US20010011533A1 - Device for operating a gas exchange valve of an internal combustion engine - Google Patents
Device for operating a gas exchange valve of an internal combustion engine Download PDFInfo
- Publication number
- US20010011533A1 US20010011533A1 US09/775,757 US77575701A US2001011533A1 US 20010011533 A1 US20010011533 A1 US 20010011533A1 US 77575701 A US77575701 A US 77575701A US 2001011533 A1 US2001011533 A1 US 2001011533A1
- Authority
- US
- United States
- Prior art keywords
- play
- valve
- compensating element
- internal combustion
- combustion engine
- 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.)
- Granted
Links
Images
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
-
- 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
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
Definitions
- the invention relates to a device for operating a gas exchange valve of an internal combustion engine with an electromagnetic actuator which includes an opening magnet and a closing magnet and an armature movably disposed between the opening and closing magnets for operating a valve shaft against the force of a closing spring.
- Electromagnetic actuators for actuating gas exchange valves usually have two operating magnets, a valve opening magnet and a valve closing magnet, with opposite pole faces between which an armature is arranged.
- the armature acts directly or indirectly on a valve stem of the gas exchange valve.
- Actuators operating in accordance with the principle of mass-oscillation include a spring mechanism, wherein two springs act on the armature in opposite directions.
- two pre-stressed compression springs are used as the spring mechanism, of which one is a valve opening spring which biases the gas exchange valve in the valve opening direction and the other is a valve closing spring, which biases the gas exchange valve in the valve closing direction.
- DE 35 13 107 C2 discloses a gas exchange valve with an actuator in which the armature, together with an opening spring, acts on the valve stem, via an armature tappet, against the force of a closing spring, which acts on the valve stem of the gas exchange valve.
- DE 39 20 931 A1 discloses an electromagnetic actuator for gas exchange valves of displacement engines, in particular of internal combustion engines, which operates one or more gas exchange valves via a lever mechanism.
- the lever mechanism provides for a variable motion transmission between the actuator and the gas exchange valve.
- a play-compensating element compensates for the play, which is caused by the transmission system or which develops therein.
- the play-compensating element may be arranged in various positions in the transmission system either on the side of the gas exchange valve or on the side of the magnet, e.g. between the support structure of the lever system or between the closing magnet and the housing.
- the play compensation arrangement also includes a structure common to the gas exchange valve, or individual adjustment devices for changing the transmission ratios and to adapt the position of equilibrium of the oscillating system to the new spring forces by changing the position of one or more spring support points.
- DE 39 20 976 A1 discloses a similar adjusting device in which a hydraulic play-compensating element is supported in the armature and engages the valve stem of the gas exchange valve.
- the play-compensating element may be supplied with oil under pressure via the armature.
- a setting screw which is inserted in a top cover and acts on one support point of an opening spring which, with its other support point, engages the armature.
- a device for operating a gas exchange valve of an internal combustion engine having an electromagnetic actuator including an opening magnet and a closing magnet, between which there is arranged an armature which, together with an opening spring, engages a valve stem against the force of a closing spring, and a hydraulic play-compensating element arranged in the valve operating force transmission structure
- the play-compensating element is installed in the transmission structure together with a mechanical adjusting element providing for minimal valve play when the engine is shut down.
- the mechanical play compensating element compensates for all deviations or tolerances resulting from the manufacture so that the hydraulic play-compensating element need only compensate for the changes in length resulting from the operation of the internal combustion engine.
- any gap between the play-compensating element and the adjacent component is minimal when the engine is started up again after stand-still, with the result that no significant noise or excessive mechanical, electrical or thermal loading is generated. Operation of the internal combustion engine is possible however also with a defective mechanical play-compensating element.
- the adjusting element may simply comprise an adjusting disc, an eccentric shaft or a setting screw. It may be arranged ranged at various locations of the device, so that there is a high level of design freedom.
- FIG. 1 shows, schematically, a device according to the invention having a hydraulic play-compensating structure shown in a position as it is during operation of the internal combustion engine or shortly after the engine has come to a standstill,
- FIG. 2 shows a device according to FIG. 1 while the internal combustion engine is at a standstill and the oil has drained from the hydraulic play-compensating structure
- FIG. 3 shows a device according to FIG. 1 of the internal combustion engine immediately after start-up before the hydraulic play compensation structure has been readjusted
- FIG. 4 shows an enlarged detail area as indicated by the circle IV in FIG. 1, and
- FIG. 5 shows, in detail, another embodiment of the invention, that is, a variant from the arrangement of FIG. 1.
