EP1029158B1 - Dispositif de commande d'une valve d'echange gazeux destine a des moteurs a combustion interne - Google Patents

Dispositif de commande d'une valve d'echange gazeux destine a des moteurs a combustion interne Download PDF

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Publication number
EP1029158B1
EP1029158B1 EP99916743A EP99916743A EP1029158B1 EP 1029158 B1 EP1029158 B1 EP 1029158B1 EP 99916743 A EP99916743 A EP 99916743A EP 99916743 A EP99916743 A EP 99916743A EP 1029158 B1 EP1029158 B1 EP 1029158B1
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EP
European Patent Office
Prior art keywords
valve
pressure
gas exchange
valve member
electrical control
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.)
Expired - Lifetime
Application number
EP99916743A
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German (de)
English (en)
Other versions
EP1029158A1 (fr
Inventor
Udo Diehl
Karsten Mischker
Rainer Walter
Stefan Franzl
Volker Beuche
Stefan Reimer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1029158A1 publication Critical patent/EP1029158A1/fr
Application granted granted Critical
Publication of EP1029158B1 publication Critical patent/EP1029158B1/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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic

Definitions

  • the invention relates to a control device a gas exchange valve for internal combustion engines.
  • a control device a gas exchange valve for internal combustion engines.
  • Control device is a piston-shaped valve member axially displaceable in a housing, the Valve member at its end near the combustion chamber a plate-shaped Has valve sealing surface with which it with a valve seat fixed to the housing for controlling an inlet or Exhaust cross section at the combustion chamber of the to be supplied Internal combustion engine interacts.
  • the valve member On his distant combustion chamber Shaft end, the valve member has a hydraulic piston on, two hydraulic work rooms in the axial direction separates from one another, a lower one, near the combustion chamber Workspace the valve member of the gas exchange valve in Closing direction and an upper work area that is far from the combustion chamber acts on the valve member in the opening direction.
  • the upper work space is over one included an electrical control valve High pressure supply line and another one Electrical control valve contained discharge line alternately can be filled with high pressure and relieved.
  • the Gas exchange valve is now controlled by filling of the upper work area, whereby when open Control valve in the high pressure supply line Pressure medium of high pressure in the upper work area flows, the force application surface on the piston of the Valve member of the gas exchange valve is larger than that Force application area in the lower work area, so that the Piston and with it the valve member in the opening direction below and so the opening cross section on Open valve member seat.
  • the discharge line of the upper workspace is meanwhile through the second Control valve closed. It is now targeted by Actuation of the control valves in the High pressure supply line and the relief line on upper working space of the gas exchange valve member possible, to realize different opening positions and that Gas exchange valve member by opening the control valve in the discharge line back onto its valve seat move back.
  • the known control device for Gas exchange valves have the disadvantage that the Valve element in the event of a failure of the pressure supply system in its open valve member position can remain so that there is a risk that the gas exchange valve member with the piston of the internal combustion engine in its upper Dead center collides. This can block the entire valve train and the heaviest mechanical Cause damage to the internal combustion engine itself and also affected by the possible blocking of the Drive axles on the driven motor vehicle also Vehicle occupant safety.
  • WO 96 121 09 A discloses a device for Control of gas exchange valves on the actuating piston of the gas exchange valves hydraulically with pressure on both sides are acted upon, the bottom of the Actuating piston continuously with a pressure accumulator and the Pressure side of a pump is connected and the top of the Actuating piston using either a solenoid valve the pressure side of the pump or a relief line connected is.
  • the inventive device for controlling a Gas exchange valve for internal combustion engines with the features of claim 1 has the advantage that a hydraulically actuated valve actuator concept available is provided, even if the Pressure supply device or the electrical Control of the control valves a persistence of Avoid gas exchange valve member in the open position and returning the valve member to its closed position guaranteed.
  • a first measure is implemented in that the electrical control valves in the high pressure supply line and in the relief line of the upper, the opening movement of the gas exchange valve member effecting work space are switched in the de-energized state so that the upper Working area on the piston of the gas exchange valve member is depressurized is.
  • the gas exchange valve member ensures working space, that the valve member in the de-energized state of the control valves is held securely in contact with the valve seat.
  • the for the opening stroke movement of the gas exchange valve member The responsible hydraulic work area can only be energized the electric control valves are filled with high pressure, so that the gas exchange valve only if it works properly Switching valves can be opened.
  • a working pressure accumulator is on the Valve control device provided, which preferably as Spring pressure accumulator is designed and in particular for Maintaining a predetermined stand pressure in the Control device is used.
  • This should Working pressure accumulator preferably a possible one Leakage loss during the parking of the to be supplied Compensate internal combustion engine and a stand pressure maintained immediately with the start of operation of the Internal combustion engine a safe function of the Control device guaranteed. Furthermore done a smoothing of the working pressure accumulator System pressure fluctuations during operation.
  • a check valve in one High pressure supply line from one Pressure supply device provided in the direction Gas exchange valve member opens, and the Working pressure accumulator and a branch line in the lower Work area are connected downstream in the flow direction.
