An electronic vehicle stability control system includes a hydraulic braking circuit having a plurality of electronically controlled valves, a plurality of pumps, a motor that operates the plurality of pumps, and a suction throttle valve that throttles flow of hydraulic fluid to at least one of the plurality of pumps. The electronic vehicle stability control system also includes a controller coupled to the hydraulic braking circuit that controls the plurality of electronically controlled valves.

The present disclosure in some embodiments provides a brake apparatus for a vehicle, comprising: a reservoir configured to store a working fluid; a master cylinder connected to the reservoir; a hydraulic circuit connected to a wheel brake; a primary brake unit configured to supply a hydraulic pressure to the wheel brake through the hydraulic circuit; and a secondary brake unit configured to supply a hydraulic pressure to the wheel brake through the hydraulic circuit, wherein the hydraulic circuit comprises: a first hydraulic circuit coupled to the reservoir, the master cylinder, and the secondary brake unit; a second hydraulic circuit coupled to the reservoir and the primary brake unit; and a third hydraulic circuit coupled to the primary brake unit, the secondary brake unit, and the wheel brake.

For operation of a hydraulic power vehicle braking system for autonomous driving, a brake pressure is generated using a second power brake pressure generator if, after a predefined first time span, no brake pressure or insufficient brake pressure has been generated using a first power brake pressure generator. The generation of the brake pressure using the second power brake pressure generator is aborted if, within a second time span, which is longer than the first time span, no error message is present from the first power brake pressure generator.

In a system including a reservoir tank RSV integral with a master cylinder M/C, an inlet fluid passage 16 for connecting an inlet portion 22 of a pump P to the reservoir tank RSV, a pressure reducing fluid passage 32 that connects the inlet fluid passage 16 to wheel cylinders W/C and a normally closed pressure reducing vale 30 that is connected to the pressure reducing fluid passage 32 and opened when it is intended to depressurize a brake fluid to in the wheel cylinders thereby to return the brake fluid to the reservoir tank through the inlet fluid passage 16, there is employed a normally closed reservoir shutting valve 31 that is connected to the pressure reducing valve 30 in series with respect to the wheel cylinders W/C and the reservoir tank RSV.

The present disclosure provides a braking method of a vehicle, comprising: a control start determination operation of determining whether traction control system (TCS) control is needed; a required pressure calculation operation of calculating required pressures, which are required for wheel brakes to brake a vehicle, of wheels when it is determined that the TCS control is needed; a control mode determination operation of determining whether the TCS control is performed in a single wheel control mode or multi-wheel control mode; and a hydraulic pressure supply operation of supplying hydraulic pressure to a low-pressure wheel brake through valve control and supplying hydraulic pressure to a high-pressure wheel brake through pressure control in the multi-wheel control mode and supplying hydraulic pressure to any one wheel brake through the valve control in the single wheel control mode in order for the wheel brakes to reach the required pressures.

An apparatus for controlling an ABS of an ESC integrated brake system and a method thereof. The apparatus includes a main master cylinder generating hydraulic brake pressure through a piston that is moved forward/backward by an actuator that is operated when a brake pedal of a vehicle is pressed down; and a controller controlling forward/backward movement direction change of the piston by controlling a driving current that is applied to the actuator by determining whether a direction change condition according the control state of wheel pressure is satisfied, when a brake mode of the vehicle is an ABS mode and the piston has reached a predetermined direction change position for forward/backward movement direction change.

A brake fluid pressure control device for a vehicle that includes a wheel speed obtaining device to obtain wheel speed, and a vehicle body deceleration calculating means to calculate a vehicle body deceleration on the basis of the wheel speed. If a condition is satisfied in which the vehicle body deceleration continues to stay at a low rate of less than or equal to a predetermined threshold value for a predetermined period of time, the pressure increasing rate in pressure increasing control is altered to a higher value than before the condition is satisfied. The brake fluid pressure of a brake caliper can quickly be brought close to the fluid pressure of a master cylinder. Therefore, it is possible to improve the brake responsiveness when the brake is re-operated by the driver during the ABS control, thereby reducing the driver's feeling of wrongness and strangeness.

A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.

A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.

A braking control device is provided to automatically control a main braking device normally used to brake a host vehicle during travel and a second braking device used to maintain the host vehicle in a stopped state. The braking control device has a slip degree prediction unit and a braking device switching unit. The slip degree prediction unit predicts a possibility that the host vehicle will slip. The braking device switching unit is configured to delay a timing with which to start a reduction in a braking force of the main braking device if the slip degree prediction unit predicts a slip when switching the main braking device to the second braking device.