EP1493902A1 - Dispositif pour désactiver une soupape - Google Patents

Dispositif pour désactiver une soupape Download PDF

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Publication number
EP1493902A1
EP1493902A1 EP03101939A EP03101939A EP1493902A1 EP 1493902 A1 EP1493902 A1 EP 1493902A1 EP 03101939 A EP03101939 A EP 03101939A EP 03101939 A EP03101939 A EP 03101939A EP 1493902 A1 EP1493902 A1 EP 1493902A1
Authority
EP
European Patent Office
Prior art keywords
plunger
valve
switching
cam
control piece
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Withdrawn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
EP03101939A
Other languages
German (de)
English (en)
Inventor
Marcus Hahn
Frank Aust
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 EP03101939A priority Critical patent/EP1493902A1/fr
Publication of EP1493902A1 publication Critical patent/EP1493902A1/fr
Withdrawn legal-status Critical Current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
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • 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
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to a device for valve shutdown for a Valve mechanism, in particular an internal combustion engine, comprising at least one multi-part switching plunger, which has a Lever arrangement with a cam associated with this switch plunger Camshaft cooperates, for transmitting the operation of the cam a valve associated with the switch plunger valve of the valve mechanism is formed, and for activating a freewheel of the respective cam of the camshaft is trained.
  • valve lift mechanism for an internal combustion engine, which is arranged on the cylinder head. It points this valve lift mechanism has a swing arm rotatably mounted on the rod an engine intake valve is disposed, which in turn slidably in the cylinder head a motor is arranged.
  • the inlet valve is by the pivoting movement of the Swivel arm reciprocable, thereby opening and closing a To control inlet passage in the cylinder, so the incoming To control air / fuel mixture.
  • a contact roller element at one end of the swivel arm mounted on one side of the pivot bearing while a Contact surface along the pivot arm on the opposite side of the Drehlagerung is provided.
  • One positioning mechanism with another Rolling element is so active that optionally a contact point between this Rolling element and the contact surface is positionable to a pivot point for the Swivel arm between a maximum lift position for the intake valve and a to provide minimum lift position for the intake valve.
  • the contact roller element stands in such a way with a rotatable cam element in operative connection, that the Valve cyclically to a desired position between a minimum valve lift and a maximum valve lift is performed.
  • the Positioning mechanism has an arm which rotatably supports the rolling element, and controls for selectively rotating the arm to contact between a maximum and a minimum opening position to position.
  • These controls can be an arm driving the toothed segment include a meshing with this sector gear screw thread and a selectively operable drive motor for rotating the worm thread to thereby rotating the arm to the rolling element on one of the desired Position valve lift position corresponding position.
  • the Swivel bearings have a fixed pivot bearing to the first Folgefinger is pivotable at all positions of the movable pivot bearing. It In this case, in the preferred embodiment, the first follower of the first accesses Vietnamesefingers on the base circle of the first cam arrangement, regardless of whether the second follower is in or out of engagement with the second cam assembly.
  • the system described here serves to control a valve arrangement especially for solving the following problem:
  • an alternative cam mechanism be the problem of another previously known embodiment, the by the successively from the engagement of the two valve rocker arm with Push rod, moved by a high-speed cam or by a Low-speed cam, caused avoids, as well as the problem of a another previously known embodiment, where all the valve rocker with Push rod are continuously in contact with the cams, which means that the cams all the time must muster energy to the valve rocker arm with To drive push rod.
  • the system for controlling a valve arrangement described here is such hydraulically urged that the end portions of a pair of first Vietnamese crampefingern (low-high follower fingers) have a cylindrical bore, the hydraulic locking compensating receives, which refers to the Support the upper end of the valve tappets of the valves.
  • the hydraulic lock compensating elements are doing through channels with a hydraulic supply connected.
  • pivot bearing with a piston and a pivot shaft having a pivoting movement of first follower finger and the second follower finger enable. It works Swivel bearing in a first position for low engine speeds, in which the first cam follower on the first follower fingers with the cams of the first Cam arrangement are engaged, which is a control of the valves through this Enable cams. At higher speeds, the pivot bearing moves into one second position, in which the second cam follower on the second follower finger with the Cam of the second cam assembly are engaged to control the To allow valves through this cam.
  • US 2002/0014217 A1 which is a CIP application of US 6,321 704 B1
  • a hydraulically operated device for valve shutdown known for use in conjunction with a valvetrain a Internal combustion engine is provided.
  • This will be a previously selected number of Motor cylinders each equipped with a shut-off device, which with the respective intake valves is connected.
