Control device for an autonomous power braking system of a vehicle and method for operating an autonomous power braking system of a vehicle

Patent metadata

Field	Value
Publication number	US-2016167629-A1
Application number	US-201414891071-A
Country	US
Kind code	A1
Filing date	May 5, 2014
Priority date	May 15, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

A control device for an autonomous power braking system of a vehicle includes: an activation unit configured to (i) output a pump control signal to a pump of the braking system, taking into consideration a supplied presetting signal regarding an autonomous braking pressure buildup to be carried out, in such a way that a braking pressure in a wheel braking cylinder is increased by the activated pump, and (ii) output a brake booster control signal to an active brake booster of the braking system, taking the presetting signal into consideration, in such a way that a boosting force is exerted on at least one adjustable piston of a master brake cylinder of the braking system by the active brake booster in such a way that the braking pressure in the wheel brake cylinder is increased via an increased internal pressure in the master brake cylinder.

First claim

1 - 13 . (canceled)

14 . A control device for an autonomous power braking system of a vehicle, comprising:
an activation unit configured to: output at least one pump control signal to at least one pump of the braking system, taking into consideration a supplied presetting signal with respect to an autonomous braking pressure buildup to be carried out in at least one wheel brake cylinder of the braking system, in such a way that a braking pressure in the at least one wheel brake cylinder is increased with the aid of the at least one pump activated by the at least one pump control signal; and output at least one brake booster control signal to an active brake booster of the braking system, taking the presetting signal into consideration, in such a way that a boosting force is exerted on at least one adjustable piston of a master brake cylinder of the braking system with the aid of the active brake booster activated by the at least one brake booster control signal in such a way that the braking pressure in the at least one wheel brake cylinder is increased with the aid of an internal pressure in the master brake cylinder which is increased as a result of the at least one adjustable piston.

15 . The control device as recited in claim 14 , wherein the activation unit is configured to jointly activate the active brake booster with the aid of the at least one brake booster control signal and the at least one pump with the aid of the at least one pump control signal in such a way that the braking pressure in the at least one wheel brake cylinder is autonomously increased.

16 . The control device as recited in claim 15 , wherein the activation unit is configured to jointly activate the active brake booster with the aid of the at least one brake booster control signal and the at least one pump with the aid of the at least one pump control signal in such a way that the braking pressure in the at least one wheel brake cylinder is autonomously increased for one of a driver assistance function or an emergency brake application.

17 . The control device as recited in claim 15 , wherein the activation unit is configured to activate an electromechanical brake booster as the active brake booster with the aid of the at least one brake booster control signal.

18 . The control device as recited in claim 15 , wherein the activation unit is configured to operate the at least one pump and the active brake booster simultaneously.

19 . The control device as recited in claim 15 , wherein the activation unit is configured to operate the active brake booster and the at least one pump consecutively in such a way that the braking pressure in the at least one wheel brake cylinder is first increased from a starting pressure to an intermediate pressure exclusively with the aid of the active brake booster activated by the at least one brake booster control signal, and then from the intermediate pressure to a higher pressure exclusively with the aid of the at least one pump activated by the at least one pump control signal.

20 . The control device as recited in claim 15 , wherein the activation unit is configured to receive the presetting signal from at least one of an external driver assistance device and an external emergency braking device.

21 . The control device as recited in claim 15 , wherein the control device is configured as at least one of a driver assistance device and an emergency braking device.

22 . A method for operating an autonomous power braking system of a vehicle, comprising:
at least partially carrying out an autonomous braking pressure buildup in at least one wheel brake cylinder of the braking system by (i) operating at least one pump of the braking system in such a way that a braking pressure in the at least one wheel brake cylinder is increased with the aid of the operated at least one pump; and (ii) additionally operating an active brake booster of the braking system in such a way that a boosting force is exerted on at least one adjustable piston of a master brake cylinder of the braking system with the aid of the active brake booster in such a way that the braking pressure in the at least one wheel brake cylinder is increased with the aid of an internal pressure in the master brake cylinder which is increased as a result of the at least one adjusted piston.

23 . The method as recited in claim 22 , wherein the at least one pump and the active brake booster are operated simultaneously.

24 . The method as recited in claim 22 , wherein the active brake booster and the at least one pump are operated consecutively in such a way that the braking pressure in the at least one wheel brake cylinder is first increased from a starting pressure to an intermediate pressure exclusively with the aid of the active brake booster, and then from the intermediate pressure to a higher pressure exclusively with the aid of the at least one pump.

25 . The method as recited in claim 23 , wherein one of a driver assistance function or an emergency brake application is carried out with the aid of the joint operation of the active brake booster and the at least one pump.

Assignees

• Bosch Gmbh Robert

Inventors

• Bunk Michael

Classifications

• B60T11/10

  transmitting by fluid means, e.g. hydraulic · CPC title

• B60T7/12 Primary

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• B60T13/66

  Electrical control in fluid-pressure brake systems · CPC title

• B60T13/745

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

• B60T8/4845

  using a booster or a master cylinder for traction control · CPC title