EP1307637A1 - Piston engine comprising deactivatable mechanically actuated gas exchange valves - Google Patents

Piston engine comprising deactivatable mechanically actuated gas exchange valves

Info

Publication number
EP1307637A1
EP1307637A1 EP01969516A EP01969516A EP1307637A1 EP 1307637 A1 EP1307637 A1 EP 1307637A1 EP 01969516 A EP01969516 A EP 01969516A EP 01969516 A EP01969516 A EP 01969516A EP 1307637 A1 EP1307637 A1 EP 1307637A1
Authority
EP
European Patent Office
Prior art keywords
partial
piston
roller
lever
gas exchange
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
Application number
EP01969516A
Other languages
German (de)
French (fr)
Other versions
EP1307637B1 (en
Inventor
Markus Duesmann
Joachim Hahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FEV Europe GmbH
Original Assignee
FEV Motorentechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FEV Motorentechnik GmbH and Co KG filed Critical FEV Motorentechnik GmbH and Co KG
Publication of EP1307637A1 publication Critical patent/EP1307637A1/en
Application granted granted Critical
Publication of EP1307637B1 publication Critical patent/EP1307637B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention has for its object to provide a piston internal combustion engine with deactivatable gas exchange valves, which has a simple structure of the valve trains.
  • a piston internal combustion engine with deactivatable, mechanically operated gas exchange valves each of which is actuated by at least one camshaft via a roller rocker arm with roller, which consists of two partial levers which are articulated to one another via an articulated axis, on which the roller assigned to a cam of the camshaft is rotatably mounted, and with a roller acting between the two partial levers same switchable locking means by which the power transmission between the camshaft and the gas exchange valve can be activated or deactivated, the free end of the one partial lever being supported on the gas exchange valve and a support being provided for the free end of the other partial lever on the engine block, and with a between the return spring, which presses the roller on the cams when the partial levers are unlocked.
  • the part of the gas exchange valve associated with the support has an extension, which extends over the hinge axis and covers a region of the part of the lever associated with the support, and that the locking means covers the region of the two that overlaps with the scissors Partial lever is assigned.
  • the locking means is formed by a piston-cylinder unit which can be pressurized with oil, which is arranged in the partial lever assigned to the support and which has a locking element which can be displaced parallel to the joint axis and has a piston part and a locking part having.
  • the locking part and the piston part can be derte components be formed or connected in one piece in an advantageous embodiment of the invention. It is useful here if a return spring is provided, which holds the locking element in its locked position, so that in normal operation the two partial levers are locked together and are only unlocked when the piston-cylinder unit is pressurized with pressure oil, thus deactivating the corresponding gas exchange valve ,
  • the supply of the piston-cylinder unit with pressure oil takes place via a hydraulic lash adjuster forming the support.
  • a hydraulic lash adjuster is already present in the arrangement of roller rocker arms, so that for the pressure oil supply to the piston-cylinder unit, only a corresponding pressure oil channel is to be provided in the partial lever resting on the compensating element, which with the cylinder of the piston cylinder -Unit is connected.
  • the spring force of the return spring of the piston-cylinder unit is dimensioned so that it is not compressed at the pressure level required for the play compensation and the given piston area, so that the role of the roller finger follower is always in contact with the cam.
  • At least the one associated with the gas exchange valve te partial lever is claw-shaped and overlaps the roller in the area of the hinge axis, with a claw part forming the extension.
  • Fig. 1 in a side view of a cam
  • Fig. 2 shows the gas exchange valve. 5 in the deactivated state
  • Fig. 3 shows a horizontal section. the line III-III through the roller rocker arm in Fig. 1 on a larger scale
  • Fig. 6 shows a section through the locking area acc. the line VI-V in Fig. 5,
  • Fig. 8 shows a partial longitudinal section. the line VIII-VIII in Fig. 7 in the locked position, Fig. 9 in partial longitudinal section. Fig. 8 the unlocked position.
  • FIG. 1 shows a mechanical cam valve train for actuating a gas exchange valve 1.
  • the gas exchange valve is provided on its shaft 2 with a spring plate 3, by means of which it is supported on a valve spring 4 and is held by the latter in the closed position.
  • a roller rocker arm 5 is provided, which is essentially formed by a partial lever 5.1 and a partial lever 5.2.
  • the two partial levers 5.1 and 5.2 are connected to one another in an articulated manner via an articulated axis 6, on which a roller 7 is freely rotatably supported, which abuts the cam 8 of the associated camshaft.
  • the roller rocker arm 5 is supported with its free end assigned to the partial lever 5.1 on the valve stem 2. With its free end assigned to the partial lever 5.2, the roller rocker arm 5 is supported by a calotte on the movable part 9 of a hydraulic lash adjuster 10 of a known type, which is firmly connected to the engine block 11 and via a corresponding channel arrangement 12 in the engine block with a pressurized oil supply in Connection is established.
  • a switchable locking means 13 is provided between the two partial levers 5.1 and 5.2, the structure and mode of operation of which will be explained in more detail below.
  • the two partial levers 5.1 and 5.2 form a rigid unit, so that when the cam 8 rotates, the gas exchange valve is opened and closed in accordance with the lifting height of the cam 8.
  • a return spring 14 arranged between the two partial levers 5.1 and 5.2 shown here only schematically as a helical compression spring, ensures that the two partial levers are pressed apart about the articulation axis 6 and thus the roller 7 when the two partial levers are unlocked with the control contour of the cam 8 remains in contact and is tracked on this.
  • the two partial levers can swing both about the articulation axis 6 and about their supports at the end 2.1 of the valve stem on the one hand and on the support, here the movable part 9 of the hydraulic compensating element on the other hand.
  • the locking means is correspondingly depressurized, so that the locking means can come into engagement again in the phase when the roller 7th is present via an existing return spring rests on area 8.1 of base circle area 8.1 of cam 8.
  • the roller rocker arm 5 is shown in a horizontal section on a larger scale.
  • the partial levers 5.1 and 5.2 are claw-like and encompasses the articulated axis 6 and the roller 7.
  • An extension 5.3 on the partial lever 5.1 covers the partial lever 5.2 laterally, so that the two partial levers are relatively scissors-like in the unlocked state can pivot to each other.
  • the locking means 13 is mounted in the partial lever 5.2.
  • this consists of a cylinder 15 in which a piston part 16 is slidably mounted.
  • a locking part 18 is slidably mounted against the force of a return spring 19.
  • the cylinder 15 is connected to a pressure oil supply via a supply duct 20. If the cylinder 15 is pressurized by a correspondingly high pressure oil, then the piston part 16 pushes the locking part 18 against the force of the return spring 19 as far as it will go into its recess 17.
  • the length of the locking part 18 is such that, in the unlocked state, as shown here, it enables the scissors-like relative movement of the two partial levers 5.1 and 5.2, the end faces of the locking part 18 on the one hand and the piston part 16 sliding on the other.
  • the return spring 19 pushes the locking part 18 and the piston part 16 back into the cylinder 15 during the rolling time of the roller 7 on the base circle 8.1 of the cam, the locking part 18 in the part of the cylinder 15 that is then released engages and the two partial levers 5.1 and 5.2 are locked together.
  • the restoring force must be large enough to push back that of the locking element very quickly.
  • the locking element can be modified in such a way that the locking element also acts as a piston. For this it is necessary to change the direction of the force of the return spring and the oil pressure and to design the piston differently accordingly.
  • a return spring arranged in the cylinder 15 presses the piston into the recess 17 in the depressurized state or at low oil pressure and locks the two partial levers against one another. If the part of the locking element designed as a piston is then pressurized in the opposite direction to the force of this spring, it is pushed back into the cylinder 15 and the locking part firmly connected to the piston is removed from the recess 17. pulled and releases the partial lever 5.1 compared to the partial lever 5.2.
  • the play compensation element 10 consists essentially of a cylinder part 10.1, in which the hollow support part 9 is guided like a piston. Via the supply line 12, the interior of the movable part 9 is pressurized with a predetermined low pressure oil, so that in each temperature position the roller 7 rests against the cam 8 and the free end of the partial lever 5.1 rests on the end at point 1 of the valve stem 2 is guaranteed.
  • the partial element 9 has a through hole 21 which is connected to the feed channel 20 and which, as shown in FIG. 3, opens into the cylinder 15.
  • the play compensation element 10 is subjected to a correspondingly increased pressure which is so great that the return spring 17 of the type according to FIG. 3 is compressed and the locking part 18 is completely in its receptacle 17 in the extension 5.3 of the partial lever 5.1 is inserted and so the two partial levers are disengaged.
  • roller rocker arm 5 is a modification of the embodiment according to. Fig. 1 shown.
  • the roller rocker arm 5 is firmly supported on the engine block via a support bolt 10.1.
  • the support bolt 10.1 is with a flow channel 11.1 provided, which is connected to the channel arrangement 12 of the pressure oil supply.
  • the roller finger follower 5 is supported and the locking means 13 is acted upon as in the embodiment described above in accordance with FIG. 1 ff. Structure and function are so far identical, so that reference is made to the above description, the same components being provided with the same reference numerals.
  • the arrangement of the return spring 14 makes it possible to dispense with a hydraulic valve play compensation element and thus to implement a valve train with mechanical play without using a rocker arm axis.
  • the arrangement of the return spring 14 makes it possible for a contact closure between the roller 7 and the cam to be maintained both in the base circle and in the area of the cam ramp, even when the partial levers are locked against one another.
  • the end region of the cylinder 15 is provided with a groove-shaped extension 15.1, which extends in the direction of the pivoting movement of the two partial lifts 5.1 and 5.2.
  • Fig. 6 shows this arrangement in a section acc. the line VI-VI in Fig. 5, the arrangement being shown in the locked position.
  • the locking part 18 engages in the groove-shaped extension 15.1 and is held in the locking position via the return spring 19, as described for FIG. 3. Due to the groove-like extension 15.1, the length of which approximately corresponds to the size of the valve clearance to be expected, it is possible that the two partial levers 5.1 and 5.2 can move relative to one another in the direction of the arrows 21 and 22.
  • the return spring 14 ensures that the roller 7 always bears against the control contour 8.1 of the cam 8. Nonetheless, thermal or wear-related changes in length of the valve stem are compensated for, so that the valve is held reliably in the closed position by its valve spring as long as the roller 7 rolls on the base circle area 8.1 of the cam 8. As soon as the roller 7 runs onto the cam contour, the locking part 18 arrives at the end the groove-shaped extension 15.1 to the system so that the valve can be opened against the force of the valve spring 4 via the cams.
  • valve in question If the valve in question is to be deactivated, the piston 16, as described above with reference to FIG. 3, is advanced via the oil pressure against the force of the return spring 19, so that the locking between the two partial levers 5.1 and 5.2 is released.
  • FIG. 7 shows an embodiment of the locking means 13 which is modified compared to FIG. 3.
  • the modification essentially consists in that the locking part 18.1 is integrally connected to the piston part 16.1 via a web part 16.2.
  • the partial lever 5.1 has at its end facing the locking element 13 a locking lug 5.4, the width of which is dimensioned such that in the unlocking position shown in FIG. 7, the cylinder 15 is pressurized with oil, through the space between the piston part 16.1 and can pivot the locking part 18.1. If the cylinder 15 is depressurized, the return spring 19 presses the locking part 18.1 together with the piston back into the cylinder 15, so that the locking part 18.1 can engage under the locking nose 5.4 as soon as the roller 7 passes through the base circle area 8.1 in the cam 8.
  • Fig. 8 shows how in the locked position the locking lug 5.4 is supported on the locking part 18.1. It can easily be seen that when the locking part 18.1 is moved into the position shown in FIG. 7, the locking nose 5.4 is released and the two partial levers 5.1 and 5.2 can pivot downwards in the direction of the two arrows, as shown in FIG. 9 is shown.
  • the return spring is not shown here to simplify the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

