Abstract: A brake system and a method of controlling the brake system including a pedal master unit, an electric booster unit, a pedal-feel generating unit, and an electric control unit, wherein the pedal master unit includes a master cylinder and an operating rod, the electric booster unit includes a motor, a motor piston, and a gear device-screw shaft combination, the pedal-feel generating unit includes a reaction disk configured to form a pedal feel force (FRD) and a pedal spring arranged to form a pedal feel force (Fspring), and the electric control unit is configured to variably control, in a regenerative braking mode and in a hydraulic braking mode, a ratio of increase to decrease of the pedal feel force (FRD) and a ratio of increase to decrease of the pedal feel force (Fspring).

Abstract: A braking control apparatus for a vehicle including: a pedal stroke sensing unit configured to sense a pedal stroke of a brake pedal; a pedal simulator pressure sensing unit configured to sense pressure of a pedal simulator that provides a reaction force in response to a stepping force of the brake pedal; and a control unit configured to apply different computation methods by selectively utilizing a pedal stroke STR sensed by the pedal stroke sensing unit and pedal simulator pressure P_SIM sensed by the pedal simulator pressure sensing unit at a plurality of stages defined while the brake pedal is pressed and released, and decide required braking pressure P which is required for braking the vehicle.

Abstract: The present disclosure provides an electric booster comprising: a motor piston configured to be moved by a motor; an operating rod configured to be moved in a direction parallel to a moving direction of the motor piston; a reaction disc configured to be pressed and moved by at least one of the motor piston and the operating rod; a master cylinder configured to generate a hydraulic pressure as the reaction disc moves; and a control unit controlling the operation of the motor, wherein the control unit receives the stroke of the brake pedal, calculates a required hydraulic braking force and a required stepping force based on the pedal stroke, and determines a required displacement of the motor piston for generating the required hydraulic braking force and the required stepping force using a contact area between the operating rod and the reaction disc.

Abstract: At least one embodiment of the present disclosure provides an electric booster brake apparatus including an electric booster unit, an electronic stability control (ESC) operating unit, and an electric-booster control unit. The electric booster unit has a motor, and a motor piston and a master cylinder and pressurizes the master cylinder by adjusting a displacement of the motor piston. The ESC operating unit includes a pressure sensor measuring pressure in the master cylinder and calculates a required braking pressure. The electric-booster control unit controls the position of the motor piston. The electric-booster control unit includes a feedforward control unit for converting the value of the required braking pressure into a motor piston displacement, and a feedback control unit for calculating a compensation displacement of the motor piston based on a difference between the value of the required braking pressure and the value of the pressure in the master cylinder.

Abstract: A braking system is configured to perform one or more of cooperative braking or a combination of regenerative braking and hydraulic braking. The system includes a master cylinder, a reaction disc made of an elastic material and configured to compress the master cylinder, a rod assembly including an operating rod, an elastomer fixing unit, and an elastomer whose one end abuts a part of the operating rod and the other end abuts the elastomer fixing unit, an electric booster including a motor piston configured to compress a part of the reaction disc, for compressing the master cylinder by adjusting a displacement of the motor piston, and an electric controller configured to control the electric booster and perform control to brake the vehicle by using one or more of the regenerative braking and the hydraulic braking.

Abstract: The present disclosure in at least one embodiment provides a braking system comprising: a pedal master unit; an electric booster unit; a reaction disc that generates a pedal force when compressed by at least one of the operating rod or the motor piston; and a controller that, upon receiving a regenerative braking interruption signal during the cooperative braking of the vehicle, senses a pressure change in the master cylinder and compensates for a displacement of the motor piston by an amount corresponding to the pressure change.

Abstract: A brake system and a method of controlling the brake system including a pedal master unit, an electric booster unit, a pedal-feel generating unit, and an electric control unit, wherein the pedal master unit includes a master cylinder and an operating rod, the electric booster unit includes a motor, a motor piston, and a gear device-screw shaft combination, the pedal-feel generating unit includes a reaction disk configured to form a pedal feel force (FRD) and a pedal spring arranged to form a pedal feel force (Fspring), and the electric control unit is configured to variably control, in a regenerative braking mode and in a hydraulic braking mode, a ratio of increase to decrease of the pedal feel force (FRD) and a ratio of increase to decrease of the pedal feel force (Fspring).

Abstract: A braking control apparatus for a vehicle including: a pedal stroke sensing unit configured to sense a pedal stroke of a brake pedal; a pedal simulator pressure sensing unit configured to sense pressure of a pedal simulator that provides a reaction force in response to a stepping force of the brake pedal; and a control unit configured to apply different computation methods by selectively utilizing a pedal stroke STR sensed by the pedal stroke sensing unit and pedal simulator pressure P_SIM sensed by the pedal simulator pressure sensing unit at a plurality of stages defined while the brake pedal is pressed and released, and decide required braking pressure P which is required for braking the vehicle.

