An electronic brake system may be capable of performing braking operation according to a pedal effort of a driver even when the brake system operates abnormally as well as simplifying a configuration thereof by minimizing the number of valves for controlling a flow of oil pressure and precisely controlling pressure therein.

To provide a brake control apparatus that brings a brake operating member to a proper position during antilock control. At least during operation of an antilock controller 105, valves 23 and 24 are actuated to impart a stroke to a piston 52P with hydraulic pressure generated by the pump 7.

The invention relates to an actuating system for a vehicle brake, with an actuating arrangement, in particular a brake pedal, at least one (first) piston-cylinder unit, which is connected via a hydraulic line to the vehicle brake (braking circuit) in order to supply the braking circuit with pressure medium and apply pressure to the vehicle brake, and with a drive for the piston-cylinder unit. According to the invention, pressure medium can be fed to the braking circuit in controlled manner in both piston movement directions, in particular the advance stroke and the return stroke, by means of at least one, in particular stepped, piston (10) of the piston-cylinder unit (10, 10a, 10b).

A vehicle reverse traveling speed limiting apparatus includes a fluid pressure detector, a brake driver, a limiting speed setter, and a reverse traveling speed controller. The fluid pressure detector detects a brake fluid pressure. The brake driver causes a main brake to perform braking based on a set instruction fluid pressure. The limiting speed setter sets a limiting speed upon reverse traveling. The reverse traveling speed controller executes torque and brake controls to allow an actual vehicle speed of a vehicle to be maintained at the limiting speed. When the actual vehicle speed is higher than the limiting speed, the reverse traveling speed controller sets the instruction fluid pressure to allow the actual vehicle speed to be converged to the limiting speed, and executes, even when the brake fluid pressure is higher than the instruction fluid pressure, the brake control to allow the instruction fluid pressure to be maintained.

A vehicle reverse traveling speed limiting apparatus includes a fluid pressure detector, a brake driver, a limiting speed setter, and a reverse traveling speed controller. The fluid pressure detector detects a brake fluid pressure. The brake driver causes a main brake to perform braking based on a set instruction fluid pressure. The limiting speed setter sets a limiting speed upon reverse traveling. The reverse traveling speed controller executes torque and brake controls to allow an actual vehicle speed of a vehicle to be maintained at the limiting speed. When the actual vehicle speed is higher than the limiting speed, the reverse traveling speed controller sets the instruction fluid pressure to allow the actual vehicle speed to be converged to the limiting speed, and executes, even when the brake fluid pressure is higher than the instruction fluid pressure, the brake control to allow the instruction fluid pressure to be maintained.

A brake system for a vehicle includes a first brake device for braking a first wheel of the vehicle, a second brake device for braking a second wheel of the vehicle, a first brake pedal which is paired with the first wheel, a second brake pedal which is paired with the second wheel, a brake control valve which is designed to act on the first brake device and/or the second brake device, a first control valve for controlling a brake pressure in the first brake device, and a second control valve for controlling a brake pressure in the second brake device. The brake system further has an electromechanical switching module in order to block or at least reduce a braking effect of the second brake device while the first brake pedal is being actuated, and the switching module is designed to block or at least reduce a braking effect of the first brake device while the second brake pedal is being actuated.

A vehicle braking system includes a brake associated with a respective wheel of the vehicle, a multi-pressure valve associated with the brake, and a controller electrically communicating with the multi-pressure valve. The multi-pressure valve receives fluid at a first pressure at a supply port and is capable of delivering the fluid at a delivery port at a plurality of pressure profiles. A control signal is transmitted to the multi-pressure valve. The multi-pressure valve delivers the pressurized fluid to the brake, via the delivery port, at one of the plurality of delivery pressure profiles based on the control signal.

A vehicle braking system includes a brake associated with a respective wheel of the vehicle, a multi-pressure valve associated with the brake, and a controller electrically communicating with the multi-pressure valve. The multi-pressure valve receives fluid at a first pressure at a supply port and is capable of delivering the fluid at a delivery port at a plurality of pressure profiles. A control signal is transmitted to the multi-pressure valve. The multi-pressure valve delivers the pressurized fluid to the brake, via the delivery port, at one of the plurality of delivery pressure profiles based on the control signal.

The disclosure relates to an electronically controlled pneumatic brake system for a utility vehicle, including a front-axle brake circuit with a single-channel front-axle modulator for the control of first and second front-axle service brake actuators, wherein first and second front-axle ABS valves are provided; a rear-axle brake circuit with a single-channel rear-axle modulator for the control of first and second rear-axle service brake actuators, wherein first and second rear-axle ABS valves are provided; a braking-value sensor which has an electrical terminal for the provision of an electronic brake demand signal; and a central electronic control unit which receives the electronic brake demand signal and controls the front-axle and rear-axle modulators. Here, it is provided that the central electronic control unit is formed as a structural unit with the rear-axle modulator and/or the front-axle modulator.

The brake control device comprises a control mode selecting portion 64 which selects one control mode based on a detection result of the detecting portion from a control mode group including at least two control modes which are a responsiveness priority mode which gives more priority to a responsiveness of the braking force relative to an operation of a brake operating member than to a suppression of an operating noise occurred upon the generation of the preparatory hydraulic pressure and a serenity priority mode which gives more priority to the suppression of the operating noise than to the responsiveness of the braking force. The hydraulic pressure control portion controls the hydraulic pressure generating device to generate the preparatory hydraulic pressure in response to the control mode selected by the control mode selecting portion.