A stroke-controlled balancing device for hydraulic braking systems, comprising a balancing duct, a normally closed balancing valve, configured, in use, to maintain a connection between the hydraulic braking system and the balancing duct either closed or open, a stem having an external surface and an internal surface. A balancing channel is provided on the internal surface of the stem, said channel being hydraulically connected to the balancing duct, and the balancing valve is configured to slide, in use, along the external surface of the stem in order to open the connection between the braking system and the balancing duct. A braking system comprising the balancing device, as well as a method of operation of the braking system, are also described.

A hydraulic brake assembly (12) includes a housing (24) having first and second side-by-side bores (30), each defining a respective master cylinder assembly. Each master cylinder assembly includes a master cylinder piston (32) slidably movable by actuation of a respective brake pedal (18a, 18b) to and between an active position and an inactive position. A spool (74) slidably disposed within a piston bore (70) of the master cylinder piston (32) is operable in a first mode to direct hydraulic fluid from a quick-fill chamber (62) to a master cylinder chamber (50) at a first pressure upon initial movement of the master cylinder piston (32) from the inactive position toward the active position. The spool (74) is operable in a second mode to direct hydraulic fluid from the quick-fill chamber (62) to a tank (20) when pressure in the master cylinder chamber (50) reaches a predefined threshold.

A braking circuit including at least an auxiliary right valve (200) and an auxiliary left valve (300) suitable to allow braking on both sides, right and left of a vehicle, when this is required, but allowing to apply a pressure braking only on one of the two sides, right or left, when this is required to provide a steering function, characterized in that the circuit further comprises a master valve (400) having two positions: a first position when the vehicle has a velocity under a threshold wherein separate and selective right or left braking is authorized and a second position when the vehicle has a velocity above said threshold wherein said master valve (400) connects both a right braking line (204, 1205) and a left braking line (304, 1305) to an output braking line (110) so that if a braking is requested both right braking line (204, 1204) and left braking line (304, 1305) are under pressure and selective right or left braking is forbidden.

A stroke-controlled balancing device for hydraulic braking systems, comprising a balancing duct, a normally closed balancing valve, configured, in use, to maintain a connection between the hydraulic braking system and the balancing duct either closed or open, a stem having an external surface and an internal surface. A balancing channel is provided on the internal surface of the stem, said channel being hydraulically connected to the balancing duct, and the balancing valve is configured to slide, in use, along the external surface of the stem in order to open the connection between the braking system and the balancing duct. A braking system comprising the balancing device, as well as a method of operation of the braking system, are also described.

A braking circuit including at least an auxiliary right valve (200) and an auxiliary left valve (300) suitable to allow braking on both sides, right and left of a vehicle, when this is required, but allowing to apply a pressure braking only on one of the two sides, right or left, when this is required to provide a steering function, characterized in that the circuit further comprises a master valve (400) having two positions: a first position when the vehicle has a velocity under a threshold wherein separate and selective right or left braking is authorized and a second position when the vehicle has a velocity above said threshold wherein said master valve (400) connects both a right braking line (204, 1205) and a left braking line (304, 1305) to an output braking line (110) so that if a braking is requested both right braking line (204, 1204) and left braking line (304, 1305) are under pressure and selective right or left braking is forbidden.

A master brake cylinder for a braking system of a vehicle is described, having a first pressure chamber. A first rod piston element is movable into at least a first partial pressure chamber of the first pressure chamber in such a way that a first partial residual volume of the first partial pressure chamber which is fillable with liquid is reducible by moving the first rod piston element. The master brake cylinder also includes a second partial pressure chamber of the first pressure chamber which is delimited from the first partial pressure chamber via at least one partial partition and into which a second rod piston element is movable in such a way that a second partial residual volume of the second partial pressure chamber which is fillable with liquid is reducible by moving the second rod piston element. Moreover, a manufacturing method is described for a master brake cylinder.

A brake booster and related method for its operation for a vehicle, having a master brake cylinder having a first primary piston chamber that is variable using an adjustable first primary piston component, a braking force transmission component, using which at least one driver braking force is transmittable by the adjustable first primary piston component contacted by the braking force transmission component, and an adjustable second primary piston component, the master brake cylinder having a second primary piston chamber that is variable using the adjustable second primary piston component, and the brake booster has a booster force transmission component, using which a booster force from the actuator device is transmittable at least partially to the adjustable second primary piston component contacted by the booster force transmission component, and the braking force transmission component in its force-free initial position is distanced by a first free play from the first primary piston component and/or the booster force transmission component, in its force-free initial position, is distanced by a second free play from the second primary piston component.

A control device having two brake master cylinders both of which may be simultaneously operated by the same single manual control lever according to a combined or integral braking mode is provided. A switching member associated with the manual control lever may exclude one of the two brake master cylinders.

A vehicle brake device includes a first electric motor, a first electrically powered cylinder device, a first electromagnetic valve, and a first pressure sensor serving as first elements, a second electric motor, a second electrically powered cylinder device, a second electromagnetic valve, and a second pressure sensor serving as second elements, and a circuit board in which a first sector in which a first circuit for controlling the first element is formed and a second sector in which a second circuit for controlling the second element is formed are arranged side by side. In the vehicle brake device, the first element controlled only by the first circuit is disposed so as to face the first sector, and the second element controlled only by the second circuit is disposed so as to face the second sector.