Adjustable roll stabilizer

Abstract

Adjustable roll stabilizer (1) with an actuator (13) comprising an actuator housing (20), an actuator motor (22) arranged in the actuator housing (20), an actuator gearbox (23) arranged in the actuator housing (20) and driven by the actuator motor (22), and an actuator shaft (21) rotatable relative to the actuator housing (20) about a stabilizer rotation axis (17) extending in a transverse direction (y), which forms or is connected to an output shaft of the actuator gearbox (23), a stabilizer bar (16) which is divided into two bar halves (14, 15) connected to each other by the actuator (13), of which a first bar half (14) is connected to the actuator housing (20) and a second bar half (15) is connected to the actuator shaft (21), an actuator rotary encoder (25) by means of which a rotation angle (Δθ_actuator) a reference component connected to or formed by one of the rod halves is detectable relative to the actuator housing (20),wherein the actuator encoder (25) has an encoder stator (26) connected to the actuator housing (20) and an encoder rotor (27) connected to the reference component, and a coupling rod (28) arranged coaxially with the actuator shaft (21) forming the reference component and guided through a coupling rod recess (29) extending through the actuator drive (23), by means of which the encoder stator (26) is connected to the actuator housing (20) or the encoder rotor is connected to the actuator shaft (21).

Description

[0001] The invention relates to an adjustable roll stabilizer with an actuator comprising an actuator housing, an actuator motor arranged in the actuator housing, an actuator gearbox arranged in the actuator housing and driven by the actuator motor, and an actuator shaft rotatable relative to the actuator housing about a stabilizer axis extending in a transverse direction, which forms or is connected to an output shaft of the actuator gearbox, a stabilizer bar divided into two bar halves connected to each other by the actuator, a first bar half being connected to the actuator housing and a second bar half being connected to the actuator shaft, and an actuator encoder by means of which a rotation angle of a reference component connected to or formed by one of the bar halves relative to the actuator housing can be detected.wherein the actuator encoder has a encoder stator connected to the actuator housing and an encoder rotor connected to the reference component.

[0002] When rotational torque is introduced into a planetary gearbox, for example by an electric motor, an additional angle is superimposed at the gearbox output, in addition to the gear ratio. This angle provides information about the torsional flexibility of the overall system. The more torque is transmitted, the larger this additional angle becomes, similar to a long ship propeller shaft, which exhibits a considerable twist angle in the two- to possibly three-digit range under full load. To calibrate this flexibility, the system stiffnesses are precisely determined using a torque curve, and the measured angles during torque application and output are subtracted, taking the gear ratio into account. This yields the additional angle, which is proportional to the torque.

[0003] Currently, torques are measured using various methods. However, many of these methods are subject to factors that influence the measurement result, such as environmental influences, temperature drift, material variations, etc. Furthermore, some conventional measurements are complex and expensive.

[0004] DE 10 2006 040 109 A1 discloses a split motor vehicle stabilizer with a built-in swivel motor for roll control, which consists of at least one adjustment drive comprising motor and gearbox and a housing, wherein at least one housing part is connected to an associated stabilizer part for torque transmission in such a way that the housing part has an axially directed, central indentation into which the stabilizer part extends substantially to its end and wherein the connection for torque transmission between the housing part and the associated stabilizer part is located there, wherein a sensor for detecting the torsion angle of the stabilizer part is attached to the housing part, the sensor of which is fixed to the stabilizer part or vice versa.

[0005] A disadvantage is that measurements are only taken on one side of the actuator, e.g., the side where the torque is applied. Furthermore, the indentation takes up a significant amount of installation space within the housing.

[0006] Based on this, the invention is primarily aimed at measuring the angle of rotation between both sides of the actuator, i.e., between the side where the torque is applied and the side where the torque is applied. Furthermore, a space-saving method for measuring the angle of rotation is to be provided.

[0007] This problem is solved according to the invention by an adjustable roll stabilizer according to claim 1. Preferred embodiments of the invention are given in the dependent claims and in the following description.

