US 12,441,289 B2
Electromechanical braking actuator for a vehicle, particularly for at least one railway vehicle, and braking system
Roberto Tione, Lauriano (IT)
Assigned to Faiveley Transport Italia S.P.A., Piossasco (IT)
Appl. No. 18/005,050
Filed by FAIVELEY TRANSPORT ITALIA S.P.A., Piossasco (IT)
PCT Filed Jul. 13, 2021, PCT No. PCT/IB2021/056292
§ 371(c)(1), (2) Date Jan. 10, 2023,
PCT Pub. No. WO2022/013737, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 102020000016912 (IT), filed on Jul. 13, 2020.
Prior Publication US 2023/0339448 A1, Oct. 26, 2023
Int. Cl. B60T 17/22 (2006.01); B60T 13/74 (2006.01); B61H 15/00 (2006.01); F16D 65/28 (2006.01)
CPC B60T 17/228 (2013.01) [B60T 13/746 (2013.01); B61H 15/00 (2013.01); F16D 65/28 (2013.01); B60T 17/221 (2013.01); B60T 2270/406 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electromechanical braking actuator for a vehicle, comprising:
a service braking control unit arranged to receive a service braking force request electrical signal and generating a braking force control signal, the value of which is a function of said service braking force request electrical signal;
an electromechanical module arranged to receive the braking force control signal generated by the service braking control unit and to generate a braking force, the value of which is a function of said braking force control signal, wherein said electromechanical module is arranged to also receive power through said braking force control signal;
at least one force transmission member arranged to transmit the braking force generated by the electromechanical module to braking force application means, wherein said at least one force transmission member is arranged to be controlled by said electromechanical module so as to translate along a translation axis, wherein the translation of said at least one force transmission member according to a first application direction involves an increase of the braking force applied by the braking force application means and the translation of said at least one force transmission member according to a second application direction, opposite to said first application direction, involves a reduction of the braking force applied by the braking force application means;
the electromechanical braking actuator comprising a safety unit arranged to:
receive an electrical position signal, the value of which is indicative of the position of said braking force application means along said translation axis;
determine an instantaneous position of the braking force application means based on the value of the electrical position signal; and
through first interruption means, prevent the braking force control signal emitted by the service braking control unit from reaching the electromechanical module, when:
a) based on the value of the electrical position signal, the safety unit determines that the braking force application means are in a position along a force application axis between a maintenance position at a first distance from braking force receiving means, and a rest position at a second distance from said braking force receiving means, less than said first distance;
b) based on changes of the value of the electrical position signal over time, the safety unit determines that the braking force application means are moving from the rest position to the maintenance position.