EP1241324B1 - Method at shutdown of an internal combustion engine with electromagnetic valves - Google Patents
Method at shutdown of an internal combustion engine with electromagnetic valves Download PDFInfo
- Publication number
- EP1241324B1 EP1241324B1 EP02002500A EP02002500A EP1241324B1 EP 1241324 B1 EP1241324 B1 EP 1241324B1 EP 02002500 A EP02002500 A EP 02002500A EP 02002500 A EP02002500 A EP 02002500A EP 1241324 B1 EP1241324 B1 EP 1241324B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- gas exchange
- exchange valve
- valve
- internal combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
- F01L2009/2132—Biasing means
- F01L2009/2134—Helical springs
- F01L2009/2136—Two opposed springs for intermediate resting position of the armature
-
- 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
- F01L9/40—Methods of operation thereof; Control of valve actuation, e.g. duration or lift
- F01L2009/4086—Soft landing, e.g. applying braking current; Levitation of armature close to core surface
-
- 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
- F01L9/40—Methods of operation thereof; Control of valve actuation, e.g. duration or lift
- F01L2009/4098—Methods of operation thereof; Control of valve actuation, e.g. duration or lift relating to gap between armature shaft and valve stem end
-
- 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
- F01L2800/03—Stopping; Stalling
Definitions
- the invention relates to a method for switching off an internal combustion engine electromagnetically operated gas exchange valves.
- the anchor has an anchor plunger that is at least partially is in direct contact with a valve tappet and therefore also the valve moved back and forth between an open and a closed position.
- Embodiments are known in which between the anchor plunger and there is a rigid connection to the valve lifter.
- the present invention is directed however, relate to embodiments in which there is no rigid connection between Armature and valve lifters are present.
- valve and Anchor tappet there is between valve and Anchor tappet a so-called valve lash adjuster, with which the distance of the two aforementioned parts can be adjusted to each other.
- valve plate is moved from the armature into an open position of the armature in its open position spent.
- the anchor tappet must always be on the valve tappet seated.
- the valve disc In the other end position, however, in which the anchor on one So-called normally open electromagnet is present, the valve disc is in its closed position on the cylinder head, and is in this state with the invention Embodiments a distance between the valve lifter and the armature lifter. It can now be released by controlling the electromagnets accordingly the anchor from its end position corresponding to the closed position of the normally closed electromagnet, it moves to the other end position on its way to a position at which the anchor tappet for resting on the valve tappet arrives.
- the object of the present invention is the known method mentioned at the outset to develop in such a way that even when the engine is switched off, if possible wear and noise-free operation can be guaranteed.
- the deactivation can preferably take place in a controlled manner, i. H. it can be a regulated one Braking the armature in the direction of its rest position can be brought about. This can be achieved, for example, by further energizing the opening electromagnets. With such a controlled or regulated decay process be avoided that the electromagnetically operated valve again in a Position in which there is a distance between the armature and the valve tappet, which in turn can lead to the disadvantages mentioned above.
- the electromagnetically operated gas exchange valve shown in Figures 1 and 2 is built up essentially in a known manner.
- an actuator 10 provided with two spaced poles 12 and 14, in the grooves of each an electromagnetic coil is embedded.
- an armature 16 is arranged, which by alternating energization of the two Coils can be moved back and forth.
- the anchor has an anchor shaft 34, which - in the present figures - protrudes downwards.
- the actuator 10 is seated on a cylinder head 22, of which however only a section is shown.
- the cylinder head 22 has a recess, at the end opposite the actuator 10, a valve with a valve lifter 28 is mounted to slide back and forth.
- a valve plate 30 is arranged, against which one is shown only schematically Spring 20 is supported.
- the other end of the spring 20 is supported against one another spring seat 24, which is arranged on the cylinder head 22.
- the spring 20 biases the valve 26 to its closed position.
- a spring plate 32 is also arranged at the lower end of the armature tappet 34, against which a second valve spring 18 is supported.
- the valve spring 18 is supported their other end against the housing of the actuator 10 and acts on the Anchor in its open position.
