A hydraulic control device for at least one hydraulic aggregate of a brake system, and a brake booster control device, interacting therewith, for an electromechanical brake booster of the brake system. The hydraulic control device includes a first control electronics by which at least one motor target quantity that is to be realized by a motor of the electromechanical brake booster can be determined, taking into account a provided brake actuating strength quantity relating to a current actuation of a brake actuating element, and by which a specification signal corresponding to the at least one determined motor target quantity can be outputted to the brake booster control device. The brake booster control device has a second control electronics that, at least in a normal mode, outputs the control signal to the motor of the electromechanical brake booster, taking into account the specification signal outputted by the hydraulic control device.

A hydraulic control device for at least one hydraulic aggregate of a brake system, and a brake booster control device, interacting therewith, for an electromechanical brake booster of the brake system. The hydraulic control device includes a first control electronics by which at least one motor target quantity that is to be realized by a motor of the electromechanical brake booster can be determined, taking into account a provided brake actuating strength quantity relating to a current actuation of a brake actuating element, and by which a specification signal corresponding to the at least one determined motor target quantity can be outputted to the brake booster control device. The brake booster control device has a second control electronics that, at least in a normal mode, outputs the control signal to the motor of the electromechanical brake booster, taking into account the specification signal outputted by the hydraulic control device.

An industrial vehicle includes a hydraulically-operated brake device, a hydraulically-operated loading device, an electric motor, a hydraulic pump, a first hydraulic circuit having an accumulator and a detector for detecting pressure accumulated in the accumulator, a first oil passage connecting the first hydraulic circuit and the hydraulic pump, a load handling device, a second hydraulic circuit having a closed center control valve, a second oil passage connecting the second hydraulic circuit and the hydraulic pump, an oil tank, a pressure compensating circuit, a pilot passage, and a controller. When a selector valve is placed in a first position, hydraulic pressure generated by the hydraulic pump is transmitted to a pressure compensating valve in such a direction that disconnects the hydraulic pump from the oil tank to thereby create in the first oil passage hydraulic pressure that causes the accumulator pressure accumulation.

An industrial vehicle includes a hydraulically-operated brake device, a hydraulically-operated loading device, an electric motor, a hydraulic pump, a first hydraulic circuit having an accumulator and a detector for detecting pressure accumulated in the accumulator, a first oil passage connecting the first hydraulic circuit and the hydraulic pump, a load handling device, a second hydraulic circuit having a closed center control valve, a second oil passage connecting the second hydraulic circuit and the hydraulic pump, an oil tank, a pressure compensating circuit, a pilot passage, and a controller. When a selector valve is placed in a first position, hydraulic pressure generated by the hydraulic pump is transmitted to a pressure compensating valve in such a direction that disconnects the hydraulic pump from the oil tank to thereby create in the first oil passage hydraulic pressure that causes the accumulator pressure accumulation.

Provided is a stroke simulator in which the piston operates smoothly without being inhibited from displacement thereof by the negative pressure generated in the closed space, even if the piston is configured to be displaced so as to close the space in which the elastic member is housed, and to elastically deform the elastic member. A stroke simulator, in which a simulator piston presses a first return spring, which is housed in a bottomed cylindrical portion, from an opening portion side of the cylindrical portion, to cause the first return spring to be elastically deformed, and to generate a brake reaction force. When the opening portion is closed by the simulator piston, a brake fluid filled in the cylinder portion is taken into the inside of the cylindrical portion via a flow path leading to the inside of the cylindrical portion from a second cylinder.

A piston pump group for a brake system and a control method thereof are provided, and the piston pump group includes: a piston, a pump body provided with an operating chamber, and a transmission mechanism used for driving the piston to move in the operating chamber, where the transmission mechanism includes a lead screw transmission assembly, a follower, and a planetary gear assembly used for transmitting power to the lead screw transmission assembly, the follower is fixedly connected to the piston, the lead screw transmission assembly is used for driving the follower to move relative to the operating chamber, and a limiting member used for limiting the movement of the follower is disposed between the lead screw transmission assembly and the follower.

A piston pump group for a brake system and a control method thereof are provided, and the piston pump group includes: a piston, a pump body provided with an operating chamber, and a transmission mechanism used for driving the piston to move in the operating chamber, where the transmission mechanism includes a lead screw transmission assembly, a follower, and a planetary gear assembly used for transmitting power to the lead screw transmission assembly, the follower is fixedly connected to the piston, the lead screw transmission assembly is used for driving the follower to move relative to the operating chamber, and a limiting member used for limiting the movement of the follower is disposed between the lead screw transmission assembly and the follower.

An electronic brake system may be capable of performing braking operation according to a pedal effort of a driver even when the brake system operates abnormally as well as simplifying a configuration thereof by minimizing the number of valves for controlling a flow of oil pressure and precisely controlling pressure therein.

An electronic brake system may be capable of performing braking operation according to a pedal effort of a driver even when the brake system operates abnormally as well as simplifying a configuration thereof by minimizing the number of valves for controlling a flow of oil pressure and precisely controlling pressure therein.

A vehicle-use brake apparatus has a control unit which includes a correcting pressure acquisition section that acquires a flow rate correcting pressure corresponding to a discharge amount of brake fluid discharged by a pump, a command differential pressure acquisition section that acquires a command differential pressure by performing a flow rate correction where the flow rate correcting pressure is subtracted from a target wheel cylinder pressure, and a correction restriction section that performs a correction restriction by which the flow rate correcting pressure is reduced or the flow rate correction is not performed if an actual wheel cylinder pressure is smaller than a target wheel cylinder pressure.