A motor control device includes a drive control device that controls turning on/off of a motor, and a voltage obtaining device that obtains a voltage across terminals of the motor. The drive control device determines whether or not the motor drive signal is OFF (ST01). If the determination is Yes, the drive control device determines whether or not the voltage across the terminals, which is obtained by the voltage obtaining device, has decreased and reached a target voltage (ST02). If the determination at ST02 is Yes, an ON time is set on the basis of the immediately preceding OFF time (ST03), and the motor drive signal is switched from OFF to ON (ST04). After the ON time elapses, the motor drive signal is switched from ON to OFF (ST05). Low-rotational-speed motor control can be performed while suppressing heat generation in a motor relay.

A motor control device includes a drive control device that controls turning on/off of a motor, and a voltage obtaining device that obtains a voltage across terminals of the motor. The drive control device determines whether or not the motor drive signal is OFF (ST01). If the determination is Yes, the drive control device determines whether or not the voltage across the terminals, which is obtained by the voltage obtaining device, has decreased and reached a target voltage (ST02). If the determination at ST02 is Yes, an ON time is set on the basis of the immediately preceding OFF time (ST03), and the motor drive signal is switched from OFF to ON (ST04). After the ON time elapses, the motor drive signal is switched from ON to OFF (ST05). Low-rotational-speed motor control can be performed while suppressing heat generation in a motor relay.

A method for controlling the braking power in an electrohydraulic braking system of a transportation vehicle which includes initiating a braking process; detecting a current state of the electrohydraulic braking system; increasing the braking pressure based on the current state of the electrohydraulic braking system, wherein braking pressure is built up more rapidly by targeted, staggered supply of braking pressure to individual parts of the braking system.

A vehicular control apparatus includes: a drive power control unit that controls drive power from a drive unit that drives drive wheels of a vehicle; a brake switch (a brake action detection unit) that detects a brake action performed on a brake unit, the brake action including decelerating and stopping the vehicle; a wheelspin detection unit that detects spinning of the drive wheels; a time measurement unit that, when the drive wheels being stopped start to rotate, measures time elapsed since the start of the rotation; and a control unit that enables the wheelspin detection unit to perform detection after a preset detection disabled period elapses since the time measurement unit has started measuring the time.

A vehicular control apparatus includes: a drive power control unit that controls drive power from a drive unit that drives drive wheels of a vehicle; a brake switch (a brake action detection unit) that detects a brake action performed on a brake unit, the brake action including decelerating and stopping the vehicle; a wheelspin detection unit that detects spinning of the drive wheels; a time measurement unit that, when the drive wheels being stopped start to rotate, measures time elapsed since the start of the rotation; and a control unit that enables the wheelspin detection unit to perform detection after a preset detection disabled period elapses since the time measurement unit has started measuring the time.

A method for updating a vehicle reference speed for a vehicle is disclosed. The method includes increasing brake pressure to at least one wheel of the plurality of wheels and determining, via an electronic control unit, that a first wheel speed of the at least one wheel is less than a second wheel speed of another wheel of the plurality of wheels. The method also includes estimating the vehicle reference speed of the vehicle based upon the first wheel speed of the at least one wheel.

A brake control device includes an electric pump, a pressure adjustment valve that adjusts a hydraulic pressure of a brake fluid discharged by the electric pump to an adjustment hydraulic pressure and supplies the brake fluid in a rear wheel cylinder, and a master unit provided with a servo chamber into which brake fluid at the adjustment hydraulic pressure is supplied and in which the adjustment hydraulic pressure is converted into a forward force of a master piston, and a master chamber fluidically separated from the servo chamber by the master piston and connected to the front wheel cylinder and in which a rearward force converted from the hydraulic pressure in the front wheel cylinder and is applied to the master piston. Also included is an input unit provided with an input chamber and a simulator, and a controller configured to control the electric pump and the pressure adjustment valve.

A hydraulic block of a slip control system of a hydraulic vehicle brake system includes receptacles for the hydraulic accumulator and receptacles for outlet valves arranged on opposite sides of each other in the hydraulic block. The sides of the hydraulic block, which comprise the receptacles for the outlet valves and the hydraulic accumulators, are connected to one another by bores perpendicular thereto.

A vehicle brake system and method for increasing the brake pressure in a first wheel brake cylinder and for limiting the brake pressure in a second wheel brake cylinder of a vehicle brake system. The method includes increasing a first brake pressure in the first wheel brake cylinder by controlling/holding a wheel inlet valve in its open state and controlling/holding a first wheel outlet valve in its closed state, and limiting an increase of a second brake pressure in the second wheel brake cylinder during the transfer of brake fluid into the first wheel brake cylinder by controlling/holding a second wheel inlet valve in its closed state and controlling a second wheel outlet valve into its open state. The second wheel outlet valve is controlled with a pulse width-modulated signal so that during the transfer of brake fluid, the second wheel outlet valve is permanently in its open state.

A brake fluid pressure control device for a vehicle that includes a wheel speed obtaining device to obtain wheel speed, and a vehicle body deceleration calculating means to calculate a vehicle body deceleration on the basis of the wheel speed. If a condition is satisfied in which the vehicle body deceleration continues to stay at a low rate of less than or equal to a predetermined threshold value for a predetermined period of time, the pressure increasing rate in pressure increasing control is altered to a higher value than before the condition is satisfied. The brake fluid pressure of a brake caliper can quickly be brought close to the fluid pressure of a master cylinder. Therefore, it is possible to improve the brake responsiveness when the brake is re-operated by the driver during the ABS control, thereby reducing the driver's feeling of wrongness and strangeness.