  • the valve train is a sufficient backlash supplied so that the valve remains closed and the cylinder during the Operation of the engine is switched off.
  • the shutdown device has in their inner body on a locking device, which in normal operation of the Valve gear is in the locked state.
  • the valve in hold the closed position, and turn off a cylinder, the Locking device acted upon such that this by increasing the Pressure of the engine oil is moved to the unlocked position. If the Locking device is unlocked, the valve gear is a significant backlash supplied to thereby keep the valve closed and the cylinder off.
  • the device described here for valve shutdown for an internal combustion engine includes valve means for controlling the flow to and from the Combustion chamber, drive means for providing a cyclic movement to Opening and closing of the valve devices in temporal relation to the Events in the combustion chamber, and means for valve actuation by the cyclic movement are applied, such that a cyclic opening and Closing the valve devices is effected.
  • the device for Valve deactivation includes a portion of these means for valve drive and includes an outer body part and an inner body part that is in the outer body part arranged and relatively movable back and forth. The arrangement includes a further the inner body part in the direction of an axial with respect to the outer Body part extended position biasing spring.
  • a Locking arrangement is disposed completely in the inner body part when The outer and inner body parts in an unlocked position located, wherein the locking arrangement is a radially movable Locking element and spring means comprise, which the locking element to load a locked position.
  • the locking arrangement is available with a Source with pressure fluid in operative connection, such that the locking element is loaded in its unlocked position.
  • the locking arrangement comprises further, that the outer body part has a substantially annular inner groove defined, which comprises an annular locking surface, wherein at least one Connection for the liquid in an open flow connection with the annular inner groove and in fluid communication with the source of pressurized fluid.
  • the Locking element further defines a substantially planar abutment surface, the aligned substantially parallel to the annular locking surface and is arranged for an opposing engagement when the Locking element in the locked position, whereby the inner body part have any rotational orientation with respect to the outer body part can.
  • the described arrangement is therefore an improved device for Valve shutdown are created in which the inner body part is not in one particular rotational orientation relative to the outer body part needed to ensure proper locking and unlocking.
  • the locking element is a substantially plane stop surface defined, which is substantially parallel to the annular Aligned locking surface and for a facing each other Engaging is arranged when the locking element in the locked position is, whereby the inner body part with respect to any rotational orientation on the outer body part can have.
  • the outer Control piece of the switch plunger for connection to the oil supply line at least one oil supply hole. It is recommended that the inner Tappet of the switch plunger at least one with the at least one Oil supply hole of the outer control piece of the switch plunger comprising cooperating control device. It is expedient the Control device of the inner plunger of the switching plunger as a control edge educated. The control edge acts in such a way with the oil supply hole together, that if the control edge by twisting the outer Control piece closes the oil supply hole of the outer control piece, the oil stored in the plunger remains in the outer control piece. The resulting closed oil chamber thus allows the transmission of power. If that Valve is to be turned off, the outer part of the switch plunger is twisted and opens the oil chamber with the control edge. The then escaping oil can thus then transfer no more power.
  • the lever assembly through which the multi-part design Switching plunger with a cam associated with this switch plunger Camshaft cooperates is designed as a drag lever. Pressed in the The camshaft is essentially this rocker arm to lift the valve. It It is advisable that the cam follower has a fastener secured against rotation on the inner plunger of the switch plunger is attached.
  • the fastening means for twist-proof attachment the rocker arm on the inner plunger of the switch plunger designed as a sheet metal this sheet can, for example, in the manner of a tongue and groove connection with the upper portion of the inner plunger of the switch plunger cooperate to to form in this way the rotation for the rocker arm.
  • the inner plunger in spring-loaded state in the outer Control piece of the switching plunger is inserted used. This is for one required because to actuate the valve, the inner plunger of the switch plunger as Counter bearing of the movement of the cam lever caused by the camshaft On the other hand, the spring load dampens shut off valve whose bagging movement and prevents penetration of the inner plunger.
  • the inner plunger of the switch plunger has underside an end stop.
  • This end stop is on the one hand prevents the spring too strong on the other hand is this end stop a Possibility to set a minimum stroke of the valve given.
  • the outer control piece of the switch plunger for transmitting a Verwarterrorism in its lower region has an external toothing.
  • the Transmission of the rotational movement of the outer control piece of the switch plunger one with the external teeth at the bottom of the outer control piece interacting rack done.
