EP1440224B1 - Vorrichtung zur steuerung von gaswechselventilen - Google Patents

Vorrichtung zur steuerung von gaswechselventilen Download PDF

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Publication number
EP1440224B1
EP1440224B1 EP02760102A EP02760102A EP1440224B1 EP 1440224 B1 EP1440224 B1 EP 1440224B1 EP 02760102 A EP02760102 A EP 02760102A EP 02760102 A EP02760102 A EP 02760102A EP 1440224 B1 EP1440224 B1 EP 1440224B1
Authority
EP
European Patent Office
Prior art keywords
valve
gas exchange
valve actuator
outlet
working space
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
EP02760102A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1440224A1 (de
Inventor
Udo Diehl
Bernd Rosenau
Simon Kieser
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 EP1440224A1 publication Critical patent/EP1440224A1/de
Application granted granted Critical
Publication of EP1440224B1 publication Critical patent/EP1440224B1/de
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
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/06—Timing or lift different for valves of same cylinder

Definitions

  • the invention relates to a device for controlling gas exchange valves in combustion cylinders of an internal combustion engine according to the preamble of claim 1.
  • each valve actuator whose actuating piston is integrally connected to the valve stem of the associated gas exchange valve, with its first working space constantly connected to a high pressure source and with its second working space on the one hand to a supply line to the high pressure source alternately closing or releasing first electric control valve and on the other hand a discharge line alternately releasing or closing second control valve connected.
  • the electrical control valves are designed as 2/2-way solenoid valves with spring return. With de-energized control valves, the first working space is still under high pressure, while the second working space is disconnected from the high pressure source and connected to the relief line. The gas exchange valve is closed. To open the gas exchange valve both control valves are energized.
  • the second working space of the valve actuator is on the one hand blocked by the second control valve with respect to the discharge line and on the other hand connected by the first control valve with the supply line to the high pressure source.
  • the gas exchange valve opens, wherein the size of the opening stroke depends on the formation of the voltage applied to the first electric control valve electrical control signal and the opening speed of the pressure supplied by the high pressure source.
  • the first control valve is then de-energized, so that it shuts off the supply line to the second working space of the valve actuator. In this way, all valve opening positions of the gas exchange valve can be adjusted by means of an electrical control unit for generating control signals.
  • two electrical control valves are required in each case, which act on the associated valve actuator according to hydraulic pressure.
  • the inventive device for controlling gas exchange valves with the features of claim 1 has the advantage that by the direct hydraulic coupling of the second working spaces of two valve actuators of a valve actuator pair for the implementation of the hydraulic Energy in a linear movement of the gas exchange valves, the number of required for the control of two valve actuators control valves is reduced from four to only two. Since it also halves the number of required for controlling the control valves output stages in the electronic control unit and thus also reduces the cabling effort, the manufacturing cost of the control device can be significantly reduced overall. In addition, the required installation space is reduced by the elimination of components and wiring, reduced by the low valve number, the probability of failure of the control valves and reduced both the hydraulic and the electrical energy requirements.
  • the two operated by the first and second valve actuator gas exchange valves are arranged in the same combustion cylinder of the internal combustion engine.
  • This has the advantage that the force surplus of the second valve actuator for opening the associated gas exchange valve does not have to be designed in the same amount as that of the first valve actuator, which must open the associated gas exchange valve against the maximum occurring back pressure in the combustion cylinder, but can be designed lower because the counterforce for opening the second gas exchange valve of the same combustion cylinder partially could already break down over the open first gas exchange valve.
  • At least the first valve actuator on a mechanical stroke limitation which is designed so that it blocks the further stroke movement of the actuating piston in the valve opening direction after releasing the connected to the second working space of the second valve actuator outlet on the first valve actuator by the actuating piston.
  • the lifting speed of both gas exchange valves is pressure-dependent and is influenced by the overlap of the strokes in conjunction with the release of the outlet in the second working space of the first valve actuator to the second working space of the second valve actuator. This results in a pressure and stroke-dependent speed curve of the gas exchange valves.
  • the invention is described in more detail below with reference to an embodiment shown in the drawing.
  • the drawing shows a circuit diagram of a device for controlling two gas exchange valves in a combustion cylinder of an internal combustion engine.
  • the gas exchange valves 12, 13 may be intake valves or exhaust valves which seal a combustion chamber 11 formed in the combustion cylinder 10 gas-tight.
  • Each gas exchange valve 12, 13 has in known manner an opening cross-section 14 in the combustion cylinder enclosing the valve seat 15 and a valve member 16 with a seated on an axially displaceable valve stem 161 valve closing body 162 which cooperates with the valve seat 15 for closing and releasing the opening cross-section 14.
