The present disclosure relates to a composite cable for a vehicle and a composite cable assembly, which are capable of simultaneously providing a communication function and power to an electronic parking brake (EPB) and an anti-lock brake system (ABS) for use in a vehicle, and maximizing electromagnetic compatibility (EMC) shielding performance between internal components or external cables.

An EPB (Electronic Parking Brake) control apparatus may include: a first EPB switch of an EPB; a first controller connected to two terminals among the plurality of terminals of the first EPB switch, and configured to calculate a first signal value by combining signals received from the two terminals, and diagnose the state of the first EPB switch according to the first signal value, and a second controller connected to the other two terminals among the plurality of terminals of the first EPB switch, and configured to calculate a second signal value by combining signals received from the two terminals, and diagnose the state of the first EPB switch according to the second signal value.

A braking system having expanded functionality, which provides the driver of a vehicle the option to manually control the clamping force of the rear brakes as desired, while keeping existing braking system functionalities. The braking system includes a manual control device, such as a hand lever assembly, and the driver is able to move the hand lever to various positions. The position of the lever corresponds to an equivalent rear hydraulic brake clamping force request. A fully retracted lever corresponds to a complete release action of the rear hydraulic brakes, and a fully actuated lever corresponds to a complete clamping of the rear hydraulic brakes. Any position in between the fully retracted and fully actuated positions corresponds to a partial apply of the rear hydraulic brakes using a predefined ratio of force to lever position.

When an ON operation of an electric parking brake apparatus is performed when a vehicle is moving, a vehicle brake control apparatus executes an EPB stop process in order to stop the vehicle by braking force generated by a hydraulic brake apparatus. If a hydraulic brake malfunction wheel, at which the hydraulic brake apparatus cannot generate braking force properly, is detected during a time period from the beginning of the EPB stop process to the stop of said vehicle, the vehicle brake control apparatus makes the hydraulic brake apparatus stop generating braking force at wheels including the hydraulic brake malfunction wheel. Meanwhile, the vehicle brake control apparatus makes the electric parking brake apparatus start generating braking force at a rear wheel. Subsequently, the vehicle brake control apparatus makes the electric parking brake apparatus start generating braking force to the other rear wheel.

In a method for controlling a parking brake in a vehicle, in order to set a clearance between the brake pad and the brake disk, a supply voltage is first applied to an electric motor, after which the supply voltage is switched off before the brake pad comes into contact with the brake disk.

An electric parking brake system includes a wheel driven by an electric motor to move a vehicle, a parking brake maintaining the wheel stopped, a parking brake actuator operating the parking brake, and a drive controller controlling the parking brake actuator. The drive controller controls the electric motor to maintain the wheel of the vehicle stopped while the vehicle is parked, and calculates a parking torque based on a control amount of the electric motor that maintains the wheel stopped. The drive controller calculates a necessary braking force for the parking brake to maintain the wheel stopped based on the calculated parking torque, and controls the parking brake actuator so that the necessary braking force is generated.

A system on a tractor for controlling trailer service brakes comprises a manually operated trailer brake switch, a first electropneumatic valve in communication with a pressure source and a controller. The controller has an input communicating with the trailer brake switch, an output communicating with the electropneumatic valve and control logic. The control logic receives an input from the trailer brake switch indicating a driver's request to apply the trailer service brakes of the combination vehicle, determines if a predetermined condition exists and transmits a signal to the output to the electropneumatic valve. The electropneumatic valve transmits pressure to a trailer service control line to actuate the trailer service brakes in response to the trailer brake switch and existence of the predetermined condition.

An electric brake device has at least three control units: a first front wheel control unit for controlling a front-left wheel brake mechanism and a front-right wheel brake mechanism; a second front wheel control unit again for controlling the front-left wheel brake mechanism and the front-right wheel brake mechanism; and a rear wheel control unit for controlling a rear-left wheel brake mechanism and a rear-right wheel brake mechanism. In case of failure of at least one of the three control units, at least one of the non-defective other control units temporarily reduces the braking force of the target brake mechanism.

An operating switch for commanding actuation of an electric parking brake mechanism includes two input terminals and two output terminals, a pair of two wirings for each input-terminal/output-terminal pair of the two input terminals and the two output terminals, each of the wirings being located between the input terminals and the two output terminals, a first switch element provided for the input terminals or the output terminals, and configured to switch connections to the two wirings, according to a command for the actuation, and a second switch element connected to one wiring of the two wirings that connects the input terminals and the output terminals when the command for the actuation given to the first switch element is set to a mode of non-operation. The second switch element is configured to switch connections to the two output terminals or the two input terminals, according to the command for the actuation.

A method of controlling a brake system includes steps of: determining a motor time constant, estimating a motor temperature of a motor based on the motor time constant; estimating a position of component of the brake system; estimating a clamping force based on the estimated position of the component; comparing the estimated clamping force to a threshold predetermined clamping force value to determine if a sufficient clamping force has been created.