Method for operating an electromagnetic actuator in a motor vehicle

Patent metadata

Field	Value
Publication number	US-2016229250-A1
Application number	US-201415024665-A
Country	US
Kind code	A1
Filing date	Jul 26, 2014
Priority date	Sep 25, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

A method for operating an actuator of a torsion bar system of a wheel suspension of a motor vehicle is disclosed. The actuator is mounted on a carrier structure of the vehicle and actuation of the actuator changes a pre-tension acting on a wheel guide element of the wheel suspension. The method includes controlling an active aggregate support so as to reduce a vibration of a drive aggregate supported on the carrier structure via the active aggregate support adjacent to the actuator; and controlling the active aggregate support for reducing an operational vibration of the actuator.

First claim

What is claimed is:

1 .- 12 . (canceled)

13 . A method for operating an actuator of a torsion bar system of a wheel suspension of a motor vehicle, wherein said actuator is mounted on a carrier structure of the vehicle and wherein actuation of the actuator changes a pre-tension acting on a wheel guide element of the wheel suspension, said method comprising:
controlling an active aggregate support so as to reduce a vibration of a drive aggregate supported on the carrier structure via the active aggregate support adjacent to the actuator; and controlling the active aggregate support for reducing an operational vibration of the actuator.

14 . The method of claim 13 , further comprising detecting with a control unit the vibration of the drive aggregate occurring during a drive as a first actual interfering signal, generating with the control unit a first actuating signal as a function of the first actual interfering signal, and controlling an actuating system of the active aggregate support with the first actuating signal for reducing the first interfering signal.

15 . The method of claim 14 , further comprising detecting with the control unit an operational vibration of the actuator as a second actual interfering signal, generating with the control unit a second actuating signal, and controlling an actuating system of the active aggregate support with the second actuating signal for reducing the second interfering signal.

16 . The method of claim 13 , further comprising superimposing with the aggregate support a counter vibration of the drive aggregate over the operational vibration of the actuator.

17 . The method of claim 15 , further comprising superimposing the first and second actuating signals over each other in a parallel operation.

18 . The method of claim 15 , wherein the first actuating signal is a low-frequency counter vibration of the drive aggregate vibration and the second actuating signal is a high-frequency counter vibration of the operational vibration of the electromechanical actuator.

19 . The method of claim 13 , further comprising analyzing with the control unit a signal of at least one vibration sensor assigned to the actuator, for controlling the aggregate supports.

20 . The method of claim 13 , wherein the control unit is a motor control unit in which driving dynamic and aggregate-specific parameters are detected and wherein the active aggregate support is controlled as a function of the driving dynamic and aggregate-specific parameters.

21 . The method of claim 13 , wherein the controlling of the aggregate support is determined empirically in dependence on a control signal of the electromechanical actuator and is stored in the control unit.

22 . A device, comprising:
an electromechanical actuator, said actuator being part of a torsion bar system of a wheel suspension of a motor vehicle and being mounted on a carrier structure of the motor vehicle, wherein actuation of the actuator changes a pre-tension acting on a wheel guide element of the wheel suspension; an active aggregate support for supporting a drive aggregate of the motor vehicle, said active aggregate support being arranged on the carrier structure of the vehicle in close proximity to the actuator, said active aggregate support being adapted for active adjustment of damping characteristics of the active aggregate support; and a control unit adapted for controlling the active aggregate support so as to damping an operational vibration of the actuator.

23 . The device of claim 22 , further comprising at least one vibration sensor provided on the electromechanical actuator, said control unit being adapted for receiving signals generated by the vibration sensor, and for controlling the aggregate support based on the signals generated by the at least one vibration sensor.

24 . The device of claim 22 , wherein the electromechanical actuator comprises an electric motor and at least one transmission, said electric motor and said at least one transmission acting on at least one torsion bar so as to change a pre-tension of the at least one torsion bar, said device further comprising a vibration sensor for each said electromechanical actuator, said vibration sensor being connected with the control unit.

25 . The device of claim 23 , further comprising two said vibration sensor, wherein the control unit is adapted for analyzing the signals of the two vibration sensors separate from each other and to only control a respective one of the aggregate supports closest to the respective actuator.

26 . The device of claim 22 , wherein the electromechanical actuator or the torsion bar system is fixedly connected with the carrier structure, and wherein the drive aggregate is at least partially supported on the carrier structure via the active aggregate support.

27 . The device of claim 22 , wherein the electromechanical actuator or the is screwed to the carrier structure.

28 . The device of claim 26 , wherein the carrier structure is a subframe of the motor vehicle.

Assignees

• Audi Ag

Inventors

• Schmitt Joachim

Classifications

• B60G2202/442

  Rotary actuator · CPC title

• B60G2800/87

  System configuration based on vehicle type or model · CPC title

• B60G2204/18

  Mounting of vehicle engines · CPC title

• B60G21/0555

  including an actuator inducing vehicle roll · CPC title

• B60K5/1283

  Adjustable supports, e.g. the mounting or the characteristics being adjustable · CPC title