A method for adjusting the brake pedal counter force in a vehicle with a hydraulic vehicle brake and an electromechanical brake device includes modulating the brake pressure during the simultaneous operation of the hydraulic vehicle brake and the electromechanical brake device such that the brake pedal counter force follows a predetermined target profile.

A method for operating a brake installation of a vehicle. A first electrically controllable pressure provision device provides brake pressure for actuating hydraulically actuatable brakes. A first electronic open-loop and closed-loop control unit, and a first pressure detection device, measures brake pressure provided by a primary brake system. A secondary brake system between the primary system and a part of the wheel brakes has a second electrically controllable pressure provision device provides brake pressure for actuating at least the part of the brakes. A second electronic open-loop and closed-loop control unit, and at least one second pressure detection device, the signals of which are processed in the second electronic open-loop and closed-loop control unit. The secondary system monitors the primary system based on signals from the second pressure detection device and on a predefined brake pressure demand to build up a brake pressure corresponding to the predefined brake pressure demand.

A fluidic control system (1) for controlling a vehicle, which includes a controller (2) and a closed fluidic circuit. The circuit includes a pump (3) for pressurizing fluid in the circuit, valve means (40, 50, 60), an actuator (4, 5, 6) and a precharge accumulator (7). The valve means (40, 50, 60) is fluidly connected to the inlet and outlet of the pump (3) and the actuator (4, 6) is fluidly connected to the valve means (40, 50, 60) for selectively receiving pressurized fluid therefrom. The precharge accumulator (7) includes a movable member (73, FIG. 2) that describes a variable volume (71) fluidly connected to the circuit between the valve means (40, 50, 60) and the inlet of the pump (3). The system (1) also includes a sensor (70) for determining the position of the movable member (73) for estimating the quantity of fluid and/or detecting an abnormal pressure variation within the circuit.

A control method of an idle stop and go system is provided. The method includes determining whether a stop condition of an engine operating in an idle state is satisfied and determining whether a pressure increase value of a brake oil formed during a predetermined time period is greater than a predetermined value when the stop condition of the engine is satisfied. A valve connected to a hydraulic line to which the brake oil pressure is transmitted is then temporarily closed and then reopened when the pressure increase value is greater than the predetermined value. The engine is stopped after the valve is temporarily closed and reopened.

A device for a hydraulic actuating system, e.g., a motor vehicle brake, a clutch or a gear selector, may include the following components arranged in one housing, forming a main module: at least one pressure supply device driven by an electric motor drive, and a valve arrangement comprising at least one solenoid valve. The device may further include an electrical control unit (ECU) and valve output stages and sensors. The main module may be electrically and/or hydraulically connected to at least one further system component, which system component may include and actuating device and a travel simulator.

A hydraulic motor vehicle brake system comprises a vehicle dynamic control system which comprises a first brake circuit which acts on at least one first wheel brake, and a second brake circuit which acts on at least one second wheel brake, the first brake circuit comprising a first hydraulic pressure generator and the second brake circuit comprising a second hydraulic pressure generator, which can be actuated electrically for control interventions. Furthermore, the hydraulic motor vehicle brake system comprises an electrically actuable third hydraulic pressure generator, and a controller which is configured to detect failure of at least one of the two brake circuits and a requirement of a control intervention on the at least one brake circuit, to actuate at least the third hydraulic pressure generator for assisting the control intervention.

A hydraulic brake system for a land vehicle includes a brake pedal; a wheel brake; and a master brake cylinder connected to the brake pedal by a brake booster and a pump. The outlet of the pump is connected to the wheel brake by a supply line and the inlet is connected to the wheel brake by a return line. The pump moves hydraulic fluid to the wheel brake. A temporary store is connected to the inlet of the pump and the wheel brake by the return line. A pressure reduction valve, arranged in the return line of the wheel brake, has a throttling effect in the open state. A control unit compensates for the difference between a total braking torque specified by the brake pedal and a generating braking torque provided by an electric machine by setting the hydraulic braking torque during a regenerative braking process of the vehicle.

An electric braking device includes: a first valve unit for adjusting a first differential pressure between a master cylinder side liquid pressure and a wheel cylinder side liquid pressure; a storage unit forming a fluid storage chamber; second valve units for adjusting a second differential pressure between the master cylinder side liquid pressure and a storage chamber side liquid pressure; an electric pump for discharging the fluid in the storage chamber; and a control unit which, while operating the electric pump during a time from initiation of braking force application until a request value acquired by a request braking force acquiring unit reaches a maximum value, controls the first valve unit such that the first differential pressure becomes zero, and controls the second valve units such that the second differential pressure becomes zero.

A cutoff valve comprises a coil wound around an outer periphery of a bobbin, a cylinder in contact with a protruding portion formed in an inner side of the bobbin, and an armature disposed inside the cylinder and moved in a winding axis direction of the coil by energization of the coil.

A method for determining a leakage in a hydraulic brake system in a vehicle includes evaluating a suspected leakage in the hydraulic brake system and taking into account an actuation of an automated hand brake during the evaluation of the suspected leakage. The hydraulic brake system has a hydraulic footbrake and the automated hand brake has an electromechanical actuator. The hydraulic footbrake and the automated hand brake are configured to act on the same brake piston.