EP0995015A1 - Device for operating a gas shuttle valve by means of an electromagnetic actuator - Google Patents
Device for operating a gas shuttle valve by means of an electromagnetic actuatorInfo
- Publication number
- EP0995015A1 EP0995015A1 EP98939598A EP98939598A EP0995015A1 EP 0995015 A1 EP0995015 A1 EP 0995015A1 EP 98939598 A EP98939598 A EP 98939598A EP 98939598 A EP98939598 A EP 98939598A EP 0995015 A1 EP0995015 A1 EP 0995015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- armature
- compensation element
- gas exchange
- play compensation
- 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
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 actuating a gas exchange valve with an electromagnetic actuator according to the preamble of claim 1.
- Electromagnetic actuators for actuating gas exchange valves generally have two switching magnets, an opening magnet and a closing magnet, between the pole faces of which an armature is arranged so as to be displaceable coaxially with a gas exchange valve axis of the gas exchange valve.
- the armature acts directly or via an anchor bolt on a valve stem of the gas exchange valve.
- a preloaded spring mechanism usually two preloaded compression springs, acts on the armature, namely an upper and a lower valve spring.
- the upper valve spring acts in the opening direction and the lower valve spring in the closing direction of the gas exchange valve.
- the closing magnet or the opening magnet is briefly overexcited or the armature is set in motion by an oscillation routine in order to pull it out of the equilibrium position.
- the armature lies against the pole face of the energized closing magnet and is held by it.
- the closing magnet biases the valve spring acting in the opening direction.
- the closing mechanism gnet switched off and the opening magnet switched on.
- the valve spring acting in the opening direction accelerates the armature beyond the equilibrium position, so that it is attracted by the opening magnet.
- the armature strikes the pole face of the opening magnet and is held by it.
- the opening magnet is switched off and the closing magnet is switched on.
- the valve spring acting in the closing direction accelerates the armature beyond the equilibrium position to the closing magnet.
- the armature is attracted by the closing magnet, hits the pole face of the closing magnet and is held by it.
- a lash adjuster in which an actuator is floatingly supported in a cylinder head.
- the actuator opens and closes a gas exchange valve via an armature and two electromagnets arranged on both sides in the direction of movement of the armature.
- On the side facing away from the gas exchange valve there is a play compensation element between a cover plate and the actuator, which compensates for both positive and negative valve play.
- the play compensation element has a first hydraulic element with a play compensation piston in a cylinder.
- the lash adjuster piston lies between a first pressure chamber, which is controlled by the internal combustion engine and is remote from the gas exchange valve, and a second pressure chamber, which faces the gas exchange valve.
- There is a check valve in the piston is held in the closed position by a retaining spring.
- the check valve opens when there is overpressure in the first pressure chamber towards the second pressure chamber.
- the retaining spring is designed so that the check valve cannot open when there is no play and thus closes the connection between the two pressure chambers.
- the play compensation element is supported on the upper cover plate, which is firmly connected to the cylinder head. The play compensation element can only transmit pressure forces.
- the valve spring of the gas exchange valve no longer acts on the second pressure chamber.
- the pressure in the second pressure chamber thereby drops below that of the first pressure chamber, so that the check valve opens against the retaining spring.
- the pressure medium flows from the first into the second pressure chamber until the play is balanced. This compensation takes place over several working cycles of the valve.
- the play compensation element is only inserted into a bore in the actuator, so that both parts can be moved against each other and are therefore easy to assemble. Thereby, there occurs the effect that the actuator is relieved by a reaction force toward the gas exchange valve during the entire time in which the closing magnet is actuated to close the gas exchange valve. Furthermore, the play compensation element is relieved as soon as the armature hits the pole face of the opening magnet. If the game compensation element is relieved, it expands. If the actuator opens the gas exchange valve, an opposing reaction force is created, against which the play compensation element locks according to its function and can only yield slowly. The result of this is that the play compensation element expands more and more and the gas exchange valve no longer closes completely. There is a kind of inflation effect.
- the switching magnet In addition to the risk that the gas exchange valve will not close properly and thereby burn, the switching magnet has an increased energy requirement to attract the armature from an eccentric position. There is also a so-called stroke loss in that the actuator moves against the gas exchange valve movement during the closing process.