A piston-type internal-combustion engine having deactivatable, mechanically actuated cylinder valves that are respectively actuated by at least one camshaft via a roller drag lever (5) comprising two partial levers (5.1, 5.2) that are hinged to one another via an articulated shaft (6), on which the roller (7) associated with a cam (8) of the camshaft is rotatably seated. A locking mechanism (13) is provided to selectively couple or decouple the two partial levers (5.1, 5.2) to activate or deactivate the force transmission between the camshaft and the cylinder valve. The free end 5.11 of one partial lever (5.1) is supported on the cylinder valve (2), and the free end 5.21 of the other partial lever (5.2) is supported on the engine block (11).

Description

Bezeichnung Kolbenbrennkraftmaschine mit deaktivierbaren, mechanisch betätigten GaswechselventilenDescription Piston internal combustion engine with deactivatable, mechanically operated gas exchange valves
Beschreibungdescription
Auch bei einer Kolbenbrennkraftmaschine mit mechanisch betätigten Gaswechselventilen, die mit Hilfe wenigstens einer Nockenwelle über Rollenschlepphebel betätigt werden, besteht die Möglichkeit, durch Deaktivierung der Gaswechselventile an einem Teil der Zylinder beispielsweise die Maschine in Teillast so zu betreiben, daß nur ein Teil der Zylinder befeuert wird, während die Zylinder mit deaktivierten Gaswechselventi- len nicht befeuert werden, sondern leer mitlaufen. Die Deaktivierung der Gaswechselventile kann dann zyklisch vorgenom- men werden, so daß unter Berücksichtigung der Laufruhe immer jeweils andere Zylinder befeuert werden. Die Befeuerung der aktiven Zylinder kann dann unter Volllastbedingungen und damit unter optimalen Betriebsbedingungen erfolgen, wobei die Kolbenbrennkraftmaschine insgesamt nur eine Teillast abgibt.Even in a piston internal combustion engine with mechanically operated gas exchange valves, which are actuated with the aid of at least one camshaft via roller cam followers, it is possible, for example, to operate the engine at part load by deactivating the gas exchange valves on part of the cylinders so that only part of the cylinders are fired , while the cylinders with deactivated gas exchange valves are not fired, but run empty. The gas exchange valves can then be deactivated cyclically, so that other cylinders are always fired taking into account the smooth running. The active cylinders can then be fired under full load conditions and thus under optimum operating conditions, the piston internal combustion engine delivering only a partial load overall.
Die bisher bekannt gewordenen Mittel zur Deaktivierung der Gaswechselventile sind konstruktiv sehr aufwendig und erfordern erheblichen Bauraum.The previously known means for deactivating the gas exchange valves are structurally very complex and require considerable installation space.
Der Erfindung liegt die Aufgabe zugrunde, eine Kolbenbrennkraftmaschine mit deaktivierbaren Gaswechselventilen zu schaffen, die einen einfachen Aufbau der Ventiltriebe aufweist.The invention has for its object to provide a piston internal combustion engine with deactivatable gas exchange valves, which has a simple structure of the valve trains.
Diese Aufgabe wird gemäß der Erfindung gelöst mit einer Kol- benbrennkraftmaschine mit deaktivierbaren, mechanisch betätigten Gaswechselventilen, die jeweils durch wenigstens eine Nockenwelle über einen Rollenschlepphebel mit Rolle betätigt werden, der aus zwei Teilhebeln besteht, die über eine Ge- lenkachse gelenkig miteinander verbunden sind, auf der die einem Nocken der Nockenwelle zugeordnete Rolle drehbar gelagert ist, und mit einem zwischen den beiden Teilhebeln wirk- samen schaltbaren Verriegelungsmittel, durch das die Kraftübertragung zwischen Nockenwelle und Gaswechselventil aktiviert oder deaktiviert werden kann, wobei das freie Ende des einen Teilhebels sich auf dem Gaswechselventil abstützt und für das freie Ende des anderen Teilhebels auf dem Motorblock eine Abstützung vorgesehen ist, sowie mit einer zwischen den beiden Teilhebeln wirksamen Rückholfeder, die bei entriegel- teden Teilhebeln die Rolle an den Nocken nachführend andrückt. Dadurch, daß die Gelenkachse für die beiden Teilhebel gleichzeitig als Lagerung für die Rolle dient, ergibt sich ein erheblich vereinfachter Aufbau des Ventiltriebs. Durch diese Rückholfeder ist gewährleistet, daß bei deaktiviertem Gaswechselventil die beiden Teilhebel mit der Rolle der Nokkenkontur nachgeführt werden und so auch bei dieser Betriebs- weise die Rolle mit dem Nocken in Kontakt bleibt. Zugleich ist gewährleistet, daß nach dem Drucklossetzen der Kolben- Zylinder-Einheit die beiden Teilhebel während der Dauer des Anliegens der Rolle am Grundkreis des Nockens ihre gestreckte Stellung einnehmen und das Riegelelement in seine Aufnahme eingreifen und beide Teilelemente miteinander verriegeln kann.This object is achieved according to the invention with a piston internal combustion engine with deactivatable, mechanically operated gas exchange valves, each of which is actuated by at least one camshaft via a roller rocker arm with roller, which consists of two partial levers which are articulated to one another via an articulated axis, on which the roller assigned to a cam of the camshaft is rotatably mounted, and with a roller acting between the two partial levers same switchable locking means by which the power transmission between the camshaft and the gas exchange valve can be activated or deactivated, the free end of the one partial lever being supported on the gas exchange valve and a support being provided for the free end of the other partial lever on the engine block, and with a between the return spring, which presses the roller on the cams when the partial levers are unlocked. The fact that the hinge axis for the two partial levers simultaneously serves as a bearing for the roller results in a considerably simplified structure of the valve train. This return spring ensures that when the gas exchange valve is deactivated, the two partial levers are adjusted with the roller of the cam contour and so the roller also remains in contact with the cam in this operating mode. At the same time, it is ensured that, after the piston-cylinder unit has been depressurized, the two partial levers assume their extended position for the duration of the role of the roller on the base circle of the cam and the locking element can engage in its receptacle and can lock both partial elements together.
