Braking system of a vehicle and method for operating such a braking system

Abstract

The present invention relates to a braking system (102) of a vehicle (100), wherein the braking system (102) has a primary central control unit (106), a secondary central control unit (108) and an electrically controllable brake actuator (104) for each braked wheel of the vehicle (100), wherein all brake actuators (104) can be controlled by the primary central control unit (106) and the brake actuators (104) of an individual axle of the vehicle (100) can also be controlled by the secondary central control unit (108), wherein the primary central control unit (106) is designed to determine target braking torques (114) for all brake actuators (104) using a target deceleration value (110) and to transmit them to the brake actuators (104), wherein the secondary central control unit (108) is designed toin the event of a fault in the primary central control unit (106), using the target deceleration value (110), to determine substitute target braking torques (116) for the brake actuators (104) of one axle and to transmit them to the brake actuators (104) of one axle.

Claims

[1] A braking system (102) of a vehicle (100), wherein the braking system (102) comprises a primary central control unit (106), a secondary central control unit (108) and an electrically controllable brake actuator (104) for each braked wheel of the vehicle (100), wherein all brake actuators (104) are controllable by the primary central control unit (106) and the brake actuators (104) of an individual axle of the vehicle (100) are further controllable by the secondary central control unit (108), wherein the primary central control unit (106) is designed to determine target braking torques (114) for all brake actuators (104) using a target deceleration value (110) and to transmit them to the brake actuators (104), wherein the secondary central control unit (108) is designed toin the event of a fault in the primary central control unit (106), using the target deceleration value (110), to determine substitute target braking torques (116) for the brake actuators (104) of one axle and to transmit them to the brake actuators (104) of one axle. [2] Braking system (102) according to claim 1, wherein the primary central control unit (106) is connected to a primary energy supply (118) of the vehicle (100), wherein the secondary central control unit (108) is connected to a secondary energy supply (120) of the vehicle (100). [3] Braking system (102) according to claim 2, wherein the secondary central control unit (108) is further connected to the primary power supply (118). [4] Braking system (102) according to one of the preceding claims, wherein all brake actuators (104) are connected to a primary energy supply (118) of the vehicle (100). [5] Braking system (102) according to claim 4, wherein the brake actuators (104) of the one individual axle are further connected to a secondary power supply (120) of the vehicle (100). [6] Braking system (102) according to one of the preceding claims, wherein all brake actuators (104) each have their own actuator control unit. [7] Braking system (102) according to one of the preceding claims, wherein the secondary central control unit (108) is connected to the brake actuators (104) of a front axle of the vehicle (100). [8] Braking system (102) according to one of the preceding claims, wherein the secondary central control unit (108) has a monitoring device for detecting the fault in the primary central control unit (106). [9] Method for operating a braking system (102) of a vehicle, wherein a primary central control unit (106) of the vehicle (100) determines target braking torques (114) for all brake actuators (104) of the vehicle (100) using a target deceleration value (110) and transmits them to the brake actuators (104), wherein a secondary central control unit (108), in the event of a fault in the primary central control unit (1065), determines substitute target braking torques (116) for the brake actuators (104) of an individual axle of the vehicle (100) using the target deceleration value (110) and transmits them to the brake actuators (104) of the one individual axle. [10] A method according to claim 9, wherein the primary central control unit (106) is monitored by the secondary central control unit (108) to detect the fault. [11] Method according to claim 10, wherein the secondary central control unit (108) compares the target deceleration value (110) with an actual deceleration of the vehicle (100) in order to detect the error. [12] Method according to one of claims 10 to 11, wherein the secondary central control unit (108) monitors communication between the primary central control unit (106) and the brake actuators (104) in order to detect the fault. [13] Computer program product which is designed to instruct a processor, when executing the computer program product, to execute, implement and / or control the method according to one of claims 9 to 12. [14] A machine-readable storage medium on which the computer program product according to claim 13 is stored.

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