  • the electrical control valves are more advantageous Formed as solenoid valves by a electrical control unit depending on Operating parameters of the internal combustion engine to be supplied can be controlled.
  • Figure 1 shows a schematic representation of a Embodiment of the control device in which in addition to the working pressure accumulator also an emergency pressure accumulator the lower working space of the control piston is connected and thus all the proposed Safety devices are shown.
  • the device shown schematically in FIG Control of a gas exchange valve for internal combustion engines has a gas exchange valve 1 for controlling an inlet or Exhaust cross-section on a combustion chamber not one internal combustion engine shown in more detail.
  • the Gas exchange valve 1 has an axial in a housing 3 Slidable valve member 5 on its lower, Valve-shaped end on the combustion chamber side, a valve sealing surface 7, with which it is used to control a Opening cross section with a valve seat 8 am Housing of the internal combustion engine interacts.
  • the Valve member 5 has on its upper, facing away from the combustion chamber End of a cross-sectional expansion forming a piston 9 with which the valve member 5 two hydraulic Working spaces in the housing 3 axially separates from each other.
  • a Pressure supply device For supplying pressure to the control device with a Pressure medium high pressure is still one Pressure supply device provided in Embodiment by a regulated high pressure pump 19th is formed, which the pressure medium, preferably oil a reservation 21 into a high pressure supply line 23 promotes.
  • the high pressure pump 19 can be on the suction side or be regulated on the pressure side.
  • a pressure storage space as a high pressure medium source then use a variety of High pressure supply lines to the individual Control devices of the individual gas exchange valves dissipate.
  • the original part of the high pressure supply line 23 opens in the upper hydraulic work space 15, being between the branch into the branch line 25 and the junction in the upper work space 15 a first electrical Control valve 27 in the high pressure supply line 23 is used.
  • a working pressure accumulator 29 in the flow direction in front of the first control valve 27 in the High pressure feed line 23 used as Spring pressure accumulator is formed.
  • Relief line 33 which in the reservoir 21st opens and into which a second electrical control valve 35 is used, through which the relief line 33rd is lockable.
  • Relief line 33rd In order to empty the line here too 33 and the upper work area 15 is to be avoided continues to open towards reservoir 21
  • Check valve 36 inserted into the relief line 33.
  • the lower working chamber 11 is also connected to an emergency pressure accumulator 37.
  • This designed as a spring pressure accumulator 37 is dimensioned so that after reaching the detection threshold for the drop in the supply pressure and including the closing losses of the check valve 31 there is still enough pressure and volume for the closing process of the actuator in the pressure accumulator.
  • the function of the emergency pressure accumulator 37 can be integrated into the control device according to the invention in addition to the working pressure accumulator 29, but it is alternatively also possible to take over the emergency pressure accumulator function through the working pressure accumulator 29 or to provide only the emergency pressure accumulator 37 on the control system.
  • the working pressure accumulator 29 and the emergency pressure accumulator 37 work together at different pressure levels, the working pressure accumulator 29 working with a higher restoring torque at a higher pressure level.
  • the working pressure accumulator 29 also takes on the task of smoothing the working pressure so that undesired pressure fluctuations in the system can be compensated for.
  • the different pressure levels at the spring accumulators of the two pressure accumulators 29, 37 are set by different return springs, the spring of the emergency pressure accumulator 37 having the lower spring force.
  • an emergency closing spring 39 is also required in the lower work space 11 used.
  • This emergency closing spring 39 is a compression spring formed between a lower paragraph of the housing and the lower piston ring face 13 is clamped and the thus the valve member 5 of the gas exchange valve 1 in Closing direction applied.
  • This emergency spring is 39 just so powerfully dimensioned that it is among all Conditions overcome the frictional moments in the gas exchange valve and the piston 9 on the valve member 5 from each Actuator position can move out into the closed position.
  • the inventive device for controlling a Gas exchange valve of an internal combustion engine works in following way.
  • a pressure medium preferably High pressure oil into the high pressure supply line 23.
  • This high pressure passes through the check valve 31 and the continuously open branch line 25 in the lower hydraulic work chamber 11, which is on the lower Piston ring face 13 the valve member 5 in its after holding position directed above.
  • the closed position of the gas exchange valve 1 are the electrical control valves 27 and 35 are de-energized, the first control valve 27 being the High-pressure supply line 23 into the upper working space 15 closes.
  • the second control valve 35 is in a de-energized state Condition open, so that from the upper work area 15 laxative discharge line 33 in the Pressure fluid reserve 21 is open. That way the valve member 5 by the pressure in the lower working space 11 pressed to its valve seat 8. In the upper pressure chamber 15 only the ambient pressure. Now that The first control valve 27 opens the gas exchange valve 1 energized in the high pressure supply line 23 and thus opened while the second control valve 35 through a Energizing is locked. This now flows through it Pressure fluid in the upper work area 15. Since the upper Pressure area 17 of the piston 9 is larger than the lower one Printing area 13 and the pressure in both workrooms 15, 11 is approximately the same, now shifts the resulting one Pressure force after the valve member 5 of the gas exchange valve 1 down to its open position.
  • the opening cross section of the gas exchange valve is opened.
  • the control valve 27 closed and thus the supply of pressure medium in the upper work space 15 interrupted.
  • the targeted Driving the electric control valves 27 and 35 are preferably designed as a solenoid valve, in Dependency on operating parameters of the internal combustion engine all by means of an electrical control unit Set valve opening positions.

