An electronic brake system includes: a master cylinder connected to a brake pedal; a hydraulic pressure supply device including a motor that generates a rotational force and a hydraulic piston movably accommodated in a pressure chamber, and configured to generate a hydraulic pressure by a movement of the hydraulic piston; a hydraulic control unit configured to control a flow of the hydraulic pressure transferred to a wheel cylinder from the hydraulic pressure supply device; a hydraulic block in which the master cylinder, the hydraulic pressure supply device and the hydraulic control unit are integrated; and a controller configured to control the motor and the hydraulic control unit, wherein, during an anti-lock braking system (ABS) operation, the controller is configured to generate vibration in the motor by supplying the motor with an excitation current for exciting the motor to notify a driver of the ABS operation by vibration of the brake pedal.

The present invention comprises: a piston provided in a cylinder hole; a lid member which closes an opening on the other side of the cylinder hole; and elastic members and which are provided between the piston and the lid member. The elastic members and comprise a first elastic member provided on the piston side of the cylinder hole, and a second elastic member provided on the lid member side of the cylinder hole. The second elastic member has a base portion provided in line with the first elastic member, and a protruding portion protruding from the piston side end surface of the base portion. When the piston has moved in the axial direction to the lid member side, the protruding portion touches the piston, undergoing compressive deformation, and the base portion subsequently undergoes compressive deformation.

Disclosed herein a brake apparatus may include a first motor configured to provide a rotational force to a first brake to brake a first wheel of a vehicle; a first drive configured to control a driving current of the first motor; a second motor configured to provide a rotational force to a second brake to brake a second wheel of the vehicle; a second drive configured to control a driving current of the second motor; a first processor connected to the first and second drives through a first network; and a second processor connected to the first and second drives through a second network separated from the first network.

A vehicle braking system including a control unit (340) which is operable to communicate with at least one sensor (320, 350), the sensor (320, 350) being operable to provide signals corresponding to a characteristic of a vehicle to the control unit (340), and the control unit (340) being in communication with a brake demand source (300) to receive brake demand data, and the control unit (340) also being in communication with a plurality of wheel end units, each wheel end unit including a brake torque control unit (310) which is operable to control an associated brake actuator to apply a braking torque dependent upon a signal received from the control unit (340).

A method includes steps for controlling a pneumatic braking system of a trailer vehicle which is connected to a tow vehicle equipped with a hydraulic or pneumatic braking system. At the start of an actuation of the foot brake valve, an electrical switch is closed or opened, and a switching signal is transmitted to an electronic control unit as a braking start signal for an incipient braking process. A brake value sensor detects a brake value representative of the drivers current deceleration request and transmits the brake value to the electronic control unit as a brake value signal. The brake value sensor is used for determining the incipient braking process, and a backup valve is only deactivated by switching a redundancy valve from an open position to a blocking position if the brake value signal detected by the brake value sensor has reached or exceeded a predefined minimum signal value.

A pedal feel emulator comprises a housing extending along a center axis between a closed end and an opened end and defining a chamber extending therebetween. A first piston is slidably disposed in the chamber. The first piston defines a compartment in fluid communication with the chamber. A second piston is slidably disposed in the compartment. A spring seat extends radially outwardly from the second piston. A first elastic member is located in the chamber extending between the spring seat and the closed end. A second elastic member is located in the compartment and extending between the spring seat and the first piston. A third elastic member is located between the second piston and the first piston. A brake system including the pedal feel emulator is also disclosed herein.

A simulator valve includes a housing having a pedal simulator passage and a master cylinder passage extending therethrough. The master cylinder passage is located longitudinally between the first housing surface and the pedal simulator passage. An armature is located at least partially within the housing for selective longitudinally reciprocating motion with respect thereto between first and second armature positions. A poppet is located within the housing for selective longitudinally reciprocating motion with respect thereto between first and second poppet positions. The poppet defines a first valve and a second valve the poppet includes a poppet bore extending longitudinally therethrough and selectively occluded by the first valve. A damped flow fluid path selectively permits fluid communication therethrough from the master cylinder passage to the pedal simulator passage. A free flow fluid path selectively permits fluid communication therethrough from the pedal simulator passage to the master cylinder passage.

Provided is an check valve. The check valve comprising a plurality of valve parts in which an internal flow path is selectively open/closed by opening/closing members, wherein the plurality of the valve parts are stacked in a line. And the check valve further comprising a cylinder-shaped valve housing open on one side, wherein each opening/closing member of the plurality of valve parts is received from the open one side of the valve housing.

A method for checking functionality of a motor vehicle braking system. The braking system has a main module, including: hydraulically actuatable wheel brakes, pairs being assigned to respective brake circuits; at least one electrically actuatable wheel valve per wheel brake sets wheel-specific brake pressures; a pressure provision device actively builds up pressure in the wheel brakes; a pressure-medium reservoir at atmospheric pressure, and an auxiliary module, which has for each of two wheel brakes: a pressure sensor for measuring pressure in a wheel brake line; an open when deenergized isolating valve in the wheel brake line; a pump. At least one variable is measured to assess functionality of the braking system. Using least one acceptance criterion, and checked whether the variable satisfies the acceptance criterion. Determining at least one variable representing the viscosity of the brake fluid, and the at least one acceptance criterion depends on a variable representing viscosity.

For a tank truck using an EBS, the present invention provides a tank truck rollover relieved control method based on electronic braking deceleration. Firstly, a tank truck rollover scene applicable to the relieved control method is defined; then, a least square method is adopted to establish a characterization function of tank truck braking deceleration; and finally, tank truck rollover relieved control is achieved on the basis of the characterization function of the braking deceleration and the EBS. The method fits out a function expression of the tank truck braking deceleration and can automatically select a proper braking deceleration under different rollover scenes according to kinematics information of the tank truck and vehicle body information; during tank truck braking deceleration, an operation of a driver is considered, so that man-machine effective combination is achieved; and relieved braking deceleration is conducted when the tank truck is in a potential rollover risk state, a situation that emergency braking is conducted when the tank truck has high rollover risk is avoided, and tank truck rollover control stability and effectiveness are improved.