EP2002530A1

EP2002530A1 - Segmented drive for valve driving

Info

Publication number: EP2002530A1
Application number: EP07711593A
Authority: EP
Inventors: Thomas Leiber; Heinz Leiber; Valentin Unterfrauner; Jochen Keller
Original assignee: LSP Innovative Automotive Systems GmbH
Current assignee: LSP Innovative Automotive Systems GmbH
Priority date: 2006-03-20
Filing date: 2007-02-20
Publication date: 2008-12-17
Also published as: DE102006013100A1; WO2007107218A1

Abstract

The invention relates to a segmented drive, having a rotor (1) bearing a plurality of permanent magnets (2), wherein the permanent magnets (2) are arranged in a first subregion of the circumference of the rotor, and a bearing (5) for valve coupling is arranged in a second subregion, in which no permanent magnets are arranged, wherein the first subregion of the rotor (1) is at least partially surrounded by an outer stator (7, 8), and an inner stator (9) is arranged within the rotor (1), wherein the inner stator and the outer stator are fixed or integrated on the housing of the segmented motor, wherein at least two rotors (1) with associated outer and inner stators are arranged in the housing of the drive, wherein a housing intermediate part (12, 34a) is arranged between two rotors (1), and the rotors (1) are mounted on the housing intermediate part (12, 34a) or on a shaft (Ia, 35) positioned in the housing intermediate part (12, 34a).

Description

- IL ¬

I O

Title: Segment drive for valve train

The present invention relates to a segmented motor having the features of the preamble of claim 1.

State of the art

Are known a variety of actuators for actuating gas exchange valves of internal combustion engines. Most patents describe designs of actuators based on the resonant oscillator principle.

Linear actuators, which are similar to those described in DE 19825728, are known. These consist of two electromagnets. Between the electromagnets is the magnetic anchor, which moves between the pole faces of the two electromagnets. The armature is in connection with the valve of an internal combustion engine and is accelerated by two springs. nigt. Lever actuators, also based on the resonant oscillating principle according to DE 19712063 and DE 19854020 are known. The actuators operate on the same physical operating principle with the difference that the valve is not actuated directly, but via a lever and the lever between the pole faces of two magnets emotional.

The disadvantage of the above actuators is that, in principle, the valve lift can not be adjusted as desired. As a rule, with o.g. Actuators are adjusted only small pitch and a large stroke. In addition, the dynamics of the actuators described above are determined by the springs and can not be varied. These possibilities of the actuators is not sufficient for the implementation of novel combustion methods. These require full variability of the valve lift and very accurate timing accuracy.

These requirements can in principle be met with a drive as described in PCT / EP2005 / 000567 and in EP 1144813 Bl.

In EP 1144813 a rotary motor, which is suitable in principle for the actuation of gas exchange valves, is shown. The motor structure as well as the motor acting principle is not closer. In principle, a reluctance principle or a synchronous motor concept is used. In the rotor design, it is assumed that permanent magnets are embedded in the rotor and the magnetic feedback occurs via the rotor. This corresponds to the classic structure of synchronous machines. With this operating principle, the precise and stepless control of valves is possible. However, the drive has a high mass of inertia. Therefore, the required dynamics for the operation of gas exchange valves can not be achieved. Therefore, it makes sense to use springs to assist the acceleration. This is embodied in FIGS. 6a to 7 of the patent EP 1144813. In order not to hold too high To achieve currents in the end positions, a holding means is provided in EP 1144813, which may also be a spring.

In PCT / EP2005 / 000567 a segment motor structure is beschrie ^¬ ben, which has a fixed outer and inner stator and a Bestuckten with permanent magnets, pivotally mounted rotor.

By decoupling the magnetic circuit from the rotor, the inertia of the drive can be significantly reduced without the magnetic efficiency deteriorating. As a result, a corresponding dynamic can be achieved, which is required for the actuation of gas exchange valves. At the same time, almost every rotary position can be controlled by the constant air gap. This allows the required fully variable stroke with high dynamics. In principle, the segment motor principle described in PCT / EP2005 / 000567 is suitable for a valve drive. The invention is based on the ideas of PCT / EP2005 / 000567.

Such a segment motor further includes, as is apparent from FIG. 3 of DE 102005040389.1, a rotor design in which the rotor carrier is designed as a thin-walled pot, on the outside of which permanent magnet elements are arranged. The rotor structure has basically proven to be robust. The power transmission takes place via a transmission member that is connected to a shaft. To transmit the force a recess on the bell is required. The recess for the lever for valve coupling is expensive and reduces the rigidity of the rotor.