  • the valve closing body 162 lifts off the valve seat 15 or lies on the valve seat 15.
  • the illustrated in the drawing in the block diagram device for controlling the two gas exchange valves 12, 13 has a gas exchange valve 12 actuated first valve actuator 17 and a gas exchange valve 13 actuated second valve actuator 18.
  • the valve control device further includes a Pressure supply device 19, which promotes a preferably controllable high-pressure pump 20, the fluid, for example hydraulic oil, from a fluid reservoir 21, a check valve 22 and a pressure accumulator 23 includes.
  • a pressure supply device 191 of the pressure supply device 19 which may be preceded by a second check valve 24 facing the output 191 forward direction, is a permanent, adjustable high pressure on.
  • the two hydraulic valve actuators 17, 18 are identically designed and each designed as a double-acting cylinder with a cylinder housing 25 and an axially displaceable guided therein actuator piston 26 which divides the interior of the cylinder housing 25 in a first working space 27 and a second working space 28.
  • the two first working chambers 27 of the two valve actuators 17, 18 are permanently connected to the outlet 191 of the pressure supply device. 19 connected.
  • the second working space 28 of the first valve actuator 17 has an inlet 29 and two outlets 30, 31, wherein the second outlet 31 is arranged at such a stroke distance from the first outlet 30, which in the closed position of the actuating piston 26 shown in FIG which he has brought about a closure of the gas exchange valve 12, the second outlet 31 is closed by the actuating piston 26 and is released to open the gas exchange valve 12 to the second working space 28 only after a predetermined opening stroke of the actuating piston 26.
  • the second working chamber 28 of the second valve actuator 18 has an inlet 32 and an outlet 33.
  • the inlet 29 on the first valve actuator 17 is via a first Control valve 3.4 connected to the output 191 of the pressure supply device 19.
  • the first outlet 30 of the first valve actuator 17 is connected to the valve inlet of a second control valve 35, whose valve outlet is connected to a return line 36 to the fluid reservoir 21.
  • the inlet 32 on the second valve actuator 18 is connected to the second outlet 31 on the first valve actuator 17 and the outlet 33 on the second valve actuator 18 via a check valve 37 to the valve inlet of the second control valve 35:
  • the passage direction of the check valve 37 faces from the outlet 33 to the second control valve 35.
  • the two control valves 34, 35 are designed as 2/2-way solenoid valves with spring return.
  • valve control device The operation of the valve control device is as follows:
  • the first control valve 34 is closed and the second control valve 35 is opened, the two second working chambers 28 of the valve actuator 17, 18 depressurized, and in the first working chambers 27 of the valve actuator 17, 18 pending high pressure of the pressure supply device 19 ensures that the actuating piston 26 are in their upper Hubend ein and thereby keep the gas exchange valves 12, 13 in their closed position.
  • the actuating piston 26 in the first valve actuator 17 closes the second outlet 31 connected to the inlet 32 on the second valve actuator 18.
  • the design of the distance between the two outlets 30, 31 on the first valve actuator 17 is energy-optimal as a function of the operating map of the internal combustion engine. It is also possible to make the stroke distance of the two outlets 30, 31 controllable by, for example, the second Outlet 31 is moved into a displaceable on the cylinder housing 25 collar, which is liquid-tight with the second working space 28 in conjunction. On the collar attacks a lifting drive, which is controlled by an electronic control unit, which controls the two control valves 34 and 35.
  • the axial displaceability of the second outlet 31 relative to the first outlet 30 is symbolized in the drawing by a second arrow 31 associated with the double arrow 39.
  • a plurality of second outlets 31 in the stroke direction of the actuating piston 26 can be arranged one behind the other, which can be closed by the adjusting ring successively.
  • the lift height of the respective gas exchange valve 12 or 13 during opening depends primarily on the activation duration of the first control valve 34. With prolonged control then engages provided at least in the first valve actuator 17 mechanical stroke limitation.
  • the in the drawing only as a stop 38 schematically indicated stroke limitation is for example designed so that the actuating piston 26 is prevented in the first valve actuator 17 shortly after releasing the outlet 31 to the second working chamber 28 of the second valve actuator 18 at a further stroke in the valve opening direction.
  • Such a stroke limitation makes energy sense, since then only hydraulic energy for adjusting the control piston 26 in the second valve actuator 18 is required.
  • the prerequisite for such a stroke limitation is that the sum of the opening cross sections 14 still achievable by the stroke limitation is sufficient in both gas exchange valves 12, 13 for the full load range of the internal combustion engine.
  • the lifting speed of the two gas exchange valves 12, 13 is primarily pressure-dependent and is influenced by the overlap of the strokes and the release of the connection between the second working chambers 28 of the two valve actuators 17, 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP02760102A 2001-10-24 2002-07-18 Vorrichtung zur steuerung von gaswechselventilen Expired - Lifetime EP1440224B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152503 2001-10-24
DE10152503A DE10152503A1 (de) 2001-10-24 2001-10-24 Vorrichtung zur Steuerung von Gaswechselventilen
PCT/DE2002/002630 WO2003038245A1 (de) 2001-10-24 2002-07-18 Vorrichtung zur steuerung von gaswechselventilen