- the play compensation element of this second variant has, in addition to the first, a second hydraulic element with a cylinder, in which the first cylinder is guided with a ring-like extension.
- the ring-like extension also serves as a separating piston between an upper and a lower pressure chamber, which are connected via an annular throttle gap.
- the game compensation element is constructed like the previously described variant.
- the reaction force is transmitted to the lower pressure chamber via the first cylinder. Since the reaction force only lasts for a short time, there is no substantial pressure medium compensation between the upper and the lower pressure chamber.
- the Actuator is not moving. However, positive and negative play can be compensated for over several valve cycles.
- the assembly of the play compensation elements, which are subjected to tension and pressure, with which the actuator is virtually suspended from the cover plate, is particularly complex and complex, in particular because the gas exchange valves are skewed due to space constraints and are diverging towards one another in the direction of the actuator.
- a cover plate with seals and screw set must be provided for each gas exchange valve and actuator.
- valve springs move the actuator slowly upwards when the switching magnet is not energized, as a result of which the armature is displaced from its geometric center position between the pole faces of the switching magnet.
- the second hydraulic element locks back into the central position against rapid compensation in accordance with its function. The middle position is reached, if at all, only after several cycles. The result in turn is an increased energy requirement and the risk that the gas exchange valve cannot be held because it strikes the pole face of the closing magnet at too high a speed and bounces off it again or is not accelerated sufficiently close to the opening magnet by the upper valve spring.
- a device for actuating a gas exchange valve with an electromagnetic actuator in which a play compensation element is arranged between an armature and a Yentil shaft, which can only transmit pressure forces.
- the game compensation element is hermetic completed and has no pressure connection through which it is supplied with pressure medium.
- a device for actuating a gas exchange valve with an electromagnetic actuator in which a play compensation element is arranged between an armature tappet and a valve stem.
- the play compensation element is inserted into a cup tappet arranged between the armature tappet and the valve stem, which in turn is guided in a base plate of the actuator housing so as to be displaceable in the valve axis direction.
- An oil supply channel runs in the base plate, which is connected to the hydraulic lash adjuster via a circumferential groove on the tappet and a transverse bore.
- the object of the invention is to carry out a device for actuating gas exchange valves with a play compensation element in such a way that the inflation effect is largely avoided and a rapid return to the central position is ensured. Furthermore, the play compensation element should be easy to assemble and to be supplied with a pressure medium.
- a hydraulic lash adjuster is proposed, which is connected to a pressure connection in the longitudinal direction in the armature tappet via a channel.
- the gas exchange valves must always close securely.
- the play compensation elements on which the gas exchange valves are supported directly or indirectly, have the tendency to always shorten slowly. This is achieved with hydraulic lash adjusters with an appropriate throttle point. If the anchor is no longer sufficient close to the closing magnets, because the backlash compensation device has shortened too much, a quick compensation in the opposite direction must take place, which is achieved with an opening check valve.
- Such an iterative process with a fast and a slow compensation causes the gas exchange valve to constantly move in a range of an optimal play setting.
- the play compensation element is clamped between the armature plunger and the valve stem between an upper valve spring acting in the opening direction and a lower pressure spring acting in the closing direction. Both valve springs are preloaded to such an extent that when the solenoids are de-energized, the armature adjusts itself to an approximately middle position between the pole faces of the solenoid and, at the same time or shortly before the gas exchange valve is in the closed position, a residual closing force from the lower valve spring to the play compensation element, the armature tappet and the armature works.
- the closing magnet must apply the spring force of the upper valve spring acting in the opening direction minus the residual closing force of the lower valve spring acting in the closing direction.
- the same force that the closing magnet has to exert acts as a reaction force in the opposite direction on the actuator. This force relieves the play compensation element from the prior art and leads, among other things, to the inflation effect.
- the play compensation element between the armature tappet and the valve stem there is always a compressive stress at least in height the residual closing force, which largely prevents inflation.
- the actuator has a mass many times greater than the gas exchange valve with its valve stem or the armature with its armature tappet.
- the lash adjuster only has to adjust the small mass of the anchor or the gas exchange valve between the armature tappet and the actuator, so that a slight inflating effect can be compensated for by controlled leakage without the lash adjuster being over-inflated by an excessive amount of leak oil becomes soft.