- the armature 16 is shown by the alternating loading of the Coils moved back and forth, whereby the gas exchange valve 26 between its open and closed position is moved back and forth.
- 1 shows the closed position of the valve and the upper end position of the armature 16
- 2 shows the open position of the valve 26 and the other end position of the armature 16.
- the valve plate of valve 26 is on the cylinder head and the anchor 16 comes to rest on the upper yoke 12.
- valve tappet 28 There is between the valve tappet 28 and the armature tappet 34 a distance 36 upper coil deactivated and the lower coil activated, so the anchor - too using the energy stored in the spring 18 - in its other end position moves, whereby the armature plunger 34 after the distance 36 hits the valve lifter and urges the valve into its open position.
- measures are provided so that the Anchor plunger 34 as possible after detaching the anchor 16 from the upper yoke 12 strikes the plunger 28 gently.
- the upper coil briefly energized again, resulting in a braking pulse and thus a slower one Detachment and "flying away" of the anchor leads, reducing the speed of the armature when the armature tappet 34 is placed on the valve tappet 28 is low can be held.
- the lower electromagnet is activated so that the valve 26 in its in Fig. 2 shown open position can be spent.
- the problem is solved that even after the parking the internal combustion engine as little noise and wear as possible of the armature tappet can be reached on the valve tappet 28.
- To this Purpose is in an internal combustion engine with several electromagnetically actuated Gas exchange valves checked which anchor is essentially in its open position. With this anchor, the measure then becomes gentle Placing the anchor tappet 34 on the valve tappet 28 is still carried out and in addition the anchor operated for this period. Only then will the actuator 10 deactivated.
- a controlled one The armature is brought to a halt by the opening magnet 12 as well after placing the anchor tappet 34 on the valve tappet 28 still slightly is energized. As a result, a restrained moment comes to anchor 16 to the effect, so that this slower and without further reverberation in moves its rest position.
- the present invention thus also when the internal combustion engine is switched off ensures a low-noise and low-wear mode of operation.
Description
Die Erfindung betrifft ein Verfahren zum Abstellen einer Brennkraftmaschine mit elektromagnetisch betätigten Gaswechselventilen.The invention relates to a method for switching off an internal combustion engine electromagnetically operated gas exchange valves.
Derartige Brennkraftmaschinen sind aus dem Stand der Technik bereits hinlänglich bekannt. Dabei wird in den meisten Fällen ein Anker gegen die Wirkung zweier Fedem durch eine alternierende Beaufschlagung zweier beabstandeter Elektromagneten hin- und herbewegt. Der Anker besitzt einen Ankerstößel, der zumindest teilweise mit einem Ventilstößel direkt in Kontakt steht und dadurch das Ventil ebenfalls zwischen einer Offen- und einer Geschlossenstellung hin- und herbewegt.Such internal combustion engines are already adequate from the prior art known. In most cases, it becomes an anchor against the action of two springs by alternately applying two spaced electromagnets moved back and forth. The anchor has an anchor plunger that is at least partially is in direct contact with a valve tappet and therefore also the valve moved back and forth between an open and a closed position.
Es sind Ausführungsformen bekannt, bei denen zwischen dem Ankerstößel und dem Ventilstößel eine starre Verbindung besteht. Die vorliegende Erfindung richtet sich jedoch auf Ausführungsformen, bei denen keine starre Verbindung zwischen Anker- und Ventilstößel vorliegt. In manchen Fällen befindet sich zwischen Ventilund Ankerstößel ein sog. Ventilspielausgleichselement, mit dem der Abstand der beiden vorgenannten Teile zueinander eingestellt werden kann.Embodiments are known in which between the anchor plunger and there is a rigid connection to the valve lifter. The present invention is directed however, relate to embodiments in which there is no rigid connection between Armature and valve lifters are present. In some cases there is between valve and Anchor tappet a so-called valve lash adjuster, with which the distance of the two aforementioned parts can be adjusted to each other.
