A vehicle braking force control device includes a braking force control unit. The braking force control unit is configured to shift to a drive state so as to use an auxiliary power source when a main power source fails, and to limit current outputted to an electric actuator of a braking device for producing braking hydraulic pressure when a transition is made to the drive state using the auxiliary power source. The braking force control unit has two current limit values used during actuation of the electric actuator by the auxiliary power source, the current limit values being a first current limit value for ensuring increased-braking-hydraulic-pressure characteristics, and a second current limit value for ensuring a necessary minimum braking hydraulic pressure, the second current limit value being less than the first current limit value.

A steering system which is capable of being controlled by a redundant brake system, which includes a primary brake control module, a secondary brake control module, and a plurality of brake units controlled by the primary brake control module or the secondary brake control module. There is at least one hydraulic motor connected to a component of the steering system, and the fluid pressure in the hydraulic motor is controlled by the secondary brake control module. The wheels of the steering system are configured to make a right-hand turn when the secondary brake control module operates the hydraulic motor during a first mode of operation, and the wheels of the steering system are configured to make a left-hand turn when the secondary brake control module operates the hydraulic motor during a second mode of operation.

A brake system includes a service brake and a parking brake that brake a vehicle including a lift axle capable of ascending and descending. The brake system further includes a brake blocker device and a controller that controls the brake blocker device. The brake blocker device blocks at least one of supply of compressed air to the service brake and supply of compressed air to the parking brake. The service brake and the parking brake act on the lift axle. The controller actuates the brake blocker device when the lift axle is at a lifted position.

The braking control device for controlling a master cylinder device includes a housing, an output piston, an input piston, a separation chamber opening and closing portion, and a driving hydraulic pressure generating portion, and is provided with an operation control for controlling the master cylinder device in an operation force operating state (regulator mode) in which the output piston is driven by operation force on a brake operation member and in a driving hydraulic pressure operating state (linear mode) in which the output piston is driven by driving hydraulic pressure from the driving hydraulic pressure generating portion; a brake operation judgment portion for judging the presence or absence of a brake operation and the probability thereof and a state transition limiter for limiting at least one of state transitions between the operating states when the presence of the brake operation and possibility thereof is determined.

The present disclosure relates to a vehicle having a braking system and a method of engaging the braking system. The braking system engages a brake mechanism as a waiting brake. The vehicle has a dual function device which is configured such that when the dual function device is activated when the vehicle transmission system is in a drive mode, the transmission system is maintained in that drive mode, and when the dual function device is activated when the transmission system is in the neutral mode, the brake mechanism is engaged.

Disclosed is a brake control apparatus including a master cylinder that generates a hydraulic braking pressure in response to operation of a brake pedal, an electric motor that drives the master cylinder, a housing in which the master cylinder and the electric motor are assembled, and a control unit adapted to perform drive control of the electric motor. The control unit has a bottom formed at least partially integral with the housing and includes a circuit board mounting thereon drive elements to drive the electric motor. The brake control apparatus includes a heat radiating seat located on an inner surface of the bottom of the control unit at a position apart from the electric motor and closer to the master cylinder than the electric motor and brought into thermal contact with the circuit board so as to radiate heat of the drive elements toward the housing.

A method and system for operating a brake system for motor vehicles, including a plurality of wheel brakes for which wheel-individual nominal pressure includes an electrically controllable pressure supply device, to provide a brake system pressure for actuating the wheel brakes. The brake system pressure provided by the pressure supply device can be determined. An electrically controllable inlet valve and electrically controllable outlet valve per wheel brake adjust wheel-individual brake pressures. At least one outlet valve is analogized for analog-controlled and is controlled by an electric control variable, wherein at least one valve-specific control characteristic and/or a valve-specific parameter is determined for the analogized or analog-controlled outlet valve by the brake system, and wherein the analogized or analog-controlled outlet valve is controlled as a function of the valve-specific control characteristic and/or the valve-specific parameter for the degradation of the brake pressure in the wheel brake associated with the outlet valve.

A motor vehicle braking system and method operable in a brake-by-wire mode and independently of the driver, with a master brake cylinder (2) operated by a brake pedal (1) having a piston (15, 16) and a pressure chamber (17, 18), connected with a brake circuit (I, II) and wheel brakes (8,9, 10, 11). An electrically controllable pressure supplying device (5) operates the wheel brakes; and a simulation device (3) with at least one elastic element (33), provides an acceptable brake pedal feel in the brake-by-wire mode. The simulation device (3) has a simulator chamber (29) connected, or is hydraulically connected, through a first hydraulic connection (54) to the pressure chamber (17) and which has an electrically actuated isolation valve (28) with a pressure means reservoir (4) under atmospheric pressure. A media separator device (47) is arranged in the connection (46) between the simulator chamber (29) and the isolation valve (28).

Disclosed herein are a safety brake device and method for safety braking using a hydraulic brake system including hydraulic wheel brakes of an autonomous vehicle, the autonomous vehicle further having an electrical power supply and signaling system for enabling an autonomous drive mode. The method comprises pressurizing a pressure storage canister containing brake fluid, monitoring electrical power supplies and signaling of the autonomous vehicle, and releasing brake fluid into the hydraulic brake system of the autonomous vehicle to activate the wheel brakes thereof upon determining loss of at least one of electrical power and signaling of the autonomous vehicle. Disclosed herein is also an autonomous vehicle comprising a safety brake.

A vehicle brake system includes a vehicle brake device and a hydraulic pressure generation unit. The vehicle brake device includes: a brake pedal that has a pedal portion, and a lever portion rotating about a rotation axis in response to the pedal portion being operated; a stroke sensor that outputs a signal based on a stroke amount of the brake pedal; a housing that rotatably supports the lever portion; and a reaction force generation portion that generates a reaction force applied on the lever portion based on the stroke amount. The hydraulic pressure generation unit generates a hydraulic pressure for braking a vehicle.