METHOD FOR OPERATING A MOTOR VEHICLE AND CORRESPONDING MOTOR VEHICLE

Abstract

A method for operating a motor vehicle, the motor vehicle has a drive device and multiple X-by-wire control devices. A central computer of the motor vehicle determines an overall status from status messages transmitted by the control devices and controls the drive device and/or the control devices on the basis of the overall status.

Claims

1-10. (canceled)

11. A method for operating a motor vehicle, wherein the motor vehicle has a drive device and multiple X-by-wire control devices, wherein a central computer of the motor vehicle determines an overall status from status messages transmitted by the control devices and controls the drive device and/or the control devices based on the overall status.

12. The method according to claim 11, wherein each of the control devices carries out a self-diagnosis and, based on a result of the self-diagnosis, determines a control device state and/or a residual running variable of the motor vehicle, which is transmitted to the central computer as part of the respective status message.

13. The method according to claim 11, wherein the control devices are supplied with electrical power by means of a power supply device, wherein the power supply device carries out a self-diagnosis and, based on a result of the self-diagnosis, determines a power supply device state and/or a further residual running variable of the motor vehicle, which is transmitted to the central computer as part of a further status message, wherein the central computer takes the further status message into account when determining the overall status.

14. The method according to claim 11, wherein the overall status comprises an overall state which is determined on the basis of the control device states and/or the power supply device state, and/or in that the overall status comprises an overall residual running variable which is determined on the basis of the residual running variables and/or the further residual running variable.

15. The method according to claim 11, wherein the overall state is set to a first overall state value if the control device states have values that correspond to functional control devices and/or the power supply device state has a value that corresponds to a functional power supply device and/or in that the overall state is set to a second overall state value if one of the control device states has a value that corresponds to a non-functional control device and/or the power supply device state has a value that corresponds to a non-functional power supply device.

16. The method according to claim 11, wherein the overall residual running variable is set to the smallest value of the residual running variables and/or the further residual running variable.

17. The method according to claim 11, wherein the self-diagnosis of the control devices and the transmission of the status messages to the central computer take place when the drive device is deactivated and activation of the drive device is only permitted if the determined overall state has the first overall state value and/or the overall residual running variable has not yet expired, and/or in that the self-diagnosis of the control devices and the transmission of the status messages to the central computer take place when the drive device is activated and the drive device and/or the control devices are controlled to stop the motor vehicle if the determined overall state has the second overall state value and/or the overall residual running variable has expired.

18. The method according to claim 11, wherein a plurality of the following devices are used as control devices: brake-by-wire control device, steer-by-wire control device and shift-by-wire control device.

19. The method according to claim 11, wherein the overall status is displayed to a user of the motor vehicle by means of a display device.

20. A motor vehicle, in particular for carrying out the method according to claim 11, wherein the motor vehicle has a drive device and multiple X-by-wire control devices, wherein a central computer of the motor vehicle is provided and designed to determine an overall status from status messages transmitted by the control devices and to control the drive device and/or the control devices on the basis of the overall status.

21. The method according to claim 12, wherein the control devices are supplied with electrical power by means of a power supply device, wherein the power supply device carries out a self-diagnosis and, based on a result of the self-diagnosis, determines a power supply device state and/or a further residual running variable of the motor vehicle, which is transmitted to the central computer as part of a further status message, wherein the central computer takes the further status message into account when determining the overall status.

22. The method according to claim 12, wherein the overall status comprises an overall state which is determined on the basis of the control device states and/or the power supply device state, and/or in that the overall status comprises an overall residual running variable which is determined on the basis of the residual running variables and/or the further residual running variable.

23. The method according to claim 13, wherein the overall status comprises an overall state which is determined on the basis of the control device states and/or the power supply device state, and/or in that the overall status comprises an overall residual running variable which is determined on the basis of the residual running variables and/or the further residual running variable.

