EP1432891A1 - Dispositif pour commander des soupapes de changement des gaz - Google Patents

Dispositif pour commander des soupapes de changement des gaz

Info

Publication number
EP1432891A1
EP1432891A1 EP02747201A EP02747201A EP1432891A1 EP 1432891 A1 EP1432891 A1 EP 1432891A1 EP 02747201 A EP02747201 A EP 02747201A EP 02747201 A EP02747201 A EP 02747201A EP 1432891 A1 EP1432891 A1 EP 1432891A1
Authority
EP
European Patent Office
Prior art keywords
valve
gas exchange
valves
control
pair
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Withdrawn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
EP02747201A
Other languages
German (de)
English (en)
Inventor
Hermann Gaessler
Hubert Schweiggart
Bernd Rosenau
Ralph Engelberg
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 EP1432891A1 publication Critical patent/EP1432891A1/fr
Withdrawn legal-status Critical Current

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
    • 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 the actuating piston of which is connected in one piece to the valve tappet of the associated gas exchange valve, is constantly connected to a high-pressure source with its first working chamber and, on the one hand, to a supply line with its second working chamber the high pressure source alternately closing or releasing the first electrical control valve and secondly to .einem a Entlastungsleiturig "alternately releasing or closing the second control valve connected.
  • the electric control valves are designed as 2/2-egemagnetventile with spring return constructed When energized control valves of the first working chamber is still below. high pressure while the ' second work space is separated from the high pressure source and connected to the relief line. The gas exchange valve is closed.
  • Both control valves are energized to open the gas exchange valve. Due to the switching control valves, the second working space of the valve actuator is blocked on the one hand by the second control valve with respect to the relief line and on the other hand connected to the supply line to the high pressure source by the first control valve.
  • the gas exchange valve opens, the size of the opening stroke and the opening speed depending on the formation of the electrical control signal applied to the first electrical control valve. In order to keep the gas exchange valve in a certain open position, the first control valve is then switched off so that it leads the supply line to the second work space of the
  • Valve actuator shuts off. In this way, all valve opening positions of the gas exchange valve can be set by means of an electrical control device for generating control signals. To control a gas exchange valve, two electrical control valves are required, which act accordingly on the assigned valve actuator with hydraulic pressure.
  • the device according to the invention for controlling gas exchange valves with the features of claim 1 has the advantage that by linking the two second control valves of a pair of valve actuators for " closing the two together as intake or exhaust valves in a combustion igniter of the internal combustion engine Gas exchange valves of the. Computation effort for the 'generation' of the control signals for the valve control is reduced and a control signal output with associated power amplifier stage is saved in the control device. By maintaining the separately controlled first control valves, the opening stroke of the intake or exhaust valves can continue to be carried out in different sizes and with a time delay.
  • the two second control valves for a pair of valve actuators are designed as a structural valve unit with a common electrical control input. This saves a complete control valve and only requires one signal line from the control unit to the control input of the valve unit.
  • the valve unit is a 2/2 solenoid valve with two switching positions and two controlled valve connections, one of which is connected to one
  • Valve actuator is connected. In this case, the
  • the valve unit is a 3/2-way solenoid valve with two switching positions and three controlled valve connections, of which a first valve connection is connected to a relief line and the two further valve connections, which can simultaneously be connected to the first valve connection, each with a second working space Valve actuator pairs are connected.
  • the check valves in the connecting lines between the valve unit and the two valve actuators can be omitted if the valve connection forming the valve outlet, which is connected to the relief line, is dimensioned so large in the open state that a fluid backflow from one of the further valve connections the other of the other valve connections is avoided.
  • the valve unit is a 4/2-way solenoid valve with two switching positions and four controlled valve connections, of which a first valve connection and a second valve connection are each connected to a relief line and the third valve connection which can be connected to the first valve connection and the on the second valve connection can be connected to the fourth valve connection, each having a second working space of the pair of valve actuators.
  • the first and second valve connections are preferably lead separately to a fluid reservoir
  • the valve unit is a 4/3 ⁇ -way solenoid valve with three
  • Switch positions and four controlled valve connections two of which are connected to a relief line and two to a second working area of the pair of valve actuators.