In besonders vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß der dem Gaswechselventil zugeordnete Teilhe- bei eine der Abstützung zugekehrte, über die Gelenkachse reichende Verlängerung aufweist, die einen Bereich des der Abstützung zugeordneten Teilhebels scherenartig überdeckt und daß das Verriegelungsmittel dem sich scherenartig überdeckenden Bereich der beiden Teilhebel zugeordnet ist.In a particularly advantageous embodiment of the invention, it is provided that the part of the gas exchange valve associated with the support has an extension, which extends over the hinge axis and covers a region of the part of the lever associated with the support, and that the locking means covers the region of the two that overlaps with the scissors Partial lever is assigned.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß das Verriegelungsmittel durch eine mit Druck- öl beaufschlagbare Kolben-Zylinder-Einheit gebildet wird, die in dem der Abstützung zugeordneten Teilhebel angeordnet ist und die ein parallel zur Gelenkachse verschiebbares Riegelelement mit einem Kolbenteil und einem Riegelteil aufweist. Der Riegelteil und der Kolbenteil können hierbei als geson- derte Bauelemente ausgebildet sein oder aber in einer vorteilhaften Ausgestaltung der Erfindung einstückig miteinander verbunden sein. Zweckmäßig ist es hierbei, wenn eine Rückstellfeder vorgesehen ist, die das Riegelelement in seiner Sperrstellung hält, so daß im Normalbetrieb die beiden Teilhebel miteinander verriegelt sind und erst durch Beaufschlagung der Kolben-Zylinder-Einheit mit Drucköl entsperrt werden und damit das entsprechende Gaswechselventil deaktiviert wird.In a further advantageous embodiment of the invention it is provided that the locking means is formed by a piston-cylinder unit which can be pressurized with oil, which is arranged in the partial lever assigned to the support and which has a locking element which can be displaced parallel to the joint axis and has a piston part and a locking part having. The locking part and the piston part can be derte components be formed or connected in one piece in an advantageous embodiment of the invention. It is useful here if a return spring is provided, which holds the locking element in its locked position, so that in normal operation the two partial levers are locked together and are only unlocked when the piston-cylinder unit is pressurized with pressure oil, thus deactivating the corresponding gas exchange valve ,
In vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß die Versorgung der Kolben-Zylinder-Einheit mit Drucköl über ein die Abstützung bildendes hydraulisches Spielausgleichselement erfolgt. Ein derartiges hydraulisches Spiel- ausgleichselement ist bei der Anordnung von Rollenschlepphebeln ohnehin vorhanden, so daß für die Druckölversorgung der Kolben-Zylinder-Einheit lediglich ein entsprechender Drucköl- kanal in dem auf dem Ausgleichselement aufliegenden Teilhebel vorzusehen ist, der mit dem Zylinder der Kolben-Zylinder-Ein- heit in Verbindung steht. Die Federkraft der Rückstellfeder der Kolben-Zylinder-Einheit ist hierbei so bemessen, daß sie bei dem für den Spielausgleich notwendigen Druckniveau und der gegebenen Kolbenfläche nicht zusammengedrückt wird, so daß die Rolle des Rollenschlepphebels immer mit dem Nocken in Kontakt steht. Soll nun ein Gaswechselventil deaktiviert werden, dann wird der Druck in der Druckölversorgung der Ausgleichselemente so weit erhöht, daß die Rückstellfeder des Riegelelementes zusammengedrückt wird und damit die Verriegelung zwischen den beiden Teilhebeln gelöst wird. Soll das be- treffende Gaswechselventil wieder aktiviert werden, dann wird der Öldruck entsprechend wieder abgesenkt, so daß über die Rückstellfeder das Riegelelement mit dem anderen Teilhebel wieder in Eingriff gebracht wird und beide Teilhebel miteinander verriegelt.In an advantageous embodiment of the invention it is provided that the supply of the piston-cylinder unit with pressure oil takes place via a hydraulic lash adjuster forming the support. Such a hydraulic lash adjuster is already present in the arrangement of roller rocker arms, so that for the pressure oil supply to the piston-cylinder unit, only a corresponding pressure oil channel is to be provided in the partial lever resting on the compensating element, which with the cylinder of the piston cylinder -Unit is connected. The spring force of the return spring of the piston-cylinder unit is dimensioned so that it is not compressed at the pressure level required for the play compensation and the given piston area, so that the role of the roller finger follower is always in contact with the cam. If a gas exchange valve is now to be deactivated, then the pressure in the pressure oil supply to the compensating elements is increased to such an extent that the return spring of the locking element is compressed and the lock between the two partial levers is released. If the gas exchange valve in question is to be reactivated, the oil pressure is reduced accordingly, so that the locking element is brought back into engagement with the other partial lever via the return spring and the two partial levers are locked together.
In vorteilhafter weiterer Ausgestaltung der Erfindung ist vorgesehen, daß zumindest der dem Gaswechselventil zugeordne- te Teilhebel klauenformig ausgebildet ist und im Bereich der Gelenkachse die Rolle übergreift, wobei ein Klauenteil die Verlängerung bildet. Diese Ausfuhrungsform bietet eine sehr stabile und platzsparende Konstruktion des Rollenschlepphebels, die zugleich eine einwandfreie Lagerung der Gelenkachse und der Rolle bietet.In an advantageous further embodiment of the invention it is provided that at least the one associated with the gas exchange valve te partial lever is claw-shaped and overlaps the roller in the area of the hinge axis, with a claw part forming the extension. This embodiment offers a very stable and space-saving construction of the roller finger follower, which at the same time offers a perfect mounting of the joint axis and the roller.
Die Erfindung wird anhand schematischer Zeichnungen eines Ausführungsbeispiels näher erläutert. Es zeigen:The invention is explained in more detail with reference to schematic drawings of an embodiment. Show it:
Fig. 1 in einer Seitenansicht ein über Nocken undFig. 1 in a side view of a cam and
Rollenschlepphebel betätigbares Gaswechselventil in aktiviertem Zustand,Roller rocker arm actuable gas exchange valve in activated state,
Fig. 2 das Gaswechselventil gem. Fig. 5 in deaktiviertem Zustand,Fig. 2 shows the gas exchange valve. 5 in the deactivated state,
Fig. 3 einen Horizontalschnitt gem. der Linie III-III durch den Rollenschlepphebel in Fig. 1 in grö- ßerem Maßstab,Fig. 3 shows a horizontal section. the line III-III through the roller rocker arm in Fig. 1 on a larger scale,
Fig. 4 im Teil-Vertikalschnitt in größerem Maßstab die Druckölversorgung des Verriegelungsmittels über einen hydraulischen Ventilausgleich,4 in partial vertical section on a larger scale, the pressure oil supply of the locking means via a hydraulic valve compensation,
Fig. 5 eine Ausfuhrungsform mit starrer Abstützung und mechanischem Spielausgleich,5 shows an embodiment with rigid support and mechanical play compensation,
Fig. 6 einen Schnitt durch den Verriegelungsbereich gem. der Linie VI-V in Fig. 5,Fig. 6 shows a section through the locking area acc. the line VI-V in Fig. 5,
Fig. 7 eine abgewandelte Ausführung der Verriegelung,7 is a modified version of the lock,
Fig. 8 einen Teil-Längsschnitt gem. der Linie VIII-VIII in Fig. 7 in Verriegelungsstellung, Fig. 9 im Teil-Längsschnitt gem. Fig. 8 die Entriegelungsstellung.Fig. 8 shows a partial longitudinal section. the line VIII-VIII in Fig. 7 in the locked position, Fig. 9 in partial longitudinal section. Fig. 8 the unlocked position.
