An object of the present invention is to provide a brake apparatus capable of acquiring a desired brake hydraulic pressure when an opening failure has occurred in a shut-off valve. The brake apparatus includes a first pump configured to supply brake fluid to a hydraulic circuit connecting a master cylinder and a wheel cylinder to each other, a first shut-off valve provided between a discharge portion of the first pump in the hydraulic circuit and the master cylinder, and a second shut-off valve provided between the first shut-off valve and the master cylinder.

An object of the present invention is to provide a brake apparatus capable of acquiring a desired brake hydraulic pressure when an opening failure has occurred in a shut-off valve. The brake apparatus includes a first pump configured to supply brake fluid to a hydraulic circuit connecting a master cylinder and a wheel cylinder to each other, a first shut-off valve provided between a discharge portion of the first pump in the hydraulic circuit and the master cylinder, and a second shut-off valve provided between the first shut-off valve and the master cylinder.

A vehicle includes a brake pedal, a master cylinder, a braking circuit with a wheel cylinder, and a brake pressure generator with strokable piston. A pedal feel simulator is coupled to the master cylinder through a switchable valve, the simulator providing a reaction force. An isolation valve closes to isolate the braking circuit from the master cylinder and the simulator circuit. A controller is programmed to place the simulator in fluid communication with an output of the brake pressure generator, and to stroke the piston at a designated diagnostic time. The resulting pressure increase is observed, and the controller checks whether the pressure-increase to piston-stroke relationship is within a predetermined acceptable range for continued operation of a brake-by-wire mode in which the master cylinder is coupled to the simulator circuit and decoupled from the braking circuit.

The present disclosure includes a system, method, and device related to controlling brakes of a towed vehicle. A brake controller system includes a brake controller that controls the brakes of a towed vehicle based on acceleration. The brake controller is in communication with a speed sensor. The speed sensor determines the speed of a towing vehicle or a towed vehicle. The brake controller automatically sets a gain or boost based on the speed and acceleration.

Provided is an electric brake device that is able to achieve redundancy when an abnormality occurs in a load sensor, without increasing the size of the load sensor. The electric brake device includes a brake rotor, a friction pad, an electric motor, a transmission mechanism, braking force command section, braking force estimation section, motor rotation angle detector, and a controller. The braking force estimation section includes a load sensor configured to detect elastic deformation of a determined member forming the electric brake device. The controller includes sensor abnormality detector configured to store a sensor output of the load sensor at a motor rotation angle at which a braking force becomes zero, and infer the occurrence of plastic deformation in the load sensor from transition of the stored sensor output.

Provided is an electric brake device that is able to achieve redundancy when an abnormality occurs in a load sensor, without increasing the size of the load sensor. The electric brake device includes a brake rotor, a friction pad, an electric motor, a transmission mechanism, braking force command section, braking force estimation section, motor rotation angle detector, and a controller. The braking force estimation section includes a load sensor configured to detect elastic deformation of a determined member forming the electric brake device. The controller includes sensor abnormality detector configured to store a sensor output of the load sensor at a motor rotation angle at which a braking force becomes zero, and infer the occurrence of plastic deformation in the load sensor from transition of the stored sensor output.

A motor vehicle having a tubular frame, an engine, and a brake modulation system comprising sensors and a modulator includes a bracket that includes a bracket body, at least one body attachment point, and at least one bracket fastener for attaching the bracket body to the tubular frame at the at least one body attachment point. The motor vehicle also includes a cover that includes a cover body, at least one cover attachment point, at least one cover fastener for attaching the cover body to the bracket at the at least one cover attachment point, and wherein the modulator is attached to the bracket and is covered by the cover.

A method for controlling brakes is provided. The method comprises detecting an imminent skid by an anti-skid controller/deceleration controller (ASK/DK). The ASK/DK outputs at least one of a negative desired pressure command to a pressure control unit (PK) in response to detecting the imminent skid and causes a current command output from the PK to be reduced to release braking pressure if the negative desired pressure command minus a measured feedback pressure is greater than a deadband of the PK or outputs a negative desired force command to a force control unit (ForK) in response to detecting the imminent skid and causing a current command output from the ForK to be reduced to release braking force if the negative desired force command minus a measured feedback force is greater than a deadband of the Fork. A brake control system is also provided.

A method for controlling brakes is provided. The method comprises detecting an imminent skid by an anti-skid controller/deceleration controller (ASK/DK). The ASK/DK outputs at least one of a negative desired pressure command to a pressure control unit (PK) in response to detecting the imminent skid and causes a current command output from the PK to be reduced to release braking pressure if the negative desired pressure command minus a measured feedback pressure is greater than a deadband of the PK or outputs a negative desired force command to a force control unit (ForK) in response to detecting the imminent skid and causing a current command output from the ForK to be reduced to release braking force if the negative desired force command minus a measured feedback force is greater than a deadband of the Fork. A brake control system is also provided.

A motor vehicle having a tubular frame, an engine, and a brake modulation system comprising sensors and a modulator includes a bracket that includes a bracket body, at least one body attachment point, and at least one bracket fastener for attaching the bracket body to the tubular frame at the at least one body attachment point. The motor vehicle also includes a cover that includes a cover body, at least one cover attachment point, at least one cover fastener for attaching the cover body to the bracket at the at least one cover attachment point, and wherein the modulator is attached to the bracket and is covered by the cover.