[0008] An adjustable roll stabilizer comprising an actuator, which has an actuator housing, an actuator motor arranged in the actuator housing, an actuator gearbox arranged in the actuator housing and driven by the actuator motor, and an actuator shaft rotatable relative to the actuator housing about a stabilizer axis extending in a transverse direction, which forms or is connected to an output shaft of the actuator gearbox, a stabilizer bar divided into two bar halves connected to each other by the actuator, a first bar half being connected to the actuator housing and a second bar half being connected to the actuator shaft, and an actuator encoder by means of which a rotation angle of a reference component connected to or formed by one of the bar halves relative to the actuator housing can be detected, wherein the actuator encoder has a encoder stator connected to the actuator housing and an encoder rotor connected to the reference component.According to the invention, the device is further developed in particular by a coupling rod arranged coaxially with the actuator shaft forming the reference component and guided through a coupling rod recess extending through the actuator gear, by means of which the encoder stator is connected to the actuator housing or the encoder rotor to the actuator shaft.

[0009] The connecting rod passes through the actuator gearbox. Therefore, it is possible to transmit mechanical information regarding the rotational position of the reference component or the actuator housing from one side of the actuator gearbox to the other. Thus, for example, the actuator encoder can detect the rotation of the actuator shaft relative to the actuator housing.

[0010] The measurement of a rotation angle between the actuator housing and the first rod half at the distance from its connection point to the actuator housing can be omitted. Consequently, the indentation created for such a measurement can also be omitted. However, it should not be ruled out that it might still be possible to measure a rotation angle between the actuator housing and the first rod half at the distance from its connection point to the actuator housing.

[0011] Preferably, the actuator housing extends along the stabilizer's axis of rotation. Preferably, the stabilizer's axis of rotation runs centrally through the actuator housing.

[0012] Preferably, the actuator shaft runs along the stabilizer's axis of rotation. Preferably, the stabilizer's axis of rotation runs centrally through the actuator shaft. For example, the actuator shaft is rigidly and / or torsionally rigidly or elastically connected to the output shaft of the actuator drive. Alternatively, the output shaft of the actuator drive is formed, for example, by the actuator shaft. Preferably, the connecting rod recess also extends through the actuator shaft. Therefore, the actuator shaft is advantageously designed as a hollow shaft.

[0013] The actuator gearbox preferably has an output shaft. Preferably, the actuator gearbox has a drive shaft. Advantageously, the drive shaft is connected to the actuator motor and / or can be driven by it. The actuator gearbox is or preferably comprises a planetary gearbox, in particular a single-stage or multi-stage one.

[0014] Preferably, the output shaft of the actuator drive runs along the stabilizer's axis of rotation. Preferably, the stabilizer's axis of rotation runs centrally through the output shaft of the actuator drive. For example, the output shaft of the actuator drive is rigidly and / or torsionally rigidly or elastically connected to the actuator shaft. Alternatively, the actuator shaft is formed, for example, by the output shaft of the actuator drive. Preferably, the connecting rod recess also extends through the output shaft of the actuator drive. Therefore, the output shaft of the actuator drive is advantageously designed as a hollow shaft.

[0015] Preferably, the drive shaft of the actuator gearbox runs along the stabilizer's axis of rotation. Preferably, the stabilizer's axis of rotation runs centrally through the drive shaft of the actuator gearbox. Advantageously, the connecting rod recess also extends through the drive shaft of the actuator gearbox. Therefore, the connecting rod is preferably also guided through the drive shaft of the actuator gearbox. Advantageously, the drive shaft of the actuator gearbox is designed as a hollow shaft.

[0016] Preferably, the rod halves run along the stabilizer's axis of rotation. Preferably, the stabilizer's axis of rotation runs centrally through the rod halves. Any angled end regions of the rod halves, which, for example, run transversely or obliquely to the stabilizer's axis of rotation, are disregarded. Preferably, the first rod half is rigidly and / or torsionally rigidly connected to the actuator housing. Advantageously, the second rod half is rigidly and / or torsionally rigidly connected to the actuator shaft.