  • the inventive device for valve shutdown is generally 10 designated.
  • the device for valve shutdown 10 which in the Fig. 1 of the drawing is shown schematically in an exploded view, is provided for a valve mechanism, in particular an internal combustion engine and comprises at least one multi-part designed, designated 11 switch plunger, the via a lever assembly 12 associated with a switch tappet 11, not illustrated cam of a camshaft, also not shown interacts.
  • the switch plunger 11 is also for transmitting the actuation of the Cam on a switch plunger 11 associated valve of the valve mechanism formed further, the switching plunger 11 for activating a freewheel of the formed cam of the respective cam.
  • the inventive device for valve shutdown 10 is for the realization a mechanical solution for the actuation of the switch plunger 11 with a provided simple structure that the multi-part switching plunger 11 for Forming a mechanical valve shutdown essentially of a with the lever assembly 12 operatively connected inner plunger 13 and a is connected to an oil supply line outer control piece 14, see in turn Fig. 1 of the drawing.
  • this training will be the first time simple means that a device for valve shutdown 10 under Dispensing with hydraulic actuators purely mechanical, wherein the inventive arrangement with respect to their function or their Effect nevertheless corresponds to the hydraulically operated versions. It is the inventive arrangement but also easy and inexpensive to produce, and has a high reliability and durability.
  • Inventive device for valve shutoff 10 has the outer Control piece 14 of the switch plunger 11 for connection to the not shown here Oil supply line at least one, in this case exactly one, Oil supply hole 15 on.
  • Oil supply line at least one, in this case exactly one, Oil supply hole 15 on.
  • the outer control piece 14 of the Switching plunger 11 in the region of this oil supply hole 15 on the outside circumferential, designated 29 on groove.
  • the inner plunger 13 of the switch plunger 11th has at least one, in this case exactly one, with the oil supply hole 15th the outer control piece 14 of the switch plunger 11 cooperating Control device 16.
  • This control device 16 of the inner plunger 13 of the Switching plunger 11 is designed as a control edge 17.
  • the control edge 17 acts in such a way with the oil supply hole 15 together, that when the control edge 17 by turning the outer Control piece 14, the oil supply hole 15 of the outer control member 14th closes, the oil stored in the plunger remains in the outer control member 14.
  • the Resulting sealed oil chamber thus allows the transmission of power.
  • the valve is to be turned off, the outer part of the switch plunger 11 twisted and opens with the control edge 17, the oil chamber. The then escaping oil can thus no longer transmit power and the inner plunger 13 sacks Actuation down, the valve is not or only minimally operated.
  • the lever assembly 12, via which the multi-part switching plunger 11 with a cam of this cam follower 11 associated cam cooperates, is in the embodiment shown in Fig. 1 as Drag lever 18 is formed, which is above the respective cam of the camshaft is pressed to raise the valve.
  • the drag lever 18 is via a Fastening means 19 against rotation on the inner plunger 13 of the switch plunger 11 fastened, wherein the fastening means 19 for the twist-proof attachment of the Drag lever 18 on the inner plunger 13 of the switch plunger 11 as a sheet 20th is trained.
  • This sheet 20 acts, see again Fig. 1, in the manner of a tongue and groove Connection with the upper portion of the inner plunger 13 of the Switching plunger 11 via a receiving groove 26 together to in this way the Anti-rotation for the drag lever 18 to form.
  • the inner plunger 13 in spring-loaded state in the outer control member 14 of the switch plunger eleventh used trained is provided to a designated 27 spring.
  • a Such training is required on the one hand, because the operation of the valve inner plunger 13 of the switch plunger 11 as an abutment of the camshaft caused movement of the finger lever 18 must oppose, on the other hand, the spring load dampens with the valve off Bagging movement and prevents penetration of the inner plunger 13th
  • the inner plunger 13 of the switch plunger 11 has an end stop 21 on the underside on, on the one hand prevents the spring 27 is compressed too much, on the other hand, this end stop 21 provides a possibility for adjustment Given a minimum stroke of the valve.
  • the outer control piece 14 of the switch plunger 11 finally points at the illustrated embodiment for transmitting a rotational movement in its lower portion on an outer toothing 22, continues to take place Transmission of the rotational movement of the outer control piece 14 of the switching plunger 11 via one with the external teeth 22 at the bottom of the outer Control piece 14 cooperating rack 23.
  • Fig. 1 illustrated embodiment is also shown on the upper side of the inner plunger 13 located, designated 25 lubricating groove, one with 24 designated retaining ring and designated 28, on the inside of the outer control piece 14 located groove for this circlip 24th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP03101939A 2003-06-30 2003-06-30 Dispositif pour désactiver une soupape Withdrawn EP1493902A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03101939A EP1493902A1 (fr) 2003-06-30 2003-06-30 Dispositif pour désactiver une soupape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03101939A EP1493902A1 (fr) 2003-06-30 2003-06-30 Dispositif pour désactiver une soupape