- the actuator is fixed and only the small masses of the armature with its armature tappet or the gas exchange valve with its valve stem are adjusted by the play compensation element, thereby saving energy.
- the play compensation element can simply be placed on the valve stem after the gas exchange valve has been installed, or it can be preassembled with the actuator.
- play compensation elements with only one hydraulic element can be used, ie which only absorb pressure forces and no tensile forces. This ensures that after a new start the equilibrium position of the armature, determined by the spring system, is quickly and precisely adjusted to the geometric center position between the pole faces of the opening magnet and the closing magnet.
- the play compensation element adjusts to the exact length without a second hydraulic element blocking the process.
- the play compensation element is connected to the pressure connection only in the area shortly before and in the closed position. Only when the gas exchange valve is closed, i.e. with its valve plate resting on a valve seat ring, the length dimension results, how far the backlash compensation element must extend, so that on the one hand the gas exchange valve with its valve plate cleanly seals on the valve seat ring and on the other side the armature exactly on the pole face of the closing magnet Concern comes.
- Fig. 1 shows an electromagnetic actuator and a gas exchange valve with a play compensation element which is connected to a pressure connection
- Fig. 2 an actuator according to the embodiment of FIG. 1, in which the play compensation element is connected to the pressure connection via a channel in the anchor plunger and Fig. 3 shows an actuator according to the embodiment of Fig. 2, in which the armature tappet forms part of the play compensation element.
- the 1 shows an actuator 2 for actuating a gas exchange valve 1, which is fixedly mounted in a recess 35 in a component 3, for example in an actuator carrier or in a cylinder head.
- the actuator 2 has an opening magnet 4 and a closing magnet 5, between which an armature 6 is arranged to be axially displaceable.
- the armature 6 is fastened on an armature tappet 7 or made in one piece with it, with which it acts on a valve stem 9 of the gas exchange valve 1.
- the actuator 2 has a spring system 8 below the opening magnet 4 with a lower valve spring 30 acting in the closing direction and with an upper valve spring 31 acting in the opening direction.
- the lower valve spring 30 is supported in the direction of the gas exchange valve 1 on the component 3 and in the Gas exchange valve 1 facing away from a spring plate 32 attached to the valve stem 9.
- the upper valve spring 31 is supported in the direction of the gas exchange valve 1 on a spring plate 33 fastened on the armature tappet 7 and in the direction remote from the gas exchange valve 1 on the opening magnet 4.
- the valve springs 30, 31 are preloaded to such an extent that, when the solenoids 4, 5 are de-energized, the armature 6 adjusts to an approximately middle position between the solenoids 4, 5 and immediately before the closed position of the gas exchange valve 1, a residual closing force of the lower valve spring 30 and immediately there is a residual opening force of the upper valve spring 31 before the opening position.
- a hydraulic lash adjuster 10 is clamped between the armature tappet 7 and the valve stem 9 by the pretensioning of the valve springs 30, 31.
- the play compensation element 10 is supplied with pressure oil via a cup 15, which is arranged between the play compensation element 10 and the anchor plunger 7, and the play compensation element 10 with its side cheeks 34 partially surrounds and is guided to the outside in an oil pressure-fed cylinder head-fixed guide 14 via sliding friction.
- the guide 14 is formed by a separate component 52, which is inserted into the recess 35 of the component 3.
- Component 52 lies with its outer circumference on the inner contour of recess 35 and is supported by a collar 37 in the direction away from gas exchange valve 1 on opening magnet 4 and in the direction of gas exchange valve 1 on a step 29 in component 3 or in the cylinder head from.
- the component 52 has a pressure chamber 36 on its outer circumference, via which it is connected via a channel 38 to a pressure connection 13.
- a channel 39 leads from the pressure chamber 36 to the guide 14 and opens into an annular groove 40.
- an interior space 41 is formed between the cup 15 and the play compensation element 10 via a channel 42 in the cup 15 with the Ring groove 40 connected.
- the play compensation element 10 is guided radially via a guide 44.
- the armature 6 with its armature tappet 7, the play compensation element 10 and the gas exchange valve .1 can be installed rotationally symmetrically.
- the annular groove 40 ensures that the cup 15 is supplied with oil regardless of the orientation during assembly.