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

Claims (4)

  1. Dispositif de commande d'une valve d'échange gazeux destiné à des moteurs à combustion interne avec un élément de valve (5) mobile. axialement, présentant à son extrémité proche de la zone de combustion une surface de valve étanche (7) avec laquelle il agit solidairement par le biais d'un siège de valve (8) et qui présente à son extrémité éloignée de la zone de combustion un piston (9) qui sépare axialement deux compartiments fonctionnels hydrauliques l'un de l'autre, dont un compartiment fonctionnel inférieur (11) proche de la zone de combustion pousse l'élément de valve (5) dans la direction de fermeture et un compartiment fonctionnel supérieur (15) éloigné de la zone de combustion pousse l'élément de valve (5) dans la direction d'ouverture, le compartiment fonctionnel inférieur (11) étant relié constamment à une source de haute pression (19) alors que le compartiment fonctionnel supérieur (15) est alimenté et déchargé à haute pression respectivement par un conduit d'alimentation à haute pression (23) contenant une première valve de commande électrique (27), et par un conduit de décharge (33) contenant une deuxième valve de commande électrique (35), la première valve de commande électrique (27) fermant, à l'état non alimenté, le conduit d'alimentation à haute pression (23) du compartiment fonctionnel supérieur (15) alors que la deuxième valve de commande électrique (35) maintient inactif le conduit de décharge (33), à l'état non alimenté, la source de haute pression (19) poussant un moyen hydraulique sous pression dans le conduit d'alimentation à haute pression (23) à partir duquel un conduit secondaire (25) est dérivé dans le sens du flux vers compartiment fonctionnel inférieur (11), avant la première valve de commande (27), et dans lequel une valve de non-retour (31) s'ouvrant dans le sens du flux est disposée dans le sens du flux, avant la dérivation du conduit secondaire (25), et auquel est relié un accumulateur de pression (29) configuré de préférence comme un accumulateur à ressort et dans lequel il est prévu un ressort de secours (39) configuré comme un ressort de compression de la valve d'échange gazeux (1) qui pousse le tube de la valve d'échange gazeux (5) en direction de son mouvement de fermeture et/ou le maintien dans sa position de fermeture et qui est tendu dans le compartiment fonctionnel inférieur (11) entre un palier et le piston (9) sur l'élément de valve (5) de la valve d'échange gazeux (1).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    les valves de commande électriques (27, 35) sont configurées dans le conduit d'alimentation à haute pression (23) et dans le conduit de décharge (33) comme des électrovalves qui sont commandées par un dispositif de commande électrique en fonction des paramètres de fonctionnement du moteur à combustion interne à alimenter.
  3. Dispositif selon la revendication 1,
    caractérisé en ce que
    la source à haute pression est configurée comme une pompe, de préférence comme une pompe à haute pression (19) réglable.
  4. Dispositif selon la revendication 1,
    caractérisé en ce que
    le compartiment fonctionnel inférieur (11) est relié à un accumulateur de pression de secours (37) configuré de préférence comme un accumulateur à ressort.
EP99916743A 1998-06-12 1999-02-16 Dispositif de commande d'une valve d'echange gazeux destine a des moteurs a combustion interne Expired - Lifetime EP1029158B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19826047A DE19826047A1 (de) 1998-06-12 1998-06-12 Vorrichtung zur Steuerung eines Gaswechselventils für Brennkraftmaschinen
DE19826047 1998-06-12
PCT/DE1999/000427 WO1999066179A1 (fr) 1998-06-12 1999-02-16 Dispositif de commande d'une valve d'echange gazeux destine a des moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1029158A1 EP1029158A1 (fr) 2000-08-23
EP1029158B1 true EP1029158B1 (fr) 2003-11-12