[0017] Preferably, the encoder stator is rigidly and / or torsionally rigidly connected to the actuator housing. Preferably, the encoder rotor is rigidly and / or torsionally rigidly connected to the reference component or the actuator shaft. Advantageously, the actuator encoder can provide at least one rotation angle signal that characterizes the rotation angle of the reference component or the actuator shaft relative to the actuator housing.

[0018] The actuator motor preferably comprises a motor shaft. Preferably, the motor shaft runs along the stabilizer's axis of rotation. Advantageously, the stabilizer's axis of rotation runs centrally through the motor shaft. In particular, the motor shaft is rotatable about the stabilizer's axis of rotation and / or about a motor axis of rotation. Advantageously, the motor axis of rotation coincides with the stabilizer's axis of rotation or runs parallel to it. The motor shaft forms, for example, the drive shaft of the actuator gearbox or is connected to it, in particular rigidly and / or in a torsionally rigid manner. The actuator motor preferably comprises a motor stator. Preferably, the motor stator is connected to the actuator housing, in particular rigidly and / or in a torsionally rigid manner. The actuator motor preferably comprises a motor rotor. Preferably, the motor rotor comprises the motor shaft. Advantageously, the motor rotor is connected to the motor shaft, in particular rigidly and / or in a torsionally rigid manner.

[0019] Preferably, the coupling rod recess extends, in particular, through the actuator motor. Preferably, the coupling rod is thus guided, in particular, through the actuator motor. Advantageously, the coupling rod recess extends, in particular, through the motor shaft. Preferably, the coupling rod is thus guided, in particular, through the motor shaft. Advantageously, the motor shaft is therefore designed as a hollow shaft.

[0020] The connecting rod is preferably made of plastic. For example, the connecting rod is made of fiber-reinforced plastic. Alternatively, the connecting rod is made of metal, for example.

[0021] According to one possible first variant, the coupling rod is connected, for example, in the area of ​​the first end of the coupling rod recess facing the first half of the rod to the actuator housing and in the area of ​​the second end of the coupling rod recess facing the second half of the rod to the encoder stator and / or the coupling rod is connected, for example, in the area of ​​its end facing the first half of the rod to the actuator housing and in the area of ​​its end facing the second half of the rod to the encoder stator.

[0022] Preferably, especially according to the first variant, the actuator encoder is arranged in the transverse direction behind the actuator gearbox and the latter behind the actuator motor.

[0023] According to a possible second variant, the coupling rod is connected to the encoder rotor in the area of ​​the first end of the coupling rod recess facing the first half of the rod and to the actuator shaft in the area of ​​the second end of the coupling rod recess facing the second half of the rod and / or the coupling rod is connected to the encoder rotor in the area of ​​its end facing the first half of the rod and to the actuator shaft in the area of ​​its end facing the second half of the rod.

[0024] Preferably, especially according to the second variant, the actuator encoder is arranged in the transverse direction in front of the actuator motor and the latter in front of the actuator gearbox.

[0025] According to a possible first alternative, the coupling rod, particularly according to the first variant, is designed as a hollow rod. Preferably, one or more connecting lines run inside the hollow rod, by means of which the actuator rotary encoder can be supplied with electrical energy and / or at least one measurement signal provided by the actuator rotary encoder can be transmitted.

[0026] According to a possible second alternative, the connecting rod, in particular according to the second variant, consists of solid material.

[0027] According to an advantageous embodiment, a control unit connected to the actuator encoder is provided, by means of which the actuator motor can be controlled, in particular depending on the angle of rotation of the actuator shaft relative to the actuator housing.

[0028] Preferably, the actuator motor has a motor encoder, preferably connected to the control unit, by means of which the angle of rotation of the motor shaft of the actuator motor relative to the actuator housing and / or the motor stator can be detected. Advantageously, the actuator motor can also be controlled by the control unit as a function of the angle of rotation of the motor shaft relative to the actuator housing and / or the motor stator.

[0029] According to an advantageous embodiment, the actuator rotary encoder is based on a magnetic, an inductive or an optical measuring principle.

