WO2003038245A1 - Vorrichtung zur steuerung von gaswechselventilen - Google Patents
Vorrichtung zur steuerung von gaswechselventilen Download PDFInfo
- Publication number
- WO2003038245A1 WO2003038245A1 PCT/DE2002/002630 DE0202630W WO03038245A1 WO 2003038245 A1 WO2003038245 A1 WO 2003038245A1 DE 0202630 W DE0202630 W DE 0202630W WO 03038245 A1 WO03038245 A1 WO 03038245A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- gas exchange
- outlet
- valve actuator
- valves
- Prior art date
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 to the one with its second working chamber High-pressure source alternately closing or releasing first electrical control valve and on the other hand connected to a second control valve alternately releasing or closing a relief line.
- the electrical control valves are designed as 2/2-way solenoid valves with spring return. With de-energized control valves, the first work area is still under 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 depending on the formation of the electrical control signal applied to the first electrical control valve and the opening speed on the pressure applied by the high pressure source.
- the first control valve is then switched off so that it shuts off the supply line to the second working area of the valve actuator. 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.
- two electrical control valves are required, which act accordingly on the assigned valve actuator with hydraulic pressure.
- the inventive device for controlling gas exchange valves with the features of claim 1 has the advantage that one by the direct hydraulic coupling of the second working spaces of two valve actuators
- Valve actuator pairs for the implementation of the hydraulic Energy in a linear movement of the gas exchange valves the number of control valves required for the control of two valve actuators is reduced from four to just two. Since this also halves the number of output stages required to control the control valves in the electronic control unit and thus also reduces the wiring effort, the overall manufacturing costs for the control device can be significantly reduced. In addition, the installation space required is reduced due to the elimination of components and cabling, the low number of valves reduces the probability of failure of the control valves, and both the hydraulic and electrical energy requirements are reduced.
- the two gas exchange valves actuated by the first and second valve actuators are in the same
- Gas exchange valve of the same combustion cylinder in part could already dismantle via the opened first gas exchange valve.
- At least the first valve actuator has a mechanical stroke limitation, which is designed such that it blocks the further stroke movement of the actuating piston in the valve opening direction after the outlet on the first valve actuator connected to the second working space of the second valve actuator is released.
- a stroke limitation in the first valve actuator is energetically advantageous if the maximum opening cross section of both gas exchange valves is still sufficient for the full load range; By blocking the control piston in the first valve actuator, the entire excess force can be used to displace the control piston in the second valve actuator and to open the second gas exchange valve.
- the stroke speed of both gas exchange valves is pressure-dependent and is influenced by the overlap of the strokes in connection 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 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. Description of the embodiment
- the gas exchange valves 12, 13 can be intake valves or exhaust valves which close a combustion chamber 11 formed in the combustion cylinder 10 in a gas-tight manner.
- Each gas exchange valve 12, 13 has, in a known manner, a valve seat 15 enclosing an opening cross section 14 in the combustion cylinder and a valve member 16 with a valve closing body 162 seated on an axially displaceably guided valve stem 161, 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 device for controlling the two gas exchange valves 12, 13 shown in the drawing in the block diagram has a first valve actuator 17 actuating the gas exchange valve 12 and a second valve actuator 18 actuating the gas exchange valve 13.
- Valve control devices also include one Pressure supply device 19, which comprises a preferably controllable high-pressure pump 20, which conveys fluid, for example hydraulic oil, from a fluid reservoir 21, a check valve 22 and a pressure accumulator 23.
- a permanent, controllable high pressure is present at the outlet 191 of the pressure supply device 19 tapped between the nonreturn valve 22 and the pressure accumulator 23, which can also be preceded by a second nonreturn valve 24 with the passage direction pointing towards the outlet 191.
- the two hydraulic valve actuators 17, 18 are of identical design and each are designed as double-acting working cylinders with a cylinder housing 25 and an actuating piston 26 which is axially displaceable therein and divides the interior of the cylinder housing 25 into a first working chamber 27 and a second working chamber 28.
- the first two working spaces 27 of the two valve actuators 17, 18 are permanently connected to the outlet 191 of the pressure supply device 19.
- the second working chamber 28 of the first valve actuator 17 has an inlet 29 and two outlets 30, 31, the second outlet 31 being arranged at such a stroke distance from the first outlet 30 that 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 only released after a predetermined opening stroke of the actuating piston 26 to open the gas exchange valve 12 to the second working space 28.
- the second working space 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 with the outlet 191 of the
- Pressure supply device 19 connected.
- the first outlet 30 of the first valve actuator 17 is connected to the valve inlet of a second control valve 35, the valve outlet of which is connected to a return 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 is connected via a check valve 37 to the valve inlet of the second control valve 35.
- the direction of passage of the check valve 37 points 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 mode of action of. Valve control device is as follows:
- the two second working spaces 28 of the valve actuators 17, 18 are depressurized, and the high pressure of the pressure supply device present in the first working spaces 27 of the valve actuators 17, 18 19 ensures that the actuating pistons 26 are in their upper stroke end position and thereby hold 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 second working spaces 28 of the two valve actuators 17, 18 of the return 36 is shut off and the second working chamber 28 of the first valve actuator 17 is connected to the outlet 191 of the pressure supply device 19. Since the area of the actuating piston 26 delimiting the second working chamber 28 is larger than the effective area of the actuating piston 26 in the first working chamber 27, the high pressure present in the second working chamber 28 causes the actuating piston 26 to move downward and via the valve stem 161 the valve closing body 162 lifts off the valve seat 15 so that the gas exchange valve 12 opens.