- the pressure oil is then, if necessary, supplied to the play compensation element 10 from above via a recess 56 on an inner cover side 43 of the cup 15.
- the supply of pressurized oil via cups 15 is a sophisticated technique and therefore has few problems. However, it is also possible to supply the pressure oil with or without a cup 15 directly to the side of an appropriately designed play compensation element.
- the play compensation element can also be guided directly in the component 3.
- FIG. 2 shows an embodiment of the invention, in which a play compensation element 11 is supplied with pressure oil via an elongate channel 18 in an anchor plunger 16 or is connected to the pressure connection 13.
- a guide 21 for the game compensation element 11 and in particular a cup 15 is not required. The friction on the play compensation element 11 is eliminated and the moving mass is reduced.
- the pressure oil is supplied from the pressure connection 13 via a channel 46 to a ring 47 below the opening magnet 4 via an annular groove 49 on the end facing the gas exchange valve 1. Within the ring 47, it is guided to a second annular groove 48 arranged on the inner circumference of the ring 47.
- the ring 47 is supported in the direction of the gas exchange valve 1 at a step 51 in the third part 3 and in the direction facing away from the gas exchange valve 1 on the opening magnet 4, or the opening magnet 4 is supported on the ring 47, whereby the ring 47 is exact in the longitudinal direction is positioned. Below the opening magnet 4, the path to the play compensation element 11 is relatively short and the pressure oil can be supplied cheaply without the movement of the armature 6 being impeded.
- the annular groove 48 connects inwards to a guide 21 of the armature plunger 16, which is inserted in the opening magnet 4.
- the guide 21 has a transverse channel 45 which opens inwards to the anchor plunger 16 in an annular groove 20.
- a transverse channel 19 connected to the channel 18 comes to rest in the anchor plunger 16 above the annular groove 20 in the guide 21.
- the play compensation element 11 is thus connected to the pressure connection 13 shortly before and in the closed position and is supplied with pressure oil in order, if necessary, to expand to a corresponding length.
- the ring 47, the guide 21 and the anchor plunger 16 can be installed in a rotationally symmetrical manner, regardless of the orientation, which simplifies assembly. Also contributes to a simple assembly that the guide 21 is fixed in the longitudinal direction by a step 50 on the opening magnet 4, whereby the transverse channel 45 can be easily and exactly positioned in the guide 21 in the longitudinal direction during assembly.
- the ring 47 can be designed as a single part; but it can also be made in one piece on Opening magnets 4 may be formed and thus form an integral part.
- the channel 18 can also be connected to the pressure connection 13 in other areas, such as in the guide 21 of the armature plunger 16, for example in the case of a continuous channel 18 from the direction of the closing magnet 5, etc.
- the guide 21 is particularly suitable for this, however, since a existing friction surface is used, ie no new one is added and this is additionally lubricated with pressure oil, thereby reducing friction.
- the play compensation element 11 has a cylinder 22 and a piston 24, between which a pressure chamber 26 is enclosed.
- the pressure chamber 26 is connected to an adjacent chamber 28, a spring chamber, via a throttle, not shown, and to the channel 18 via a check valve 27.
- the play compensation element 11 is designed as an independent, functional unit which is attached to the anchor plunger 16 and can thus be preassembled and checked in advance.
- the play compensation element 11 can be plugged on easily and is nevertheless designed to be captive, for example by means of an O-ring (not shown) which engages in an annular groove, etc.
- FIG. 3 shows a play compensation element 12 in which a piston 25 is formed by part of the armature tappet 17. Only one type of cylinder 23 is pushed over the armature tappet 17, between which and the armature tappet 17 the pressure chamber 26 is formed. The check valve 27 is inserted into a recess 55 in the armature tappet 17.
- the game compensation element 12 can be carried out more cheaply and easily. The moving mass is reduced.
- the valve stem 9 forms parts of the lash adjuster element 12, for example by the cylinder 23 being made in one piece with the valve stem 9, ie the lash adjuster element 12 could be completely formed by the armature tappet 17 and the valve stem 9 except for the check valve 27.
- the play compensation element 10, 11, 12 adjusts to its exact length in the first closed position of the gas exchange valve 1, i.e. that the armature 6 comes to rest exactly on the pole face of the closing magnet 5 and a valve disc 53 of the gas exchange valve 1 completely seals against a valve seat ring 54.
