A method for adjusting brake pressures at pneumatically actuated wheel brakes of a vehicle includes receiving an external braking demand. The method further includes, in response to the received external braking demand, performing, during each of a plurality of computation cycles: (i) ascertaining control signals for pressure control valves of the pneumatically actuated wheel brakes of the vehicle, (ii) continuously ascertaining a differential slip value, wherein the differential slip value is a difference between a slip of two axles of the vehicle and is determined by measuring signals supplied by speed sensors of wheels of the vehicle, (iii) evaluating the differential slip value with respect to a predefined or adjustable setpoint differential slip value, (iv) based on the evaluation of the differential slip value, adapting the ascertained control signals, and (v) releasing the adapted control signals to the pressure control valves.

A method is provided for decelerating a vehicle. The vehicle has an electro-pneumatic brake system, at least one front axle, at least one rear axle, and a brake value transmitter. The vehicle further includes at least one axle modulator for the front axle of the vehicle, for performing control of at least one front axle brake pressure at the at least one front axle, and/or at least one axle modulator for the rear axle of the vehicle, for performing control of a rear axle brake pressure at the at least one rear axle of the vehicle. The method includes generating a redundancy signal at a first axle, the front axle or rear axle, or at a trailer control valve, and performing open-loop and/or closed-loop control of an auxiliary brake pressure at another axle, the front axle or the rear axle, via the redundancy signal.

A method is provided for decelerating a vehicle. The vehicle has an electro-pneumatic brake system, at least one front axle, at least one rear axle, and a brake value transmitter. The vehicle further includes at least one axle modulator for the front axle of the vehicle, for performing control of at least one front axle brake pressure at the at least one front axle, and/or at least one axle modulator for the rear axle of the vehicle, for performing control of a rear axle brake pressure at the at least one rear axle of the vehicle. The method includes generating a redundancy signal at a first axle, the front axle or rear axle, or at a trailer control valve, and performing open-loop and/or closed-loop control of an auxiliary brake pressure at another axle, the front axle or the rear axle, via the redundancy signal.

An object of the present invention is to provide a control apparatus for an electric vehicle capable of preventing the vehicle from being destabilized because a rear wheel is locked first or drivability from reducing because a front wheel is locked early. A control apparatus includes a regenerative braking force calculation portion configured to calculate a regenerative braking force to be generated on each of a front motor and a rear motor based on a request braking force requested to an electric vehicle, a power limit portion configured to reduce the regenerative braking force based on a power limit on a power source, and a frictional braking force output portion configured to output an instruction for generating a frictional braking force according to a regenerative braking force reduction amount, which is an amount of a reduction in the regenerative braking force by the power limit portion, to a brake apparatus.

An object of the present invention is to provide a control apparatus for an electric vehicle capable of preventing the vehicle from being destabilized because a rear wheel is locked first or drivability from reducing because a front wheel is locked early. A control apparatus includes a regenerative braking force calculation portion configured to calculate a regenerative braking force to be generated on each of a front motor and a rear motor based on a request braking force requested to an electric vehicle, a power limit portion configured to reduce the regenerative braking force based on a power limit on a power source, and a frictional braking force output portion configured to output an instruction for generating a frictional braking force according to a regenerative braking force reduction amount, which is an amount of a reduction in the regenerative braking force by the power limit portion, to a brake apparatus.

A brake actuator system may comprise a brake actuator comprising a ball screw, a ball nut coupled to the ball screw, and a ram coupled to a ram end of the ball nut; a position sensor coupled to the brake actuator; a processor in electronic communication with the brake actuator and the position sensor; and a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations. The operations may comprise commanding the brake actuator to translate the ball nut in a first direction toward a brake stack; detecting the pusher reaching a furthest forward position; and commanding the brake actuator to translate the ball nut in a second direction opposite the first direction for a predetermined retraction distance.

A drive control apparatus is applied to a drive system that is mounted to a vehicle, drives wheels of the vehicle by a motor, and brakes the wheels by a brake apparatus. The drive control apparatus determines a road-surface state of a travel road of the vehicle. The drive control apparatus suppresses slipping of the vehicle by correcting a drive torque by correcting at least either of a motor torque and a brake torque. When determined that the drive torque is to be corrected, the drive control apparatus adjusts a correction amount of the drive torque by adjusting the motor torque with higher priority than the brake torque in response to be determined that the road-surface state is rough.

In a hydraulic brake system, when a main power supply is in an abnormal condition in which it cannot supply electric power to a pump motor, etc., the pump motor is operated with electric power supplied from an auxiliary power supply, irrespective of the presence of a braking request. Thus, when the main power supply is in the abnormal condition, the number of times inrush current flows is reduced. As a result, the voltage of the auxiliary power supply is less likely to be lower than an operation minimum voltage, and the hydraulic brake system is less likely to be unable to be operated.

In a hydraulic brake system, when a main power supply is in an abnormal condition in which it cannot supply electric power to a pump motor, etc., the pump motor is operated with electric power supplied from an auxiliary power supply, irrespective of the presence of a braking request. Thus, when the main power supply is in the abnormal condition, the number of times inrush current flows is reduced. As a result, the voltage of the auxiliary power supply is less likely to be lower than an operation minimum voltage, and the hydraulic brake system is less likely to be unable to be operated.

A system and method for controlling a vehicle wheel brake are provided. The system includes one or more inertial sensors disposed within a handle coupled to, and configured for movement relative to, a fixed reference frame in the vehicle between a neutral position and one or more input positions. Each sensor generates an inertial measurement signal indicative of a value of an inertial measurement associated with movement of the handle and sensor between the neutral and input positions. A controller receives the signals, identifies a turning point in a rate of change of the value of one of the inertial measurement indicated by the signals, and generates an operator command signal when the value meets a predetermined condition. The operator command signal is configured to cause one of application or release of the wheel brake.