The requirements regarding temperature environment, vibration and shock load for the valve train are very high. In particular, the impact load when the valve is set unmanently, is very high. Also when opening the valve can be a shock load, if in a control error, the rotor impinges on a maximum stop. The requirements for the highly dynamic function require in particular Diesel engine high forces. On the other hand, the length of the actuator is limited by the cylinder and the valve distance. To fully exploit the Baulange for cylinder spacing, the valve plane or axis is not symmetrical to the actuator, which means an eccentric mounting of the valve coupling to the rotor. This space available for the actuator must therefore be fully utilized in order to achieve a high power and torque yield.

The rotor structure described in PCT / EP2005 / 000567, as shown in Figures 2, 6 and 6a of PCT / EP2005 / 000567, can not withstand the shock loads and is therefore less suitable. Furthermore, the long execution of the actuator requires an arrangement of the actuators on both sides, or higher offset to the valve. This is unfavorable for assembly purposes and difficult to accommodate in the cylinder head space. Furthermore, the structural load of the long rotor is very high and thus unfavorable.

task

The object of the invention is to provide a compact design of a segment drive.

Solution of the task

This object is achieved according to the invention with a segment drive according to the features of claim 1 or 2. Advantageous embodiments of the segment drives according to claims 1 and 2 result from the features of the dependent claims.

Due to the advantageous structure of the inventive segment drive this can be made compact and lightweight. In addition, it is highly dynamic, mechanically highly loadable and cost-effective to manufacture. He also has a low electrical power consumption. By integrating multiple drives, ie rotors with their associated external and internal stators in a housing, the segment drive is advantageous very small. The invention provides for two, three, four or more drives to be arranged in a modular housing to form a segment drive for a plurality of valves. The advantageous provision of one or more housing intermediate parts, which carry parts of the inner stators of adjacent drives and in particular also receive or support the common bearing shaft for the adjacently arranged rotors, makes it easy to assemble by advantageously a few parts. Also, let the segment drive advantageously produce cost-effective with a reduction of the parts.

Laterally, the housing of the segment drive is limited by Gehauseplatten that can accommodate part of an inner stator. Also, the outer Gehauseplatten serve to support the rotor of the adjacent drive.

The invention further provides for arranging several segment drives side by side as so-called benches on a cylinder block of an internal combustion engine.

The segment drive according to the invention fulfills the following requirements:

high energy efficiency;

Robust mechanical structure that manages the occurring temperature, impact and vibration loads;

Modular design to allow different valve distances with the same design;

Construction is suitable for both a gasoline engine and a diesel engine;

- installation friendly, compact and cost-effective construction; Integration of a heat removal concept;

Consideration of a cost-effective electronic interface to the control unit and the integration of a sensor;

In order to optimize the energy efficiency of the drive, the rotor of the segment drive according to the invention has a low inertial mass, at the same time minimizing the losses of the magnetic circuit. The magnetic circuit can be optimized primarily by minimizing the leakage losses. This is achieved by shortening the length of the iron loop and optimally enclosing the coils with soft iron. Furthermore, it is important to ensure that the permanent magnet elements are always in the magnetic circuit during the lifting movement. The structure of a segment motor described in Fig. 1 of PCT / EP2005 / 000567 has the disadvantage that the outer coils and permanent magnets are not so effective. Therefore, in the segment drive, the excitation yoke should be designed approximately as a three-quarter circle, whereby the magnetic field is homogeneous and the loss of power during a rotational movement is lower. The rotor can then be made in the form of a pot and made more homogeneous, i. be embroidered with magnets over a larger segment. This reduces the structural load and thus enables mass reduction of the rotor.

The doubling of the number of poles allows approximately a force doubling compared to the embodiment in Fig. Ia of PCT / EP2005 / 000567. As a result, the actuator can be made shorter with the same force demand. This in turn has an advantageous effect on the structural load of the rotor. As a result, the air gap between the rotor and the stator can be reduced, which advantageously leads to a power increase. Overall, the energy efficiency can be more than doubled compared to the structure shown in Fig. 1 of PCT / EP2005 / 000567 by the measures described. The three-quarter segment design also allows close positioning of the actuator to the actuator. This has a very advantageous effect on the arrangement of the actuators example ^¬ example of an internal combustion engine. This allows the actuators to be arranged in a row. In the cylinder head of a gasoline engine, which has arranged the valves at an angle to the spark plug, the actuators can be advantageously arranged in series, for example, on the inside of the valves. This allows a narrow and compact design on the cylinder head. In addition, the one-sided coupling of the valves is very easy to install. Even in diesel engines, where the valves are usually vertical, the arrangement is very advantageous. In this case, the actuators are arranged on the outside of the valves. The spark plug is located between the valves.

