An electric hydraulic brake includes a plurality of wheel brakes; a reservoir storing brake oil; a master cylinder connected to the reservoir and configured to generate hydraulic pressure with a first motor; an auxiliary actuator including a second motor and a pump unit having piston pumps linked therewith that transmits the hydraulic pressure to the wheel brakes when the master cylinder malfunctions; a hydraulic circuit that selectively transmits the hydraulic pressure to the wheel brakes, and including a front wheel hydraulic circuit and rear wheel hydraulic circuit each configured to transmit the hydraulic pressure to a pair of front wheel brakes and a pair of rear wheel brakes, respectively, and a plurality of solenoid valves; a first controller to control the first motor and the hydraulic circuit with braking input; and a second controller to control the first motor and the front wheel hydraulic circuit when the first controller malfunctions.

A brake apparatus, for electrically driven motor vehicles, includes a traction motor at an axle of a vehicle, which traction motor is used both as drive motor and as brake system with recuperation of brake energy, a first piston-cylinder unit, which is actuatable by means of an actuating device, in particular brake pedal, a second piston-cylinder unit, which is actuatable by means of an electromotive drive and a non-hydraulic gearing apparatus, in particular spindle drive. The piston-cylinder units are connected via hydraulic connecting lines to wheel brakes of the motor vehicle. A pressure chamber of the first piston-cylinder unit is connected to two wheel brakes of a vehicle axle, and a pressure chamber of the second piston-cylinder unit is connected to a vehicle axle for active brake force feedback control and recuperation control in interaction with the traction motor.

A brake apparatus, for electrically driven motor vehicles, includes a traction motor at an axle of a vehicle, which traction motor is used both as drive motor and as brake system with recuperation of brake energy, a first piston-cylinder unit, which is actuatable by means of an actuating device, in particular brake pedal, a second piston-cylinder unit, which is actuatable by means of an electromotive drive and a non-hydraulic gearing apparatus, in particular spindle drive. The piston-cylinder units are connected via hydraulic connecting lines to wheel brakes of the motor vehicle. A pressure chamber of the first piston-cylinder unit is connected to two wheel brakes of a vehicle axle, and a pressure chamber of the second piston-cylinder unit is connected to a vehicle axle for active brake force feedback control and recuperation control in interaction with the traction motor.

A brake system for vehicles may have at least one front automatic actuator device, operatively connected to a manual actuator device by means of a first control unit, and to at least one braking device of a first axle. The system may also include at least one rear automatic actuator device, operatively connected to the manual actuator device via a second control unit, and to the at least one braking device of a second axle.

A vehicle drive device and a control method therefor are provided. The vehicle drive device includes: a power source including a first rotating electrical machine; a second rotating electrical machine; a differential unit including three rotating elements to which a first output shaft, a second output shaft, and the second rotating electrical machine are connected; and an electronic control device. The electronic control device regeneratively controls the first rotating electrical machine and the second rotating electrical machine in such a manner that negative torque is applied to the first output shaft and the second output shaft, when performing regenerative control by the second rotating electrical machine in a drive mode in which torque from the power source is distributed to the first output shaft and the second output shaft by controlling torque of the second rotating electrical machine during deceleration of a vehicle.

A method of brake steering in a four-wheel drive utility vehicle having a driven front axle carrying at least two front wheels, a driven rear axle carrying at least two rear wheels, a powertrain delivering torque to the front and rear axles via a connecting shaft, a controlled clutch arrangement in the connecting shaft operable to vary the distribution of delivered torque between the front and rear axles, and independently operable service brakes on each of the front and rear wheels. The method comprises, on the vehicle entering a turn, applying the service brakes of the front and rear wheels on the inside of the turn and adjusting the clutch arrangement to adapt the share of the available torque between the front and rear axles. Additional braking force may be applied from independently operable park brakes on the rear wheels in inverse relationship to the level of service brake force applied.

Method for operating a brake system of a motor vehicle having a hydraulic service brake device with hydraulically actuated wheel brakes on at least one front axle of the motor vehicle, and a parking brake device with wheel brakes, which can be actuated in each case by an electromechanical actuator, on a rear axle of the motor vehicle, wherein a motor vehicle actual longitudinal deceleration is measured, wherein during a braking operation by the hydraulic service brake device a braking operation is carried out by the parking brake device while the motor vehicle is traveling, wherein a motor vehicle setpoint longitudinal deceleration which is to be achieved is determined, and the electromechanical actuators of the parking brake device are actuated in such a way that the motor vehicle actual longitudinal deceleration is adjusted to the motor vehicle setpoint longitudinal deceleration.

The present disclosure provides a method of controlling braking of an electric vehicle in which friction braking force generated by a friction braking unit is applied to front wheels and regenerative braking force generated by a motor is applied to rear wheels includes: determining driver's request braking force by a controller based on a driver's braking-input value; detecting driving information and state information of the vehicle by a detection unit; and determining a braking mode of the vehicle that satisfies the driver's request braking force by the controller based on the detected information and information of running state of the vehicle obtained from the detected information. In addition, the present disclosure provides a system of controlling braking of an electric vehicle.

The invention relates to a method for controlling a braking system for setting a total braking torque distribution between a first and a second axle of a motor vehicle. The braking system includes a friction braking device and a recuperative braking device. The braking system has a total braking torque composed of a friction braking torque portion and a recuperative braking torque portion. The method include determining, for one axle, a minimal recuperation torque, which is set on that axle, and remains set on that axle for all driving situations as a recuperative braking torque portion.

A brake control device adjusts a front wheel braking hydraulic pressure of front wheel cylinders provided on front wheels of a vehicle and a rear wheel braking hydraulic pressure of rear wheel cylinders provided on rear wheels of the vehicle. The brake control device includes a hydraulic pressure generating unit configured to adjust a hydraulic pressure generated by an electric motor to an adjusted hydraulic pressure and apply the adjusted hydraulic pressure as the rear wheel braking hydraulic pressure and a hydraulic pressure correcting unit configured to adjust to decrease the adjusted hydraulic pressure to be a corrected hydraulic pressure, and apply the corrected hydraulic pressure as the front wheel braking hydraulic pressure.