- an electromagnetic actuator 11 operates a gas exchange valve 2 in the cylinder head 33 (FIG. 5) of an internal combustion engine.
- the actuator 11 has a top closing magnet 15 and a bottom opening magnet 16 as well as an armature 12 , which is arranged axially movably between the magnets 15 and 16 .
- the armature 12 acts on a valve stem 4 of the gas exchange valve 2 via an armature tappet 13 and a play-compensating element 10 .
- Located at the free end of the valve stem 4 is a valve disc 3 , which interacts with a valve seat ring 6 positioned in the cylinder head 33 .
- a valve guide 5 guides the valve stem 4 in the cylinder head 33 .
- the cylinder head 33 has not been illustrated in FIGS. 1 - 4 .
- a pre-stressed spring system comprising a valve closing spring 7 and a valve opening spring 17 , retains the armature 12 in a position of equilibrium when the magnets 15 , 16 are de-energized.
- the position of equilibrium corresponds generally to a center position 19 with regard to the energy of the two springs 7 and 17 .
- the closing spring 7 is supported at one end, on the cylinder head 33 via a spring support structure 8 and, at the other end, on the valve stem 4 via a closing spring support plate 9 .
- the opening spring 17 is supported, at one end, on the actuator 11 and, at its other end, on the armature tappet 13 via an opening spring plate 18 .
- FIG. 1 shows the armature 12 during engine operation in the center position 19 between the two magnets 15 and 16 .
- the play-compensating element 10 is activated and ensures that the gas exchange valve 2 closes in a play-free manner.
- the closed position 21 that is, with the gas exchange valve 2 closed, the armature 12 butts against the closing magnet 15 .
- the closing spring 7 which is pre-stressed, engages the gas exchange valve 2 with a predetermined closing force.
- the play-compensating element 10 includes a cylinder 24 which butts against the valve stem 4 and in which a piston 25 is arranged in an axially movable manner. Together with the cylinder 24 , the piston 25 forms a pressure space 26 . Located in the latter is a spring 30 which biases the piston 25 against the armature tappet 13 , which is disposed in a recess 31 at the free end side of the piston 25 .
- the pressure space 26 is connected to an oil supply via a connection bore 14 in the armature tappet 13 and a connecting bore 27 in the piston 25 .
- a ball 28 which is biased into a bore closing position by a spring 29 forms a check valve opening in the direction of the pressure space 26 .
- the gap 22 makes correct functioning of the gas exchange valve 2 more difficult or disrupts operation completely.
- minimal valve play is therefore set during the installation by an adjusting element in the form of an adjusting disc 23 , 32 , 37 , 39 or in the form of a setting screw 35 .
- the distance between the parts adjacent to the play-compensating element 10 e. g. the distance between the valve stem 4 and the armature tappet 13 , is measured when the valve 2 is closed and the armature 12 engages the closing magnet 15 .
- the fully compressed length of the play-compensating element 10 is subtracted from this measurement. The remainder gives the desired thickness of the adjusting discs 23 , 32 , 37 , 39 plus a minimal valve play.
- the setting screw 35 is to be turned accordingly.
- the adjusting disc 23 , 32 , 37 , 39 or the setting screw 35 it is also possible to use other mechanical adjusting elements, e.g. an eccentric shaft (not illustrated specifically) or the like.
- the adjusting elements 23 , 32 , 37 , 39 may be arranged in any desired position in the force transmission path of the play-compensating element 10 .
- an adjusting disc 23 is provided beneath the opening magnet 16 . It is alternatively possible to arrange an adjusting disc 32 in the opening 31 of the piston 25 of the play-compensating element 10 (FIG. 4). In the exemplary embodiment according to FIG. 5, three alternatives are illustrated.
- the first alternative consists of an adjusting disc 37 , which is installed between a securing means in the form of a cover 36 and the cylinder head 33 . Further, the actuator 11 , which is arranged in a floating manner in the cylinder head 33 , may be supported on the cover 36 via the play-compensating element 10 .
- adjusting disc 37 it is possible to provide a setting screw 35 in the cover 36 , the play-compensating element 10 being supported on the setting screw 35 .
- an adjusting disc 39 may be positioned between the actuator 11 and the play-compensating element 10 may be supported thereon. Hydraulic fluid is fed to the play-compensating element 10 via a supply line 34 .
