Electromechanical brake actuator (emb) for a friction brake of a vehicle and a method for operating such a brake actuator

Patent metadata

Field	Value
Publication number	US-2025242788-A1
Application number	US-202418918324-A
Country	US
Kind code	A1
Filing date	Oct 17, 2024
Priority date	Jan 31, 2024
Publication date	Jul 31, 2025
Grant date	—

Abstract

A method for operating an electromechanical brake actuator (EMB) for a friction brake of a vehicle. A locking actuator of the EMB is controlled to lock the mechanics of the EMB when a drive of the EMB has moved the mechanics to a braking position and a standstill of the friction brake is detected.

First claim

What is claimed is:

1 . A method for operating an electromechanical brake actuator (EMB) for a friction brake of a vehicle, the method comprising the following:
controlling a locking actuator of the EMB to lock mechanics of the EMB when a drive of the EMB has moved the mechanics to a braking position and a standstill of the friction brake is detected.

2 . The method according to claim 1 , wherein a driving force generated by the drive is at least reduced in response to the locking of the mechanics.

3 . The method according to claim 2 , in which the drive is de-energized in response to the locking of the mechanics.

4 . The method according to claim 1 , wherein the mechanics are unlocked in response to an actuation of an accelerator pedal of the vehicle.

5 . The method according to claim 4 , wherein the drive is controlled in response to the unlocking of the mechanics to move the mechanics to a starting position.

6 . The method according to claim 4 , wherein, to unlock the mechanics, the drive is controlled to move the mechanics in a forward direction at least around an undercut of a latching device for the locking actuator.

7 . The method according to claim 6 , wherein, when locking, the mechanics are moved out of the braking position in a backward direction at least around the undercut.

8 . An electromechanical brake actuator (EMB) for a friction brake of a vehicle, wherein the EMB comprises:
an electric drive; mechanics configured to transmit a drive movement of the drive to a friction brake of the vehicle; and an electromechanical locking actuator configured to lock the mechanics.

9 . The EMB according to claim 8 , wherein in which the locking actuator is open when de-energized.

10 . The EMB according to claim 8 , wherein the locking actuator includes at least one switchable locking pawl and a latching device configured to latch the locking pawl is coupled to the mechanics.

11 . The EMB according to claim 10 , wherein the latching device is disposed on a drive side of the mechanics.

12 . The EMB according to claim 10 , wherein the locking pawl and the latching device create a switchable freewheel to prevent a backward movement of the mechanic, wherein a forward movement is not locked in an activated state of the freewheel as well.

13 . The EMB according to claim 10 , wherein the latching device is undercut, wherein a forward pulse of the drive is needed to unlatch the locking pawl.

14 . A control unit configured to operate an electromechanical brake actuator (EMB) for a friction brake of a vehicle, the control unit configured to:
control a locking actuator of the EMB to lock mechanics of the EMB when a drive of the EMB has moved the mechanics to a braking position and a standstill of the friction brake is detected.

15 . A non-transitory machine-readable storage medium on which is stored a computer program for operating an electromechanical brake actuator (EMB) for a friction brake of a vehicle, the computer program, when executed by a processor, causing the processor to perform:
controlling a locking actuator of the EMB to lock mechanics of the EMB when a drive of the EMB has moved the mechanics to a braking position and a standstill of the friction brake is detected.

Assignees

• Bosch Gmbh Robert

Inventors

• Kratzer Dietmar
• Gardt Andrej
• Lutz Bernd
• Csoti Janos Tamas
• Boehm Mark
• Winkler Martin

Classifications

• B60T13/743

  with a spring accumulator · CPC title

• B60T13/741 Primary

  acting on an ultimate actuator · CPC title

• B60T13/746 Primary

  and mechanical transmission of the braking action · CPC title

• F16D63/006

  Positive locking brakes · CPC title

• F16D65/16

  arranged in or on the brake · CPC title