초록 ▼

A wheel brake pressure supplying device for supplying fluid pressure for a wheel brake cylinder of a wheel on an automotive vehicle includes a reservoir, a pump, a motor, an accumulator connected to the wheel brake cylinder, a fluid pressure sensor, an electric source, an operation time determining

A wheel brake pressure supplying device for supplying fluid pressure for a wheel brake cylinder of a wheel on an automotive vehicle includes a reservoir, a pump, a motor, an accumulator connected to the wheel brake cylinder, a fluid pressure sensor, an electric source, an operation time determining device and a motor control device. The reservoir stores a fluid and the pump is connected to the reservoir for pumping fluid in the reservoir. The motor operates the pump and the accumulator is connected to the pump for storing the fluid pumped by the pump so that fluid pressure in the accumulator increases through operation of the pump. The fluid pressure sensor senses when the fluid pressure in the accumulator is less than a predetermined pressure. The electric source is connected to the motor for supplying voltage to the motor and the operation time determining device determines a target operation time of the motor based on the voltage of the electric source. The motor control device starts the operation of the motor when the fluid pressure in the accumulator is less than the predetermined pressure and terminates the operation of the motor when the operation time of the motor reaches the target operation time.

대표청구항 ▼

[ What is claimed is:] [1.] A hydraulic braking pressure control device for an automotive vehicle having a wheel, comprising:a wheel brake cylinder operatively connected to the wheel for applying a braking force to the wheel;hydraulic pressure generating means for generating hydraulic pressure in re

[ What is claimed is:] [1.] A hydraulic braking pressure control device for an automotive vehicle having a wheel, comprising:a wheel brake cylinder operatively connected to the wheel for applying a braking force to the wheel;hydraulic pressure generating means for generating hydraulic pressure in response to depression of a brake pedal and supplying the hydraulic pressure to the wheel brake cylinder;a reservoir for storing brake fluid;a pump connected to the reservoir for pumping the brake fluid in the reservoir;a motor connected to the pump for operating the pump;an accumulator connected to the pump for storing brake fluid pumped by the pump so that hydraulic braking pressure in the accumulator increases through operation of the pump;a change over valve connected to the hydraulic pressure generating means, the wheel brake cylinder and the accumulator, the change over valve being positionable in a first position in which the wheel brake cylinder communicates with the hydraulic pressure generating means, and a second position in which the wheel brake cylinder is prevented from communicating with the hydraulic pressure generating means and communicates with the accumulator;hydraulic braking pressure sensing means for sensing when the hydraulic braking pressure in the accumulator is less than a predetermined pressure;an electric source electrically connected to the motor for supplying voltage to the motor;operation time determining means for determining a target operation time of the motor based on the voltage of the electric source; andmotor control means for starting operation of the motor when the hydraulic braking pressure in the accumulator is less than the predetermined pressure and for terminating the operation of the motor when an operation time of the motor reaches the target operation time determined by the operation time determining means.