Family

ID=7870584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99916743A Expired - Lifetime EP1029158B1 (fr) 1998-06-12 1999-02-16 Dispositif de commande d'une valve d'echange gazeux destine a des moteurs a combustion interne

Country Status (6)

Country Link
US (1) US6321703B1 (fr)
EP (1) EP1029158B1 (fr)
JP (1) JP2002518626A (fr)
KR (1) KR100589297B1 (fr)
DE (2) DE19826047A1 (fr)
WO (1) WO1999066179A1 (fr)

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DE10107698C1 (de) 2001-02-19 2002-08-22 Bosch Gmbh Robert Gaswechselventileinrichtung für eine Brennkraftmaschine
DE10136020A1 (de) 2001-07-24 2003-02-13 Bosch Gmbh Robert Vorrichtung zur Steuerung von Gaswechselventilen
DE10138881A1 (de) * 2001-08-08 2003-02-27 Bosch Gmbh Robert Verfahren zum Betreiben einer elektrohydraulischen Ventilsteuerung einer Brennkraftmaschine, Computerprogramm sowie Steuer- und Regelgerät zum Betreiben einer Brennkraftmaschine
DE10140528A1 (de) * 2001-08-17 2003-02-27 Bosch Gmbh Robert Vorrichtung zur Steuerung von Gaswechselventilen
DE10143330A1 (de) 2001-09-05 2003-03-20 Bosch Gmbh Robert Brennkraftmaschine mit einer elektrohydraulischen Ventilsteuervorrichtung
DE10143959A1 (de) * 2001-09-07 2003-03-27 Bosch Gmbh Robert Hydraulisch gesteuerter Aktuator zur Betätigung eines Ventils
DE10147299A1 (de) * 2001-09-26 2003-04-24 Bosch Gmbh Robert Vorrichtung zur Steuerung eines Öffnungsquerschnitts in einem Verbrennungszylinder einer Brennkraftmaschine
ATE301239T1 (de) * 2001-10-19 2005-08-15 Bosch Gmbh Robert Hydraulischer aktor für ein gaswechselventil
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US6918361B2 (en) 2002-01-15 2005-07-19 Robert Bosch Gmbh Device for controlling a cross-section of an opening in the combustion cylinder of an internal combustion engine
DE10203273A1 (de) 2002-01-29 2003-08-07 Bosch Gmbh Robert Zylinderkopf
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DE10210158A1 (de) 2002-03-07 2003-09-18 Bosch Gmbh Robert Zylinder-Kolbentrieb
DE10210334A1 (de) 2002-03-08 2003-09-18 Bosch Gmbh Robert Vorrichtung zur Steuerung eines Gaswechselventils
DE10221566A1 (de) 2002-05-15 2003-11-27 Bosch Gmbh Robert Filter zum Einsatz in einem strömenden, viskosen Medium
DE10226254A1 (de) 2002-06-13 2003-12-24 Bosch Gmbh Robert Hydraulisch gesteuerter Aktuator zur Betätigung eines auslaßseitigen Gaswechselventils einer Brennkraftmaschine
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JP2004197588A (ja) * 2002-12-17 2004-07-15 Mitsubishi Motors Corp 内燃機関の動弁装置
DE10310300A1 (de) * 2003-03-10 2004-09-23 Robert Bosch Gmbh Verfahren zum Betreiben eines hydraulischen Aktors, insbesondere eines Gaswechselventils einer Brennkraftmaschine
US6959673B2 (en) * 2003-04-02 2005-11-01 General Motors Corporation Engine valve actuator assembly with dual automatic regulation
EP1536107A1 (fr) 2003-11-28 2005-06-01 Thomas Friedhelm Buschkuehl Dispositif d'actionnement de soupape de moteur à combustion interne, et procédé de commande
US7007644B2 (en) * 2003-12-04 2006-03-07 Mack Trucks, Inc. System and method for preventing piston-valve collision on a non-freewheeling internal combustion engine
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Also Published As

Publication number Publication date
DE59907710D1 (de) 2003-12-18
KR100589297B1 (ko) 2006-06-14
WO1999066179A1 (fr) 1999-12-23
EP1029158A1 (fr) 2000-08-23
US6321703B1 (en) 2001-11-27
KR20010022808A (ko) 2001-03-26
JP2002518626A (ja) 2002-06-25
DE19826047A1 (de) 1999-12-16

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