A hydraulic actuation system for a brake system may include at least one brake circuit including at least one wheel brake, a master cylinder that may be actuated using an actuating device and having at least one working chamber, and a hydraulic travel simulator. The working chamber may be connected via a 3/2-way valve either to a brake circuit or to the travel simulator.

A purpose is to obtain a brake hydraulic pressure controller and a method for manufacturing a brake hydraulic pressure controller that realize suppression of manufacturing cost and downsizing of the brake hydraulic pressure controller and simplification of a manufacturing process.

The brake hydraulic pressure controller 1 has: a base body 10 formed with a channel of a hydraulic fluid; plural hydraulic pressure regulating valves 3 provided in the channel; and plural drive coils respectively provided in the plural hydraulic pressure regulating valves 3 and driving the hydraulic pressure regulating valves 3. One end section 15B that constitutes one end side of the drive coil 11 is adhered to an adhesive surface section that constitutes a contour of the base body 10 via a first adhesive member 17A.

The disclosure relates to a method for controlling a hydraulic pressure in at least one wheel brake of a hydraulic motor vehicle braking system, wherein a system pressure is generated by an electrical pressure supply device and, by control of an in particular normally open inlet valve, having an opening current characteristic curve, a required hydraulic pressure, which is lower than the system pressure, is set in the at least one wheel brake. In order to improve the pressure control, provision is made that the inlet valve is opened by application of an opening current, in particular below the opening current characteristic curve, and is switched over from the opening current to an intermediate current on the opening current characteristic curve.

A brake valve has a main body, a shaft movable within the main body, a spool plate, a first spring and a second spring arranged within the main body. The spool plate is movable between a release configuration and a brake configuration where the shaft is adapted to be linked with a first actuator configured to slide the shaft. The brake valve has a command fluid port connected to a brake chamber. A valve ring defines the brake chamber with the main body and the shaft. The valve ring is configured to, when a pilot pressure is applied in the brake chamber, move the shaft towards the actuated position or push the second spring so as to move the spool plate towards the brake configuration.

A brake system for a motor vehicle comprises a hydraulic line system with at least one normally closed hydraulic valve, wherein a final stage is provided for electrically actuating the at least one hydraulic valve. To minimize noise emissions, the final stage is a final stage with analog control and a computing unit is provided which is configured to determine a valve current based on a pressure difference across the hydraulic valve and to actuate the final stage to make the valve current available at the hydraulic valve.

A system including a supply valve disposed between a chamber and a pressure source, a discharge valve disposed between the chamber and an external atmosphere, a first control unit, and a second control unit. The first control unit coupled with the supply valve by a first switch and with the discharge valve by a second switch. The first control unit outputting signals to the first and second switches to control the supply and discharge valves. The second control unit coupled with the discharge valve by a third switch and a fourth switch, the second control unit outputting signals to the third and fourth switches to control the supply and discharge valves. The first control unit may include a first microcontroller to control the signals of the first control unit using an artificial intelligence (AI) neural network having artificial neurons arranged in layers and connected with each other by connections.

A valve unit for an anti-lock braking system has a valve body, a piston, and an elastic element acting on the piston. The valve body has an outlet port, an inlet port, a primary chamber communicating with the outlet port, an expansion chamber with an outflow passage establishing fluid communication between the primary chamber and the expansion chamber, and a bypass passage between the inlet port and the outlet port. The piston is movable in the primary chamber and has a longitudinal through cavity, a first transversal surface facing the outlet port, and a second transversal surface facing away from the outlet port. The first transversal surface has an area smaller than the area of the second transversal surface. The elastic element exerts an elastic force to move the piston away from the outlet port. The valve unit is activatable by pressure of a brake fluid in the primary chamber.

Provided is a brake apparatus including: a solenoid valve provided on the flow path and including a coil to open or close a flow path; a main driving circuit electrically connected to the coil to allow or block a current flowing through the coil; a sub driving circuit electrically connected to the coil and connected in parallel with the main driving circuit to allow or block a current flowing through the coil; a main cut-off switch electrically connected to the main driving circuit; a sub cut-off switch electrically connected to the sub driving circuit; and a processor configured to control at least one of the main driving circuit and the sub driving circuit to drive the solenoid valve.