In Fig. 1 ist ein mechanischer Nocken-Ventiltrieb zur Betäti- gung eines Gaswechselventils 1 dargestellt. Das Gaswechselventil ist an seinem Schaft 2 mit einem Federteller 3 versehen, über den es sich auf einer Ventilfeder 4 abstützt und von dieser in Schließstellung gehalten wird.1 shows a mechanical cam valve train for actuating a gas exchange valve 1. The gas exchange valve is provided on its shaft 2 with a spring plate 3, by means of which it is supported on a valve spring 4 and is held by the latter in the closed position.
Zur Betätigung des Gaswechselventils 1 ist ein Rollenschlepphebel 5 vorgesehen, der im wesentlichen durch einen Teilhebel 5.1 und einen Teilhebel 5.2 gebildet wird. Die beiden Teilhebel 5.1 und 5.2 sind über eine Gelenkachse 6 gelenkig miteinander verbunden, auf der eine Rolle 7 frei drehbar gelagert ist, die am Nocken 8 der zugehörigen Nockenwelle anliegt.To actuate the gas exchange valve 1, a roller rocker arm 5 is provided, which is essentially formed by a partial lever 5.1 and a partial lever 5.2. The two partial levers 5.1 and 5.2 are connected to one another in an articulated manner via an articulated axis 6, on which a roller 7 is freely rotatably supported, which abuts the cam 8 of the associated camshaft.
Der Rollenschlepphebel 5 stützt sich mit seinem, dem Teilhebel 5.1 zugeordneten freien Ende auf dem Ventilschaft 2 ab. Mit seinem, dem Teilhebel 5.2 zugeordneten freien Ende stützt sich der Rollenschlepphebel 5 über eine Kalotte auf dem beweglichen Teil 9 eines hydraulischen Spielausgleichselementes 10 bekannter Bauart ab, das mit dem Motorblock 11 fest verbunden ist und über eine entsprechende Kanalanordnung 12 im Motorblock mit einer Druckölversorgung in Verbindung steht.The roller rocker arm 5 is supported with its free end assigned to the partial lever 5.1 on the valve stem 2. With its free end assigned to the partial lever 5.2, the roller rocker arm 5 is supported by a calotte on the movable part 9 of a hydraulic lash adjuster 10 of a known type, which is firmly connected to the engine block 11 and via a corresponding channel arrangement 12 in the engine block with a pressurized oil supply in Connection is established.
Zwischen den beiden Teilhebeln 5.1 und 5.2 ist ein schaltbares Verriegelungsmittel 13 vorgesehen, das nachstehend in seinem Aufbau und in seiner Funktionsweise noch näher erläutert werden wird. In der gezeigten Verriegelungsstellung bil- den die beiden Teilhebel 5.1 und 5.2 ein starre Einheit, so daß bei Drehung des Nockens 8 das Gaswechselventil entsprechend der Hubhöhe des Nockens 8 geöffnet und geschlossen wird.A switchable locking means 13 is provided between the two partial levers 5.1 and 5.2, the structure and mode of operation of which will be explained in more detail below. In the locking position shown, the two partial levers 5.1 and 5.2 form a rigid unit, so that when the cam 8 rotates, the gas exchange valve is opened and closed in accordance with the lifting height of the cam 8.
Soll nun das betreffende Gaswechselventil deaktiviert werden, wird das Verriegelungsmittel 13 betätigt und die Verriegelung zwischen den beiden Teilhebeln 5.1 und 5.2 aufgehoben, so daß der Rollenschlepphebel im Bereich der Rolle 7 "einknickt" und keine Kraftübertragung auf das Gaswechselventil erfolgen kann, wie dies in Fig. 2 dargestellt ist. Eine zwischen den beiden Teilhebeln 5.1 und 5.2 angeordnete, hier nur schema- tisch als Schraubendruckfeder angedeutete Rückholfeder 14 sorgt dafür, daß die beiden Teilhebel um die Gelenkachse 6 auseinandergedrückt werden und so die Rolle 7 bei einer Entriegelung der beiden Teilhebel mit der Steuerkontur des Nokkens 8 weiter in Kontakt bleibt und auf dieser nachgeführt wird. Bei deaktiviertem Rollenschlepphebel können die beiden Teilhebel sowohl um die Gelenkachse 6 als auch um ihre Auflagen am Ende 2.1 des Ventilschaftes einerseits und an der Abstützung, hier dem beweglichen Teil 9 des hydraulischen Ausgleichselementes andererseits schwingen.If the relevant gas exchange valve is now to be deactivated, the locking means 13 is actuated and the locking between the two partial levers 5.1 and 5.2 is released, so that the roller rocker arm "kinks" in the area of the roller 7 and no force transmission can take place to the gas exchange valve, as shown in FIG. 2. A return spring 14 arranged between the two partial levers 5.1 and 5.2, shown here only schematically as a helical compression spring, ensures that the two partial levers are pressed apart about the articulation axis 6 and thus the roller 7 when the two partial levers are unlocked with the control contour of the cam 8 remains in contact and is tracked on this. When the roller cam follower is deactivated, the two partial levers can swing both about the articulation axis 6 and about their supports at the end 2.1 of the valve stem on the one hand and on the support, here the movable part 9 of the hydraulic compensating element on the other hand.
Sollen die beiden Teilhebel 5.1 und 5.2 wieder miteinander verriegelt werden, dann wird, wie nachstehend noch näher erläutert werden wird, das Verriegelungsmittel entsprechend drucklos gesetzt, so daß über eine vorhandene Rückstellfeder das Verriegelungsmittel in der Phase wieder in Eingriff gelangen kann, wenn die Rolle 7 am Bereich 8.1 des Grundkreisbereichs 8.1 des Nockens 8 anliegt.If the two partial levers 5.1 and 5.2 are to be locked together again, then, as will be explained in more detail below, the locking means is correspondingly depressurized, so that the locking means can come into engagement again in the phase when the roller 7th is present via an existing return spring rests on area 8.1 of base circle area 8.1 of cam 8.
In Fig. 3 ist in einem Horizontalschnitt in größerem Maßstab der Rollenschlepphebel 5 dargestellt. Die Teilhebel 5.1 und 5.2 sind bei dieser Ausfuhrungsform klauenartig ausgebildet und umgreift die Gelenkachse 6 und die Rolle 7. Eine Verlängerung 5.3 am Teilhebel 5.1 überdeckt hierbei seitlich den Teilhebel 5.2, so daß sich die beiden Teilhebel in entriegel- tem Zustand um die Gelenkachse scherenartig relativ zueinander verschwenken können.In Fig. 3, the roller rocker arm 5 is shown in a horizontal section on a larger scale. In this embodiment, the partial levers 5.1 and 5.2 are claw-like and encompasses the articulated axis 6 and the roller 7. An extension 5.3 on the partial lever 5.1 covers the partial lever 5.2 laterally, so that the two partial levers are relatively scissors-like in the unlocked state can pivot to each other.
Im Teilhebel 5.2 ist das Verriegelungsmittel 13 gelagert. Bei dem hier dargestellten Ausführungsbeispiel besteht dies aus einem Zylinder 15, in dem ein Kolbenteil 16 verschiebbar gelagert ist. In einer entsprechenden Ausnehmung 17 in der Ver- längerung 5.3 des Teilhebels 5.1 ist ein Riegelteil 18 gegen die Kraft einer Rückstellfeder 19 verschiebbar gelagert.The locking means 13 is mounted in the partial lever 5.2. In the embodiment shown here, this consists of a cylinder 15 in which a piston part 16 is slidably mounted. In a corresponding recess 17 in the Extension 5.3 of the partial lever 5.1, a locking part 18 is slidably mounted against the force of a return spring 19.
