An electropneumatic control module has a trailer control unit, which has a trailer brake pressure port and a trailer feed pressure port, a holding brake unit, which has a spring-type actuator port and a holding brake pilot control unit, and an electronic control unit, which switches a holding brake pilot control unit into a ventilation position, wherein a second holding brake pilot control port is connected in pressure-conducting manner to a first holding brake pilot control port and the spring-type actuator port is connectable to a vent. The holding brake unit is connected to a redundancy port and is configured to output a first holding brake pressure at the spring-type actuator port when the holding brake pilot control unit is in the ventilation position and a redundancy pressure is provided. The trailer control unit outputs a brake pressure at the trailer brake pressure port when a redundancy pressure is provided.

A control device of a brake system, according to the present invention, includes, as redundancy, a first control unit for controlling the valve, the motor and the like of a brake system by receiving a sensor unit input, and a second control unit capable of performing the same function as the first control unit when the first control unit malfunctions, and thus the present invention can control the brake system of a vehicle by using the second control unit in an emergency situation in which the first control unit does not normally operate.

A vehicle brake system, including: a first hydraulic-pressure control mechanism and a second hydraulic-pressure control mechanism configured to control a braking force; and a controller including a first-abnormal-state detecting device configured to detect whether the first hydraulic-pressure control mechanism is in a first abnormal state, a second-abnormal-state detecting device configured to detect whether the first hydraulic-pressure control mechanism is in a second abnormal state that the first hydraulic-pressure control mechanism reaches before reaching the first abnormal state, and an assist control device configured to control the second braking-force control mechanism so as to control the braking force when an assist wait time elapses after the second-abnormal-state detecting device has detected that the first hydraulic-pressure control mechanism is in the second abnormal state, the assist wait time being determined based on a temperature of a working fluid obtained by a temperature obtaining device of the brake system.

A method for decelerating a vehicle combination including a towing vehicle having a towing vehicle brake system and at least one trailer vehicle having a trailer brake system with an anti-lock brake system includes applying, by the towing vehicle brake system, a brake pressure to pneumatically operable wheel brakes of the towing vehicle according to a desired deceleration specified by a driver, and providing, by the towing vehicle brake system, a trailer brake pressure for the trailer brake system of the at least one trailer vehicle. An electronic brake control unit of the towing vehicle brake system: detects a current actual vehicle deceleration value continuously compares the current actual vehicle deceleration actual value with a maximum deceleration, and, when the current actual vehicle deceleration value reaches or exceeds the maximum deceleration, limits the brake pressure and provides an information signal.

A trailer braking system having a surge component used in combination with an electric over hydraulic brake system. The surge component includes a sliding member with a magnetic sensor for detecting trailer deceleration, the sliding member providing an initial pressurization of the hydraulic system. A trailer mounted electrical circuit detects when the tow vehicle brakes are applied and includes a microcontroller for detecting the speed of deceleration provided by the magnetic sensor. A trailer mounted electric motor receives a signal from the circuit board to vary pressure to the brakes in accordance with the speed of deceleration.

In accordance with some embodiments, the present disclosure provides A brake system for braking a vehicle using one or both of a main braking system and a redundancy braking system, the brake system comprising: a brake demand detecting unit configured to detect a driver's brake demand; an electronic control unit comprising: a pressure controller configured to control a pressure inside a master cylinder in response to a value detected by the brake demand detecting unit, wherein the internal pressure of the master cylinder is controlled by generating an electrical signal for a first demand current; a motor position controller configured to control a position of a motor by generating an electrical signal for a second demand current; and a current controller configured to control the current of the motor in response to an electrical signal received from one of the motor position controller and the pressure controller; a position detecting unit configured to detect a position of a rotor of the motor; and a pressure detecting unit configured to sense the internal pressure of the master cylinder.

According to at least one aspect, the present disclosure provides a method of controlling an electro-hydraulic brake including an electronic brake-force distribution (EBD) control function, the method comprising: an emergency braking determination operation of determining whether emergency braking is required for a vehicle; a motor control operation of controlling a current flowing in a motor connected to a main master cylinder to increase hydraulic pressure supplied to wheel brakes when it is determined that the emergency braking is required; a rear wheel inlet valve closing operation of closing an inlet valve connected to a rear wheel brake for a predetermined time so that a pressure of the rear wheel brake is not increased earlier than a pressure of a front wheel brake; a closed time period calculation operation of calculating a time during which the inlet valve is maintained in a closed state; and a rear wheel inlet valve opening operation of determining whether a time during which the inlet valve is closed exceeds a closed time period (t), maintaining the inlet valve in the closed state until the time reaches the closed time period (t), and opening the inlet valve when the time exceeds the closed time period (t).

According to at least one aspect, the present disclosure provides a braking device for a vehicle, the braking device comprising: an electronic control unit which controls a motor and a traction control valve and calculates a required pressure for braking a vehicle and a pressure in a main line, wherein the electronic control unit increases the pressure in the main line by applying a positive current to the motor when the required pressure is greater than the pressure in the main line and decreases the pressure in the main line by applying a negative current to the motor and opening the traction control valve when the required pressure is lower than or equal to the pressure in the main line.

An electro-pneumatic vehicle braking system including a control line, a modulator valve for controlling the supply of pressurised fluid to at least one brake actuator, a primary valve assembly and a secondary valve assembly, the primary valve assembly and the secondary valve assembly each being fluidly communicable with a source of pressurised fluid, and each of the primary and secondary valve assemblies being fluidly communicable with a control valve assembly, the control valve assembly being configurable in a first configuration to enable fluid communication between the primary valve assembly and the modulator valve, to provide a pneumatic control signal to the modulator valve, in a second configuration to enable fluid communication between the secondary valve assembly and the modulator valve, to provide a pneumatic control signal to the modulator valve, and in a third configuration in which fluid communication between either of the primary and secondary valve assemblies and the modulator valve is prevented and fluid communication between the control line and the modulator valve is enabled, to provide a pneumatic control signal to the modulator valve.

A braking system for heavy duty vehicles includes a primary active brake booster module having a primary reservoir, a primary actuator, and a master cylinder, the primary brake booster operably coupled with a rear axle, the rear axle including rear wheels coupled therewith. The braking system further includes a secondary active brake booster module having a secondary reservoir and a secondary actuator, the secondary brake booster operably coupled with a front axle, the front axle including front wheels coupled therewith.