A part diagnostic device includes an acquisition unit that acquires vehicle information on a vehicle, an analysis unit that analyzes a vehicle characteristic of the vehicle from the vehicle information acquired by the acquisition unit, and a determination unit that determines whether a part related to the vehicle characteristic is a genuine part based on the vehicle characteristic analyzed by the analysis unit.

An electropneumatic brake control module (1) has a supply connection (2) for connecting a compressed air supply (3); a first wheel brake connection (4) and a second wheel brake connection (6); a pneumatically controlled inlet-outlet valve unit (8) for controlling a first brake pressure (PB1) at the first wheel brake connection (4) and a second brake pressure (PB2) at the second wheel brake connection (6), which is independent of the first brake pressure (PB1); and an electropneumatic pilot control unit (10) for controlling at least one main control pressure (PH) at a main valve (12) of the inlet-outlet valve unit (10). The main valve (12) of the inlet-outlet valve unit (10) is a pneumatically controllable 3/2-way valve (13) with a main valve control connection (12.4).

A brake control system for a motor vehicle comprises a first control device for controlling a first brake actuator, a second control device for controlling a second brake actuator and a third control device for controlling the first and second brake actuator. A switching apparatus is configured to connect the third control device to the first brake actuator and/or to the second brake actuator depending on a fault status of the brake control system.

A method for controlling vehicle braking of a wheel rotor having a brake pad associated therewith includes moving a piston into engagement with the brake pad by applying hydraulic pressure to the piston. The piston is locked in place against the brake pad with a parking brake. The hydraulic pressure is removed from the piston while the parking brake is locked.

The present disclosure relates to an electromechanical brake system and a method of controlling the same, and according to one aspect of the present disclosure, the method of controlling the electromechanical brake system may include calculating a required fluid amount according to an actual pressure required for brake oil required to generate a braking force by the motor, calculating a ratio of the calculated required fluid amount and a required fluid amount reference according to a map, and applying the required fluid amount as the required fluid amount reference according to the calculated ratio.

A device designed for controlling and regulating an electro-pneumatic parking brake circuit includes a manual controller configured to actuate a parking brake via the electro-pneumatic parking brake circuit, the manual controller having a first circuit arrangement and a second circuit arrangement, the first circuit arrangement being a digital, bidirectional circuit arrangement and the second circuit arrangement being an analog circuit arrangement. The device further includes control electronics electrically connected to the manual controller. The first circuit arrangement is connected to the control electronics via a first connection cable and the second circuit arrangement is connected to the control electronics via a second connection cable. The first connection cable is a digital data transmission channel configured to enable a digital data transmission between the digital circuit arrangement and the control electronics. The second connection cable is an analog data transmission channel configured to enable an analog data transmission.

An electric hydraulic brake includes: wheel brakes configured to supply braking force to wheels of a vehicle; a main braking unit including a reservoir which stores brake oil, and a master cylinder configured to form pressure of the brake oil in conjunction with a main brake motor; and a hydraulic controller comprising at least one pump configured to pump the brake oil in conjunction with an auxiliary brake motor, and configured to selectively transmit the pressure of the brake oil formed in the master cylinder or the pump to the wheel brakes. The hydraulic controller includes at least one auxiliary flow path which is connected at a first end thereof to the reservoir and is connected at a second end thereof to an inlet of the pump to transmit hydraulic pressure from the reservoir to the pump directly through the at least one auxiliary flow path.

An electropneumatic valve assembly is provided for actuating a parking brake function of an electropneumatic brake system of a commercial vehicle. The assembly includes a parking brake valve unit which receives supply pressure via a supply pressure path. A pneumatically self-holding trailer valve unit is connected to the supply pressure path and has a pneumatically switchable trailer supply valve. The supply valve provides a trailer supply pressure to a trailer supply port in dependence on an electronic trailer brake signal. The parking brake valve unit has a pilot valve unit and a main valve unit and the pilot valve unit outputs a parking brake control pressure at the main valve unit. The main valve unit outputs a parking brake pressure at a spring brake port. The valve assembly has a compensation valve to maintain the parking brake control pressure outputted at the main valve unit to compensate for valve leakage.

System and techniques for vehicle operation safety model (VOSM) compliance measurement are described herein. A subject vehicle is tested in a vehicle following scenario against VOSM parameter compliance. The test measures the subject vehicle activity during phases of the following scenario in which a lead vehicle slows and produces log data and calculations that form the basis of a VOSM compliance measurement.

A brake system may include an actuation device, in particular a brake pedal; a first piston-cylinder unit with two pistons, in particular an auxiliary piston and a second piston, in order to supply brake circuits with a pressure medium via a valve device, wherein one of the pistons, in particular the auxiliary piston, can be actuated by means of the actuation device; a second piston-cylinder unit comprising an electric motor-powered drive, a transmission, and at least one piston in order to supply pressure medium to at least one of the brake circuits via a valve device; and a motor pump unit with a valve device in order to supply pressure medium to the brake circuits. The brake system may further include a hydraulic travel simulator which is connected to a pressure or working chamber of the first piston-cylinder unit.