  • the 4/3 way solenoid valve is designed so that in a Wegsteliung both second work spaces , the
  • Valve actuator pairs are connected to a relief line, in a further switching position both second working spaces of the valve actuator pair are blocked and in a further switching position one of the two second working spaces of the valve actuator pair is blocked and the other is connected to a relief line.
  • the valve unit is a 4/4-way solenoid valve having four switching positions and four controlled valve connections, two of which are each connected to a relief line and two with a second • working space of the valve plate pair.
  • the 4/4-way solenoid valve is designed so that in one switching position the second working spaces of the pair of valve actuators are connected to the relief lines, in a further switching position both second working spaces are blocked off and in the other two switching positions one of the two second working spaces of the pair of valve actuators is alternately connected with one Relief line connected and the other is cordoned off.
  • an expansion of the function can be achieved in that, in addition to closing the gas exchange valves together, the two gas exchange valves can now be closed with a time delay.
  • Fig. 1 a Circuit diagram of a device for control ⁇ - of two in a combustion cylinder one ⁇ ' . , Internal gas exchange arranged Entiien, Fig. 2 is a schematic representation of a gas exchange valve in one
  • FIG. 3 shows a circuit diagram of a modified to 5 device for controlling two gas exchange valves arranged in a combustion cylinder of an internal combustion engine according to three further exemplary embodiments
  • the device shown in the circuit diagram in FIG. 1 is used to control two gas exchange valves in a combustion cylinder of an internal combustion engine, which is usually equipped with two intake valves and two exhaust valves.
  • the two gas exchange valves 10 form the intake valves or the exhaust valves of the combustion cylinder.
  • Fig. 1 only the control for the two intake valves of the combustion cylinder is shown.
  • the same circuit diagram applies to the two exhaust valves of the combustion cylinder.
  • a valve actuator 11 is provided in the device, which has an adjusting piston 13 which is axially displaceable in a working cylinder 12.
  • the actuating piston 13 divides the working cylinder 12 into two hydraulic working spaces 121 and 122 defined by it and is firmly connected to the valve tappet 14 of the gas exchange valve 10.
  • FIG. 2 an enlarged view of a valve actuator 11 is shown schematically in connection with the associated gas exchange valve 10.
  • the valve tappet 14 carries at its end remote from the actuating piston 13 a plate-shaped valve sealing surface 15 which cooperates with a valve seat surface 17 formed on the housing 16 of the combustion cylinder of the internal combustion engine to control an opening cross section.
  • the working cylinder 12 has a total of three hydraulic connections, of which one hydraulic connection 121a opens into the first working space 121 and two hydraulic connections 122a and 122b open into the second working space 122 of the working cylinder 12.
  • the device also has a pressure supply device 22, which consists of a fluid reservoir 18, a high pressure pump 19, a check valve 20 and a reservoir 21. There is pulsation damping and energy storage.
  • the outlet 221 of pressure supply device 22, tapped between check valve 20 and accumulator 21, is connected via a line 23 to hydraulic connections -121a of two valve actuators 11, so that the first working spaces 121 of valve actuators 11 are constantly connected to the outlet 221 of pressure supply device 22, approximately constant hydraulic pressure, which can be regulated to different setpoints, are applied.
  • the second working spaces 122 of the working cylinders are connected by means of the hydraulic connections 122a and 122b of the working cylinder 12 on the one hand via a first electrical control valve 24 or 25 to the outlet 221 of the pressure supply device 22 and on the other hand via hydraulic connecting lines 35, 36 and second electrical control valves 25 and 27 each a
  • Relief line 28 and 29 connectable, which in turn open in the fluid reservoir 18.
  • All control valves 24 - 27 are designed as switching valves, specifically as 2/2-way solenoid valves with spring return ( . Proportional valves can also be used as control valves.
  • the electrical control inputs are via electrical signal lines 31, 32, 33, 34 on the electronic control unit 30 connected, the electrical signal lines 31 and 32 to the two first control valves 24, 26 of separate signal outputs 301, 303 with separate output stages of the
  • Control unit 30 depart, while the two electrical signal lines 32 and 34, which lead to the two second control valves 25, -27, from a common signal output 302 with an output or amplifier stage -.- ".
  • Each valve actuator 11 is integrated with the associated first control valve 24 and second control valve 25 or the associated first control valve 26 and second control valve 27 in an actuator housing 35 or 36, which is indicated by dashed lines in FIG. 1.
  • its output stage must be dimensioned accordingly.
  • the operation of the device for controlling the two inlet valves or gas exchange valves 10 is as follows:
  • Valve seat surface 17 rests on the housing 16 of the combustion cylinder of the internal combustion engine.
  • the control piston 13 assumes the position shown in FIG. 1 within the working cylinder 12 of the valve actuator 11, and the gas exchange valves 10 are closed.