- the internal combustion engine can be started up again with a minimal gap 22 so that the loading of the components and development of noise are minimized.
Abstract
Description
- The invention relates to a device for operating a gas exchange valve of an internal combustion engine with an electromagnetic actuator which includes an opening magnet and a closing magnet and an armature movably disposed between the opening and closing magnets for operating a valve shaft against the force of a closing spring.
- Electromagnetic actuators for actuating gas exchange valves usually have two operating magnets, a valve opening magnet and a valve closing magnet, with opposite pole faces between which an armature is arranged. The armature acts directly or indirectly on a valve stem of the gas exchange valve. Actuators operating in accordance with the principle of mass-oscillation include a spring mechanism, wherein two springs act on the armature in opposite directions. Usually, two pre-stressed compression springs are used as the spring mechanism, of which one is a valve opening spring which biases the gas exchange valve in the valve opening direction and the other is a valve closing spring, which biases the gas exchange valve in the valve closing direction. When the magnets are not excited, the armature is retained by the valve springs in a position of equilibrium between the two magnets. This position corresponds to a center position, that is an equilibrium position of energy, between the two springs.
- DE 35 13 107 C2 discloses a gas exchange valve with an actuator in which the armature, together with an opening spring, acts on the valve stem, via an armature tappet, against the force of a closing spring, which acts on the valve stem of the gas exchange valve.
- DE 39 20 931 A1 discloses an electromagnetic actuator for gas exchange valves of displacement engines, in particular of internal combustion engines, which operates one or more gas exchange valves via a lever mechanism. The lever mechanism provides for a variable motion transmission between the actuator and the gas exchange valve. A play-compensating element compensates for the play, which is caused by the transmission system or which develops therein. The play-compensating element may be arranged in various positions in the transmission system either on the side of the gas exchange valve or on the side of the magnet, e.g. between the support structure of the lever system or between the closing magnet and the housing. The play compensation arrangement also includes a structure common to the gas exchange valve, or individual adjustment devices for changing the transmission ratios and to adapt the position of equilibrium of the oscillating system to the new spring forces by changing the position of one or more spring support points.
- DE 39 20 976 A1 discloses a similar adjusting device in which a hydraulic play-compensating element is supported in the armature and engages the valve stem of the gas exchange valve. The play-compensating element may be supplied with oil under pressure via the armature. Also provided is a setting screw which is inserted in a top cover and acts on one support point of an opening spring which, with its other support point, engages the armature. By virtue of the setting screw, the position of equilibrium of the armature is adjustable such that the armature rests in the center between the operating magnets when the magnets are de-energized.
- When the internal combustion engine is at a standstill, the hydraulic play-compensating element empties whereby the pre-determined position of equilibrium is changed in the direction toward the opening magnet. When the internal combustion engine is then started up again, the closing magnet has to generate a relatively high force. This causes a high mechanical, electrical and thermal load. Furthermore, in the closed position of the armature, there is a relatively large gap between the play-compensating element and the valve stem, which results in an annoying noise. In many cases, oscillation excitation of the system is not possible.
- It is the object of the invention, to improve the start-up capabilities of an internal combustion engine controlled via electromagnetic actuators.
- In a device for operating a gas exchange valve of an internal combustion engine having an electromagnetic actuator including an opening magnet and a closing magnet, between which there is arranged an armature which, together with an opening spring, engages a valve stem against the force of a closing spring, and a hydraulic play-compensating element arranged in the valve operating force transmission structure, the play-compensating element is installed in the transmission structure together with a mechanical adjusting element providing for minimal valve play when the engine is shut down.
- The mechanical play compensating element compensates for all deviations or tolerances resulting from the manufacture so that the hydraulic play-compensating element need only compensate for the changes in length resulting from the operation of the internal combustion engine. As a result, any gap between the play-compensating element and the adjacent component is minimal when the engine is started up again after stand-still, with the result that no significant noise or excessive mechanical, electrical or thermal loading is generated. Operation of the internal combustion engine is possible however also with a defective mechanical play-compensating element.
- The adjusting element may simply comprise an adjusting disc, an eccentric shaft or a setting screw. It may be arranged ranged at various locations of the device, so that there is a high level of design freedom.
- Further embodiments and advantages of the invention will become apparent from the following description of the invention on the basis of the accompanying drawings.
