Disclosed is a brake system. The brake system includes a pulsation attenuation device configured to attenuate pressure pulsation of brake oil discharged from a pump, wherein the pulsation attenuation device includes a first damping device, wherein the first damping device includes: a first damping member inserted into a first bore in communication with an in-port through which brake oil is introduced and an out-port through which brake oil is discharged and having a hollow formed therein; a second damping member inserted into the hollow to form a damping space between the second damping member and an inner circumferential surface of the first damping member; and a sealing member coupled to the first damping member and configured to seal the first bore, wherein the damping space is formed by a plurality of grooves formed in the hollow.

A control device for a vehicle brake system, having a control device/arrangement by which a closing signal is outputtable to an isolation valve via which a first brake circuit is hydraulically connected to a main brake cylinder, and at least one first control signal is outputtable to at least one first hydraulic component, so that a first actual brake pressure in the first brake circuit can be varied, an existing functional impairment of the at least one first hydraulic component and/or of at least one further brake system component being determinable, or a warning signal being receivable, and, if warranted, a closing signal being outputtable to a changeover valve of a second brake circuit, and, after or simultaneously with an outputting of the closing signal to the changeover valve, an opening signal being outputtable to the isolation valve. Also described is a related method for operating the vehicle brake system.

A method for operating a braking assistance system of a vehicle, wherein the braking assistance system assists a braking of the vehicle by a vehicle braking device in the event of a hazard braking. To differentiate between the hazard braking and a normal braking, at least two variables, representing a braking demand of a driver of the vehicle, are ascertained and a threshold value is established for each variable wherein hazard braking is recognized when at least the two variables exceed their particular threshold value, whereupon an automated braking intervention by the braking assistance system is initiated with the aid of the vehicle braking device. Furthermore, at least one driving-situation variable representing the instantaneous driving situation of the vehicle is ascertained and the at least two threshold values are changed depending on the at least one driving-situation variable.

A parking lock apparatus includes a parking gear rotatable together with a rotating body of a transmission. A slider is to be switched between a parking lock position in which a parking pawl is in engagement with the parking gear and a parking release position in which the parking pawl is out of engagement with the parking gear. A hydraulic circuit includes a third oil passage through which a first line pressure is applied to push the slider toward the parking release position, a fourth oil passage through which a second line pressure is applied to push the slider toward the parking lock direction, and a hydraulic cut valve provided in the third oil passage to be opened when a difference between the first line pressure and the second line pressure is higher than or equal to a threshold pressure when applying line pressure to the hydraulic circuit is started.

A parking lock apparatus includes a parking gear rotatable together with a rotating body of a transmission. A slider is to be switched between a parking lock position in which a parking pawl is in engagement with the parking gear and a parking release position in which the parking pawl is out of engagement with the parking gear. A hydraulic circuit includes a third oil passage through which a first line pressure is applied to push the slider toward the parking release position, a fourth oil passage through which a second line pressure is applied to push the slider toward the parking lock direction, and a hydraulic cut valve provided in the third oil passage to be opened when a difference between the first line pressure and the second line pressure is higher than or equal to a threshold pressure when applying line pressure to the hydraulic circuit is started.

A parking lock apparatus includes an engaging mechanism, a slider, a hydraulic circuit, and a processor. The engaging mechanism is to prevent a rotation of a rotating body when the engaging mechanism is in a mechanical engagement state. The slider is to switch a state of the engaging mechanism between the mechanical engagement state and a mechanical disengagement state in accordance with a position of the slider. The hydraulic circuit is to change the position of the slider. The processor is configured to increase line pressure in the hydraulic circuit when the engaging mechanism is in the mechanical engagement state.

A brake unit (1) includes: a master cylinder (2) unit which is fixed to a vehicle body, and which includes a master cylinder (2b) that is received within a first housing (20), and that is arranged to be interlocked with a brake pedal; and a pump unit (3) which is arranged to be driven by a motor (3), and which includes a second housing (30) within which a pump arranged to increase a wheel cylinder pressure is received, the master cylinder unit (2) and the pump unit (3) being integrally fixed through a mount (6) which is an elastic member.

A piston assembly for a pressure-generating device of a braking system of a motor vehicle, including a piston, which is at least partially insertable into an opening formed in a hydraulic unit of the braking system and is axially displaceable therein, and including a ball screw for axially displacing the piston. The piston is connected to the axially displaceable spindle of the ball screw in such a way that the piston moves along with the axially displaceable spindle of the ball screw, the piston enclosing at least one first portion of the nut in a first, retracted position of the piston and the piston enclosing at most one second portion of the nut in a second, extended position of the piston, and the first portion is larger than the second portion.

At least one embodiment of the present disclosure provides an electric hydraulic brake apparatus including a reservoir, a plurality of wheel brake mechanisms, a main braking system, and an auxiliary braking system, wherein the auxiliary braking system includes a first hydraulic pressure input unit and a second hydraulic pressure input unit, a third hydraulic pressure input unit configured to receive brake fluid from the main braking system without passing through booster valves, a first inlet line and a second inlet line configured to transfer a hydraulic pressure between the main braking system and the plurality of wheel brake mechanisms, and a split line configured to receive and supply the brake fluid delivered from the third hydraulic pressure input unit to the plurality of wheel brake mechanisms.

Notifying a driver of a number of hydraulic pressure support events. In one example, a system includes a parking brake assembly; a human-machine interface; and a parking brake electronic processor configured to generate a command to apply one or more braking components of the parking brake assembly to at least one wheel of the vehicle and generate a request for additional hydraulic pressure support. The system also includes a host electronic processor configured to receive the request for additional hydraulic pressure support; generate a command to build extra hydraulic pressure; and provide the command to the pump motor. The host electronic processor is also configured to increment a counter indicating a number of hydraulic pressure support events performed; compare the counter to a threshold value; and provide an alert to the driver via the human-machine interface when the counter exceeds the threshold value.