The housing structure with rotor mounting and fixation of the outer and inner stator is crucial for the robustness of the structure and the cost of the mechanics. The design must ensure that a lot of space is provided for the magnetic circuit, but at the same time the high forces acting on the bearing and the stator must be truncated to ensure long-term stability. Also, the manufacturing and installation tolerances are taken into account to allow the smallest possible air gaps on the rotor. For this purpose, various possibilities of housing construction and storage are shown.

The Gehausekonzepte provide that the actuators modular as a bank or alternatively as a twin or four-valve unit can be constructed. For cost reasons, it makes sense to combine all the actuators of the intake and exhaust valve side into a bank. It is also possible, in particular with a small valve angle, to combine two inlet actuators and two exhaust valve actuators in one housing. For reasons of ease of maintenance, however, it may also be expedient that only two or four adjacent actuators are combined into one unit. Adjacent ac- In this case, each tuatoren share an intermediate housing part or a common bearing part, in which a rotor or several rotors of adjacent actuators are partially stored. The housing of the segment drive is completed by a wider end wall.

The embedding of all actuators in a die-cast housing is advantageous. It is important that the casting resin is flush with the side plates in order to increase the stiffness of the actuator under load.

The rotor is advantageously designed with regard to a production-oriented solution of two deep-drawn pots, which may be connected in particular form-fitting with a lever to which the actuator is coupled.

On the outside of the rotor, the permanent magnet elements or a nachtraglich magnetized magnetic ring are preferably attached. If necessary, the pots are stiffened by a Verstarkungsring or a federal government.

On the coupling member of the rotor, a needle bearing is preferably provided, which allows the wear-free operation without circulating oil lubrication.

The bearing of the rotor via a bearing shaft, which is frictionally or form-fittingly connected to the rotor and is mounted in the outer Gehauseplatten or the housing intermediate parts of adjacent actuators. Alternatively, the rotors may be rotatably mounted on one or more fixed, preferably on a bearing shaft pressed in the housing. As bearings are preferably roller bearings with small clearance and self-lubrication.

To control the actuator is advantageously an integrated in the interior of the actuator rotation angle sensor. The

Integration of the rotation angle sensor has over the valve lift sensor shown in Fig. 1 has the advantage that the drive can be pre-tested as a unit before mounting on the cylinder head. This allows the contacts to be reduced and the cost of construction and electrical connection ^¬ rule to reduce the number. In addition, the rotation angle sensor allows better control, since a possible me ^¬ chanic clearance between the rotor and valve does not adversely affect the control.

The efficiency can be improved by a copper full factor. This can be achieved by each tooth of the yoke each carry an exciter coil. The exciter coils are advantageously made of baked enamel wire in a step winding, so that the winding space is optimally filled. Also conceivable is a winding with hexacoils, which allow a good fullfactor.

An advantageous coupling between the rotor and valve via a rotary joint and a bending shaft. The swivel allows the valve to turn around its axis, the bending shaft absorbs the axial misalignment. An integration of the sensor in the actuator also has the advantage that the valve can be made simpler, since no account has to be taken of the required sensor target for the valve lift sensor.

Hereinafter, possible embodiments of the segment drives according to the invention are explained in greater detail on the basis of drawings.

Show it:

Fig. 1: Basic structure of the inventive segment drive with the parts for a single valve drive in a perspective exploded view;

FIG. 2a is an illustration of the arrangement of the actuators on the diesel engine cylinder head in cross section; FIG. FIG. 2b shows an illustration of the arrangement of the actuators on the gasoline cylinder head in cross section; FIG.

3a shows a cross-sectional view of the actuator with the yoke attachment in the housing and exciting coil configuration;

3b: a cross-sectional view of the actuator with housing with a second alternative yoke attachment;

4a shows a longitudinal section of a first possible embodiment of a storage and Gehausekonzeptes for the modular design for multiple segment motors

4b shows a longitudinal section of a second possible embodiment of a storage and housing concept;

4c shows a longitudinal section of a third possible embodiment of a storage and housing concept;

5 shows a longitudinal section of a fourth embodiment of a storage and housing concept with a common bearing shaft for the two rotors as a twin drive;

5a shows a longitudinal section of a fifth embodiment of a storage and housing concept based on the fourth embodiment;

5b shows a cross-sectional view of the arrangement of a segment drive according to the fifth embodiment on a diesel engine cylinder head (left illustration) and on a gasoline cylinder head (right illustration); Fig. 6: perspective view of a bank arrangement on a cylinder head.

