Method and device for operating a braking system of a motor vehicle, braking system

Patent metadata

Field	Value
Publication number	US-10427659-B2
Application number	US-201715699819-A
Country	US
Kind code	B2
Filing date	Sep 8, 2017
Priority date	Nov 10, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A method for operating a braking system of a motor vehicle with at least one hydraulically actuable wheel brake, a brake actuation device for hydraulically actuating the wheel brake, an electric brake booster for setting a predefinable hydraulic braking boost, and at least one parking brake assembly includes monitoring the motor vehicle to detect standstill and monitoring the parking brake assembly to detect activation thereof. The method further includes reducing a braking boost set by the brake booster if standstill of the motor vehicle has been detected and an activation of the parking brake assembly has been detected.

First claim

What is claimed is:

1. A method for operating a braking system of a motor vehicle, the braking system including at least one hydraulically actuable wheel brake, a brake actuation device for hydraulically actuating the wheel brake, an electric brake booster for setting a predefinable hydraulic braking boost, and at least one parking brake assembly, the method comprising:
monitoring the motor vehicle to detect standstill;
monitoring the parking brake assembly to detect an activation thereof; and
reducing a braking boost set by the brake booster if the standstill of the motor vehicle has been detected and the activation of the parking brake assembly has been detected,
wherein the activation of the parking brake assembly is determined in dependence on an operating state of an electric actuator of the parking brake assembly, the actuator configured to generate a locking brake force of the parking brake assembly.

2. The method according to claim 1 , wherein the braking boost is completely canceled if the standstill of the motor vehicle has been detected and the activation of the parking brake assembly has been detected.

3. The method according to claim 1 , wherein the braking boost is reduced only if it is detected that a drive assembly of the motor vehicle is switched off.

4. The method according to claim 1 , wherein the braking boost is reduced only if the activation of the parking brake assembly is detected continuously for a predefined time period.

5. The method according to claim 1 , wherein, even if the braking boost is reduced, a hydraulic pressure configured to generate or increase a braking force of the wheel brake is generated in dependence on an actuation of the brake actuation device.

6. The method according to claim 3 , wherein the drive assembly is an internal combustion engine of the motor vehicle.

7. A control device for operating a braking system of a motor vehicle, the braking system including at least one hydraulically actuable wheel brake, a brake actuation device for hydraulically actuating the wheel brake, an electric brake booster for setting a predefinable hydraulic braking boost, and a parking brake assembly having an electric actuator associated with the wheel brake and separately actuable from the hydraulic actuation of the wheel brake, the control device specifically-configured to:
monitor the motor vehicle to detect standstill;
monitor the parking brake assembly to detect an activation of the parking brake assembly via the electric actuator; and
reduce a braking boost set by the brake booster if the standstill of the motor vehicle has been detected and the activation of the parking brake assembly has been detected.

8. A braking system for a motor vehicle, comprising:
at least one hydraulically actuable wheel brake;
a brake actuation device configured to hydraulically actuate the wheel brake;
an electric brake booster configured to set a predefinable hydraulic braking boost;
a parking brake assembly integrated with a housing of the wheel brake and configured to separately actuate the wheel brake; and
a control device configured to carry out a method for operating the braking system, the control device specifically-configured to:
monitor the motor vehicle to detect standstill,
monitor the parking brake assembly to detect an activation thereof, and
reduce a braking boost set by the brake booster if the standstill of the motor vehicle has been detected and the activation of the parking brake assembly has been detected.

9. The braking system according to claim 8 , wherein the parking brake assembly has an electric-motor driven actuator configured to actuate the wheel brake.

Assignees

• Bosch Gmbh Robert

Inventors

• Blattert Dieter
• Mannherz Edith
• Wolff Helmut

Classifications

• B60T13/745 Primary

  acting on a hydraulic system, e.g. a master cylinder · CPC title

• B60T8/32 Primary

  responsive to a speed condition, e.g. acceleration or deceleration ({using electrical circuitry or regulation means B60T8/17} ; B60T8/28 takes precedence; electric devices on electrically propelled vehicles indicating the wheel slip B60L3/10; measuring linear or angular speed per se G01P3/00) · CPC title

• B60T2201/06

  Hill holder; Start aid systems on inclined road · CPC title

• B60T8/172

  Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters {(B60T8/17551 takes precedence)} · CPC title

• B60T8/3265

  with control of the booster (B60T8/3275 takes precedence) · CPC title