- FIG. 1 shows, schematically, a device according to the invention having a hydraulic play-compensating structure shown in a position as it is during operation of the internal combustion engine or shortly after the engine has come to a standstill,
- FIG. 2 shows a device according to FIG. 1 while the internal combustion engine is at a standstill and the oil has drained from the hydraulic play-compensating structure,
- FIG. 3 shows a device according to FIG. 1 of the internal combustion engine immediately after start-up before the hydraulic play compensation structure has been readjusted,
- FIG. 4 shows an enlarged detail area as indicated by the circle IV in FIG. 1, and
- FIG. 5 shows, in detail, another embodiment of the invention, that is, a variant from the arrangement of FIG. 1.
- In the arrangement1 of the invention as shown in FIG. 1, an
electromagnetic actuator 11 operates agas exchange valve 2 in the cylinder head 33 (FIG. 5) of an internal combustion engine. Theactuator 11 has atop closing magnet 15 and a bottom openingmagnet 16 as well as anarmature 12, which is arranged axially movably between themagnets armature 12 acts on avalve stem 4 of thegas exchange valve 2 via an armature tappet 13 and a play-compensatingelement 10. Located at the free end of thevalve stem 4 is a valve disc 3, which interacts with avalve seat ring 6 positioned in thecylinder head 33. Avalve guide 5 guides thevalve stem 4 in thecylinder head 33. For the sake of clarity, thecylinder head 33 has not been illustrated in FIGS. 1-4. - A pre-stressed spring system, comprising a valve closing spring7 and a
valve opening spring 17, retains thearmature 12 in a position of equilibrium when themagnets center position 19 with regard to the energy of the twosprings 7 and 17. The closing spring 7 is supported at one end, on thecylinder head 33 via aspring support structure 8 and, at the other end, on thevalve stem 4 via a closingspring support plate 9. Theopening spring 17 is supported, at one end, on theactuator 11 and, at its other end, on the armature tappet 13 via anopening spring plate 18. - FIG. 1 shows the
armature 12 during engine operation in thecenter position 19 between the twomagnets element 10 is activated and ensures that thegas exchange valve 2 closes in a play-free manner. Then in the closedposition 21, that is, with thegas exchange valve 2 closed, thearmature 12 butts against theclosing magnet 15. The closing spring 7, which is pre-stressed, engages thegas exchange valve 2 with a predetermined closing force. - The play-compensating
element 10 includes acylinder 24 which butts against thevalve stem 4 and in which apiston 25 is arranged in an axially movable manner. Together with thecylinder 24, thepiston 25 forms apressure space 26. Located in the latter is aspring 30 which biases thepiston 25 against the armature tappet 13, which is disposed in arecess 31 at the free end side of thepiston 25. Thepressure space 26 is connected to an oil supply via a connection bore 14 in the armature tappet 13 and a connectingbore 27 in thepiston 25. Aball 28, which is biased into a bore closing position by aspring 29 forms a check valve opening in the direction of thepressure space 26. It controls fluid flow from the connectingbore 27 out of thepressure space 26 valve. If the pressure prevailing in thepressure space 26 is lower than in the connectingbore 27, because, for example, the valve disc 3 butts against thevalve seat ring 6 before thearmature 12 reaches theclosing magnet 15, theball 28 is unseated against the force of thespring 29 and oil flows into thepressure space 26. In this way, thepiston 25 is adjusted axially until thearmature 12 engages theclosing magnet 15 when thegas exchange valve 2 is closed. - When the internal combustion engine is at a standstill, the valve closing spring7 and the
valve opening spring 17 subject the play-compensatingelement 10 to a loading, whereby the oil escapes from thepressure space 26 via throttle gaps provided (but not illustrated specifically). As a result, the play-compensatingelement 10 is compressed to the fullest extent. Accordingly, the position ofequilibrium 20 of thearmature 12 is changed in the direction toward the opening magnet 16 (FIG. 2). This means that, when the internal combustion engine is started up again, agap 22 is formed between the play-compensatingelement 10 and thevalve stem 4 when thearmature 12 is located in a closed position 21 (FIG. 3) and the armature engages theclosing magnet 15. Thegap 22 makes correct functioning of