An electro-pneumatic brake system for an automotive vehicle comprising brake actuators each with a service brake chamber and a park brake chamber, a service brake system forming a pneumatic main deceleration system and comprising service brake lines configured to supply air pressure to the service brake chamber of the brake actuators, a park brake system forming a pneumatic immobilization system and a backup pneumatic deceleration system, and comprising park brake lines configured to supply air pressure to the park brake chamber of the brake actuators, wherein the park brake system comprises a pressure controller device configured to perform a wheel anti-locking function under a condition of the park brake system being used as a backup deceleration system, the pressure controller device being configured to control the air pressure supply in the park brake lines.

A parking brake control device controls a hydraulic pressure unit for braking wheels hydraulically and a parking brake device for braking the wheels by transmitting power of an electric motor to the wheels mechanically. The parking brake control device includes a hydraulic brake control unit capable of exercising a hydraulic brake control under which a brake is applied to the wheels by the hydraulic pressure unit, on condition that a signal is received from an actuation switch for actuating the parking brake device, while a vehicle is running, and a pressure decrease rate setting unit configured to set a pressure decrease rate according to a closing condition satisfied upon entry into the closing stage of the hydraulic brake control when a pressure decrease control is exercised in a closing stage of the hydraulic brake control.

A method for detecting a small hydraulic leak of braking fluid in a vehicle, the vehicle having at least a first braking circuit and a second braking circuit, the method includes determining whether system braking pressure falls within a predetermined range, determining whether leakage exists in the braking circuits, determining whether the vehicle is in secure standstill, monitoring small leakage of a braking circuit while the vehicle is in secure standstill if leakage was detected and the vehicle is in the secure standstill, and isolating at least one of the braking circuits if a leakage exists in one of the braking circuits.

A system and method for detecting the operational status of a brake system on a railcar. The system receives from a sensor an indication of the magnitude of a braking force applied by the braking system in response to an instruction to increase or decrease the braking force. It compares the response to possible responses of the braking system in view of the instruction provided. Based on the comparison, the system generates at least one of a message and/or an alert indicating the status of the brake system. Additional sensors, including a pressure sensor on a brake pipe of the railcar, can be added for additional functionality.

A brake control system for issuing an early warning about a malfunction of a brake of a vehicle, in which the brake is configured to receive a brake signal and to perform a braking process after receiving the brake signal. The vehicle includes a sensor to generate sensor data, indicative of an actuation force of the brake. The brake control system includes a reception module to receive the brake signal and the sensor data, and by a processing module to monitor the sensor data during subsequent stages of the braking process, to detect, based on the monitored sensor data, a potential malfunction of the brake, and to issue a warning signal if the potential malfunction is detected.

A vehicle braking device includes a braking actuator, a hydraulic pressure generation device, a hydraulic pressure sensor, and an electronic control unit. The electronic control unit is configured to execute an upstream pressure maintaining process of controlling the hydraulic pressure generation device to increase and maintain the upstream hydraulic pressure, a downstream pressurization process of controlling the braking actuator such that hydraulic fluid is supplied to the wheel cylinder through the hydraulic pressure flow path in a state in which the upstream hydraulic pressure is maintained, and a failure determination process of determining that a failure has occurred in the braking actuator in a case where the upstream hydraulic pressure is not decreased to be equal to or lower than a determination threshold value as the downstream pressurization process is executed.

An anti-rollover apparatus and control method for heavy-duty vehicles with a pneumatic brake system includes an anti-yaw module, an anti-roll module, an electronic control unit (ECU) (10), a yaw velocity sensor (12), and a vehicle roll angle sensor (18). The ECU (10) controls solenoid valves (4, 9, 11, 19, and 24) to achieve braking of part of wheels to obtain anti-yaw torques and improve the yaw stability of the heavy-duty vehicles. The ECU (10) controls gas switch valves (21 and 22) to spray high-pressure gases recovered in brake chambers (1, 13, 16, and 26) out, anti-roll torques are obtained through the jet reactive force, and the roll stability of the heavy-duty vehicles is improved.

A cooperative brake apparatus comprises: a regenerative brake device configured to apply a regenerative braking force to a vehicle a hydraulic brake device configured to apply a hydraulic braking force to at least one wheels using a hydraulic pressure formed by a motor including a first coil and a second coil and a control unit including a power supply device, a first driving circuit configured to transmit electrical energy of the power supply device to the first coil, a second driving circuit configured to transmit the electrical energy of the power supply device to the second coil, a first motor controller configured to control a current applied to the first driving circuit, and a second motor controller configured to adjust a current applied to the second driving circuit, wherein each of the first motor controller and the second motor controller controls the current applied to the first driving circuit and the second driving circuit, respectively, based on the regenerative braking force.

A control system for a military vehicle includes processing circuitry configured to obtain a weight, an incline, a brake air supply pressure, a current gear, and a transaxle range of the military vehicle. The processing circuitry is also configured to determine a minimum brake air supply pressure for the military vehicle based on the weight, the incline, the current gear, and the transaxle range of the military vehicle. The processing circuitry is also configured to compare the brake air supply pressure to the minimum brake air supply pressure, and, in response to the brake air supply pressure being less than the minimum brake air supply pressure, operate a display of the military vehicle to provide an alarm to an operator of the military vehicle to notify the operator that the brake air supply pressure is less than the minimum brake air supply pressure.

A braking control device includes an upstream mechanism control unit, a determination unit, and a control unit. The upstream mechanism control unit is configured to feedback control the upstream mechanism in such a manner that a detected hydraulic pressure detected by a hydraulic pressure sensor is brought to an upstream target hydraulic pressure. The hydraulic pressure sensor detects a hydraulic pressure of the hydraulic pressure circuit. The determination unit is configured to determine, based on the detected hydraulic pressure by the hydraulic pressure sensor, whether hydraulic pressure hunting is occurring. The control unit is configured to control the downstream mechanism based on the upstream target hydraulic pressure and the target wheel pressure in a case where the determination unit determines that the hydraulic pressure hunting is occurring.