Der Zylinder 15 steht über einen Zuleitungskanal 20 mit einer Druckölversorgung in Verbindung. Wird der Zylinder 15 durch Drucköl mit entsprechend hohem Druck beaufschlagt, dann schiebt der Kolbenteil 16 den Riegelteil 18 gegen die Kraft der Rückstellfeder 19 bis zum Anschlag in seine Ausnehmung 17 zurück. Der Riegelteil 18 ist hierbei in seiner Länge so be- messen, daß er in entriegeltem Zustand, wie hier dargestellt, die scherenartige Relativbewegung der beiden Teilhebel 5.1 und 5.2 ermöglicht, wobei die Stirnflächen des Riegelteils 18 einerseits und des Kolbenteils 16 andererseits aufeinander- gleiten.The cylinder 15 is connected to a pressure oil supply via a supply duct 20. If the cylinder 15 is pressurized by a correspondingly high pressure oil, then the piston part 16 pushes the locking part 18 against the force of the return spring 19 as far as it will go into its recess 17. The length of the locking part 18 is such that, in the unlocked state, as shown here, it enables the scissors-like relative movement of the two partial levers 5.1 and 5.2, the end faces of the locking part 18 on the one hand and the piston part 16 sliding on the other.
Wird der Zylinder 15 drucklos gesetzt, dann schiebt während der Abrollzeit der Rolle 7 auf dem Grundkreis 8.1 des Nockens die Rückstellfeder 19 den Riegelteil 18 sowie den Kolbenteil 16 in den Zylinder 15 zurück, wobei der Riegelteil 18 in den dann frei werdenden Teil des Zylinders 15 eingreift und die beiden Teilhebel 5.1 und 5.2 fest miteinander verriegelt. Die Rückstellkraft muß ausreichend groß sein, um den des Riegelelements sehr schnell zurückzuschieben.If the cylinder 15 is depressurized, the return spring 19 pushes the locking part 18 and the piston part 16 back into the cylinder 15 during the rolling time of the roller 7 on the base circle 8.1 of the cam, the locking part 18 in the part of the cylinder 15 that is then released engages and the two partial levers 5.1 and 5.2 are locked together. The restoring force must be large enough to push back that of the locking element very quickly.
Das Verriegelungselement kann in der Weise abgewandelt werden, daß das Riegelelement zugleich als Kolben wirkt. Hierzu ist es erforderlich, die Richtung der Kraftwirkung der Rückstellfeder und des Öldrucks zu ändern sowie den Kolben entsprechend anders auszubilden. Eine im Zylinder 15 angeordnete Rückstellfeder drückt den Kolben bei drucklosem Zustand bzw. bei geringem Öldruck in die Ausnehmung 17 und verriegelt die beiden Teilhebel gegeneinander. Wird dann der als Kolben ausgebildete Teil des Riegelelementes in Gegenrichtung zur Kraftwirkung dieser Feder mit Druck beaufschlagt, wird er in den Zylinder 15 zurückgedrückt und der mit dem Kolben fest verbundene riegelnde Teil wird aus der Ausnehmung 17 heraus- gezogen und gibt den Teilhebel 5.1 gegenüber dem Teilhebel 5.2 frei.The locking element can be modified in such a way that the locking element also acts as a piston. For this it is necessary to change the direction of the force of the return spring and the oil pressure and to design the piston differently accordingly. A return spring arranged in the cylinder 15 presses the piston into the recess 17 in the depressurized state or at low oil pressure and locks the two partial levers against one another. If the part of the locking element designed as a piston is then pressurized in the opposite direction to the force of this spring, it is pushed back into the cylinder 15 and the locking part firmly connected to the piston is removed from the recess 17. pulled and releases the partial lever 5.1 compared to the partial lever 5.2.
In Fig. 4 ist in einem vertikalen Teilschnitt im größeren Maßstab die Abstützung des Teilhebels 5.2 auf dem Spielausgleichselement 10 im Schnitt dargestellt. Das Spielausgleichselement 10 besteht im wesentlichen aus einem Zylinderteil 10.1, in dem das hohl ausgebildete Stützteil 9 kolbenartig geführt ist. Über die Zuleitung 12 wird der Innenraum des beweglichen Teils 9 mit Drucköl mit einem vorgegebenen geringen Druck beaufschlagt, so daß in jeder Temperaturläge eine Anlage der Rolle 7 am Nocken 8 und eine Auflage des freien Endes des Teilhebels 5.1 auf dem Ende bei Punkt 1 des Ventilschafts 2 gewährleistet ist. Im Bereich der Abstützung des freien Endes des Teilhebels 5.2 auf dem Teilelement 9 weist das Teilelement 9 eine Durchgangsbohrung 21 auf, die mit dem Zuleitungskanal 20 in Verbindung steht und die, wie in Fig. 3 dargestellt, in den Zylinder 15 ausmündet. Soll nun, wie vorstehend beschrieben, das Gaswechselventil deaktiviert werden, dann wird das Spielausgleichselement 10 mit einem entsprechend erhöhten Druck beaufschlagt, der so groß ist, daß die Rückstellfeder 17 der Bauart gemäß Fig. 3 zusammengedrückt und der Riegelteil 18 vollständig in seine Aufnahme 17 in der Verlängerung 5.3 des Teilhebels 5.1 eingeschoben wird und so die beiden Teilhebel außer Eingriff gebracht werden.In Fig. 4, the support of the partial lever 5.2 on the play compensation element 10 is shown in section in a vertical partial section on a larger scale. The play compensation element 10 consists essentially of a cylinder part 10.1, in which the hollow support part 9 is guided like a piston. Via the supply line 12, the interior of the movable part 9 is pressurized with a predetermined low pressure oil, so that in each temperature position the roller 7 rests against the cam 8 and the free end of the partial lever 5.1 rests on the end at point 1 of the valve stem 2 is guaranteed. In the area of the support of the free end of the partial lever 5.2 on the partial element 9, the partial element 9 has a through hole 21 which is connected to the feed channel 20 and which, as shown in FIG. 3, opens into the cylinder 15. If, as described above, the gas exchange valve is now to be deactivated, then the play compensation element 10 is subjected to a correspondingly increased pressure which is so great that the return spring 17 of the type according to FIG. 3 is compressed and the locking part 18 is completely in its receptacle 17 in the extension 5.3 of the partial lever 5.1 is inserted and so the two partial levers are disengaged.
Bei der anderen vorstehend beschriebenen Bauform wird durch die erhöhte Druckbeaufschlagung der mit einem Ansatz als Riegelteil versehene Kolben 16 in den Zylinder 15 gegen die Kraft einer Rückstellfeder zurückgeschoben und damit der mit dem Kolben 16 verbundene Ansatz aus der Ausnehmung 17 zurückgezogen.In the other design described above, due to the increased pressurization, the piston 16, which is provided with an attachment as a locking part, is pushed back into the cylinder 15 against the force of a return spring, and the attachment connected to the piston 16 is thus withdrawn from the recess 17.
In Fig. 5 ist eine Abwandlung der Ausfuhrungsform gem. Fig. 1 dargestellt. Der Rollenschlepphebel 5 ist bei dieser Ausführungsform über einen Stützbolzen 10.1 fest auf dem Motorblock abgestützt. Der Stützbolzen 10.1 ist mit einem Strömungskanal 11.1 versehen, der mit der Kanalanordnung 12 der Druckölversorgung in Verbindung steht. Die Abstützung des Rollenschlepphebels 5 und die Beaufschlagung des Verriegelungsmittels 13 erfolgt wie bei der vorstehend beschriebenen Ausfüh- rungsform gem. Fig. 1 ff. Aufbau und Funktion sind insoweit identisch, so daß auf die vorstehende Beschreibung bezug genommen wird, wobei gleiche Bauteile mit gleichen Bezugszeichen versehen sind.5 is a modification of the embodiment according to. Fig. 1 shown. In this embodiment, the roller rocker arm 5 is firmly supported on the engine block via a support bolt 10.1. The support bolt 10.1 is with a flow channel 11.1 provided, which is connected to the channel arrangement 12 of the pressure oil supply. The roller finger follower 5 is supported and the locking means 13 is acted upon as in the embodiment described above in accordance with FIG. 1 ff. Structure and function are so far identical, so that reference is made to the above description, the same components being provided with the same reference numerals.