thegas exchange valve 2 more difficult or disrupts operation completely. According to the invention, minimal valve play is therefore set during the installation by an adjusting element in the form of anadjusting disc screw 35. For this purpose, the distance between the parts adjacent to the play-compensatingelement 10, e. g. the distance between thevalve stem 4 and thearmature tappet 13, is measured when thevalve 2 is closed and thearmature 12 engages theclosing magnet 15. The fully compressed length of the play-compensatingelement 10 is subtracted from this measurement. The remainder gives the desired thickness of the adjustingdiscs screw 35 is to be turned accordingly. Instead of theadjusting disc screw 35, it is also possible to use other mechanical adjusting elements, e.g. an eccentric shaft (not illustrated specifically) or the like. The adjustingelements element 10. - In the embodiments according to FIGS.1 to 3, an
adjusting disc 23 is provided beneath theopening magnet 16. It is alternatively possible to arrange anadjusting disc 32 in theopening 31 of thepiston 25 of the play-compensating element 10 (FIG. 4). In the exemplary embodiment according to FIG. 5, three alternatives are illustrated. The first alternative consists of anadjusting disc 37, which is installed between a securing means in the form of acover 36 and thecylinder head 33. Further, theactuator 11, which is arranged in a floating manner in thecylinder head 33, may be supported on thecover 36 via the play-compensatingelement 10. As an alternative to theadjusting disc 37, it is possible to provide a settingscrew 35 in thecover 36, the play-compensatingelement 10 being supported on the settingscrew 35. As a third alternative, anadjusting disc 39 may be positioned between the actuator 11 and the play-compensatingelement 10 may be supported thereon. Hydraulic fluid is fed to the play-compensatingelement 10 via asupply line 34. - With a proper selection of the adjusting
elements minimal gap 22 so that the loading of the components and development of noise are minimized.
Claims (6)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10005247.9 | 2000-02-05 | ||
DE10005247 | 2000-02-05 | ||
DE10005247A DE10005247C1 (en) | 2000-02-05 | 2000-02-05 | Arrangement for actuating gas replacement valve for internal combustion engine has play compensation element set to minimal valve play during installation by mechanical control element |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010011533A1 true US20010011533A1 (en) | 2001-08-09 |
US6352059B2 US6352059B2 (en) | 2002-03-05 |
Family
ID=7630044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/775,757 Expired - Lifetime US6352059B2 (en) | 2000-02-05 | 2001-02-05 | Device for operating a gas exchange valve of an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US6352059B2 (en) |
DE (1) | DE10005247C1 (en) |
FR (1) | FR2804717A1 (en) |
IT (1) | ITRM20010052A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060185633A1 (en) * | 2005-02-23 | 2006-08-24 | Chung Ha T | Electromechanical valve actuator |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10112999A1 (en) * | 2001-03-17 | 2002-09-19 | Bayerische Motoren Werke Ag | Procedure for switching off an internal combustion engine with electromagnetically operated gas exchange valves |
FR2829178B1 (en) * | 2001-09-06 | 2006-03-03 | Peugeot Citroen Automobiles Sa | DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE VALVE |
DE10231110A1 (en) * | 2002-07-10 | 2004-01-29 | Daimlerchrysler Ag | Device for operating a hydraulically operated valve clearance compensation element of an internal combustion engine |
DE10246182B3 (en) * | 2002-10-02 | 2004-03-04 | Meta Motoren- Und Energie-Technik Gmbh | Auxiliary control valve for intake channel of reciprocating piston engine has flow body defining annular flow channel and cooperating valve element displaced from central position by opening and closure magnets |
US7255073B2 (en) * | 2003-10-14 | 2007-08-14 | Visteon Global Technologies, Inc. | Electromechanical valve actuator beginning of stroke damper |
US20050076866A1 (en) * | 2003-10-14 | 2005-04-14 | Hopper Mark L. | Electromechanical valve actuator |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3513107A1 (en) * | 1985-04-12 | 1986-10-16 | Fleck, Andreas, 2000 Hamburg | ELECTROMAGNETIC OPERATING DEVICE |
US4777915A (en) * | 1986-12-22 | 1988-10-18 | General Motors Corporation | Variable lift electromagnetic valve actuator system |