- the play compensation element 10, 11, 12 is under compressive stress and has the tendency to shorten in order to always close reliably by oil flowing continuously into the spring chamber via a throttle. If the play compensation element 10, 11, 12 has become too short due to the leakage, this is adjusted to the exact length again in the closed position of the gas exchange valve 1 by the check valve 27 opening and the pressure chamber 26 being connected to the pressure connection 13.
- the gas exchange valve 1 constantly moves in an area of optimal play without the play compensation element 10, 11, 12 inflating.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728479 | 1997-07-05 | ||
DE19728479A DE19728479C2 (en) | 1997-07-05 | 1997-07-05 | Device for actuating a gas exchange valve with an electromagnetic actuator |
PCT/EP1998/004067 WO1999002823A1 (en) | 1997-07-05 | 1998-07-01 | Device for operating a gas shuttle valve by means of an electromagnetic actuator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0995015A1 true EP0995015A1 (en) | 2000-04-26 |
EP0995015B1 EP0995015B1 (en) | 2002-09-18 |
Family
ID=7834565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939598A Expired - Lifetime EP0995015B1 (en) | 1997-07-05 | 1998-07-01 | Device for operating a gas shuttle valve by means of an electromagnetic actuator |
Country Status (8)
Country | Link |
---|---|
US (1) | US6502804B1 (en) |
EP (1) | EP0995015B1 (en) |
JP (1) | JP3513519B2 (en) |
KR (1) | KR100396383B1 (en) |
CN (1) | CN1109181C (en) |
BR (1) | BR9810671A (en) |
DE (2) | DE19728479C2 (en) |
WO (1) | WO1999002823A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19745522C2 (en) * | 1997-10-15 | 2001-03-22 | Daimler Chrysler Ag | Device for actuating a gas exchange valve of a reciprocating piston internal combustion engine |
DE19901068A1 (en) * | 1999-01-14 | 2000-07-27 | Daimler Chrysler Ag | Gas exchange valve with electromagnetic actuator has armature whose position with respect to magnet pole surfaces is determined by play compensation element |
DE19947758C2 (en) * | 1999-10-02 | 2003-01-23 | Daimler Chrysler Ag | Device for actuating a gas exchange valve with an electromagnetic actuator |
DE10000045A1 (en) * | 2000-01-02 | 2001-07-05 | Leiber Heinz | Electromagnetic actuator |
DE10051549A1 (en) * | 2000-10-18 | 2002-04-25 | Bosch Gmbh Robert | Solenoid valve to control fuel injection valve of IC engines has armature pin with part sliding between fixed and moveable stop |
DE10256274A1 (en) * | 2001-12-27 | 2003-07-17 | Mahle Ventiltrieb Gmbh | Producing method of gas shuttle valve for internal combustion engine involves correctly fitting and permanently bonding valve shaft and thrust section to predetermined length |
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 |
DE10261022A1 (en) * | 2002-12-24 | 2004-07-08 | Robert Bosch Gmbh | Method and control device for actuating solenoid valves associated with gas exchange valves |
AU2003900703A0 (en) * | 2003-02-18 | 2003-03-06 | R. McDonald Co. Pty. Ltd | A cooking surface |
US20050076866A1 (en) * | 2003-10-14 | 2005-04-14 | Hopper Mark L. | Electromechanical valve actuator |
US7255073B2 (en) * | 2003-10-14 | 2007-08-14 | Visteon Global Technologies, Inc. | Electromechanical valve actuator beginning of stroke damper |
FR2864574B1 (en) | 2003-12-24 | 2006-02-10 | Peugeot Citroen Automobiles Sa | POWER SUPPLY CIRCUIT FOR A HYDRAULIC STOP, FOR RETRIEVING THE OPERATING SET BETWEEN A VALVE OF AN INTERNAL COMBUSTION ENGINE AND ITS ACTUATION DEVICE |
JP2005351218A (en) * | 2004-06-11 | 2005-12-22 | Toyota Motor Corp | Electromagnetically driven valve |