Fig. 1 shows a first possible embodiment of the ER- findungsgemaßen segment drive, wherein only a portion ei ^¬ nes Twinsegementantrieb is shown in the exploded view. Essentially, the segment drive consists of the assemblies outer housing plate 11, housing intermediate part 12, rotor 1, outer stator 7 with excitation coils 8 and inner stator 9, housing part 10 with storage and Kuhlkreisbohrungen IIa, and valve coupling. 3

The rotor 1 carries a plurality of permanent magnets 2 and has an eccentric bearing bush 3, to which the connecting rod 25 of the valve 17 is coupled. For stiffening the Rotorgerustes are optionally Verstarkungsringe 5 at the edges of the rotor. The rotor 1 is rotatably supported via the bearing shaft 4 by means of preferably roller bearings 13 in the outer housing plate 11 and the housing intermediate part 12. For possible cooling of the actuator are suitable recesses IIa, in particular in the form of Kuhlbohrungen in Gehausewandung 10, the outer Gehauseplatte 11 and the housing intermediate part 12. By means of fittings 27 and dowel pins 28, the entire segment drive is clamped positionally accurate. The axial bearing fixation can be done via starting discs 14. The excitation circuit consists of a plurality of yoke teeth 7, which are bestuckt with coils 8 and are fixed in the housing 10. The magnetic circuit is closed via the rotor 1 with air gap on both sides and the inner yoke 9. This is positively secured via a groove in the housing 10 in a form-fitting manner via a corresponding groove 29. The pivotal movement of the rotor is transmitted via a suitable valve coupling, which is preferably Bestuckt with rolling bearings 6 in the bearing bush 3, in a translational movement of the valve 17. The valve has, in addition to the valve foot 17, preferably a bending soft shaft 20, which compensates for the resulting by the rotational movement relative offset of the bearing bush 3 to the valve axis elastic. The coupling takes place with a connecting rod 19 attached to the shaft 20. The position signal of the valve is detected by the valve lift sensor 21 via a target mounted on the valve sleeve 18. Alternatively, the valve position can be determined indirectly via the rotor position. A suitable rotation angle sensor is described in detail in FIG.

On the side facing away from the drive shown side of the housing intermediate part 12, a further drive is arranged. This can be constructed in principle mirror-symmetrical to the drive shown. The housing part is the only common part of the two drives.

FIGS. 2 a and 2 b show the universal applicability of the actuator for different combustion engine concepts. FIG. 2 a shows a cross section perpendicular to the motor axis of an actuator placed on a diesel engine cylinder head 24. The axis of the valve 17 is parallel to the cylinder axes in this cylinder head design. FIG. 2 b shows the cross section of an actuator placed on a gasoline cylinder head 25. It is essential in this case that the rotor of the actuator can be arranged both towards the center plane of the cylinder head (inside) and away from the center plane (outboard). Optionally, a sensor element 22 can be arranged in an extension of the valve stem.

Fig. 3a shows a cross section through a drive of the segment drive perpendicular to the axis of rotation of the rotor. The outer stator is made up of at least 4 yoke teeth 7, the circumferential extent of the outer stator amounts to> 200 °. For fixing the yoke teeth 7 in the housing 10 there is at least one form-fitting connection 15, shown here in dovetail design. Here, the Jochzahne 7 can be designed as a single package or several combined. The coils 8, preferably executed in baked enamel technique, are designed in this variant as step coils, which are individually pushed onto the yoke 7. The individual coils can be connected here in the housing in series or in parallel. The bespulte stator can be cast after mounting in the housing. The attachment of the actuator on the cylinder head via screws. For this purpose, there are tabs 26 on the housing.

As shown in FIG. 3 b, the outer yoke can be designed to be split in several parts, wherein the individual yoke teeth 7 are inserted in a form-locking manner, for example by means of dovetail connections 15, in an annular jaw 30. This ring 30 is also secured via formschlussige connections 15 in the housing. In the same picture below, a possibility of Außenjoch- design is shown, in which the outer stator 31 is designed with yokes in one piece. The outer stator is formed after the coil assembly to round shape. Here, the separating surfaces 15a should be designed as possible with a small air gap or the yoke plates offset into each other in order to keep the magnetic resistance small.

The outer stator can be cast or glued into a die-cast part, with the annular indentation 30 preferably being suitable for the gluing, since the one-piece outer stator 31 is already embedded in the housing 10 in a positive-locking manner.

