Method for Operating a Motor Vehicle, Control Device for a Braking System, and Braking System for a Motor Vehicle

• US 20180345921A1
• Filed: 11/22/2016
• Published: 12/06/2018
• Est. Priority Date: 12/16/2015
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mannherz, Edith, Putzer, Tobias
• Granted Patent: US 10,538,225 B2
• Time in Patent Office: Days
• CPC Class Codes: B60T 2201/10 Automatic or semi-automatic parking aid systems
• CPC Class Codes: B60T 2270/402 Back-up
• CPC Class Codes: B60T 2270/406 Test-mode; Self-diagnosis
• CPC Class Codes: B60T 2270/413 Plausibility monitoring, cross check, redundancy
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B60T 8/885 using electrical circuitry

Abstract

A method for operating a motor vehicle includes carrying out an automated driving process that includes using a first braking device to decelerate the motor vehicle in an automated manner. The method further includes recording at least one operating parameter of the motor vehicle during the automated driving process, and carrying out a check in order to determine whether the at least one operating parameter satisfies a predetermined test criterion. The method also includes decelerating the motor vehicle in an automated manner using a second braking device if the at least one operating parameter does not satisfy the test criterion.

Claims

1. A method for operating a motor vehicle, comprising:

carrying out an automated driving process,

using a first braking device for automated deceleration of the motor vehicle;

detecting, during the automated driving process at least one operating parameter of the motor vehicle;

is detected, wherein

checking a check is carried out as to whether the at least one operating parameter satisfies a specified test criterion; and

automatically decelerating the motor vehicle with a second braking device if the at least one operating parameter does not satisfy the specified test criterion.

2. The method as claimed in claim 1, further comprising:

selecting the at least one operating parameter from a group consisting of a current speed of the motor vehicle, a current acceleration of the motor vehicle, and a current yaw rate of the motor vehicle.

3. The method as claimed in claim 1, wherein the specified test criterion includes at least one of determining (i) whether a current deceleration of the motor vehicle corresponds to a current demand on the first braking device (ii) whether a current speed of the motor vehicle corresponds to the current demand on the first braking device, and (iii) whether the current speed of the motor vehicle is less than a predetermined speed limit for the automated driving process.

4. The method as claimed in claim 1, further comprising:

applying the specified test criterion only if the first braking device is actuated for deceleration of the motor vehicle.

5. The method as claimed in claim 1, further comprising:

applying the specified test criterion independently of a state of the first braking device.

6. The method as claimed in claim 1, further comprising:

monitoring the first braking device for a fault; and

actuating the second braking device if the fault is detected in the first braking device.

7. The method as claimed in claim 1 further comprising:

following actuation of the second braking device, actuating the first braking device in addition.

8. The method as claimed in claim 1, wherein a control unit for a brake system, of the motor vehicle is configured to carrying out the method.

9. A brake system for a motor vehicle comprising:

a first braking device;

a second braking device; and

a control unit operatively connected to the first braking device and the second braking device and configured to carry out a method for operating the brake system including

carrying out an automated driving process;

using the first braking device for automated deceleration of the motor vehicle;

detecting, during the automated driving process, at least one operating parameter of the motor vehicle;

checking whether the at least one operating parameter satisfies a specified test criterion; and

automatically decelerating the motor vehicle with the second braking device if the at least one operating parameter does not satisfy the specified test criterion.

10. The brake system as claimed in claim 9, wherein the second braking device is configured as an automatic parking brake device.