Abstract: A method for detecting a malfunction of a brake system may include measuring a deceleration/acceleration upon braking and determining whether the brake system has the malfunction by comparing the measured deceleration/acceleration and a required deceleration/acceleration. If it is determined that the brake system has the malfunction, the method further includes determining whether a braking interval is an interval where braking is performed only through regenerative braking. If so, the method determines that a regenerative brake system has the malfunction. If not, the method further includes determining whether a left friction brake system or a right friction brake system has the malfunction by measuring a yaw rate value and determining whether a front wheel friction brake system or a rear-wheel friction brake system has the malfunction by using a variation amount of a measurement value of the deceleration/acceleration.

Abstract: A braking system for hybrid vehicle may include a brake pedal, a pedal stroke sensor detecting stroke of the brake pedal and outputting corresponding signal, a brake control unit receiving the signal of the pedal stroke sensor, a driving wheel caliper braking a driving wheel according to control of the brake control unit, a regenerative braking unit including a motor/generator which generates electric energy according to control of the brake control unit in braking of the driving wheel, a master cylinder connected with the brake pedal and operated by the brake pedal, and a driven wheel caliper braking a driven wheel according to operation of the master cylinder.

Abstract: A failure diagnosis method for a brake system of a vehicle determines whether the failure occurs in a regenerative braking device, a front-wheel friction braking device or a rear-wheel friction braking device. The method may include comparing a driver's required acceleration/deceleration with a current acceleration/deceleration of the vehicle, determining that a failure has occurred in the brake system of the vehicle when the driver's required acceleration/deceleration is different from the current acceleration/deceleration of the vehicle and comparing a driver's required braking torque with a regenerative braking maximum torque, and determining that the failure does not occur in the brake system of the vehicle when the driver's required acceleration/deceleration is substantially equal to the current acceleration/deceleration of the vehicle.

Abstract: A method for detecting a malfunction of a brake system may include measuring a deceleration/acceleration upon braking and determining whether the brake system has the malfunction by comparing the measured deceleration/acceleration and a required deceleration/acceleration. If it is determined that the brake system has the malfunction, the method further includes determining whether a braking interval is an interval where braking is performed only through regenerative braking. If so, the method determines that a regenerative brake system has the malfunction. If not, the method further includes determining whether a left friction brake system or a right friction brake system has the malfunction by measuring a yaw rate value and determining whether a front wheel friction brake system or a rear-wheel friction brake system has the malfunction by using a variation amount of a measurement value of the deceleration/acceleration.

Abstract: A failure diagnosis method for a brake system of a vehicle determines whether the failure occurs in a regenerative braking device, a front-wheel friction braking device or a rear-wheel friction braking device. The method may include comparing a driver's required acceleration/deceleration with a current acceleration/deceleration of the vehicle, determining that a failure has occurred in the brake system of the vehicle when the driver's required acceleration/deceleration is different from the current acceleration/deceleration of the vehicle and comparing a driver's required braking torque with a regenerative braking maximum torque, and determining that the failure does not occur in the brake system of the vehicle when the driver's required acceleration/deceleration is substantially equal to the current acceleration/deceleration of the vehicle.

Abstract: A method for controlling braking of a vehicle calculates a driver request braking deceleration and a current frictional coefficient of a road surface to obtain a vehicle deceleration corresponding to the coefficient of the road surface. A maximum deceleration at which a wheel lock does not occur upon braking only by a driving wheel is calculated when the driver deceleration is equal to or smaller than the coefficient by comparing the driver deceleration and the vehicle deceleration. A braking force is determined by distributing a regenerative braking force of the driving wheel and a frictional braking force of a driven wheel according to the coefficient when the maximum deceleration is smaller than the driver deceleration by comparing the maximum deceleration and the driver deceleration. A driving motor and a frictional braking device are controlled to generate the determined regenerative braking force and frictional braking force.

Abstract: A braking system for hybrid vehicle may include a brake pedal, a pedal stroke sensor detecting stroke of the brake pedal and outputting corresponding signal, a brake control unit receiving the signal of the pedal stroke sensor, a driving wheel caliper braking a driving wheel according to control of the brake control unit, a regenerative braking unit including a motor/generator which generates electric energy according to control of the brake control unit in braking of the driving wheel, a master cylinder connected with the brake pedal and operated by the brake pedal, and a driven wheel caliper braking a driven wheel according to operation of the master cylinder.

Abstract: A method for controlling braking of a vehicle calculates a driver request braking deceleration and a current frictional coefficient of a road surface to obtain a vehicle deceleration corresponding to the coefficient of the road surface. A maximum deceleration at which a wheel lock, does not occur upon braking only by a driving wheel is calculated When the driver deceleration is equal to or smaller than the coefficient by comparing the driver deceleration and the vehicle deceleration. A braking force is determined by distributing a regenerative braking force of the driving wheel and a frictional braking force of a driven wheel according to the coefficient when the maximum deceleration is smaller than the driver deceleration by comparing the maximum deceleration and the driver deceleration. A driving motor and a frictional braking device are controlled to generate the determined regenerative braking force and frictional braking force.