JP4155243B2 (en) * | 2004-08-04 | 2008-09-24 | トヨタ自動車株式会社 | Solenoid valve |
JP2006070968A (en) * | 2004-09-01 | 2006-03-16 | Toyota Motor Corp | Solenoid driving valve |
US7121266B2 (en) * | 2004-09-28 | 2006-10-17 | Denso International America, Inc. | Fuel pump cutoff shuttle valve |
US7305942B2 (en) * | 2005-02-23 | 2007-12-11 | Visteon Global Technologies, Inc. | Electromechanical valve actuator |
FR2969732B1 (en) * | 2010-12-22 | 2013-01-11 | Valeo Sys Controle Moteur Sas | SYSTEM COMPRISING A VALVE AND AN ELECTROMAGNETIC ACTUATOR FOR DISPLACING THIS VALVE |
SE543886C2 (en) * | 2012-07-06 | 2021-09-14 | Freevalve Ab | Actuator for axial displacement of a gas exchange valve at an internal combustion engine |
CN105257360A (en) * | 2015-10-23 | 2016-01-20 | 杰锋汽车动力***股份有限公司 | Valve switch control device of engine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3311250C2 (en) * | 1983-03-28 | 1985-08-01 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen | Device for the electromagnetic actuation of a gas exchange valve for positive displacement machines |
JPS6386307U (en) | 1986-11-25 | 1988-06-06 | ||
US5261610A (en) * | 1990-09-18 | 1993-11-16 | Nordson Corporation | Coating dispenser with hydraulic-assisted valve closure |
DE19511880A1 (en) | 1994-04-08 | 1995-10-12 | Audi Ag | Operating device for gas substitution valves on reciprocating engines |
DE19607019A1 (en) * | 1996-02-24 | 1997-08-28 | Daimler Benz Ag | Electromagnetic operating device for IC engine gas changing valve |
DE29604946U1 (en) * | 1996-03-16 | 1997-07-17 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Electromagnetic actuator for a gas exchange valve with valve clearance compensation |
DE19615435A1 (en) * | 1996-04-19 | 1997-10-23 | Daimler Benz Ag | Device for the electromagnetic actuation of a gas exchange valve for internal combustion engines |
DE19624296A1 (en) * | 1996-06-18 | 1998-01-02 | Bayerische Motoren Werke Ag | Electromagnetic actuating device for internal combustion engine lift valves |
DE19647305C1 (en) * | 1996-11-15 | 1998-02-05 | Daimler Benz Ag | Electromagnetic operating device e.g. for IC engine gas-exchange valve |
DE29703584U1 (en) * | 1997-02-28 | 1998-06-25 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Electromagnetic actuator with fluid impact damping |
-
1997
- 1997-07-05 DE DE19728479A patent/DE19728479C2/en not_active Expired - Fee Related
-
1998
- 1998-07-01 JP JP50809099A patent/JP3513519B2/en not_active Expired - Fee Related
- 1998-07-01 KR KR10-2000-7000054A patent/KR100396383B1/en not_active IP Right Cessation
- 1998-07-01 US US09/462,159 patent/US6502804B1/en not_active Expired - Lifetime
- 1998-07-01 DE DE59805629T patent/DE59805629D1/en not_active Expired - Lifetime
- 1998-07-01 CN CN98806746A patent/CN1109181C/en not_active Expired - Fee Related
- 1998-07-01 BR BR9810671-6A patent/BR9810671A/en not_active IP Right Cessation
- 1998-07-01 EP EP98939598A patent/EP0995015B1/en not_active Expired - Lifetime
- 1998-07-01 WO PCT/EP1998/004067 patent/WO1999002823A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9902823A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR100396383B1 (en) | 2003-09-02 |
JP3513519B2 (en) | 2004-03-31 |
US6502804B1 (en) | 2003-01-07 |
DE19728479C2 (en) | 2001-08-30 |
EP0995015B1 (en) | 2002-09-18 |
CN1261943A (en) | 2000-08-02 |
CN1109181C (en) | 2003-05-21 |
KR20010015550A (en) | 2001-02-26 |
WO1999002823A1 (en) | 1999-01-21 |
DE59805629D1 (en) | 2002-10-24 |
JP2000513423A (en) | 2000-10-10 |
DE19728479A1 (en) | 1999-01-07 |
BR9810671A (en) | 2000-09-26 |
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