Der Ventilteller wird vom Anker in einer Endstellung des Ankers in seine Offenstellung verbracht. In diesem Zustand muss der Ankerstößel immer auf dem Ventilstößel aufsitzen. In der anderen Endposition jedoch, in welcher der Anker an einem sog. Schließer-Elektromagneten anliegt, liegt der Ventilteller in seiner Schließstellung am Zylinderkopf auf, und in diesem Zustand befindet sich bei den erfindungsgemäßen Ausführungsformen ein Abstand zwischen dem Ventilstößel und dem Ankerstößel. Löst sich nun durch eine entsprechende Steuerung der Elektromagnete der Anker aus seiner der Geschlossenstellung entsprechenden Endstellung von dem Öffner-Elektromagneten ab, so gelangt er auf seinem Weg in die andere Endposition an eine Position, an welcher der Ankerstößel zur Auflage auf den Ventilstößel gelangt. Dieses Auftreffen sollte möglichst sanft durchgeführt werden, um sowohl negative Abnützungs- als auch Lärmemissionseffekte gering zu halten. Aus diesem Grund ist es bekannt, Maßnahmen zu ergreifen, die ein sanftes Aufsetzen des Ankerstößels auf den Ventilstößel sicherstellen. Aus der WO-00/71861 ist es beispielsweise bekannt bei einem solchen Verfahren, den Öffner-Elektromagneten kurzzeitig zu bestromen, so dass der Anker beim Ablösen vom Öffner-Elektromagneten einen Bremsimpuls erhält, wodurch auch ein Abbremsen des Ankerstößels stattfindet und dieser zu gegebener Zeit sanft auf dem Ventilstößel aufsetzen kann.The valve plate is moved from the armature into an open position of the armature in its open position spent. In this state, the anchor tappet must always be on the valve tappet seated. In the other end position, however, in which the anchor on one So-called normally open electromagnet is present, the valve disc is in its closed position on the cylinder head, and is in this state with the invention Embodiments a distance between the valve lifter and the armature lifter. It can now be released by controlling the electromagnets accordingly the anchor from its end position corresponding to the closed position of the normally closed electromagnet, it moves to the other end position on its way to a position at which the anchor tappet for resting on the valve tappet arrives. This impact should be done as gently as possible to both to keep negative wear and noise emissions low. Out for this reason, it is known to take measures that require a gentle touchdown ensure the anchor tappet on the valve tappet. From WO-00/71861 it is known, for example, in such a method, the normally closed electromagnet energize briefly so that the armature when detached from the normally closed electromagnet receives a braking pulse, which also brakes the armature plunger takes place and gently place it on the valve tappet at the appropriate time can.
Problematisch ist nunmehr der Zeitraum, in dem das Fahrzeug abgestellt wird. Beim Abstellen der Brennkraftmaschine wird nämlich herkömmlicherweise der Betrieb der Elektromagnetspulen eingestellt, so dass die Anker und die Gaswechselventile beispielsweise in ihre Ruhelage ausschwingen.The period in which the vehicle is parked is now problematic. At the Shutting down the engine is namely the operation of the Electromagnetic coils set so that the armature and the gas exchange valves for example swing out to their rest position.
Aufgabe der vorliegenden Erfindung ist es, das bekannte eingangs genannte Verfahren derart weiterzuentwickeln, dass auch beim Abstellen des Motors ein möglichst abnützungs- und lärmfreier Betrieb gewährleistet werden kann.The object of the present invention is the known method mentioned at the outset to develop in such a way that even when the engine is switched off, if possible wear and noise-free operation can be guaranteed.
Diese Aufgabe wird durch die im Anspruch 1 angegebenen Schritte gelöst.This object is achieved by the steps specified in claim 1.
