluded, at Also need to be changed in position.
  • the first lever has two arms formed, one of the arms with the camshaft and the other arm with the transmission link is in contact. Due to the two-armed training of the Lever can be spatially compact with a relatively compact structure better separate from the rest of the valve control.
  • the transmission member is preferably directly or indirectly with the accelerator pedal connected so that its movement along the second degree of freedom - to set the gear ratio between the levers - is controlled by the accelerator pedal.
  • the power output of the engine can thus be used without a Throttle control, resulting in better fuel economy and due better mixing of air and fuel for lower emissions leads to the combustion.
  • the invention further relates to a method for variable control of valve strokes an internal combustion engine, wherein a first pivotable lever a camshaft is scanned and a second pivotable Lever, which is coupled to the first lever, actuates a valve to be controlled.
  • the method is characterized in that a movable in two degrees of freedom transmission link in contact with both levers for variation of the valve stroke is moved along the second degree of freedom such that its point of contact with the first lever and / or with the second lever changed.
  • the movement of the levers becomes variable at different positions tapped or initiated along the lever, which is due the lever geometry directly to a corresponding translation of the movement leads.
  • the transmission link linearly shifted to change the gear ratio.
  • it can also change the gear ratio around an axis of rotation be pivoted. It is particularly advantageous to achieve a very high level to design the transmission element with little or no valve lift, that it can assume a position in which the actuation and thus the rotational movement the first lever through the camshaft only a sliding of the transmission member along the first lever.
  • Figure 1 shows a first embodiment of the valve lift control according to the invention with variable valve lift.
  • a valve lift control is in a known manner the rotation of a camshaft 1 or the deflection of it control cam located in an up and down movement of a valve 5 converted.
  • the valve 5 in the figures only the upper one, out of the cylinder head 6 protruding end of the valve stem and the valve spring 7 shown.
  • the camshaft 1 initially acts on the free end one in contact with the first one, which is pivotally mounted on one side Lever 2.
  • the pivoting movement of the first following the camshaft Lever 2 is raised vertically by it towards a first degree of freedom and transmitted from the movable transmission member or pressure piece 3.
  • the pressure piece 3 in turn gives the movement to a second lever 4 further, which extends parallel to the first lever 2, but the axis of rotation that of the first lever 2 is opposite.
  • the free end of the second Lever 4 rests on the upper end of valve 5 and can therefore apply pressure exert on the valve to open it against the force of the valve spring 7 to move.
  • the pressure piece 3 which can move freely in the vertical direction, can be operated by an accelerator pedal (not shown) controlled along a second degree of freedom horizontally Direction to be shifted.
  • the horizontal position of the pressure piece 3 changes in accordance with the lever geometry of one cam rotation generated stroke of valve 5: one revolution of camshaft 1 generated first on the first lever 2 a certain, always constant angular deflection.
  • the pressure piece 3 picks up the deflection of the first lever 2, wherein the deflection transmitted to the pressure piece 3 in its path length is larger, the farther away from the pivot axis of the first lever 2 the tap he follows.
  • the deflection of the pressure piece 3 is then in a corresponding large deflection movement of the point contacted by the pressure piece 3 of the second lever 4 converted.
  • a larger angular deflection leads meanwhile to a correspondingly larger valve lift of valve 5.
  • Figure 2 shows an alternative embodiment of a valve lift control according to the invention with variable valve lift.
  • the constant compared to Figure 1 Parts are provided with the same reference numbers here and in the other figures and do not need to be explained again.
  • the first lever 22 is designed with two arms and mounted in a pivot axis 26, his left arm in the figure the cam shaft 1 scans.
  • the second pivotable lever 24 is one-sided in one Axis 27 mounted on the engine block. With its free end it lies on the Valve 5 open.
  • the first lever 22 and the second lever 24 are via a pin-shaped transmission member 23 coupled.
  • the transmission member 23 is axially in a guide 25 movable, which is the transmission of the camshaft follow-up movement between the first lever 22 and the second lever 24.
  • the storage 25 of the transmission member 23 is pivotable an axis of rotation that is parallel to the axes of rotation 26 and 27 of the two Levers 22 and 24 lie (i.e. perpendicular to the plane of the drawing).
  • Storage 25 can in turn be coupled to an accelerator pedal, which the said Swiveling movement allowed.
  • a pivoting movement of the bearing 25 changes the point at which the transmission member 23 taps the cam follow-up movement of the first lever 22 transmits this movement to the second lever 24. Due to the Geometric relationships change with the location of the points mentioned also the transmission ratio between the deflections of the levers 22 and 24, the axes of rotation 26 and 27 being possible to reinforce this effect should have a different distance from the axis of rotation of the bearing 25. About the pivoting movement of the bearing element 25 with the transmission member 23, the valve lift can thus be set variably.
  • FIG 3 shows a variant of the valve control according to Figure 2, in which the Pivot axis 37 of the second lever 34 with respect to the transmission link 23 is on the same side as the pivot axis 26 of the first lever 22.
  • Such an arrangement has the structural advantage that the same carrier for the Swivel axes 26 and 27 can be used.
  • one affects Pivotal movement of the transmission member 23 on both levers 22, 34 in the same direction out.
  • the transmission link 23 tapped a relatively large stroke far outside on the first lever 22 and near the pivot axis 37 fed to the second lever 34, where it is on high sensitivity.
  • Figure 4 shows another embodiment of the invention, which as well those of Figures 2 and 3 a pivotally mounted in a bearing 45 pin-shaped transmission member 43.
  • the transmission link 43 is between two on the same side in a pivot axis 46 or 47 mounted, one-armed pivot levers 42 and 44 arranged.
  • This arrangement again has the advantage that there is a rotation of the bearing 45 of the transmission member 43 affects both levers 42, 44 in the same direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP02100063A 2002-01-28 2002-01-28 Commande variable de soupape Withdrawn EP1331370A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02100063A EP1331370A1 (fr) 2002-01-28 2002-01-28 Commande variable de soupape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02100063A EP1331370A1 (fr) 2002-01-28 2002-01-28 Commande variable de soupape