Die Anordnung der Rückstellfeder 14 ermöglicht den Verzicht auf ein hydraulisches Ventilspielausgleichselement und damit die Realisierung eines Ventiltriebs mit mechanischen Spiels ohne Verwendung einer Schlepphebelachse. Durch die Anordnung der Rückstellfeder 14 ist es möglich, daß auch bei gegenein- ander verriegelten Teilhebeln sowohl im Grundkreis als auch im Bereich der Nockenrampe ein Kontaktschluß zwischen der Rolle 7 und dem Nocken erhalten bleibt. Um dies zu erreichen, ist der Endbereich des Zylinders 15 mit einer nutförmigen Verlängerung 15.1 versehen, die sich in Richtung der Schwenk- bewegung der beiden Teilheben 5.1 und 5,2 erstreckt. Fig. 6 Zeigt diese Anordnung in einem Schnitt gem. der Linie VI-VI in Fig. 5, wobei die Anordnung in verriegelter Stellung gezeigt ist. Der Riegelteil 18 greift in die nutförmige Erweiterung 15.1 ein und wird über die Rückstellfeder 19, wie zu Fig. 3 beschrieben, in Verriegelungsposition gehalten. Aufgrund der nutartigen Verlängerung 15.1, deren Länge in etwa der Größe des zu erwartenden Ventilspiels entspricht, ist es möglich, daß die beiden Teilhebel 5.1 und 5.2 in Richtung der Pfeile 21 und 22 sich relativ zueinander verschieben können. Durch die Rückholfeder 14 ist dafür Sorge getragen, daß die Rolle 7 immer an der Steuerkontur 8.1 des Nockens 8 anliegt. Gleichwohl thermische oder durch Verschleiß bedingte Längenänderungen des Ventilschaftes ausgeglichen werden, so daß das Ventil von seiner Ventilfeder zuverlässig in der Schließstel- lung gehalten wird, solange die Rolle 7 auf dem Grundkreisbereich 8.1 des Nockens 8 abrollt. Sobald dann die Rolle 7 auf die Nockenkontur aufläuft, gelangt der Reigelteil 18 am Ende der nutförmigen Verlängerung 15.1 zur Anlage, so daß über den Nocken das Ventil gegen die Kraft der Ventilfeder 4 geöffnet werden kann.The arrangement of the return spring 14 makes it possible to dispense with a hydraulic valve play compensation element and thus to implement a valve train with mechanical play without using a rocker arm axis. The arrangement of the return spring 14 makes it possible for a contact closure between the roller 7 and the cam to be maintained both in the base circle and in the area of the cam ramp, even when the partial levers are locked against one another. In order to achieve this, the end region of the cylinder 15 is provided with a groove-shaped extension 15.1, which extends in the direction of the pivoting movement of the two partial lifts 5.1 and 5.2. Fig. 6 shows this arrangement in a section acc. the line VI-VI in Fig. 5, the arrangement being shown in the locked position. The locking part 18 engages in the groove-shaped extension 15.1 and is held in the locking position via the return spring 19, as described for FIG. 3. Due to the groove-like extension 15.1, the length of which approximately corresponds to the size of the valve clearance to be expected, it is possible that the two partial levers 5.1 and 5.2 can move relative to one another in the direction of the arrows 21 and 22. The return spring 14 ensures that the roller 7 always bears against the control contour 8.1 of the cam 8. Nonetheless, thermal or wear-related changes in length of the valve stem are compensated for, so that the valve is held reliably in the closed position by its valve spring as long as the roller 7 rolls on the base circle area 8.1 of the cam 8. As soon as the roller 7 runs onto the cam contour, the locking part 18 arrives at the end the groove-shaped extension 15.1 to the system so that the valve can be opened against the force of the valve spring 4 via the cams.
Soll das betreffende Ventil deaktiviert werden, wird der Kolben 16, wie vorstehend anhand von Fig. 3 beschrieben, über den Öldruck gegen die Kraft der Rückstellfeder 19 vorgeschoben, so daß die Verriegelung zwischen den beiden Teilhebeln 5.1 und 5.2 aufgehoben wird.If the valve in question is to be deactivated, the piston 16, as described above with reference to FIG. 3, is advanced via the oil pressure against the force of the return spring 19, so that the locking between the two partial levers 5.1 and 5.2 is released.
In Fig. 7 ist eine gegenüber Fig. 3 abgewandelte Ausführungsform des Verriegelungsmittels 13 dargestellt. Die Abwandlung besteht im wesentlichen darin, daß der Riegelteil 18.1 einstückig mit dem Kolbenteil 16.1 über einen Stegteil 16.2 ver- bunden ist. Der Teilhebel 5.1 weist an seinem dem Verriegelungselement 13 zugekehrten Ende eine Riegelnase 5.4 auf, die in ihrer Breite so bemessen ist, daß sie in der in Fig. 7 gezeigten Entriegelungsstellung, der Zylinder 15 ist mit Drucköl beaufschlagt, durch den Freiraum zwischen dem Kolbenteil 16.1 und dem Riegelteil 18.1 hindurchschwenken kann. Wir der Zylinder 15 drucklos gesetzt, drückt die Rückstellfeder 19 den Riegelteil 18.1 zusammen mit dem Kolben in den Zylinder 15 zurück, so daß der Riegelteil 18.1 die Verriegelungsnase 5.4 untergreifen kann, sobald die Rolle 7 den Grundkreisbe- reich 8.1 im Nocken 8 durchläuft.FIG. 7 shows an embodiment of the locking means 13 which is modified compared to FIG. 3. The modification essentially consists in that the locking part 18.1 is integrally connected to the piston part 16.1 via a web part 16.2. The partial lever 5.1 has at its end facing the locking element 13 a locking lug 5.4, the width of which is dimensioned such that in the unlocking position shown in FIG. 7, the cylinder 15 is pressurized with oil, through the space between the piston part 16.1 and can pivot the locking part 18.1. If the cylinder 15 is depressurized, the return spring 19 presses the locking part 18.1 together with the piston back into the cylinder 15, so that the locking part 18.1 can engage under the locking nose 5.4 as soon as the roller 7 passes through the base circle area 8.1 in the cam 8.
In Fig. 8 ist in einer Schnittdarstellung die Anordnung in verriegelter Stellung dargestellt. Fig. 8 läßt erkennen, wie in der verriegelten Stellung die Riegelnase 5.4 sich auf dem Riegelteil 18.1 abstützt. Es ist ohne weiteres zu erkennen, daß bei einem Verschieben des Riegelteils 18.1 in die in Fig. 7 dargestellte Position die Riegelnase 5.4 freigegeben wird und die beiden Teilhebel 5.1 und 5.2 in Richtung der beiden Pfeile nach unten gegeneinander verschwenken können, wie dies in Fig. 9 dargestellt ist. Die Rückstellfeder ist hier zur Vereinfachung der Zeichnung nicht dargestellt. In Fig. 8, the arrangement in the locked position is shown in a sectional view. Fig. 8 shows how in the locked position the locking lug 5.4 is supported on the locking part 18.1. It can easily be seen that when the locking part 18.1 is moved into the position shown in FIG. 7, the locking nose 5.4 is released and the two partial levers 5.1 and 5.2 can pivot downwards in the direction of the two arrows, as shown in FIG. 9 is shown. The return spring is not shown here to simplify the drawing.