Demgemäss wird auch nach dem Abstellen der Brennkraftmaschine ein Betrieb derjenigen Aktuatoren fortgesetzt, bei denen sich der Anker im wesentlichen in geöffneter Position befindet und damit von dem Ventilstößel beabstandet ist. Durch diesen fortgesetzten Betrieb werden auch weiterhin die Maßnahmen zum sanften Aufsetzen des Ankerstößels auf den Ventilstößel sichergestellt ist. Konkret wird zunächst festgestellt, ob sich ein Anker eines elektromagnetisch betätigten Gaswechselventils im wesentlichen in seiner geöffneten Position befindet. Ist dies der Fall, so wird dieser Anker noch bis zum sanften Aufsetzen des Ankerstößels auf den Ventilstößel betrieben und danach erst deaktiviert.Accordingly, operation continues even after the internal combustion engine has been switched off of those actuators where the armature is essentially in is in the open position and is thus spaced from the valve lifter. By this continued operation will continue to be the measures for gentle Placing the anchor tappet on the valve tappet is ensured. First, it will be concrete determined whether there is an armature of an electromagnetically operated gas exchange valve is essentially in its open position. If so, so becomes this anchor until the anchor tappet is gently placed on the valve tappet operated and only deactivated afterwards.
Vorzugsweise kann die Deaktivierung kontrolliert erfolgen, d. h. es kann ein geregeltes Abbremsen des Ankers in Richtung seiner Ruhestellung herbeiführt werden. Dies ist beispielsweise durch weiteres Bestromen der Öffner-Elektromagneten realisierbar. Mit einem solchen gesteuerten oder geregelten Ausschwingvorgang kann vermieden werden, dass das elektromagnetisch betätigte Ventil nochmals in eine Stellung kommt, in der ein Abstand zwischen dem Anker und dem Ventilstößel auftritt, was wiederum zu den oben genannten Nachteilen führen kann.The deactivation can preferably take place in a controlled manner, i. H. it can be a regulated one Braking the armature in the direction of its rest position can be brought about. This can be achieved, for example, by further energizing the opening electromagnets. With such a controlled or regulated decay process be avoided that the electromagnetically operated valve again in a Position in which there is a distance between the armature and the valve tappet, which in turn can lead to the disadvantages mentioned above.
Eine konkrete Ausführungsform der vorliegenden Erfindung wird nachfolgend und mit Bezug auf die beiliegenden Zeichnungen näher erläutert. Die beiliegenden Zeichnungen zeigen in
- Fig. 1
- eine schematische Teilschnittansicht durch ein elektromagnetisch betätigtes Gaswechselventil in seiner Geschlossenstellung und
- Fig. 2
- eine schematische Darstellung wie in Fig. 1, wobei das Gaswechselventil sich jedoch in seiner Offenstellung befindet.
- Fig. 1
- is a schematic partial sectional view through an electromagnetically operated gas exchange valve in its closed position and
- Fig. 2
- a schematic representation as in Fig. 1, but the gas exchange valve is in its open position.
Das in den Figuren 1 und 2 dargestellte elektromagnetisch betätigte Gaswechselventil
ist im wesentlichen in bekannter Weise aufgebaut. Insbesondere ist ein Aktuator
10 mit zwei beabstandeten Polen 12 und 14 vorgesehen, in deren Nuten jeweils
eine Elektromagnetspule eingebettet ist. Im Abstand zwischen den beiden Polen 12
und 14 ist ein Anker 16 angeordnet, der durch alternierende Bestromung der beiden
Spulen hin- und herbewegt werden kann. Der Anker weist einen Ankerschaft 34 auf,
der - in den vorliegenden Figuren - nach unten übersteht.The electromagnetically operated gas exchange valve shown in Figures 1 and 2
is built up essentially in a known manner. In particular, is an
Der Aktuator 10 sitzt vorliegend auf einem Zylinderkopf 22 auf, von dem jedoch lediglich
ein Ausschnitt dargestellt ist. Der Zylinderkopf 22 besitzt eine Ausnehmung,