  • a control signal for reversing the second control valves 25, 27 is generated by the electronic control unit 30 second control valve 27 arrives.
  • the second control valves 25, 27 are thereby simultaneously transferred into their blocking position, in which they shut off the second working chamber 122 from the relief line 28 or 29.
  • the electronic control unit 30 sends an amplified control signal to the electrical control input of the first control valve 24 via its signal output 301. This switches over and connects the second working space 122 to the output 221 of the
  • Control valve 24 falls back into its blocking position.
  • the pressure in the second working chamber 122 is maintained, so that the ' Gas exchange valve 10 maintains the opening stroke taken unchanged.
  • the electronic control unit 30 generates a control signal for the first control valve 26 simultaneously or with a time delay, which control signal reaches the electrical control input of the first control valve 26 via the signal output 303. This switches over to its working position in the same way, and the other gas exchange valve 10 is opened via the displacing adjusting piston 13.
  • the size of the opening stroke can be dimensioned the same or different from the opening stroke of the other gas exchange valve 10.
  • the control signal at the signal output 303 of the control unit 30 disappears after the desired opening stroke has been reached, as a result of which the first control valve 26 returns to its blocking position and shuts off the second working chamber 122 which is under pressure.
  • valve unit 40 in that the two second control valves 25, 27 for Control of the pair of valve actuators 11 in FIG. 1 are combined to form a valve unit 40 and the pair of valve actuators with the valve unit 40 and the two first control valves 24, 26 each associated with a valve actuator 11 are integrated in a common actuator housing 39.
  • the valve unit 40 as in FIGS. 3 and 4, only one common relief line 28 is present or, as in FIG. 5, two relief lines 28, 29 are again routed separately to the fluid reservoir 18.
  • the control devices according to FIGS. 3 to 5 correspond to those in FIG. 1, so that the same components are provided with the same reference numerals.
  • the valve unit 40 is a 2/2-way solenoid valve 41 with spring return. It has two switching positions with two controlled valve connections 411 and 412, of which the valve connection 411 is connected to the relief line 28.
  • the two connecting lines 35 and 36 leading from the second working spaces 122 of the valve actuators 11 of the pair of valve actuators "to the ' valve unit . 40 ' are connected to the other valve connection 412.
  • the check valve 42 or 43 in the connecting line 35 or 36 leading to the relief line 28 can be dispensed with in the associated valve actuator 11 while accepting a certain functional restriction.
  • valve unit 40 is a 3/2-way solenoid valve 44 with two switching positions and three controlled valve connections 441, 442 and 443, of which a first valve connection 441 is connected to the relief line 28 and the two further valve connections 442 and 443 which can simultaneously be connected to the first valve connection 441 are each connected via one of the connecting lines 35 and 36 to a second working chamber 122 of the two valve actuators 11.
  • valve outlet 'forming valve connection 441 which is connected to the relief line 28, is dimensioned in the open state of the 3/2-way solenoid valve 44 so large that a backflow of fluid from one valve connection .442 to the other valve connection 443 or vice versa is avoided.
  • it is wrong closing state 'of -3/2-way solenoid valve 44 is no connection between the valve ports 442 and 443.
  • the in the embodiment of FIG. 3 in the connecting lines 35, 36 required check valves can be omitted here.
  • the valve unit 40 is a 4/2-way solenoid valve 45 with two switching positions and four controlled valve connections 451-454, of which a first valve connection 451 on the relief line 28 and a second valve connection 452 on the relief line 29 is connected, as well as a third valve connection 453 which can be connected to the first valve connection 451 to the connecting line 35 and one to the second valve connection 452 .
  • openable ' fourth valve connection 454 is connected to the connecting line 36.
  • the two connecting lines 35, 36 in turn lead to the second working spaces 122 of the valve actuators 11 of the pair of valve actuators.
  • valve unit 40 unlike the designs of the valve units 40 in FIGS. 3 and 4, the gas exchange valves 10 always have the same closing speeds, regardless of whether only one gas exchange valve 10 is open or both gas exchange valves 10 are open.
  • Valve operation ' they must via the signal output 302 of the electronic control unit 30 applied control signals are designed accordingly.
  • valve unit 40 is implemented as a 4/3-way solenoid valve 46 or as a 4 / -way solenoid valve 47.
  • the 4/3-way solenoid valve is shown in Fig. 6 and the 4/4-way solenoid valve 47 in Fig. 7 in the circuit diagram.
  • the 4/3-way solenoid valve 46 has three switching positions and four controlled valve connections 461-464, and the 4/4-way solenoid valve 47 has four switching positions and four controlled valve connections 471-474.
  • Connection line 35 is blocked. So it is possible ,,, optionally to control one or the other gas exchange valve 10 with a time delay to the other gas exchange valve 10.