[0030] For example, in the actuator rotary encoder based on the magnetic measuring principle, the encoder stator is connected to the actuator housing by the coupling rod. In particular, in the actuator rotary encoder based on the magnetic measuring principle, the encoder stator has at least one magnetic field-sensitive sensor, which is preferably at least partially surrounded or encircled by one or more magnets provided on the encoder rotor, for example, sector-shaped magnets such as a ring magnet or partial ring magnet, wherein the magnet is preferably a permanent magnet. The at least one magnetic field-sensitive sensor is connected, for example, to an encoder operating unit. Preferably, the at least one magnetic field-sensitive sensor or the encoder operating unit is connected to the control unit.

[0031] For example, in the actuator rotary encoder based on the inductive measuring principle, the encoder rotor is connected to the actuator shaft by the coupling rod. In particular, in the actuator rotary encoder based on the inductive measuring principle, the encoder rotor has at least one encoder wheel which interacts with one or more induction loops provided on the encoder stator. The one or more induction loops are, for example, connected to the encoder operating unit. Preferably, the one or more induction loops or the encoder operating unit are connected to the control unit.

[0032] According to an advantageous embodiment, a vehicle body and two laterally spaced vehicle wheels are provided, which are connected to the vehicle body by at least one or each by a wheel suspension. Preferably, the roll stabilizer is mounted on the vehicle body so as to be rotatable about the stabilizer's axis of rotation. In particular, the actuator housing is rotatable about the stabilizer's axis of rotation relative to the vehicle body. The transverse direction is also referred to, for example, as the vehicle's transverse direction.

[0033] Preferably, the end regions of the stabilizer bars facing away from the actuator are angled. For example, the angled end regions of the stabilizer bars run transversely or obliquely to the stabilizer's axis of rotation. Preferably, the end regions of the stabilizer bars facing away from the actuator are connected to the vehicle wheels, particularly at least indirectly. For example, the end region or one end region of the first stabilizer bar facing away from the actuator is connected to a first of the vehicle wheels, particularly at least indirectly. The end region or one end region of the second stabilizer bar facing away from the actuator is, for example, connected to a second of the vehicle wheels, particularly at least indirectly.

[0034] The adjustable roll stabilizer is preferably provided for a vehicle. For example, the adjustable roll stabilizer is provided on the vehicle or vehicles. The vehicle preferably comprises the vehicle body, the vehicle wheels, and the at least one wheel suspension or suspensions. The vehicle is, in particular, a motor vehicle.

[0035] The invention further relates in particular to a vehicle with a previously described adjustable roll stabilizer, a vehicle body, and two laterally spaced vehicle wheels, which are connected to the vehicle body by at least one or by a wheel suspension each. Preferably, the adjustable roll stabilizer is mounted on the vehicle body so as to be rotatable about the stabilizer's axis of rotation. Preferably, the actuator housing is rotatable about the stabilizer's axis of rotation relative to the vehicle body. The transverse direction is also referred to, for example, as the vehicle's transverse direction. The vehicle is in particular a motor vehicle.

[0036] The vehicle according to the invention can be further developed according to all embodiments described in connection with the adjustable roll stabilizer according to the invention.

[0037] The invention is described below with reference to preferred embodiments and the drawing. The drawing shows: Fig. 1 A schematic view of an adjustable roll stabilizer and of two vehicle wheels arranged side by side in a transverse direction at a distance from each other, which are coupled to each other by the roll stabilizer, Fig. 2 a schematic view of an adjustable roll stabilizer according to a first embodiment, Fig. 3 an enlarged representation of the in Fig. 2 areas marked with “A”, Fig. 4 an enlarged representation of the in Fig. 2 areas marked with “B”, Fig. 5 a schematic circuit diagram of a control unit of the adjustable roll stabilizer according to the first embodiment, Fig. 6 a schematic view of an adjustable roll stabilizer according to a second embodiment, Fig. 7 an enlarged representation of the in Fig. 6 of the area marked “C”, Fig. 8 an enlarged representation of the in Fig. 6 area marked with “D” and Fig. 9 a schematic circuit diagram of a control unit of the adjustable roll stabilizer according to the second embodiment.