24. The method according to claim 12, wherein the overall state is set to a first overall state value if the control device states have values that correspond to functional control devices and/or the power supply device state has a value that corresponds to a functional power supply device and/or in that the overall state is set to a second overall state value if one of the control device states has a value that corresponds to a non-functional control device and/or the power supply device state has a value that corresponds to a non-functional power supply device.

25. The method according to claim 13, wherein the overall state is set to a first overall state value if the control device states have values that correspond to functional control devices and/or the power supply device state has a value that corresponds to a functional power supply device and/or in that the overall state is set to a second overall state value if one of the control device states has a value that corresponds to a non-functional control device and/or the power supply device state has a value that corresponds to a non-functional power supply device.

26. The method according to claim 14, wherein the overall state is set to a first overall state value if the control device states have values that correspond to functional control devices and/or the power supply device state has a value that corresponds to a functional power supply device and/or in that the overall state is set to a second overall state value if one of the control device states has a value that corresponds to a non-functional control device and/or the power supply device state has a value that corresponds to a non-functional power supply device.

27. The method according to claim 12, wherein the overall residual running variable is set to the smallest value of the residual running variables and/or the further residual running variable.

28. The method according to claim 13, wherein the overall residual running variable is set to the smallest value of the residual running variables and/or the further residual running variable.

29. The method according to claim 14, wherein the overall residual running variable is set to the smallest value of the residual running variables and/or the further residual running variable.

30. The method according to claim 15, wherein the overall residual running variable is set to the smallest value of the residual running variables and/or the further residual running variable.

Description

BRIEF DESCRIPTION OF THE FIGURE(S)

[0038] In the following, the invention will be explained in greater detail with reference to the exemplary embodiments depicted in the drawings, without this limiting the invention. In particular, the only

[0039] Figure is a schematic representation of a motor vehicle having a drive device and multiple X-by-wire control devices.

[0040] Figure shows a schematic representation of a motor vehicle 1. The motor vehicle 1 has a display device 2 which is arranged in an interior, in particular in a passenger compartment, of the motor vehicle 1. Preferably, the display device 2 is located on a dashboard of the motor vehicle 1. Furthermore, the motor vehicle 1 has a drive device 3 and a driver assistance device 4. Furthermore, a power supply device 5 and multiple X-by-wire control devices 6 are part of the motor vehicle. A plurality of the control devices 6 are present as brake-by-wire control devices 7 and a plurality as steer-by-wire control devices 8. The control devices 6 are therefore designed redundantly.

[0041] The control devices 6 and the power supply device 5 each carry out a self-diagnosis and transmit the result of this self-diagnosis as part of a status message to a central computer 9, which is also part of the motor vehicle 1. The central computer 9 determines an overall status from the individual status messages of the control devices 6 and the power supply device 5 and controls the drive device 3 and/or the control devices 6 depending on the overall status. In addition, it can be provided to display the overall status to a user of the motor vehicle 1 by means of the display device 2.

[0042] The control is carried out in such a way that the drive device 3 is either released for activation or activation is prevented depending on the overall status. Activation means preparing for the provision of a drive torque aimed at driving the motor vehicle. If the activation of the drive device 3 is prevented, it cannot provide the drive torque, so that the motor vehicle 1 remains at a standstill. If the motor vehicle 1 is already in motion, depending on the overall status, the driver assistance device 4 may be controlled to brake the motor vehicle 1. For this purpose, the driver assistance device 4 in turn controls the corresponding control devices 6, more precisely the brake-by-wire control devices 7. Preferably, not only one of the brake-by-wire control devices 7, but multiple, in particular all, of the brake-by-wire control devices 7 are controlled for braking the vehicle 1. This ensures reliable operation of the motor vehicle 1.

LIST OF REFERENCE NUMERALS

[0043] 1 motor vehicle [0044] 2 display device [0045] 3 drive device [0046] 4 driver assistance device [0047] 5 power supply device [0048] 6 X-by-wire control device [0049] 7 brake-by-wire control device [0050] 8 steer-by-wire control device [0051] 9 central computer