Landscapes

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

Abstract

L'invention concerne un dispositif pour commander des soupapes de changement des gaz dans un moteur à combustion interne. Ce dispositif comprend des actionneurs de soupape (11) hydrauliques, qui sont associés respectivement à une soupape de changement des gaz (10) et qui présentent un piston d'actionnement (13) agissant sur ladite soupape (10), et deux chambres de travail (121, 122) hydrauliques, délimitées par le piston d'actionnement (13). La première chambre de travail (121) sollicitant la soupape de changement des gaz (10) dans le sens de fermeture est remplie d'un fluide constamment sous pression. La deuxième chambre de travail (122) sollicitant la soupape de changement des gaz (10) dans le sens d'ouverture peut, par l'intermédiaire d'une première et d'une deuxième soupape de commande (24, 25 ou 26, 27) électriques, être remplie d'un fluide de pression et, en alternance, être totalement débarrassée de ce dernier. Afin de réduire les coûts, les deuxièmes soupapes de commande, regroupées de préférence au sein d'une unité soupape (40) et destinées à une paire d'actionneurs de soupape (11) qui actionnent deux soupapes de changement des gaz servant de soupapes d'admission ou d'échappement d'un cylindre de combustion, sont commandées par un signal de commande électrique commun.
EP02747201A 2001-08-17 2002-06-08 Dispositif pour commander des soupapes de changement des gaz Withdrawn EP1432891A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10140528 2001-08-17
DE10140528A DE10140528A1 (de) 2001-08-17 2001-08-17 Vorrichtung zur Steuerung von Gaswechselventilen
PCT/DE2002/002094 WO2003018968A1 (fr) 2001-08-17 2002-06-08 Dispositif pour commander des soupapes de changement des gaz

Publications (1)

Publication Number Publication Date
EP1432891A1 true EP1432891A1 (fr) 2004-06-30

Family

ID=7695850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747201A Withdrawn EP1432891A1 (fr) 2001-08-17 2002-06-08 Dispositif pour commander des soupapes de changement des gaz

Country Status (7)

Country Link
US (1) US20040074456A1 (fr)
EP (1) EP1432891A1 (fr)
JP (1) JP2005500463A (fr)
KR (1) KR100928405B1 (fr)
DE (1) DE10140528A1 (fr)
RU (1) RU2286468C2 (fr)
WO (1) WO2003018968A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20051810A1 (it) * 2005-09-28 2007-03-29 Dellorto Spa Dispositivo elettroidraulico di comando delle valvole di motori a combustione interna ad azionamento variabile
DE102007021109A1 (de) * 2007-05-03 2008-11-13 Jan Mendzigall Verbrennungsmotor mit Querventilen
JP4831839B2 (ja) * 2008-03-27 2011-12-07 三菱重工業株式会社 エンジンバルブアクチュエータ及び内燃機関
CN102135143A (zh) * 2011-04-06 2011-07-27 重庆长安汽车股份有限公司 一种纯气动amt离合器操纵系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009695A (en) * 1972-11-14 1977-03-01 Ule Louis A Programmed valve system for internal combustion engine
DE69212730T2 (de) * 1991-06-24 1996-12-05 Ford Werke Ag Hydraulisches Ventilsteuerung für Brennkraftmaschinen
US5237968A (en) * 1992-11-04 1993-08-24 Caterpillar Inc. Apparatus for adjustably controlling valve movement and fuel injection
US5497736A (en) * 1995-01-06 1996-03-12 Ford Motor Company Electric actuator for rotary valve control of electrohydraulic valvetrain
US6148778A (en) * 1995-05-17 2000-11-21 Sturman Industries, Inc. Air-fuel module adapted for an internal combustion engine
DK0767295T3 (da) * 1995-10-03 2000-06-05 Wortsilo Nsd Schweiz Ag Hydraulisk ventildrev
DE19826045A1 (de) * 1998-06-12 2000-01-13 Bosch Gmbh Robert Verfahren zur Steuerung eines Gaswechselventils für Brennkraftmaschinen
DE19826047A1 (de) * 1998-06-12 1999-12-16 Bosch Gmbh Robert Vorrichtung zur Steuerung eines Gaswechselventils für Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03018968A1 *

Also Published As

Publication number Publication date
KR20040030072A (ko) 2004-04-08
KR100928405B1 (ko) 2009-11-26
JP2005500463A (ja) 2005-01-06
DE10140528A1 (de) 2003-02-27
RU2286468C2 (ru) 2006-10-27
US20040074456A1 (en) 2004-04-22
WO2003018968A1 (fr) 2003-03-06

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