Fig. 4a shows a first possible embodiment of a storage and Gehausekonzeptes for modular design for multiple segment drives. The housing 10, which fix the bespulten Außenstatoren in their position, are here carried out separately from the outer Gehauseplatten 10 and the housing intermediate part 12 and form so-called. Gehausewandungs- sections. These are positioned exactly to each other during fitting via fits or pin bores. The outer housing plate 10 and the housing intermediate part 12 can also be used as end shields for at least one drive or actuator. The bearing receptacle, which carries the inner yoke 9 on the outer circumference, is designed as a cylindrical turned part, which is positively connected to the flat end shield and frictionally engaged with each other. For example, boron technology is suitable for this purpose.

4b shows a second embodiment of the storage and housing concept for a plurality of segment drives, in which a wall section 33 is integrally formed on the housing intermediate part 12. The housing intermediate part is thus a pot-shaped part whose cylindrical wall is used to abut the outer stator and is not present in the region where the coupling for the valve is arranged. The outer housing plate 11 can also incorporate the bearing eye of the adjacent drive here.

FIG. 4c shows a third embodiment of the storage and housing concept, in which the housing intermediate part 12 has a collar-shaped wall section 34 on each side and is therefore designed T-shaped.

The embodiments of FIGS. 4a to 4c have in common that the rotors 1 of the adjacently arranged drives are arranged rotationally fixed on a shaft 1a and the shaft 1a is mounted in the housing by means of roller bearings 13. The housing intermediate part 12 carries on both sides in each case a part of the inner stators of the two drives and forms the bearing for the waves Ia of the drives. The housing intermediate part 12 shown on the left is adjoined by a further drive whose part of the inner stator is supported by the housing intermediate part 12 and whose shaft 1a is likewise mounted in the intermediate housing part.

In Fig. 5 a fourth embodiment of the storage and Gehausekonzeptes is shown, wherein the rotors of the running as a twin drive segment drive are rotatably mounted on a common bearing shaft 35 by roller bearings 13. The bearing shaft 35 may be locked frictionally or formschlussig in the housing ^¬ sezwischenteil 34 a. By means of clamping rings 37 at the outer ends of the bearing shaft 35 and the roller bearings 13 a ^¬ comprehensive sliding ring discs 38 ensures that the bearing shaft 35 is held axially in position. Selbstver ^¬ comprehensible, it is possible for For two-piece bearing shaft 35 ^¬ form.

Furthermore, the placement of a rotation angle sensor 22 is shown in FIG. The sensor 22 is fitted into a recess in the outer Gehauseplatte 11 in alignment with the axis of rotation of Ro ^¬ tors. The target 23 for detecting the rotational angular position is fixed to the rotor 1. For the electrical connection lines to the sensor 22, a thin foil technique FPC 22d is advantageously arranged or connected to the Hall IC 22b in this connection.

FIG. 5 also shows two important dimensions L _z = cylinder spacing and L _v = valve spacing determining the structure. Within the overall length L _z , the length of the outer stator 7 and that of the permanent magnet 2 should be as large as possible for optimal power development. The necessary space for turning the coils is to be optimized for this purpose. This is only possible if the width B of the outer Gehauseplatten 11 is low. For this purpose, it is necessary for stiffening that all dead spaces between coils, bearing plates and outer stator are filled with casting resin 40 so that this contributes to the stiffening of the entire structure. For the stiffness of the Gehauseplatten also a high modulus of elasticity is important. It is therefore appropriate to carry out the Gehauseplatten in a composite construction by the bearing parts 11 and 34a for bearing pin and inner yoke made of aluminum and the Verstarkungsplatten 36 made of steel or carbon fiber material. The bearing shaft 35 can be used in addition to the bearing of the rotor for centering the outer housing plate 32a and thus the inner inner yoke 9a. Thus, a high concentricity between the rotor and the inner yoke can be ensured. The tolerance chain te and the associated production costs can thus be reduced. The sensor target 23 is made in this case with a through-hole and the rotation angle sensor 22 is positioned eccentrically.

FIG. 5a shows a further fifth possibility of the storage and housing concept, which is based on the embodiment illustrated in FIG. Same elements will not be described here again. In the embodiment gem. 5a, the Verstarkerplatten 36 shown in Fig. 5 and thus the thickness B are saved. This is located between the coils 8 of the drives of the segment drive no wall, so that the actuator available to the length L _z = maximum cylinder distance can be utilized for the magnetic circuit. To increase the degree of full copper, the spools 8 can be additionally compressed at least on the front side via suitable devices. Thus, the distance A _{sp is} reduced and the effective magnet length further increased.