DE3920931A1 (en) * | 1989-06-27 | 1991-01-03 | Fev Motorentech Gmbh & Co Kg | ELECTROMAGNETIC OPERATING DEVICE |
DE3920976A1 (en) * | 1989-06-27 | 1991-01-03 | Fev Motorentech Gmbh & Co Kg | ELECTROMAGNETIC OPERATING DEVICE |
DE29604946U1 (en) * | 1996-03-16 | 1997-07-17 | Fev Motorentech Gmbh & Co Kg | Electromagnetic actuator for a gas exchange valve with valve clearance compensation |
DE19647305C1 (en) * | 1996-11-15 | 1998-02-05 | Daimler Benz Ag | Electromagnetic operating device e.g. for IC engine gas-exchange valve |
JP3831104B2 (en) * | 1997-05-13 | 2006-10-11 | 株式会社日立製作所 | Intake / exhaust valve electromagnetic drive |
US6116570A (en) * | 1998-03-30 | 2000-09-12 | Siemens Automotive Corporation | Electromagnetic actuator with internal oil system and improved hydraulic lash adjuster |
JPH11336519A (en) * | 1998-04-07 | 1999-12-07 | Fev Motorentechnik Gmbh & Co Kg | Electromagnetic actuator for gas exchange valve with integrated valve gap correcting device |
JP3921311B2 (en) * | 1998-10-30 | 2007-05-30 | 株式会社日立製作所 | Electromagnetic drive device for engine valve |
-
2000
- 2000-02-05 DE DE10005247A patent/DE10005247C1/en not_active Expired - Fee Related
-
2001
- 2001-01-31 IT IT2001RM000052A patent/ITRM20010052A1/en unknown
- 2001-02-02 FR FR0101408A patent/FR2804717A1/en not_active Withdrawn
- 2001-02-05 US US09/775,757 patent/US6352059B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060185633A1 (en) * | 2005-02-23 | 2006-08-24 | Chung Ha T | Electromechanical valve actuator |
US7305942B2 (en) | 2005-02-23 | 2007-12-11 | Visteon Global Technologies, Inc. | Electromechanical valve actuator |
Also Published As
Publication number | Publication date |
---|---|
DE10005247C1 (en) | 2001-02-15 |
US6352059B2 (en) | 2002-03-05 |
FR2804717A1 (en) | 2001-08-10 |
ITRM20010052A1 (en) | 2002-07-31 |
ITRM20010052A0 (en) | 2001-01-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4637727B2 (en) | Internal combustion engine with variable drive valve driven by a single pumping piston and controlled by a single solenoid valve for each engine cylinder | |
US6085704A (en) | Electromagnetically operating actuator for intake and/or exhaust valves | |
KR100396383B1 (en) | Charge-cycle device with an electromagnetic actuator | |
CN112789393A (en) | Improved response time of lost motion valve mechanism | |
US6681732B2 (en) | Control device for switching intake and exhaust valves of internal combustion engines | |
US6352059B2 (en) | Device for operating a gas exchange valve of an internal combustion engine | |
US6089197A (en) | Electromagnetic actuator for an engine valve, including an integrated valve slack adjuster | |
CN114729582B (en) | Independent compression brake control module for compression release brake system of internal combustion engine | |
US7004123B2 (en) | Unit trigger actuator | |
JP2003510507A (en) | Valve for controlling liquid | |
US20080271708A1 (en) | Fuel Metering Unit For a High-Pressure Fuel Pump, and High-Pressure Fuel Pump | |
US6082315A (en) | Electromagnetic valve actuator | |
JP2009529615A (en) | Gas exchange valve actuator | |
US6260522B1 (en) | Device for actuating a gas exchange valve having an electromagnetic actuator | |
US5704314A (en) | Electromagnetic operating arrangement for intake and exhaust valves of internal combustion engines | |
US6782852B2 (en) | Hydraulic actuator for operating an engine cylinder valve | |
US7318398B2 (en) | Engine valve actuation system | |
US6394416B2 (en) | Device for operating a gas exchange valve | |
US6889638B2 (en) | Internal combustion engine comprising an electromagnetic actuator which is situated on a cylinder head | |
US20030196615A1 (en) | Electromagnetic valve control apparatus and control method thereof | |
JP4091925B2 (en) | 3-way solenoid valve | |
JP2002535530A (en) | Device for driving a gas exchange valve | |
JP4075029B2 (en) | Valve drive device | |
JP3733776B2 (en) | Solenoid valve | |
JP2002500309A (en) | Actuating device for charge cycle valve of internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DAIMLERCHRYSLER AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STOLK, THOMAS;VON GAISBERG, ALEXANDER;REEL/FRAME:011553/0726 Effective date: 20010129 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: DAIMLER AG, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:DAIMLERCHRYSLER AG;REEL/FRAME:022846/0912 Effective date: 20071019 Owner name: DAIMLER AG,GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:DAIMLERCHRYSLER AG;REEL/FRAME:022846/0912 Effective date: 20071019 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 12 |