Method and device for operating a motor vehicle, and a motor vehicle

Patent metadata

Field	Value
Publication number	US-2016200218-A1
Application number	US-201514978133-A
Country	US
Kind code	A1
Filing date	Dec 22, 2015
Priority date	Jan 8, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

The invention relates to a method for operating a motor vehicle ( 1 ) which has at least one electric machine ( 7 ) which can be/is operatively connected to at least one driven wheel ( 6 ) of the motor vehicle ( 1 ), and a safety device ( 13 ) which is assigned to a driven wheel ( 6 ), is independent of the electric machine ( 7 ) and when necessary applies a positive or negative torque to the driven wheel ( 6 ), wherein the electric machine ( 7 ) is operated by an inverter ( 8 ). There is provision that the inverter ( 8 ) is monitored for incorrectly set torques, and that the safety device ( 13 ) is actuated as a function of a detected incorrect torque.

First claim

1 . A method for operating a motor vehicle ( 1 ) which has at least one electric machine ( 7 ) which is configured to be operatively connected to at least one driven wheel ( 6 ) of the motor vehicle ( 1 ), and a safety device ( 13 ) which is assigned to a driven wheel ( 6 ), is independent of the electric machine ( 7 ) and when necessary applies a positive or negative torque to the driven wheel ( 6 ), the method comprising operating the electric machine ( 7 ) by an inverter ( 8 ), monitoring the inverter ( 8 ) for incorrectly set torques, and actuating the safety device ( 13 ) as a function of a detected incorrect torque.

2 . The method according to claim 1 , characterized in that the safety device ( 13 ) is actuated to compensate for the incorrect torque.

3 . The method according to claim 1 , characterized in that a brake device ( 11 ) which is assigned to the driven wheel ( 6 ) is activated as a safety device ( 13 ).

4 . The method according to claim 3 , characterized in that the brake device ( 11 ) is actuated with a delay with respect to the detection of the incorrect torque.

5 . The method according to claim 4 , characterized in that the delay is determined as a function of inertia of the drive train of the electric machine ( 7 ) up to the driven wheel ( 6 ).

6 . The method according to claim 1 , characterized in that a drive machine which can be operated independently of the electric machine ( 7 ) is actuated as a safety device ( 13 ) in order to generate a positive torque.

7 . The method according to claim 1 , characterized in that an internal combustion engine ( 3 ) or a further electric machine is actuated as a further drive machine.

8 . A device for operating a motor vehicle ( 1 ) which has at least one electric machine ( 7 ) which is configured to be operatively connected to at least one driven wheel ( 6 ) of the motor vehicle ( 1 ) and is operated by an inverter ( 8 ), and a safety device ( 13 ) which is independent of the electric machine ( 7 ) and which when necessary applies a positive or negative torque to the driven wheel ( 6 ), also comprising a control device ( 9 ) configured to carry out the method according to claim 1 .

9 . A motor vehicle ( 1 ) having at least one electric machine ( 7 ) which is configured to be operatively connected to at least one driven wheel ( 6 ), a safety device ( 13 ) which is assigned to the driven wheel ( 6 ), can be operated independently of the electric machine ( 7 ) and when necessary applies a positive or negative torque to the driven wheel ( 6 ), an inverter ( 8 ) which is assigned to the electric machine ( 7 ), and a device according to claim 8 .

Assignees

• Bosch Gmbh Robert

Inventors

• Tornow Henrik
• Maur Marcel
• Kopp Thomas

Classifications

• B60L15/20 Primary

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• B60L3/0061

  relating to electrical machines · CPC title

• B60L3/12

  Recording operating variables {; Monitoring of operating variables} · CPC title

• B60L2240/423

  Torque · CPC title

• B60L7/26

  Controlling the braking effect · CPC title