The bearing shaft 35 is also pressed in the housing intermediate part 34 a. This intermediate housing part 34 protrudes with a part 34a between the rotors 1 into the interior of the rotors 1 and receives the inner stators 9 here. The housing intermediate part 34a is connected to the outer stators supporting housing part 34 in the middle of the housing, as shown in Fig. 5b. As a result, the enclosure in the area is enclosed in this area. The coil wires 8a are removed laterally and can be contacted in a housing recess 34e corresponding to the selected circuit in series or in parallel via el. Connecting parts 8b, preferably made of stamped grid. These connections then went to the electrical control unit. Parallel runs the film 22d, which leads to the plug 22e. By conventional shielding measures, the sensor line can be kept free from harmful interference of the magnetic fields of the coils. For additional reinforcement of the housing part 34a, vertically extending ribs can be formed on the outside of the housing. Ribs and cheeks form with the home 34 and housing intermediate part 34 a unit and are preferably made as a die-cast part.

The outer housing plate 32a is clamped between the housing parts 34, 34a and establishes the connection to the next actuator. It carries both inner yokes 9a and also two rotation angle sensors 22.

FIG. 5b shows this arrangement in a section perpendicular to the rotor axis. As mentioned in the description of Fig. 5a, in the middle of the segment drive, the housing intermediate part 34 is circumferentially connected to the housing 34 via the cheeks 34c and 34d. These cheeks 34c, 34d and have the same length as the housing 34. Thus, the housing intermediate part 34 is well supported. In the interior of the rotor inner yoke 9 is drawn.

Fig. 6 shows a bank arrangement of the actuators on a cylinder head with fastening by means of screws 26a and 26b, which are connected to the Aktuatorgehause. As already shown in Figure 2, the actuators for actuating adjacent valves of the exhaust or intake valve side are arranged in series one-sided to the valve and at a height. The housing of the actuators can in this case be in one piece or in several parts, so that individual actuators can be disassembled individually, for example, for assembly or repair reasons. The terminals 37 of the coils and sensors are best executed at the top and are contacted directly with the electronics. The actuators are bolted to the long side with, for example, three tie rods 38. There is room for the spark plug or ignition coil 39 between the actuators or injectors for direct injection engines. Reference sign:

1: rotor

Ia: rotor shaft

2: permanent magnet

3: Bearing bush for valve coupling

4: bearing shaft of the rotor

5: reinforcing ring for Rotortopf

6: Rolling bearing for the valve coupling

7: yoke teeth

8: coil

9: inner yoke

10: housing

11: outer housing plate

IIa: Kuhlbohrung

12: Housing intermediate part

13: Rolling bearing of the main shaft

14: starting disc

15: Dovetail fixation

16: Actuator mounting

17: valve foot

18: valve sleeve

19: connecting rod

20: valve stem

21: valve lift sensor

22: rotation angle sensor

23: Target for rotation angle sensor

24: Diesel cylinder head

25: Otto cylinder head

26: mounting straps housing

27: tie rod

28: dowel pins

29: anti-twist inner yoke

30: Ring-shaped jerk

31: One-piece outdoor stator

32: middle bearing plate

33: L-shaped housing / end shield

34: T-shaped housing / end shield

34a: Intermediate housing - internal

34b: cheeks, an integral part of the housing intermediate part

34c: like 34b

35: bearing shaft

36: reinforcing plate

37: clamping ring

38: Sliding discs

39: Ignition coil

40: Giesharz

Claims

Patent claims

1 segment drive, having a plurality of permanent magnets (2) bearing rotor (1), wherein the permanent magnets (2) are arranged in a first portion of the circumference of the rotor, and in a second portion in which no permanent magnets are arranged, a bearing ( 5) is arranged for valve coupling, wherein the first portion of the rotor (1) of an outer stator (7,8) at least partially and within the rotor (1) an inner stator (9) is arranged, with inner and outer stator on Housing of the segment motor are attached or integrated, characterized in that in the housing of the drive at least two rotors (1) are arranged with associated outer and Innenstatoren, wherein between two rotors (1) a housing intermediate part (12, 34a) is arranged, and the rotors (1) are mounted on the intermediate housing part (12, 34a) or on a shaft (1a, 35a) in the intermediate housing part (12, 34a).

2. segment drive according to the preamble of claim 1, character- ized in that in the housing of the segment drive at least two drives are arranged, each drive having a rotor (1) with associated outer and inner stator, wherein a housing intermediate part is arranged between two drives , and on the housing intermediate part (12, 34a) at least parts of an inner stator (9) and / or outer stator of one or both of the housing intermediate part adjacent drives is or are arranged.