Publications (1)

Publication Number Publication Date
EP1493902A1 true EP1493902A1 (fr) 2005-01-05

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EP03101939A Withdrawn EP1493902A1 (fr) 2003-06-30 2003-06-30 Dispositif pour désactiver une soupape

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005020586A1 (de) * 2005-05-03 2006-11-09 Bayerische Motoren Werke Ag Ventiltrieb für eine Brennkraftmaschine
DE102006007121A1 (de) * 2006-02-16 2007-08-23 Daimlerchrysler Ag Gaswechselventilbetätigungsvorrichtung
WO2008009557A1 (fr) * 2006-07-19 2008-01-24 Mahle International Gmbh Entraînement à cames
WO2009018897A1 (fr) * 2007-08-08 2009-02-12 Daimler Ag Dispositif d'appui commutable pour une commande de soupapes d'un moteur à combustion interne
DE102009006894A1 (de) 2009-01-28 2010-07-29 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Schaltbetätigung eines hydraulischen Ventilspielausgleichselements
EP2213849A1 (fr) * 2009-01-30 2010-08-04 Eaton Corporation Retenue de culbuteur
CN104819022A (zh) * 2015-03-23 2015-08-05 上海尤顺汽车部件有限公司 一种发动机冷启动机构
ITUB20159522A1 (it) * 2015-12-28 2017-06-28 Giovambattista Vaccaro Gruppo regolatore dell?alzata delle valvole di un motore a combustione interna
WO2022104305A1 (fr) * 2020-11-10 2022-05-19 Cummins Inc. Ensemble poussoir pour la modification du profil de levée de soupape

