Roll stabilizer for a motor vehicle

Abstract

An electromechanical roll stabilizer for a motor vehicle includes a housing, a rotor position sensor board, and an actuator torque sensor board. The housing has a motor unit that has a stator and a rotor integrated therein. The rotor position sensor board and the actuator torque sensor board are arranged between two stabilizer halves. The actuator torque sensor board has a digitization and transmission unit for digitizing the sensed torque and transmitting the digitized torque to a data forwarding module arranged on the rotor position sensor board. The rotor position sensor board has a rotor position detection unit for sensing and digitizing the rotor position and a data processing unit. The sensing of the rotor position can be triggered by at least one command signal of a controller to the rotor position detection unit. The data processing unit is provided to process the sensed measured values.

Claims

1. An electromechanical roll stabilizer for a motor vehicle, comprising: a first stabilizer half; a second stabilizer half; a housing having a motor unit that includes a stator, a rotor, and an output shaft connected to the rotor, wherein the output shaft is at least indirectly connected to the second stabilizer half; a rotor position sensor circuit board configured to detect at least one rotor position, the rotor position sensor circuit board having a data forwarding module; an actuator torque sensor circuit board arranged between the first stabilizer half and the second stabilizer half and configured to (i) detect torque between the first stabilizer half and the second stabilizer half, and (ii) transmit the detected torque to the data forwarding module of the rotor position sensor circuit board; and a processor configured to process the detected rotor position, wherein the processor and the data forwarding module are connected to a communications module in order to forward the detected torque from the data forwarding module to the communications module, wherein the communications module is configured to (i) transmit the detected torque to a controller, and (ii) transmit command signals from the controller to detect the at least one rotor position via the rotor position sensor circuit board.

2. The electromechanical roll stabilizer of claim 1, wherein the rotor position sensor circuit board further has a temperature sensor configured to detect a temperature of the rotor.

3. The electromechanical roll stabilizer of claim 2, wherein the temperature sensor is configured to continuously detect the temperature of the rotor and the processor is configured to utilize the rotor position sensor circuit board to selectively detect the at least one rotor position.

4. The electromechanical roll stabilizer of claim 2, further comprising a rotor position transmitter arranged at a sensor-side end of the output shaft, wherein the rotor position sensor circuit board detects the at least one rotor position via interaction with the rotor position transmitter.

5. The electromechanical roll stabilizer of claim 2, further comprising a first holding element arranged on the motor unit and configured to at least partially receive the rotor position sensor circuit board, wherein the first holding element is at least indirectly connected to the motor unit in a rotationally fixed manner.

6. The electromechanical roll stabilizer of claim 5, further comprising a second holding element arranged on the first stabilizer half and configured to at least partially receive the actuator torque sensor circuit board, wherein the second holding element is at least indirectly connected to the first stabilizer half in a rotationally fixed manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further measures will be explained in more detail below together with the description of exemplary embodiments with reference to the five figures, wherein identical or similar elements are provided with the same reference symbol, where

(2) FIG. 1 shows a schematic view of a roll stabilizer according to an embodiment,

(3) FIG. 2 shows a simplified schematic partially sectioned illustration in the region of a housing of the roll stabilizer according to an embodiment,

(4) FIG. 3 shows a simplified schematic sectional illustration for explaining the structure of a rotor position sensor circuit board of the roll stabilizer according to an embodiment.

(5) FIG. 4 shows a simplified schematic sectional illustration for explaining the structure of an actuator torque sensor circuit board of the roll stabilizer according to an embodiment, and

(6) FIG. 5 shows a schematic block diagram for explaining a sensor arrangement of the roll stabilizer according to an embodiment.

DETAILED DESCRIPTION

(7) According to FIG. 1, an electromechanical roll stabilizer 1 for a motor vehicle—not illustrated here—comprises a first stabilizer half 2a and a second stabilizer half 2b, which stabilizer halves can be connected to one another via a housing 3, which is arranged between the two stabilizer halves 2a, 2b, and a motor unit 4 which is arranged within the housing 3. The roll stabilizer 1 is arranged transversely to the vehicle longitudinal axis and, at its free ends, is connected to the wheels or wheel carriers—not illustrated here.

(8) According to FIG. 2, the housing 3 of the roll stabilizer 1 is illustrated in a partially sectioned manner. The motor unit 4 has a stator 5 and a rotor 6, wherein the rotor 6 is connected in an interlocking manner to an output shall 9. The output shall 9 has, on the sensor side, a free end and is connected in a rotationally fixed manner to the second stabilizer half on the opposite side of the motor unit 4 at a second end—not illustrated here. A sensor arrangement 21 is further arranged within the housing 3, said sensor arrangement having a rotor position sensor circuit board 7 for indirectly detecting at least one rotor position and also having an actuator torque sensor circuit board 8 for indirectly detecting a torque and for directly detecting a motor temperature.