an deren dem Aktuator 10 entgegengesetzten Ende ein Ventil mit einem Ventilstößel
28 hin- und herverschiebbar gelagert ist. Am oberen Ende des Ventilstößels 28
ist ein Ventilteller 30 angeordnet, gegen welchen sich eine nur schematisch dargestellte
Feder 20 abstützt. Das andere Ende der Feder 20 stützt sich gegen einen
weiteren Federsitz 24 ab, der am Zylinderkopf 22 angeordnet ist. Die Feder 20
spannt das Ventil 26 in seine Geschlossenstellung vor.In the present case, the
Am unteren Ende des Ankerstößels 34 ist ebenfalls ein Federteller 32 angeordnet,
gegen den sich eine zweite Ventilfeder 18 abstützt. Die Ventilfeder 18 stützt sich mit
ihrem anderen Ende gegen das Gehäuse des Aktuators 10 ab und beaufschlagt den
Anker in seine geöffnete Position.A
Beim Betrieb wird der Anker 16 durch die alternierende Beaufschlagung der gezeigten
Spulen hin- und herbewegt, wodurch auch das Gaswechselventil 26 zwischen
seiner Offen- und Geschlossenstellung hin- und herbewegt wird. Dabei zeigt Fig. 1
die Geschlossenstellung des Ventils und die obere Endstellung des Ankers 16 und
die Fig. 2 die Offenstellung des Ventils 26 und die andere Endstellung des Ankers
16. In seiner Geschlossenstellung liegt der Ventilteller des Ventils 26 am Zylinderkopf
an und der Anker 16 kommt am oberen Joch 12 zur Anlage. Dabei besteht zwischen
dem Ventilstößel 28 und dem Ankerstößel 34 ein Abstand 36. Wird nun die
oberen Spule deaktiviert und die untere Spule aktiviert, so wird der Anker - auch
unter Ausnutzung der in der Feder 18 gespeicherten Energie - in seine andere Endstellung
bewegt, wodurch der Ankerstößel 34 nach Überwindung des Abstandes 36
auf den Ventilstößel auftrifft und das Ventil in seine Offenstellung drängt. Um Abnützungs-
und Lärmnachteile zu vermeiden, sind Maßnahmen vorgesehen, damit der
Ankerstößel 34 nach dem Ablösen des Ankers 16 vom oberen Joch 12 möglichst
sanft auf den Ankerstößel 28 auftrifft. Beispielsweise wird dazu die obere Spule
kurzzeitig nochmals bestromt, was zu einem Bremsimpuls und damit zu einem langsameren
Ablösen und "Losfliegen" des Ankers führt, wodurch die Geschwindigkeit
des Ankers beim Aufsetzen des Ankerstößels 34 auf den Ventilstößel 28 gering
gehalten werden kann. Nach dem Aufsetzen des Ankerstößels 34 auf den Ventilstößel
28 wird der untere Elektromagnet aktiviert, so dass das Ventil 26 in seine in
Fig. 2 dargestellte Offenstellung verbracht werden kann.In operation, the
Mit der vorliegenden Erfindung wird das Problem gelöst, dass auch nach dem Abstellen
der Brennkraftmaschine ein möglichst geräusch- und abnützungsarmes Auftreffen
des Ankerstößels auf den Ventilstößel 28 erreicht werden kann. Zu diesem
Zweck wird bei einer Brennkraftmaschine mit mehreren elektromagnetisch betätigten
Gaswechselventilen nachgeprüft, welcher Anker sich im wesentlichen in seiner
geöffneten Position befindet. Bei diesem Anker wird dann die Maßnahme zum sanften
Aufsetzen des Ankerstößels 34 auf den Ventilstößel 28 noch durchgeführt und
dazu der Anker noch für diesen Zeitraum betrieben. Erst danach wird der Aktuator
10 deaktiviert. Bei der vorliegenden Ausführungsform wird darüber hinaus ein gesteuertes
Anhalten des Ankers herbeigeführt, indem der Öffnermagnet 12 auch
nach dem Aufsetzen des Ankerstößels 34 auf den Ventilstößel 28 noch geringfügig
bestromt wird. Dadurch kommt weiterhin ein rückhaltendes Moment auf den Anker
16 zur Wirkung, so dass dieser langsamer und ohne weitere Nachschwingung in
seine Ruheposition verfährt.With the present invention, the problem is solved that even after the parking
the internal combustion engine as little noise and wear as possible
of the armature tappet can be reached on the
Mit der vorliegenden Erfindung wird somit auch beim Abschalten der Brennkraftmaschine eine lärm- und abnützungsarme Betriebsweise sichergestellt.The present invention thus also when the internal combustion engine is switched off ensures a low-noise and low-wear mode of operation.