Publications (1)

Publication Number Publication Date
EP1331370A1 true EP1331370A1 (fr) 2003-07-30

Family

ID=8185613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02100063A Withdrawn EP1331370A1 (fr) 2002-01-28 2002-01-28 Commande variable de soupape

Country Status (1)

Country Link
EP (1) EP1331370A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120050A1 (fr) * 2005-05-12 2006-11-16 Luigi Conti Moteur a combustion interne dote d’un systeme de levee de soupape a variation continue
WO2010123336A1 (fr) * 2009-04-24 2010-10-28 Nsarellah Nasserlehaq Arbre a cames coulissantes et intercalaires entre rails a position variable et poussoirs pour la distribution variable continue chez les moteurs a combustion interne de quatre temps
CN102966397A (zh) * 2012-11-15 2013-03-13 上海交通大学 压差式接触点移动系统
CN103850744A (zh) * 2013-12-20 2014-06-11 华南理工大学 一种可变气门升程机构
CN104329136A (zh) * 2014-09-09 2015-02-04 西华大学 连续可变气门升程控制装置
CN105673120A (zh) * 2014-11-21 2016-06-15 瑞庆汽车发动机技术有限公司 一种连续可变气门行程机构
CN110407070A (zh) * 2018-12-28 2019-11-05 大连嘉宏至伟新技术开发有限公司 宝塔式变径齿轮无级变速器及采用该变速器的无动力电梯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4112833A1 (de) 1990-12-19 1992-06-25 Audi Ag Variable ventilsteuerung fuer ein gaswechselventil einer brennkraftmaschine
JPH108930A (ja) * 1996-06-26 1998-01-13 Aisin Seiki Co Ltd 可変動弁機構
WO2002006642A1 (fr) * 2000-07-18 2002-01-24 Thyssen Krupp Automotive Ag Commandes de levee de soupape