Claims

Ansprüche Expectations
1. Kolbenbrennkraftmaschine mit deaktivierbaren, mechanisch betätigten Gaswechselventilen, die jeweils durch wenigstens eine Nockenwelle über einen Rollenschlepphebel (5)mit Rolle (7) betätigt werden, der aus zwei Teilhebeln (5.1, 5.2) besteht, die über eine Gelenkachse (6) gelenkig miteinander verbunden sind, auf der die einem Nocken (8) der Nockenwelle zugeordnete Rolle (7) drehbar gelagert ist, und mit einem zwischen den beiden Teilhebeln (5.1, 5.2) wirksamen schaltbaren Verriegelungsmittel (13), durch das die Kraftübertragung zwischen Nockenwelle und Gaswechselventil aktiviert oder deaktiviert werden kann, wobei das freie Ende des einen Teilhebels (5.1) sich auf dem Gaswechselventil (2) abstützt und für das freie Ende des anderen Teilhebels auf dem Motorblock eine Abstützung vorgesehen ist, sowie mit einer zwischen den beiden Teilhebeln (5.1, 5.2) wirksamen Rückholfeder (14), die bei entriegelten Teilhebeln die Rolle (7) an den Nocken nachführend andrückt.1. Piston internal combustion engine with deactivatable, mechanically operated gas exchange valves, each of which is actuated by at least one camshaft via a roller rocker arm (5) with roller (7), which consists of two partial levers (5.1, 5.2) which are articulated with one another via an articulated axis (6) are connected, on which the roller (7) assigned to a cam (8) of the camshaft is rotatably mounted, and to a switchable locking means (13) which is effective between the two partial levers (5.1, 5.2) and which activates the power transmission between the camshaft and the gas exchange valve or can be deactivated, the free end of one partial lever (5.1) being supported on the gas exchange valve (2) and a support being provided for the free end of the other partial lever on the engine block, and with one between the two partial levers (5.1, 5.2 ) effective return spring (14), which presses the roller (7) to the cam when the partial levers are unlocked.
2. Kolbenbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der dem Gaswechselventil (2) zugeordnete Teilhebel (5.1) eine der Abstützung zugekehrte, über die Gelenkachse (6) reichende Verlängerung (5.3) aufweist, die einen Bereich des der Abstützung zugeordneten Teilhebels (5.2) scherenartig überdeckt, und daß das Verriegelungsmittel (13) dem sich scherenartig überdeckenden Bereich der beiden Teilhebel (5.1, 5.2) zugeordnet ist.2. Piston internal combustion engine according to claim 1, characterized in that the gas exchange valve (2) associated partial lever (5.1) has a support facing, over the hinge axis (6) extending extension (5.3) which has a region of the support lever associated with the part (5.2 ) covered like scissors, and that the locking means (13) is assigned to the area of the two partial levers (5.1, 5.2) that overlaps like scissors.
3. Kolbenbrennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Verriegelungsmittel (13) durch einen mit Drucköl beaufschlagbare Kolben-Zylinder-Einheit gebildet wird, die in dem der Abstützung zugeordneten Teilhebel (5.2) angeordnet ist und die ein parallel zur Gelenkachse ( 6 ) ver- schiebbares Riegelelement mit einem Kolbenteil (16) und einem Riegelteil (18) aufweist. 3. Piston internal combustion engine according to claim 1 or 2, characterized in that the locking means (13) is formed by a piston-cylinder unit which can be pressurized with pressure oil, which is arranged in the support arm associated with the support (5.2) and which is parallel to the hinge axis ( 6) has a displaceable locking element with a piston part (16) and a locking part (18).
4. Kolbenbrennkaftmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Riegelteil durch einen Sperrkörper (18) gebildet wird, der in dem dem Gaswechselventil zugeordneten Teilhebel (5.1) in einer Ausnehmnung (17) ver- schiebbar gelagert ist und sich einenends auf einer Rückstellfeder (19) und anderenends auf dem Kolben (16) abstützt.4. Piston burning machine according to one of claims 1 to 3, characterized in that the locking part is formed by a locking body (18) which is displaceably mounted in the recessed lever (5.1) associated with the gas exchange valve in a recess (17) and one end supported on a return spring (19) and at the other end on the piston (16).
5. Kolbenbrennkraftmaschine nach einem der Ansprüche 1 bis 4 , dadurch gekennzeichnet, daß die Versorgung der Kolben- Zylinder-Einheit (15, 16) mit Drucköl über einen die Abstützung bildendes Spielausgleichselement (10) erfolgt.5. Piston internal combustion engine according to one of claims 1 to 4, characterized in that the supply of the piston-cylinder unit (15, 16) with pressure oil takes place via a backlash element (10) forming the support.
6. Kolbenbrennkraftmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zumindest der dem Gaswechselven- til (2) zugeordnete Teilhebel (5.1) klauenformig ausgebildet ist und im Bereich der Gelenkachse (6) die Rolle (7) übergreift, wobei ein Klauenteil (5.3) eine Verlängerung bildet. 6. Piston internal combustion engine according to one of claims 1 to 5, characterized in that at least the gas lever (2) associated partial lever (5.1) is claw-shaped and in the region of the hinge axis (6) overlaps the roller (7), a claw part (5.3) forms an extension.
EP01969516A 2000-08-09 2001-07-26 Piston engine comprising deactivatable mechanically actuated gas exchange valves Expired - Lifetime EP1307637B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10038917 2000-08-09
DE10038917A DE10038917A1 (en) 2000-08-09 2000-08-09 Piston engine with deactivable, mechanically actuated gas exchange valves
PCT/EP2001/008624 WO2002012685A1 (en) 2000-08-09 2001-07-26 Piston engine comprising deactivatable mechanically actuated gas exchange valves

Publications (2)

Publication Number Publication Date
EP1307637A1 true EP1307637A1 (en) 2003-05-07
EP1307637B1 EP1307637B1 (en) 2006-03-01