Claims (6)
- A method for shutting down an internal combustion engine with electromagnetically operated gas exchange valves, in which an armature is moved back and forth, by means of alternating current applied to two electro-magnets, between two end positions and impacts a gas exchange valve, so that this is moved back and forth between an open and a closed setting, and whereby in the closed position of the gas exchange valve the armature does not immediately abut the gas exchange valve,
with the steps,
that in the normal operation of the gas exchange valve, by suitable control of the current in the coil a measure is performed to provide a soft setting down of the armature coming from the closed position of the gas exchange valve onto the gas exchange valve,
characterised in that,
on shutting down the internal combustion engine a check is made before putting the individual gas exchange valves out of operation, as to whether the armature is essentially in its open position, and, if the check has a positive result the measures to ensure a soft setting down of the armature onto the gas exchange valve are performed and the putting of the engine out of operation is prevented until a negative result from the check is present. - A method according to Claim 1,
characterised in that the measure to assure a soft landing of the armature on the gas exchange valve is a braking process during the release of the armature from an open position electromagnet. - A method according to Claim 2,
characterised in that the braking process is brought about by the
application of current to the coil of the open position electromagnet. - A method according to one of the foregoing claims,
characterised in that,
a controlled or regulated arrest of the armature is carried out. - A method according to Claim 4,
characterised in that,
the armatures are brought into the rest position under control or regulation. - A method according to Claim 4 or Claim 5,
characterised in that,
the controlled or regulated arrest of the armature is effected by passing current through the electromagnets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10112999 | 2001-03-17 | ||
| DE10112999A DE10112999A1 (en) | 2001-03-17 | 2001-03-17 | Procedure for switching off an internal combustion engine with electromagnetically operated gas exchange valves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1241324A1 EP1241324A1 (en) | 2002-09-18 |
| EP1241324B1 true EP1241324B1 (en) | 2003-08-20 |
Family
ID=7677899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02002500A Expired - Lifetime EP1241324B1 (en) | 2001-03-17 | 2002-02-02 | Method at shutdown of an internal combustion engine with electromagnetic valves |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1241324B1 (en) |
| DE (2) | DE10112999A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2829177B1 (en) * | 2001-08-30 | 2005-12-02 | Peugeot Citroen Automobiles Sa | VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE |
| SE542805C2 (en) * | 2018-07-31 | 2020-07-14 | Hedman Ericsson Patent Ab | Electrically actuated valve actuator for an internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19529155B4 (en) * | 1995-08-08 | 2007-05-24 | Fev Motorentechnik Gmbh | Method for measuring the valve clearance on a gas exchange valve actuated by an electromagnetic actuator |
| DE19710974A1 (en) * | 1997-03-17 | 1998-09-24 | Bayerische Motoren Werke Ag | Method for keeping closed an IC engine gas change unit |
| DE19905492C1 (en) * | 1999-02-10 | 2000-05-04 | Daimler Chrysler Ag | Electromagnetic control of gas exchange valves in combustion engine, producing braking pulse against movement of armature in at least one phase of operating cycle |
| ATE296944T1 (en) * | 1999-03-31 | 2005-06-15 | Fev Motorentech Gmbh | GAS EXCHANGE VALVE ARRANGEMENT WITH ELECTROMAGNETIC ACTUATOR |
| WO2000071861A1 (en) * | 1999-05-19 | 2000-11-30 | Fev Motorentechnik Gmbh | Method for controlling an electromagnetic valve drive mechanism for a gas exchange valve in an internal combustion piston engine |
| DE10005247C1 (en) * | 2000-02-05 | 2001-02-15 | Daimler Chrysler Ag | 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 |
-
2001
- 2001-03-17 DE DE10112999A patent/DE10112999A1/en not_active Withdrawn
-
2002
- 2002-02-02 EP EP02002500A patent/EP1241324B1/en not_active Expired - Lifetime
- 2002-02-02 DE DE50200028T patent/DE50200028D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1241324A1 (en) | 2002-09-18 |
| DE10112999A1 (en) | 2002-09-19 |
| DE50200028D1 (en) | 2003-09-25 |
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