- Gas exchange valves 12, 13 are controlled with a smaller or larger stroke. If a larger opening cross-section is now required, after a defined stroke of the actuating piston 26 in the first valve actuator 17, the outlet 31 is released by the actuating piston 28 so that high pressure now also builds up in the second working space 28 of the second valve actuator 18. The excess force in the second working chamber 28 which acts on the actuating piston 26 in the second valve actuator 18 now displaces the actuating piston 26, so that the valve member 13 also opens.
- the spacing of the two outlets 30, 31 on the first valve actuator 17 is designed in an energy-optimal manner 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, for example by the second one Outlet 31 is moved into a displaceable adjusting ring on the cylinder housing 25, which is in liquid-tight connection with the second working chamber 28. A lifting drive acts on the adjusting ring and is controlled by an electronic control device which also 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 double arrow 39 assigned to the second outlet 31.
- a plurality of second outlets 31 can be arranged one behind the other in the stroke direction of the adjusting piston 26 and can be closed one after the other by the adjusting ring.
- the lifting height of the respective gas exchange valve 12 or 13 when opening depends primarily on the actuation duration of the first control valve 34.
- a mechanical stroke limitation provided at least in the first valve actuator 17 then takes effect.
- the stroke limitation schematically indicated in the drawing only as a stop 38 is designed, for example, in such a way that the actuating piston 26 in the first valve actuator 17 is prevented from a further stroke movement in the valve opening direction shortly after the outlet 31 is released to the second working space 28 of the second valve actuator 18.
- Such a stroke limitation makes sense energetically, since then only hydraulic energy for adjusting the
- Actuating piston 26 is required in the second valve actuator 18.
- a prerequisite for such a stroke limitation is that the sum of the opening cross sections 14 in both gas exchange valves 12, 13 that can still be achieved by the stroke limitation is sufficient for the full-load range of the internal combustion engine.
- the stroke 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 spaces 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)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02760102A EP1440224B1 (de) | 2001-10-24 | 2002-07-18 | Vorrichtung zur steuerung von gaswechselventilen |
KR10-2004-7005972A KR20040048980A (ko) | 2001-10-24 | 2002-07-18 | 가스 교환 밸브의 제어 장치 |
DE50210991T DE50210991D1 (de) | 2001-10-24 | 2002-07-18 | Vorrichtung zur steuerung von gaswechselventilen |
JP2003540494A JP2005507045A (ja) | 2001-10-24 | 2002-07-18 | ガス交換弁を制御するための装置 |
US10/451,873 US7089896B2 (en) | 2001-10-24 | 2002-07-18 | Device for controlling gas exchange valves |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10152503.6 | 2001-10-24 | ||
DE10152503A DE10152503A1 (de) | 2001-10-24 | 2001-10-24 | Vorrichtung zur Steuerung von Gaswechselventilen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003038245A1 true WO2003038245A1 (de) | 2003-05-08 |
Family
ID=7703582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/002630 WO2003038245A1 (de) | 2001-10-24 | 2002-07-18 | Vorrichtung zur steuerung von gaswechselventilen |
Country Status (6)
Country | Link |
---|---|
US (1) | US7089896B2 (de) |
EP (1) | EP1440224B1 (de) |
JP (1) | JP2005507045A (de) |
KR (1) | KR20040048980A (de) |
DE (2) | DE10152503A1 (de) |
WO (1) | WO2003038245A1 (de) |
Families Citing this family (4)
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0721055A1 (de) * | 1995-01-06 | 1996-07-10 | Ford Motor Company Limited | Elektrisches Stellglied für drehbare Ventilsteuerung einer elektro-hydraulischen Gaswechselsteuervorrichtung |
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 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5572961A (en) * | 1995-04-05 | 1996-11-12 | Ford Motor Company | Balancing valve motion in an electrohydraulic camless valvetrain |
-
2001
- 2001-10-24 DE DE10152503A patent/DE10152503A1/de not_active Withdrawn
-
2002
- 2002-07-18 US US10/451,873 patent/US7089896B2/en not_active Expired - Fee Related
- 2002-07-18 WO PCT/DE2002/002630 patent/WO2003038245A1/de active IP Right Grant
- 2002-07-18 KR KR10-2004-7005972A patent/KR20040048980A/ko not_active Application Discontinuation
- 2002-07-18 DE DE50210991T patent/DE50210991D1/de not_active Expired - Fee Related
- 2002-07-18 JP JP2003540494A patent/JP2005507045A/ja not_active Abandoned
- 2002-07-18 EP EP02760102A patent/EP1440224B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0721055A1 (de) * | 1995-01-06 | 1996-07-10 | Ford Motor Company Limited | Elektrisches Stellglied für drehbare Ventilsteuerung einer elektro-hydraulischen Gaswechselsteuervorrichtung |
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 |
---|---|
EP1440224A1 (de) | 2004-07-28 |
KR20040048980A (ko) | 2004-06-10 |
DE10152503A1 (de) | 2003-05-08 |
JP2005507045A (ja) | 2005-03-10 |
US7089896B2 (en) | 2006-08-15 |
EP1440224B1 (de) | 2007-09-26 |
US20040079308A1 (en) | 2004-04-29 |
DE50210991D1 (de) | 2007-11-08 |
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