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4112833A1 (de) 1990-12-19 1992-06-25 Audi Ag Variable ventilsteuerung fuer ein gaswechselventil einer brennkraftmaschine
JPH108930A (ja) * 1996-06-26 1998-01-13 Aisin Seiki Co Ltd 可変動弁機構
WO2002006642A1 (fr) * 2000-07-18 2002-01-24 Thyssen Krupp Automotive Ag Commandes de levee de soupape

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 05 30 April 1998 (1998-04-30) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120050A1 (fr) * 2005-05-12 2006-11-16 Luigi Conti Moteur a combustion interne dote d’un systeme de levee de soupape a variation continue
US7665434B2 (en) 2005-05-12 2010-02-23 Luigi Conti Internal combustion engine with continuous variable valve lift system
WO2010123336A1 (fr) * 2009-04-24 2010-10-28 Nsarellah Nasserlehaq Arbre a cames coulissantes et intercalaires entre rails a position variable et poussoirs pour la distribution variable continue chez les moteurs a combustion interne de quatre temps
CN102966397A (zh) * 2012-11-15 2013-03-13 上海交通大学 压差式接触点移动系统
CN102966397B (zh) * 2012-11-15 2014-12-10 上海交通大学 调节发动机进气门升程的压差式接触点移动系统
CN103850744A (zh) * 2013-12-20 2014-06-11 华南理工大学 一种可变气门升程机构
CN104329136A (zh) * 2014-09-09 2015-02-04 西华大学 连续可变气门升程控制装置
CN105673120A (zh) * 2014-11-21 2016-06-15 瑞庆汽车发动机技术有限公司 一种连续可变气门行程机构
CN110407070A (zh) * 2018-12-28 2019-11-05 大连嘉宏至伟新技术开发有限公司 宝塔式变径齿轮无级变速器及采用该变速器的无动力电梯

Similar Documents

Publication Publication Date Title
DE19960742B4 (de) Variabler Ventiltrieb, vorzugsweise für Verbrennungsmotoren
EP0389609B1 (fr) Dispositif d'actionnement des soupapes de moteurs a combustion interne a lame de levee de soupape reglable
DE10006018B4 (de) Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine
DE10140635B4 (de) Vorrichtung zur variablen Ventilhubverstellung von Gaswechselventilen einer Verbrennungskraftmaschine
DE10228022B4 (de) Ventilhubvorrichtung zur Hubverstellung der Gaswechselventile einer Verbrennungskraftmaschine
EP1811151A2 (fr) Moteur à combustion à piston élévateur
DE19859564A1 (de) Variable Ventilverstellvorrichtung
DE3217203A1 (de) Variable ventilsteuerung
EP1748160B1 (fr) Commande de soupape variable pour moteur à combustion interne
EP1331370A1 (fr) Commande variable de soupape
EP1050669B1 (fr) Dispositif de commande de soupape à levée variable pour moteur à combustion interne
DE4013604A1 (de) Dynamische ventilvorrichtung einer brennkraftmaschine
DE10325749A1 (de) Ventilmechanismus einer Brennkraftmaschine
DE19904840A1 (de) Ventiltrieb für Verbrennungsmotoren
DE10235403A1 (de) Schwenkhebel für einen hubvariablen Ventiltrieb
DE19825964A1 (de) Ventiltrieb einer Brennkraftmaschine
EP1022443B1 (fr) Dispositif de commande variable pour soupape de moteur a combustion interne
DE19641068B4 (de) Hubvariabler Ventiltrieb
DE4300684C2 (de) Ventiltrieb zur variablen Steuerung von Brennkraftmaschinen
DE102004038473B4 (de) Ventiltrieb für Ladungswechselventile von Verbrennungsmotoren
EP1608852B1 (fr) Dispositif d'actionnement variable des soupapes d'echange des gaz de moteurs a combustion interne et procede permettant de faire fonctionner un dispositif de ce type
DE102006003002B3 (de) Ventiltrieb für Ladungswechselventile von Verbrennungsmotoren
EP1350928B1 (fr) Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne
DE10006016B4 (de) Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine
EP1288451B1 (fr) Culasse pour moteur à combustion interne avec commande de soupapes à levée variable

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20031106