3. segment drive according to claim 1 or 2, characterized in that arranged at the housing intermediate part at least one axially directed projection, in particular molded or fixed, on which a rotor and / or outer stator and / or inner stator is mounted.

4. Segment drive according to claim 1 or 2, characterized in that the rotors of two adjacent drives are mounted on or in the housing intermediate part, wherein the housing intermediate part additionally carries parts or the entire inner stator of at least one of the two drives.

5. Segment drive according to one of the preceding claims, characterized in that the housing of the segment drive is enclosed by two outer housing plates (11).

6. segment drive according to claim 5, characterized in that at least one of the two outer Gehauseplatten (11) receives or supports a bearing shaft or the rotor (Ia) of the adjacent drive.

7. segment drive according to one of claims 5 or 6, characterized in that at least one of the two outer Gehauseplatten has at least one axially inwardly directed projection or an axially inwardly directed collar which carries the inner stator or a part of the inner stator of the outer drive.

8. Segment drive according to one of the preceding claims, characterized in that the rotor of a drive over a ümfangswinkelbereich from 180 to 300, in particular 200 to 270 degrees (360 ° yield a full circle) is occupied by permanent magnets.

9. segment drive according to one of claims 1 to 7, characterized in that the rotor via a Um- Fangswinkelbereich large 200 degrees (360 ° result in a full circle) is occupied by permanent magnets.

10. Segment drive according to one of the preceding claims, characterized in that at least two rotors, each with associated outer and Innenstatoren are arranged between the outer GE, wherein in one outer Gehauseplatte a shaft end of an outer rotor and in the other Gehauseplatte a Shaft end of the other outer rotor is mounted, wherein the other shaft ends are mounted in at least one housing intermediate part.

11. Segment drive according to one of the preceding claims 1 to 9, characterized in that the housing intermediate part carries or supports at least one bearing shaft or at least one bearing shaft is formed on the housing intermediate part or is arranged on or in this in particular rotationally fixed, and on the or the bearing shaft ( n) the rotors are rotatable, in particular by means of rolling bearings (13) are mounted.

12. segment drive according to one of claims 1 to 9, characterized in that each rotor (1) on a shaft (Ia) is arranged rotationally fixed, wherein the shaft (Ia) rotatably in the Gehauseplatten (11) and / or a housing intermediate part (12 ) is stored.

13. Segment drive according to one of the preceding claims, characterized in that the inner stator (9) is divided at least one drive in the axial direction, wherein either both Innenstatorteile at the respective drive laterally limiting Gehausezwischen- are arranged or, if the drive to a outer housing plate adjacent, an inner stator on a housing intermediate part and the other inner stator part of the outer housing plate is arranged.

14. segment drive according to one of the preceding claims, characterized in that a segment motor encompassing Gehausewandung the outer stators of the drives carries.

15. segment drive according to claim 14, characterized in that the Gehausewandung laterally abuts the outer Gehauseplatten or are attached thereto.

16. segment drive according to claim 14, characterized marked, that the Gehausewandung is formed of a plurality of axially juxtaposed wall sections, wherein one or more Außenstatoren are each arranged on a wall portion or are supported by this.

17. segment drive according to claim 16, characterized in that a wall portion laterally adjacent to an outer housing plate and / or a housing intermediate part and in particular abuts on this or is attached to this.

18. segment drive according to one of claims 14 to 17, characterized in that the Gehausewandung or a wall portion is attached to an outer housing plate or to a housing intermediate part or formed on this or this.

19. Segment drive according to one of claims 14 to 17, characterized in that an outer Gehauseplatte laterally adjacent to the Gehausewandung or a wall portion or / or is attached thereto.

20. Segment drive according to one of claims 14 to 19, characterized in that at least on an outer housing plate and / or a housing intermediate part Collar extending or integrally formed in the axial direction, which forms the Gehausewandung or a wall portion, at the inner wall at least one outer stator rests and / or is fastened to this.

21. segment drive according to claim 20, characterized in that the collar extends only over a Umfangswinkelbe- range of 180 to 300, in particular 220 to 290 degrees (360 ° result in a full circle).

22 segment drive according to one of claims 14 to 21, characterized in that the outer stators are held formu- schlussig on the Gehausewandung or the wall sections.

23. segment drive according to one of claims 14 to 21, character- ized in that the outer stators are held on the Gehausewandung or the wall sections by means of connecting means, in particular screws or adhesive.

24. Segment drive according to one of the preceding claims, characterized in that the outer Gehauseplatten of the housing are held together by extending in the axial direction screws.