[0038] The relevant aspects for all embodiments Fig. Figure 1 shows a schematic view of an adjustable roll stabilizer 1 of a vehicle and two vehicle wheels 2 and 3 arranged side by side at a distance in a transverse direction y of the vehicle. Each wheel is rotatably mounted about a wheel axis on a wheel carrier 4 or 5, respectively. Vehicle wheel 2 is rotatably mounted about wheel axis 6 on wheel carrier 4, and vehicle wheel 3 is rotatably mounted about wheel axis 7 on wheel carrier 5. Each wheel carrier is articulated to a vehicle body 8 (only schematically indicated) by a suspension link, preferably designed as a transverse arm. The roll stabilizer 1 is also mounted on the vehicle body 8. Wheel carrier 4 is articulated to the vehicle body 8 by suspension link 9, and wheel carrier 5 by suspension link 10. Each suspension link is part of a wheel suspension by means of which the respective vehicle wheel is connected to the vehicle body 8.The vehicle wheel 2 is connected to the vehicle body 8 by the wheel suspension 11, and the vehicle wheel 3 is connected to the vehicle body 8 by the wheel suspension 12. Each wheel suspension preferably includes additional components, such as at least one vehicle spring and / or at least one damper and / or at least one tie rod and / or at least one additional suspension link and / or at least one other wheel suspension component. Furthermore, a longitudinal direction x and a vertical direction z are shown.

[0039] The roll stabilizer 1 comprises an actuator 13 and a stabilizer bar 16 divided into two sections 14 and 15. Sections 14 and 15 are connected to each other by the actuator 13 and are rotatable relative to each other about a stabilizer axis of rotation 17. Section 14 is angled at its end facing away from the actuator 13 and connected to the suspension link 9 via a coupling link 18. Section 15 is also angled at its end facing away from the actuator 13 and connected to the suspension link 10 via a coupling link 19. A torque M acting between sections 14 and 15 about the stabilizer axis of rotation 17 is indicated by an arrow and is also referred to, for example, as stabilizer torque. The stabilizer axis of rotation 17 runs in the transverse direction y of the vehicle, which in the context of the roll stabilizer 1 is also simply referred to as the transverse direction.

[0040] A more detailed view of the roll stabilizer 1 according to a first embodiment is shown in Fig. 2 is evident. Furthermore, the Fig. 3 and Fig. 4 the in Fig. 2 marked areas “A” and “B”.

[0041] The actuator 13 comprises an actuator housing 20, which is rigidly connected to the rod half 14. Furthermore, the actuator 13 comprises an actuator shaft 21, rotatable relative to the actuator housing 20 about the stabilizer axis of rotation 17, to which the rod half 15 is connected. The actuator 13 has an actuator motor 22 designed as an electric motor and an actuator gearbox 23, designated as a gearbox, with a drive shaft and an output shaft to which the actuator shaft 21 is connected. Alternatively, the output shaft of the gearbox 23 is formed, for example, by the actuator shaft 21. The electric motor 22 is in Fig. 2 is only schematically indicated and comprises a motor shaft 24 which is rigidly connected to or forms the drive shaft of the gearbox 23. The gearbox 23 comprises, in particular, a planetary gearbox.

[0042] The adjustable roll stabilizer 1 comprises an actuator encoder 25 arranged on a side of the gearbox 23 facing away from the electric motor 22, by means of which a rotation angle Δθ_actuator of the actuator shaft 21 relative to the actuator housing 20 about the stabilizer's axis of rotation 17 can be detected, wherein the actuator encoder 25 has an encoder stator 26 fixedly connected to the actuator housing 20 and an encoder rotor 27 fixedly connected to the actuator shaft 21. The encoder stator 26 is connected to the actuator housing 20 by a connecting rod 28, which is guided through a connecting rod recess 29 extending through the actuator gearbox 23 and the electric motor 22.Thus, the encoder stator 26 is connected to the actuator housing 20 by the coupling rod 28 on the side of the electric motor 22 facing away from the gearbox 23. A control unit 30 is also provided in the actuator housing 20, from which electrical connecting lines 31 and 32 run to the encoder stator 26. A schematic circuit diagram of the control unit is shown in [reference missing]. Fig. 5 is visible.