(9) FIG. 3 illustrates the rotor position sensor circuit board 7 of the sensor arrangement 21 of the roll stabilizer 1 according to the embodiment shown in FIG. 1. The rotor position sensor circuit board 7 comprises a carrier element 22 on which a rotor position detection unit 10 for sensing the rotor position and also a data processing unit 12 for processing and forwarding digitized measurement variables are arranged. An interface 19 for temperature detection, a data forwarding module 13 and a communications module 14 are further arranged on the carrier element 22. In the present case, the rotor position sensor circuit board 7 is connected to a first holding element 17 via two webs 23. The first holding element 17 is connected to the motor unit 4 and provided for receiving the rotor position sensor circuit board 7. A rotor position transmitter 16 is arranged axially opposite the rotor position detection unit 10 at the sensor-side end of the output shaft 9. Owing to rotation of the output shaft 9 and therefore also the rotor position transmitter 16, the rotor position detection unit 10 can detect tire relative rotor position between the rotor position detection unit 10 and the rotor position transmitter 16 for determining the rotor position. In addition, the rotor position sensor circuit board 7 can have further interfaces in order to be able to be connected to additional circuit boards—not illustrated here—for sensing physical measurement variables.

(10) FIG. 4 illustrates the actuator torque sensor circuit board 8 of the sensor arrangement 21. A second holding element 18 for receiving the actuator torque sensor circuit board 8 is arranged on the first stabilizer half 2a, wherein the second holding element 18 is connected in a rotationally fixed manner to the first stabilizer half 2a. The actuator torque sensor circuit board 8 comprises a earner element 24 on which a torque sensor 20 for sensing the torque between the two stabilizer halves 2a, 2b and a digitization and transmission unit 11 for digitizing the sensed torque are arranged. In addition, the actuator torque sensor circuit board 8 can have further interfaces in order to be connected to additional circuit boards for sensing physical measurement variables.

(11) FIG. 5 shows the sensor arrangement 21 in the form of a block diagram. The measurement variables of the torque which are sensed by the torque sensor 20 and digitized via the digitization and transmission unit 11 are forwarded to the data forwarding module 13 via a first data stream 25a. The data processing unit 12 optionally receives measurement variables which are optionally measured by the rotor position detection unit 10 and the interlace 19 and are detected in the form of voltages or changes in voltage or else as electrical signals, and digitized. The rotor position which is digitally measured by the rotor position detection unit 10 is depacketized and processed in the data processing unit 12 and converted to form a rotor acceleration and a rotor speed and digitized again. The measurement variables of the interface 19 are further digitized in the data processing unit 12 for forwarding purposes. It is possible to determine and to monitor the torque between the two stabilizer halves 2a, 2b via the torque sensor 20. The temperature sensor 19 is provided for detecting and monitoring a motor temperature. The data forwarding module 13 is provided for directly forwarding, without processing, the measurement variables of the torque which is measured in the actuator torque sensor circuit board 8. The digitized and/or processed measurement variables of the data processing unit 12 and the digitized measurement variables of the data forwarding module 13 are then transmitted to the communications module 14 and combined there.

(12) The communications module 14 is provided for receiving the digitized and/or processed measurement variables of the data processing unit 12 and of the data forwarding module 13 and for forwarding said measurement variables to a controller 15 via a second data stream 25b. In the present case, the controller 15 is arranged outside the roll stabilizer 1 and is connected to the communications module 14 via a cable connection for example. The communications module 14 receives command signals from the controller 15 via a first command data stream 26a. The command signals are sent to the rotor position detection unit 10 at specific and predefined times directly via the communications module 14 and the data processing unit 12 along a second and third command data stream 26b, 26c. The command signals cause the rotor position to be measured at desired times via the rotor position detection unit 10, wherein the digital rotor position is transmitted to the controller via the data forwarding module 13 and the communications module 14. The time-dependent rotor acceleration and rotor speed are further optionally calculated in the data processing unit 12 from the digitized time-independent measurement variables of the rotor position. In addition, it is conceivable for a further command signal to be passed to the torque sensor 20 via the communications module 14 and the data forwarding module 13 in order to trigger a measurement of the torque at a specific time or at several defined times.

(13) Furthermore, the first command data stream 26a of the controller 15 optionally triggers a measurement of the torque, wherein the first command data stream 26a is passed along a first and second torque command data stream 27a, 27b via the communications module 14 and the data forwarding module in this ease. Therefore, a measurement of the torque via the torque sensor 20 can be triggered by every command signal of the controller 15.

LIST OF REFERENCE SYMBOLS

(14) 1 Roll stabilizer

(15) 2a, 2b Stabilizer half

(16) 3 Housing

(17) 4 Motor unit

(18) 5 Stator

(19) 6 Rotor

(20) 7 Rotor position sensor circuit board

(21) 8 Actuator torque sensor circuit board

(22) 9 Output shaft

(23) 10 Rotor position detection unit

(24) 11 Digitization and transmission unit

(25) 12 Data processing unit

(26) 13 Data forwarding module

(27) 14 Communications module

(28) 15 Controller

(29) 16 Rotor position transmitter

(30) 17 First holding element

(31) 18 Second holding element

(32) 19 Interface

(33) 20 Torque sensor

(34) 21 Sensor arrangement

(35) 22 Carrier element

(36) 23 Web

(37) 24 Carrier element

(38) 25a, 25b Data stream

(39) 26a, 26b, 26c Command data stream

(40) 27a, 27b Torque command data stream