25. Segment drive according to claim 24, characterized in that at least one screw passes through a housing intermediate part.

26. Segment drive according to one of the preceding claims, characterized in that the outer Gehauseplatten is made of a material with a high modulus of elasticity.

27. Segment drive according to one of the preceding claims, characterized in that the outer Gehauseplatten are formed by a composite construction.

28 segment drive according to one of the preceding claims, characterized in that the yoke legs with Erre ^¬ gerspulen adjacent drives anemandergrenzen without NEN ^¬ desirable air gap.

29. Segment drive according to one of the preceding claims, characterized in that the coils are compressed in the longitudinal direction ^¬ tion to achieve a high full factor.

30. Segment drive according to one of the preceding claims, characterized in that at least one angle of rotation sensor and cooperating target is arranged on the rotor on an outer housing plate or the housing intermediate part.

31 segment drive according to claim 30, marked thereby, that the sensor is a Hall element, which is arranged in particular on a film.

32. segment drive according to claim 31, characterized in that the film has means for shielding electric fields or electromagnetic fields up, wherein the film is guided between the coils to the outside of the housing of the segment drive.

33. segment drive according to one of the preceding claims, characterized in that the excitation coils and outer stators are shed together in the housing.

34. segment drive according to one of the preceding claims, characterized in that the yoke legs and an Außenstatorrmg together with the excitation windings form the outer stator.

35. segment drive according to one of claims 1 to 34, character- ized in that the yoke legs and the outer stator are in one piece and are formed after the coil assembly to round shape.

36. Segment drive according to one of the preceding claims, characterized in that the electronic Steue ^¬ tion of the segment drive is arranged on the housing top.

37. Segment drive according to one of the preceding claims, characterized in that the Langenverhaltnis the distance of the permanent magnets to the axis of rotation and the distance of Ventilbetatigung to the axis of rotation between 0.8 and 1.2.

38. Segment drive according to one of the preceding claims, characterized in that an external stator comprises an excitation yoke consisting of preferably eight yoke poles and eight coils, wherein each four coils are connected in a circuit in parallel or in series.

39. Segment drive according to one of the preceding claims, characterized in that the inner stator is formed of a magnetically conductive material and as a ring segment, which is supported on a Gehauseplatte.

40. Segment drive according to one of the preceding claims, characterized in that the inner stator is secured against rotation on the housing or the housing plate, in particular by means of positive locking and / or glued.

41. Segment drive according to one of the preceding claims, characterized in that the space between the outer stator, housing parts and coils and at least one housing plate with filler, in particular casting resin is filled, wherein the filler stiffens the housing plate.

42. Segment drive according to one of the preceding claims, characterized in that the excitation coils Baked enamel are formed, which are wound in a step shape.

43. Segment drive according to one of the preceding claims, characterized in that the connections for the exciter coils for connection to a power unit of a control device are arranged on the open side of the housing.

44. Segment drive according to one of the preceding claims, characterized in that the housing of the Segmentmo- sector having Kuhlkanale.

45. Segment drive according to one of the preceding claims, characterized in that the segment motor has at least one end stop for the rotor for limiting the Offnungshubes and / or calibration of the sensor.

46. Segment drive according to one of the preceding claims, characterized in that the outer Gehauseplatten and / or housing intermediate parts are arranged perpendicular to the rotor axis.

47. segment drive according to claim 46, characterized marked, that the plates are arranged parallel to each other.

48. segment drive according to one of the preceding claims, characterized in that a plurality of segment drives are arranged side by side and summarized in a bank.

49. segment drive according to claim 48, characterized in that the housing of the plurality of segment drives are held together by axial screws, wherein the screws at least pass through the outer Gehauseplatten the individual segment drives and optionally the housing intermediate parts and hold together.

50. segment drive according to one of claims 48 or 49, characterized in that the mutually facing outer Gehauseplatten two adjacent segment drives a bank bank have a smaller wall thickness than the outer Gehauseplatten the bank.

51. segment drive according to one of claims 48 to 50, characterized in that a plurality of benches side by side and / or one above the other are arranged on a cylinder head of an engine.

52. segment drive according to claim 51, characterized in that between the banks spark plugs, Gluhkreise and / or injectors are arranged.

53. Valve drive for a gas exchange valve with at least one segment drive according to one of the preceding claims, characterized in that a target is arranged on the valve stem, which serves together with a sensor for determining the valve lift or the position of the valve stem.

54. Valve drive for a gas exchange valve with at least one segment drive according to one of claims 1 to 53, characterized in that two drives for intake valves and two drives for exhaust valves are arranged in a housing.