A method for operating an electromechanical braking system for a transportation vehicle having a brake pedal, a brake master cylinder, and an electromechanical brake booster. The electromechanical brake booster includes an actuator motor for increasing or decreasing the pedal force on the brake master cylinder to boost or reduce the braking power accordingly. A change in the boosting force of the electromechanical brake booster is limited to avoid uncontrolled changes of the brake boosting.

An electronic hydraulic brake device includes a main braking part and an assist braking part. The main braking part is configured to drive a motor to provide hydraulic pressure to a plurality of wheel cylinders. The assist braking part is connected to the main braking part. The assist braking part is configured to provide auxiliary hydraulic pressure to the plurality of wheel cylinders in response to an operation error of the main braking part.

An electronic hydraulic brake device includes a main braking part and an assist braking part. The main braking part is configured to drive a motor to provide hydraulic pressure to a plurality of wheel cylinders. The assist braking part is connected to the main braking part. The assist braking part is configured to provide auxiliary hydraulic pressure to the plurality of wheel cylinders in response to an operation error of the main braking part.

A braking force controller causes a first actuator unit to generate a target jerk when the target jerk is equal to or larger than a first jerk, causes the first actuator unit to generate the first jerk and a second actuator unit to generate a jerk obtained by subtracting the first jerk from the target jerk as an additional jerk when the target jerk is smaller than the first jerk and equal to or larger than the sum of the first jerk and a second jerk, and causes the first actuator unit to generate the first jerk and the second actuator unit to generate the second jerk as the additional jerk when the target jerk is smaller than the sum of the first jerk and the second jerk.

A method for operating a vehicle brake system, including activation of a electrohydraulic brake booster device when there is an actuation of a brake actuating element, so a brake pressure increase is brought about in a wheel brake cylinder, and decoupling of the wheel brake cylinder from a master brake cylinder of the brake system by closing a separating valve, it being ascertained, before the closing of the separating valve, whether a first quantity relating to an actuation speed of the actuation of the brake actuating element and/or a second quantity relating to a master brake cylinder pressure increase is within at least one specified normal value range, and, if warranted, the separating valve being closed without a delay, whereas otherwise the closing of the separating valve is delayed taking into account the second quantity and/or a third quantity relating to the brake pressure increase.

A control device including a fluid pressure control unit for controlling a pressure in a wheel cylinder by driving an electric motor of a pump on the basis of a command value; a motor target calculation unit for calculating a motor speed target value in accordance with an amount of increase in a fluid pressure target value; and a difference calculation unit for deriving a calculated value representing a difference obtained by subtracting the actual value from the target value for either the electric motor rotation speed or the pressure. The fluid pressure control unit derives the command value such that when the motor speed target value is less than the previous actual value for the electric motor rotation speed, the previous actual value is made the upper-limit of the command value, and the command value increases in proportion to the motor speed target value and to the calculated value.

Methods, systems, and apparatus for a brake assist control system. The brake assist control system is for a vehicle. The brake assist control system includes a first sensor configured to detect driver awareness. The brake assist control system includes an electronic control unit. The electronic control unit is coupled to the first sensor. The electronic control unit is configured to determine that a brake pedal and an accelerator pedal are in a released position. The electronic control unit is configured to determine that there is vehicle movement. The electronic control unit is configured to determine that a driver of the vehicle is unaware of the vehicle movement based on the driver awareness. The electronic control unit is configured to reduce or eliminate the vehicle movement.

A control device including a valve-opening control unit that reduces the current value below the holding current value and increases the opening degree of the differential pressure adjustment valve when an increase in a manipulated variable of a braking operation member has been detected while holding control is being performed; and a valve-closing control unit that, when a decrease in the manipulated variable of the braking operation member has been detected while the opening degree of the differential pressure adjustment valve has been increased by the valve-opening control unit, performs a pushing process of increasing the current value above the holding current value and closing the differential pressure adjustment valve, and a holding process of setting the current value to the holding current value after the pushing process has ended.

An electric brake system and a method for controlling the same are disclosed. The electric brake system includes a hydraulic control device, a sensing unit, and a controller. The hydraulic control device generates hydraulic pressure using a piston operated by an electric signal generated in response to a displacement of a brake pedal. The sensing unit detects driver's braking intention. When an electronic stability control (ESC) of a vehicle operates, the controller calculates a change amount of stroke of the piston needed to output brake pressure corresponding to the driver's braking intention, and acquires the calculated stroke change amount so as to boost pressure of each wheel at a predetermined slope.

A method is provided for operating a motor vehicle brake system that includes an actuatable brake master cylinder, a hydraulic brake booster, and at least one brake circuit that has at least one hydraulically actuatable wheel brake and at least one hydraulic-pressure generator driven by electric motor. The method includes monitoring a state of actuation of the brake master cylinder is monitored, and, upon detecting a maximum state of actuation, activating the hydraulic-pressure generator to increase the hydraulic pressure adjusted by the brake master cylinder in the brake circuit.