A method and system is provided for determining faults in a vehicle brake system. An electronic processor obtains a brake pedal signal from a brake pedal that indicates a driver intent to brake and obtains a vehicle braking response condition signal from a brake system feedback sensor. The electronic processor determines a fault state when (1) the brake pedal signal is indicative of no brake pedal movement and the vehicle braking response signal is indicative of a vehicle braking response occurring, or when (2) the brake pedal signal is indicative of brake pedal movement and the vehicle braking response condition signal is indicative of no occurrence of a vehicle braking response. The electronic processor controls an output of an audio or visual indication of a fault state and/or controls braking operation of the vehicle in response to the fault state.

A control method is for a braking system that includes an electronically controlled mechanical brake with a first motor and a second motor. The method includes detecting a pedal stroke and determining a total required braking torque based on a pedal stroke/total braking torque curve, distributing the total braking torque to the first motor and the second motor to determine a target torque for the first motor and a target torque for the second motor, and driving the first motor and the second motor to operate based on the target torques. The method further includes monitoring an operating current and a rotational speed of the first motor and the second motor, and using motor characteristic curves of the first motor and the second motor to calculate a first computed output torque and a second computed output torque.

A brake pedal assembly comprising a pedal and a pedal resistance force member operably coupled to the pedal. A damper pedal resistance force module defines an interior fluid-filled cavity. A shaft extends through the damper module and includes a piston mounted thereon and moveable through the fluid-filled cavity to generate a damper resistance force. A spring pedal resistance force module is adapted to generate a spring pedal resistance force. A pedal force sensing module is mounted to the pedal resistance force member. A pedal position sensor is mounted to the pedal resistance force member. A pedal force sensor is mounted to the pedal resistance force member.

Provided is a brake control apparatus mounted in a vehicle with a plurality of wheels, the brake control apparatus including: a actuator configured to apply a braking torque to the plurality of wheels; and a controller configured to control the actuator to apply a first braking torque to a first wheel of the plurality of wheels, based on a spin of the first wheel being greater than or equal to a target spin, and to control the actuator to apply a second braking torque to the plurality of wheels based on a displacement of a brake pedal of the vehicle while applying the first braking torque to the first wheel, wherein the controller stepwise or linearly increases a braking torque applied to a second wheel of the plurality of wheels up to the second braking torque.

The present invention relates to a brake system for a vehicle. The proposed brake system (1) comprises an actuation unit for actuating wheel brakes of the vehicle in a normal operating mode of the brake system (1). Further, the system (1) comprises a brake cylinder (2) for pressurizing the wheel brakes of the vehicle in an emergency operating mode of the brake system (1). The brake cylinder (2) comprises a brake cylinder housing (4) and a push rod (3) being displaceable within the brake cylinder housing (4) by operation of a brake pedal (5). The brake cylinder (2) further comprises a piston (14) movably arranged within the brake cylinder housing (4). The piston (14) has a first surface and a second surface opposite the first surface. A hydraulic chamber (11) is formed within the brake cylinder housing (4) between the first surface of the piston (14) and an inner surface of the brake cylinder housing (4). The hydraulic chamber (11) is configured for being selectively fluidly connected with the wheel brakes. The brake cylinder (2) further comprises an elastic simulator element (13) arranged between the second surface of the piston (14) and the push rod (3) for pedal feel simulation. The brake cylinder (2) further comprises a locking element (22) configured to selectively mechanically couple the push rod (3) with the piston (14) to provide a rigid connection between the push rod (3) and the piston (14) during the emergency operating mode.

A brake system and a method of controlling the brake system including a pedal master unit, an electric booster unit, a pedal-feel generating unit, and an electric control unit, wherein the pedal master unit includes a master cylinder and an operating rod, the electric booster unit includes a motor, a motor piston, and a gear device-screw shaft combination, the pedal-feel generating unit includes a reaction disk configured to form a pedal feel force (F.sub.RD) and a pedal spring arranged to form a pedal feel force (F.sub.spring), and the electric control unit is configured to variably control, in a regenerative braking mode and in a hydraulic braking mode, a ratio of increase to decrease of the pedal feel force (F.sub.RD) and a ratio of increase to decrease of the pedal feel force (F.sub.spring).

A system in which the device connecting the brake pedal to the brake actuator includes a control rod and a thrust rod guided in a cylinder, connected to the rod by a ball joint and returned by a spring. The end of the rod comprises a spherical cap having a spherical front bearing surface and a flat rear surface, perpendicular to the axis of the rod. A centering sleeve freely surrounding the control rod presses with its front edge against the rear face of the cap, pushed by a centering spring bearing on the thrust rod and on the centering sleeve to tilt the spherical cap and the rod toward the axis of the thrust rod.

A brake system for a motor vehicle, including at least one wheel brake which can be actuated by a pressure build-up in a brake line on the wheel brake side, a brake pedal, a sensor for detecting actuation information relating to actuation of the brake pedal, a brake actuator for generating a brake pressure in a brake actuator-side brake line, and a controller by which, in a first operating mode of the brake system, the brake actuator is controlled as a function of the actuation information, at least in the first operating mode, the brake line on the wheel brake side being fluidly coupled to the brake line on the brake actuator side.

A method for operating an off-road speed control system of a vehicle is provided. The method comprises identifying a pattern or change in at least one component of vehicle drag. The method further comprises monitoring vehicle speed to predict where a change in the at least one component of vehicle drag may result in a speed overshoot event or a speed undershoot event. The method still further comprises, in response to the predicted speed overshoot event or speed undershoot event, automatically commanding the application of an appropriate opposing torque to one or more wheels of the vehicle to counteract the predicted speed overshoot or undershoot. An off-road speed control system for a vehicle comprising an electronic control unit (ECU) configured to perform the above-described methodology is also provided.

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, and an ECU electrically connected with them and configured to control the reaction-force giving part and the braking-force generating part, and set a braking characteristic in which the reaction force according to a stepping force of the brake pedal and a deceleration of the vehicle have a logarithmic relationship, and when the reaction force is above a given reaction force. The ECU controls the braking-force generating part based on the braking characteristic while making the deceleration for the reaction force higher than the logarithmic relationship.