[0043] The actuator encoder 25 is based on a magnetic measuring principle and, for example, has a magnetic field-sensitive sensor 33 provided on the encoder stator 26 and a sector-shaped magnetized magnet 34 provided on the encoder rotor 27, which is designed, for example, as a ring magnet or partial ring magnet and at least partially surrounds the encoder stator 26, whose sensor 33 preferably projects radially towards the magnet 34. However, other implementations of the magnetic measuring principle are also possible.

[0044] Furthermore, the electric motor 22 is equipped with a motor encoder 35 connected to the control unit 30, by means of which a rotation θ_M of the motor shaft 23 about the stabilizer axis of rotation 17 relative to the actuator housing 20 can be detected.

[0045] The control unit 30 is further connected to the actuator motor 22, so that the latter can be controlled by means of the control unit 30 depending on the rotation angle Δθ_actuator of the actuator shaft 21 relative to the actuator housing 20 and on the rotation angle θ_M of the motor shaft 24 relative to the actuator housing 20.

[0046] From the Fig. 6, Fig. 7 to Fig. Figure 8 shows different views and partial views of an adjustable roll stabilizer 1 according to a second embodiment, wherein features identical or similar to those of the first embodiment are designated with the same reference numerals as in the first embodiment. Furthermore, it shows Fig. Figure 9 shows a schematic circuit diagram of a control unit 30 according to the second embodiment. The illustration is shown in [reference to illustration]. Fig. 1 is also applicable to the second embodiment.

[0047] In contrast to the first embodiment, the actuator encoder 25 is arranged on the side of the electric motor 22 facing away from the gearbox 23 and comprises an encoder stator 26 fixedly connected to the actuator housing 20 and an encoder rotor 27 fixedly connected to the actuator shaft 21.

[0048] The rotary encoder rotor 27 is connected to the actuator shaft 21 by the connecting rod 28, which is guided through the connecting rod recess 29 extending through the actuator gearbox 23 and the electric motor 22. In contrast to the first embodiment, the connecting rod 28 is preferably made of solid material and is rigidly connected to the actuator shaft 21 by means of a fastening device 36.

[0049] According to the second embodiment, the actuator rotary encoder 25 is based on an inductive measuring principle and has, for example, a encoder wheel provided on the rotary encoder rotor 27, which interacts with one or more induction loops 37 provided on the rotary encoder stator 26, which are connected to a rotary encoder operating unit 38, which in turn is connected to the control unit 30.

[0050] Apart from these differences, the second embodiment is identical to the first embodiment, so for a further description of the second embodiment, reference is made to the description of the first embodiment. Reference sign 1 roll stabilizer 2 vehicle wheels 3 vehicle wheel 4 bike carriers 5 bike carriers 6 Wheel pivot 7 Wheel pivot 8 Vehicle body 9 suspension control arms 10 suspension control arms 11 Wheel suspension 12 Wheel suspension 13 Actuator 14 Half of a staff 15 bar half 16 Stabilizer bar 17 Stabilizer pivot axis 18 coupling link 19 coupling link 20 actuator housings 21 Actuator shaft 22 Engine 23 gearboxes 24 Motor shaft 25 actuator rotary encoders 26 Rotary encoder stator 27 Rotary encoder rotor 28 Coupling rod 29 Coupling rod recess 30 control unit 31 Connecting line 32 Connecting line 33 magnetic field-sensitive sensor 34 Magnet 35 Motor rotary encoders 36 Fastening device 37 Induction loop 38 Rotary encoder operating unit Δθ_Actuator Rotation of the actuator shaft relative to the actuator housing θ_M Rotation of the motor shaft relative to the actuator housing QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2006 040 109 A1

