A brake control apparatus for construction machinery, includes first and second brake lines through which a brake oil is supplied to a front brake device and a rear brake device of the construction machinery, first and second proportional flow control valves installed respectively in the first and second brake lines to control a flow rate of the brake oil in proportion to inputted first and second brake control signals, a sensing portion configured to detect work and travel information of the construction machinery, and a controller configured to output the first and second brake control signals in response to a brake manipulation signal of a driver, and configured to control independently the first and second proportional flow control valves based on the work and travel information of the construction machinery detected by the sensing portion.

Methods, devices, and systems for communicating a brake pedal input to a brake without a physical connection through a firewall of a vehicle is provided. The position of the pedal is detected and electronically communicated to a control unit that causes the brake to slow the rotation of a wheel and inhibit the movement of a vehicle. In addition, the driver can select a pedal force profile to provide a preferred pedal feel for the driver. The brake system and the control unit can also compensate for additional loads in or attached to the vehicle such as a trailer. For example, the control unit cases the brake to activate with an increased force so the vehicle slows at the same rate and with the same pedal feel for the driver, even with an additional load. Further features and details are described herein.

Disclosed herein is an electronic brake system. The electric brake system includes a pedal operator connected to a brake pedal and configured to transmit a braking intention to an electronic control unit; a reservoir configured to store a working fluid; a pressure supplier provided with a driver providing a power, and configured to generate a hydraulic pressure of a plurality of wheel brakes; and a braking pressure regulator configured to regulate a hydraulic pressure, which is generated by the pressure supplier and transmitted to the wheel brake, wherein the braking pressure regulator includes a first hydraulic circuit hydraulically connected to two wheel brakes and a second hydraulic circuit hydraulically connected to the other two wheel brakes, wherein the first hydraulic circuit and the second hydraulic circuit are provided with a plurality of inlet lines connecting the pressure supplier to each of the wheel brake, and a plurality of outlet lines connecting each of the wheel brake to the reservoir or connecting each of the wheel brake to the pedal operator, wherein the first hydraulic circuit and the second hydraulic circuit are hydraulically separated from each other to regulate a hydraulic pressure, which is transmitted to the wheel brake by the other hydraulic circuit when any one hydraulic circuit operates abnormally.

A method for operating a brake system of a motor vehicle includes actuating at least one of a first actuation device and a second actuation device of the brake system, and, in the event of a fault in a hydraulic brake device of the brake system, producing an electromechanical braking force via an electromechanical brake device of the brake system for decelerating the motor vehicle, irrespective of which of the first actuation device and the second actuation device is actuated.

A hydraulic actuator for supplying a hydraulic brake pressure to service brakes of a vehicle includes an actuator cylinder including a piston. A hydraulic working pressure of a brake fluid can be set in accordance with a position of the piston. The brake fluid is supplied from a hydraulic reservoir assigned to the hydraulic cylinder, and the hydraulic working pressure prevails in a working space of the actuator cylinder and can be output via an actuator output port on the actuator cylinder in order to supply a hydraulic brake pressure in accordance with the hydraulic working pressure. The hydraulic actuator further includes an electrically controllable motor. A rotary motion brought about by the electrically controllable motor can be converted by a conversion mechanism into a translational motion of the piston parallel to a longitudinal direction thus enabling a hydraulic brake pressure to be supplied by electric control of the motor.

The disclosure provides a trailer brake system that includes a sensor system and a brake control unit. The sensor system is supported by a trailer and includes at least one wheel speed sensor associated with each wheel of the trailer. The brake control unit is supported by the trailer and is in communication with a tow vehicle configured to tow the trailer. The brake control unit is configured to: receive sensor data from the sensor system, and receive a brake signal from the tow vehicle indicative of a driver pressing a brake pedal of the tow vehicle. The brake control unit is also configured to: determine, for each brake, a hydraulic pressure based on the sensor data and the brake signal; and apply pressure by way of brake lines to the brake associated with each wheel, based on the hydraulic pressure.

A control unit for at least one vehicle deceleration device of a vehicle. The control unit includes an electronics unit including a memory unit in which a characteristic curve is stored which specifies a relation between a first input variable specified by an operation of a brake actuation element of the vehicle, and a setpoint variable regarding a setpoint vehicle deceleration exerted on the vehicle using the at least one vehicle deceleration device. The electronics device newly specifies at least one characteristic curve value of the characteristic curve under consideration of a second input variable specified by the driver by an operation of an accelerator of the vehicle, a current traffic and/or environment situation, and/or an ascertained position of the vehicle and a position-specific item of traffic and/or environment information, and the correspondingly modified characteristic curve is stored in the memory unit.

A braking control device for a vehicle is provided, which includes an operating amount detecting part configured to detect an operating amount of a brake pedal, a reaction-force giving part configured to generate a reaction force of the brake pedal, a braking-force generating part configured to generate a braking force for wheels according to the brake pedal operating amount, and an electronic control unit (ECU) electrically connected with them. The ECU includes a processor configured to control the giving part and generating part, and set a braking rigidity characteristic based on a braking rigidity that is a ratio of the reaction force to the operating amount, and a vehicle deceleration. The ECU sets a braking rigidity value so that the braking rigidity value increases as the vehicle deceleration becomes larger. The ECU controls the reaction-force giving part based on the braking rigidity value.

A multiple-circuit hydraulically open braking system, for a highly automated or autonomous vehicle, includes at least two wheel brakes each assigned to a braking circuit having a pressure relief path, two multiple-circuit pressure generators hydraulically connected in series between a fluid container and the at least two wheel brakes, and a hydraulic unit for hydraulically connecting the pressure generator to the at least two wheel brakes and for individual brake pressure modulation in the at least two wheel brakes. A first pressure generator is configured as a plunger system and is assigned to a main system having a first energy supply and a first evaluation and control unit. A second pressure generator is configured as a second plunger system or as a pump system and is assigned to a secondary system having a second energy supply that is independent from the first energy supply and a second evaluation and control unit.

A braking control device comprising: an operation amount acquisition device that obtains an operation amount for a braking operation member; a pressurizing unit that presses a friction member to a rotating member fixed to a wheel using an electric motor; a control that controls output of the electric motor based on the operation amount; a pressing force acquisition device that obtains the actual pressing force of the friction member pressing on the rotating member; and a rotation angle acquisition device that obtains the actual rotation angle of the motor. The control: stores the correlation between the actual pressing force and the actual rotation angle; approximates a function map indicated by a second degree or higher polynominal, based on the correlation; calculates a target rotation angle based on the operation amount and the function map; and controls the electric motor to match actual rotation angle and the target rotation angle.