A brake system for a motor vehicle has at least a first wheel brake and at least a second wheel brake. A first inlet valve is fluidically connected, on the one hand, to the first wheel brake, and, on the other hand, to a brake pressure source, and a second inlet valve is fluidically connected, on the one hand, to the second wheel brake, and, on the other hand, to the brake pressure source. In this case, a switching valve is provided, which fluidically connects the one fluid outlet of the second inlet valve in a first switching position to the second wheel brake and in a second switching position to the first wheel brake.

A brake system for selectively actuating at least one of a pair of front wheel brakes and a pair of rear wheel brakes of a vehicle, one of which is hydraulically actuated and the other of which is electrically actuated, includes a reservoir. First and second integrated control units are in fluid communication with the reservoir and respective ones of the hydraulically actuated wheel brakes. The first and second integrated control units have first and second power transmission units connected to first and second electronic control unit, respectively. Each electronic control unit is configured to control a corresponding power transmission unit and a selected one of the electrically actuated wheel brakes on a contralateral side of the vehicle from the selected one of the hydraulically actuated wheel brakes which is actuated by the power transmission unit.

A method for determining a position of a hydraulic pump includes determining the position and/or change of position of the hydraulic pump based on a current and/or voltage measurement signal as well as a frequency of the measurement signal. The method also includes utilizing the determined position and/or changing of position of the hydraulic pump for actuating the electrical machine.

A braking system for vehicles comprising a pilot pump provided with a manual actuation means, the pilot pump being fluidically connected to a hydraulic actuator device in turn operatively connected to a braking device associated with a wheel of said vehicle, wherein the hydraulic actuator device delimits a first and a second actuation chamber fluidically separated by a movable septum along an axial direction X-X, the first actuation chamber containing fluid pressurized by the pilot pump, the second actuation chamber being filled with fluid under pressure and being provided with a delivery duct fluidically connected to said braking device. Advantageously, the hydraulic actuator device comprises a by-pass, offset axially with respect to said delivery duct and fluidically connected with the latter, the movable septum being connected to motor means in order to translate axially, independently of the braking action imposed through the manual actuation means of the pilot pump, the system comprising a processing unit and control operatively connected with the motor means and programmed so as to pass from a condition of standard operation or deactivation of the motor means, in which the movable septum connects the first actuation chamber with the by-pass and with the second actuation chamber, to a braking correction condition in which the motor means are activated to move the movable septum so that the first actuation chamber is fluidically separated from the by-pass and the second actuation chamber. In this way, the second actuation chamber, fluidically connected to the delivery duct, commands the actuation of the braking device, excluding the action imposed by the user through the pressurized fluid in the first actuation chamber.

Disclosed herein is an electronic brake system, which includes at least one or more valves provided to control a hydraulic pressure delivered to wheel cylinders provided in wheels, a pressure measurer configured to measure the hydraulic pressure delivered to the wheel cylinders provided in the wheels, and a controller configured to open at least one or more valves that deliver the hydraulic pressure to a corresponding wheel cylinder and close at least one or more valves that deliver the hydraulic pressure to the remaining wheel cylinders other than the corresponding wheel cylinder when the at least one or more valves are detected as being opened or closed a predetermined number of times or more during a predetermined time period, and synchronize the measured hydraulic pressure with a hydraulic pressure of the wheel cylinder having all of the at least one or more valves open.

An embodiment provides an electric brake system including a hydraulic pressure supplier configured to produce hydraulic pressure of oil using rotation force of a motor; a hydraulic circuit configured to convey hydraulic pressure discharged from the hydraulic pressure supplier to a wheel cylinder; a motor position sensor configured to measure a position of the motor; a motor current sensor configured to measure a current of the motor; and a controller configured to determine whether there is a leak in the hydraulic circuit based on the measured position and current of the motor, and determine a circuit that has a leak based on the measured position and current of the motor when it is determined to have a leak in the hydraulic circuit.

According to one embodiment, for example, when it is determined that a certain condition has been satisfied while first antilock control is being executed, a controller of a brake control apparatus executes second antilock control by opening and closing a solenoid valve with a motor stopped so that brake fluid of the wheel cylinder is caused to flow into a reservoir, the second antilock control including a second pressure reduction mode, the second pressure reduction mode reducing a pressure of a wheel cylinder while substantially equilibrating the pressure of the wheel cylinder and a pressure of the reservoir at a certain pressure or larger, the certain pressure being larger than zero.

A hydraulic brake system for a land vehicle including a hydraulic connection between a master cylinder and wheel brakes that is established or blocked by valve arrangements in dependence upon trigger signals from an electronic control with the electronic control unit devised and programmed in such a way that, in order to set a brake pressure characteristic required for a specific vehicle behavior, the electronic control unit supplies trigger signals through which the setting of a respective brake pressure characteristic in two brake circuits in predefined pressure stages (delta-p) is staggered in terms of time by a substantially predefined time stage (delta-t).

The invention relates to an emergency braking device comprising an actuator (2), a pressurizing circuit (3) supplying the actuator (2) via a control pressure and a discharge circuit (4), characterized in that the discharge circuit (4) comprises means (13, 14) for controlling the pressure and/or flow rate of the supply fluid of the actuator (2) during a discharge of the actuator, these control means (13, 14) being configured to define an intermediate pressure between a low pressure level and the control pressure of the actuator (2).

A brake system for a motor vehicle has at least a first wheel brake and at least a second wheel brake. A first inlet valve is fluidically connected, on the one hand, to the first wheel brake, and, on the other hand, to a brake pressure source, and a second inlet valve is fluidically connected, on the one hand, to the second wheel brake, and, on the other hand, to the brake pressure source. In this case, a switching valve is provided, which fluidically connects the one fluid outlet of the second inlet valve in a first switching position to the second wheel brake and in a second switching position to the first wheel brake.