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1198606B (de) * 1959-11-13 1965-08-12 Renault Ventilsteuerung fuer eine Brennkraftmaschine mit obenliegender Nockenwelle
US4509467A (en) * 1982-11-09 1985-04-09 Aisin Seiki Kabushiki Kaisha Hydraulic lifter system for variable cylinder engines
US5419290A (en) * 1990-02-16 1995-05-30 Group Lotus Limited Cam mechanisms
DE4441506A1 (de) * 1994-11-22 1996-05-23 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
EP0814240A1 (fr) * 1996-06-11 1997-12-29 Ricardo Consulting Engineers Limited Poussoir de soupape hydraulique
DE19956159A1 (de) * 1999-11-23 2001-05-31 Schaeffler Waelzlager Ohg Ventiltrieb einer Brennkraftmaschine
US20010013325A1 (en) * 2000-02-10 2001-08-16 Gianluigi Buglioni Valves for i.c. engines with variable lifts and timings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1198606B (de) * 1959-11-13 1965-08-12 Renault Ventilsteuerung fuer eine Brennkraftmaschine mit obenliegender Nockenwelle
US4509467A (en) * 1982-11-09 1985-04-09 Aisin Seiki Kabushiki Kaisha Hydraulic lifter system for variable cylinder engines
US5419290A (en) * 1990-02-16 1995-05-30 Group Lotus Limited Cam mechanisms
DE4441506A1 (de) * 1994-11-22 1996-05-23 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
EP0814240A1 (fr) * 1996-06-11 1997-12-29 Ricardo Consulting Engineers Limited Poussoir de soupape hydraulique
DE19956159A1 (de) * 1999-11-23 2001-05-31 Schaeffler Waelzlager Ohg Ventiltrieb einer Brennkraftmaschine
US20010013325A1 (en) * 2000-02-10 2001-08-16 Gianluigi Buglioni Valves for i.c. engines with variable lifts and timings

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005020586A1 (de) * 2005-05-03 2006-11-09 Bayerische Motoren Werke Ag Ventiltrieb für eine Brennkraftmaschine
DE102006007121A1 (de) * 2006-02-16 2007-08-23 Daimlerchrysler Ag Gaswechselventilbetätigungsvorrichtung
US8490587B2 (en) 2006-07-19 2013-07-23 Mahle International Gmbh Cam drive
WO2008009557A1 (fr) * 2006-07-19 2008-01-24 Mahle International Gmbh Entraînement à cames
WO2009018897A1 (fr) * 2007-08-08 2009-02-12 Daimler Ag Dispositif d'appui commutable pour une commande de soupapes d'un moteur à combustion interne
DE102009006894B4 (de) * 2009-01-28 2010-10-14 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Schaltbetätigung eines hydraulischen Ventilspielausgleichselements
US8166941B2 (en) 2009-01-28 2012-05-01 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Device for switching activation of a hydraulic valve play equalization element
DE102009006894A1 (de) 2009-01-28 2010-07-29 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Schaltbetätigung eines hydraulischen Ventilspielausgleichselements
EP2213849A1 (fr) * 2009-01-30 2010-08-04 Eaton Corporation Retenue de culbuteur
US8375909B2 (en) 2009-01-30 2013-02-19 Eaton Corporation Rocker arm retention
CN104819022A (zh) * 2015-03-23 2015-08-05 上海尤顺汽车部件有限公司 一种发动机冷启动机构
CN104819022B (zh) * 2015-03-23 2023-09-05 上海尤顺汽车技术有限公司 一种发动机冷启动机构
ITUB20159522A1 (it) * 2015-12-28 2017-06-28 Giovambattista Vaccaro Gruppo regolatore dell?alzata delle valvole di un motore a combustione interna
WO2017115251A1 (fr) * 2015-12-28 2017-07-06 Giovambattista Vaccaro Unité de réglage de l'élévation des soupapes d'un moteur à combustion interne.
WO2022104305A1 (fr) * 2020-11-10 2022-05-19 Cummins Inc. Ensemble poussoir pour la modification du profil de levée de soupape

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