[0004]

Claims

Adjustable roll stabilizer (1) with an actuator (13) comprising an actuator housing (20), an actuator motor (22) arranged in the actuator housing (20), an actuator gearbox (23) arranged in the actuator housing (20) and driven by the actuator motor (22), and an actuator shaft (21) rotatable relative to the actuator housing (20) about a stabilizer rotation axis (17) extending in a transverse direction (y), which forms or is connected to an output shaft of the actuator gearbox (23), a stabilizer bar (16) divided into two bar halves (14, 15) connected to each other by the actuator (13), of which a first bar half (14) is connected to the actuator housing (20) and a second bar half (15) is connected to the actuator shaft (21), and an actuator rotary encoder (25) by means of which a rotation angle is measured. (Δθ_actuator) of a reference component connected to or formed by one of the rod halves relative to the actuator housing (20) can be detected,wherein the actuator encoder (25) has an encoder stator (26) connected to the actuator housing (20) and an encoder rotor (27) connected to the reference component, characterized by a coupling rod (28) arranged coaxially with the actuator shaft (21) forming the reference component and guided through a coupling rod recess (29) extending through the actuator drive (23), by means of which the encoder stator (26) is connected to the actuator housing (20) or the encoder rotor (27) is connected to the actuator shaft (21). Adjustable roll stabilizer according to claim 1, characterized in that the coupling rod recess (29) passes through the actuator shaft (21) which is designed as a hollow shaft. Adjustable roll stabilizer according to claim 1 or 2, characterized in that the coupling rod recess (29) extends through the actuator motor (22). Adjustable roll stabilizer according to one of the preceding claims, characterized in that the actuator motor (22) comprises a motor shaft (24) designed as a hollow shaft, through which the coupling rod recess (29) passes. Adjustable roll stabilizer according to one of the preceding claims, characterized in that the coupling rod (28) is connected to the actuator housing (20) in the area of ​​its end facing the first rod half (14) and to the rotary encoder stator (26) in the area of ​​its end facing the second rod half (15). Adjustable roll stabilizer according to claim 5, characterized in that in the transverse direction (y) the rotary encoder (25) is arranged behind the actuator gear (23) and this is arranged behind the actuator motor (22). Adjustable roll stabilizer according to one of claims 1 to 4, characterized in that the coupling rod (28) is connected in the area of ​​its end facing the first rod half (14) to the encoder rotor (27) and in the area of ​​its end facing the second rod half (15) to the actuator shaft (21). Adjustable roll stabilizer according to claim 7, characterized in that in the transverse direction (y) the rotary encoder (25) is arranged in front of the actuator motor (22) and the latter in front of the actuator gearbox (23). Adjustable roll stabilizer according to one of the preceding claims, characterized in that the coupling rod (28) is made of solid material. Adjustable roll stabilizer according to one of claims 1 to 8, characterized in that the coupling rod (28) is designed as a hollow rod in which one or more connecting lines (31, 32) run, by means of which the actuator rotary encoder (25) can be supplied with electrical energy and / or at least one measurement signal provided by the actuator rotary encoder (25) can be transmitted. Adjustable roll stabilizer according to one of the preceding claims, characterized by a control unit (30) connected to the actuator rotary encoder (25), by means of which the actuator motor (22) can be controlled as a function of the rotation angle (Δθ_actuator) of the actuator shaft (21) relative to the actuator housing (20). Adjustable roll stabilizer according to claim 11, characterized in that the actuator motor (22) has a motor encoder (35) connected to the control unit (30), by means of which a rotation angle (θ_M) of the or a motor shaft (24) of the actuator motor (22) relative to the actuator housing (20) can be detected, wherein the actuator motor (22) can additionally be controlled by means of the control unit (30) depending on the rotation angle (θ_M) of the motor shaft (24) relative to the actuator housing (20). Adjustable roll stabilizer according to one of the preceding claims, characterized in that the actuator rotary encoder (25) is based on a magnetic or an inductive measuring principle.

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