Publications (2)

Publication Number Publication Date
EP1440224A1 EP1440224A1 (de) 2004-07-28
EP1440224B1 true EP1440224B1 (de) 2007-09-26

Family

ID=7703582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760102A Expired - Lifetime EP1440224B1 (de) 2001-10-24 2002-07-18 Vorrichtung zur steuerung von gaswechselventilen

Country Status (6)

Country Link
US (1) US7089896B2 (ko)
EP (1) EP1440224B1 (ko)
JP (1) JP2005507045A (ko)
KR (1) KR20040048980A (ko)
DE (2) DE10152503A1 (ko)
WO (1) WO2003038245A1 (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007021109A1 (de) * 2007-05-03 2008-11-13 Jan Mendzigall Verbrennungsmotor mit Querventilen
US10338672B2 (en) 2011-02-18 2019-07-02 Business Objects Software Ltd. System and method for manipulating objects in a graphical user interface
US9863293B2 (en) * 2012-08-01 2018-01-09 GM Global Technology Operations LLC Variable valve actuation system including an accumulator and a method for controlling the variable valve actuation system
EP3406866A1 (de) * 2017-05-22 2018-11-28 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Hydraulischer antrieb zum beschleunigen und abbremsen dynamisch zu bewegender bauteile

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5497736A (en) * 1995-01-06 1996-03-12 Ford Motor Company Electric actuator for rotary valve control of electrohydraulic valvetrain
US5572961A (en) * 1995-04-05 1996-11-12 Ford Motor Company Balancing valve motion in an electrohydraulic camless valvetrain
US5636602A (en) * 1996-04-23 1997-06-10 Caterpillar Inc. Push-pull valve assembly for an engine cylinder
DE19826047A1 (de) 1998-06-12 1999-12-16 Bosch Gmbh Robert Vorrichtung zur Steuerung eines Gaswechselventils für Brennkraftmaschinen

Also Published As

Publication number Publication date
JP2005507045A (ja) 2005-03-10
US20040079308A1 (en) 2004-04-29
EP1440224A1 (de) 2004-07-28
DE10152503A1 (de) 2003-05-08
WO2003038245A1 (de) 2003-05-08
US7089896B2 (en) 2006-08-15
KR20040048980A (ko) 2004-06-10
DE50210991D1 (de) 2007-11-08

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