Family

ID=7651888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969516A Expired - Lifetime EP1307637B1 (en) 2000-08-09 2001-07-26 Piston engine comprising deactivatable mechanically actuated gas exchange valves

Country Status (5)

Country Link
US (1) US6655331B2 (en)
EP (1) EP1307637B1 (en)
AT (1) ATE318996T1 (en)
DE (2) DE10038917A1 (en)
WO (1) WO2002012685A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10156646A1 (en) * 2001-11-17 2003-05-28 Volkswagen Ag Valve drive for internal combustion engines has oil duct formed in blind hole bottom of guide bore of support element which acts as play compensating element
JP4026410B2 (en) * 2002-05-24 2007-12-26 三菱自動車工業株式会社 Valve operating device for internal combustion engine
DE10226821A1 (en) 2002-06-15 2003-12-24 Ina Schaeffler Kg Rocker arm of a valve train of an internal combustion engine
DE10226822A1 (en) * 2002-06-15 2004-01-08 Ina-Schaeffler Kg Motor vehicle internal combustion engine valve rocker has outer arm with relatively pivotable inner arm to adjust valve timing
DE102004005594A1 (en) 2004-02-04 2005-08-25 Fev Motorentechnik Gmbh Cam follower for stroke changeover
DE102005006954A1 (en) * 2005-02-16 2006-08-17 Schaeffler Kg Switchable drag lever of a valve train of an internal combustion engine
DE102005031241A1 (en) * 2005-07-01 2007-01-04 Fev Motorentechnik Gmbh Variable valve train of a piston internal combustion engine
DE102006033403A1 (en) * 2006-07-19 2008-01-24 Mahle International Gmbh cam drive
JP5110690B2 (en) 2006-12-15 2012-12-26 現代自動車株式会社 Rocker arm device for cylinder deactivation
CN101225759B (en) * 2008-01-25 2010-06-09 许小法 Variable spiracula lifting device
DE102008034092A1 (en) 2008-07-21 2010-01-28 Fev Motorentechnik Gmbh Shifting valve lever for valve drive, has valve shifting function and two partial levers flexibly connected around pivot pin, where shifting blocking unit is operated between partial levers, and return spring is provided as coil spring
DE102008034090A1 (en) 2008-07-21 2010-01-28 Fev Motorentechnik Gmbh Switchable valve lever for valve trains of internal combustion engine, has C-shaped bracket with ends fixed at partial levers in force-fit and form-fit manners, where bracket is elastically deformed during pivoting of levers
DE102014205813A1 (en) * 2014-03-28 2015-10-01 Aktiebolaget Skf Valve control and method for valve control
CN107060936A (en) * 2017-02-10 2017-08-18 中国第汽车股份有限公司 A kind of engine Bi Gang mechanisms
US10605126B2 (en) * 2018-04-17 2020-03-31 Delphi Technologies Ip Limited Switchable rocker arm
US11208921B2 (en) * 2018-12-06 2021-12-28 Jacobs Vehicle Systems, Inc. Finger follower for lobe switching and single source lost motion
CN113167144B (en) * 2018-12-06 2023-01-24 雅各布斯车辆系统公司 Finger follower for lobe switching and single source lost motion
US11300014B2 (en) * 2018-12-06 2022-04-12 Jacobs Vehicle Systems, Inc. Valve actuation system comprising finger follower for lobe switching and single source lost motion

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH027204Y2 (en) * 1984-12-25 1990-02-21
US4768467A (en) * 1986-01-23 1988-09-06 Fuji Jukogyo Kabushiki Kaisha Valve operating system for an automotive engine
US5022360A (en) * 1990-10-15 1991-06-11 Chrysler Corporation Valve actuator for overhead camshaft engine
JP3268847B2 (en) * 1992-09-19 2002-03-25 マツダ株式会社 Engine valve drive
US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
US5660153A (en) * 1995-03-28 1997-08-26 Eaton Corporation Valve control system
US5657726A (en) * 1996-01-16 1997-08-19 Ford Global Technologies, Inc. Rocker arm assembly for an internal combustion engine
US5653198A (en) * 1996-01-16 1997-08-05 Ford Motor Company Finger follower rocker arm system
GB2322410B (en) * 1997-02-21 2000-06-14 T & N Technology Ltd Valve operating mechanisms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0212685A1 *

Also Published As

Publication number Publication date
WO2002012685A1 (en) 2002-02-14
EP1307637B1 (en) 2006-03-01
ATE318996T1 (en) 2006-03-15
US20030159669A1 (en) 2003-08-28
DE10038917A1 (en) 2002-02-21
DE50109098D1 (en) 2006-04-27
US6655331B2 (en) 2003-12-02

Similar Documents

Publication Publication Date Title
EP1307637B1 (en) Piston engine comprising deactivatable mechanically actuated gas exchange valves
EP3170997B1 (en) Variable valve drive with a rocker arm
DE60304621T2 (en) Rocker arm for two-stage cam operation
EP2126292B1 (en) Valve drive for gas exchange valves of an internal combustion engine, comprising an axially movable bearing
AT510529B1 (en) FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE
EP1915517A1 (en) Switchable cam follower of a valve train of an internal combustion engine
DE4322480A1 (en) Device for variable valve control of internal combustion engines with valve shutdown
EP0712462B1 (en) Rocker assembly with interconnectable arms
EP0285877B1 (en) Valve control device
DE102007010150A1 (en) Valve drive for gas exchange valves has locking device fixed in position in housing of internal combustion engine
DE4212844A1 (en) Valve actuation mechanism for an internal combustion engine
DE102007010155A1 (en) Camshaft for IC engine has two cam followers plus a circular cam which slides axially into the cam bearing for the non operating valve setting
DE19700736B4 (en) Valve gear of an internal combustion engine
EP0733783B1 (en) Rocker assembly for actuating a valve
DE4226163A1 (en) Engine valve shutdown by means of cam roller displacement
EP1205643A1 (en) Valve drive in an internal combustion engine
DE19630309C2 (en) Device for interrupting the flow of power between a camshaft and at least one valve
DE69200235T2 (en) Hydraulic control device for amplitude-variable lifting mechanisms with at least one internal combustion engine valve.
DE4136143A1 (en) Valve control mechanism for IC engine - has combination of two rocker arms which can be positively joined by locking lever
DE19720900B4 (en) Internal combustion engine with a valve drive for globe valves
DE19637066A1 (en) Valve operating device with stop function
DE2339480C2 (en) Device for breaking the non-positive connection between a rotating cam and a cam follower resting against it
DE102020117726A1 (en) Variable valve train device
DE102004033963A1 (en) Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve
DE102020123529A1 (en) rocker arm device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030214

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060301

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50109098

Country of ref document: DE

Date of ref document: 20060427

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060601

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060801

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20060301

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20061204

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060726

BERE Be: lapsed

Owner name: FEV MOTORENTECHNIK G.M.B.H.

Effective date: 20060731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060602

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060726

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060301

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAXTON LANGMAACK & PARTNER, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAXTON LANGMAACK & PARTNER, DE

Effective date: 20120509

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: VON KREISLER SELTING WERNER - PARTNERSCHAFT VO, DE

Effective date: 20120509

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: DOMPATENT VON KREISLER SELTING WERNER - PARTNE, DE

Effective date: 20120509

Ref country code: DE

Ref legal event code: R081

Ref document number: 50109098

Country of ref document: DE

Owner name: FEV GMBH, DE

Free format text: FORMER OWNER: FEV MOTORENTECHNIK GMBH, 52078 AACHEN, DE

Effective date: 20120509

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: VON KREISLER SELTING WERNER - PARTNERSCHAFT VO, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

Representative=s name: DOMPATENT VON KREISLER SELTING WERNER - PARTNE, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50109098

Country of ref document: DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20160731

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50109098

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180201