Patent ID: 9738263
Date: 2017-08-22
CPC Classifications: B60T

Claim:
1. An electro-hydraulic brake system comprising: a brake input device manipulated by a driver to brake a vehicle; a brake input detecting sensor configured to detect a brake input value of the driver through the brake input device; a pressure generating device configured to generate a brake hydraulic pressure; a wheel cylinder configured to receive the brake hydraulic pressure generated from the pressure generating device and to generate braking power for braking rotations of each vehicle wheel; a hydraulic pressure supply line connected between the pressure generating device and the wheel cylinder to transfer the brake hydraulic pressure generated from the pressure generating device to each wheel cylinder; and a controller configured to output a control signal for controlling an operation of the pressure generating device in order to allow the pressure generating device to generate a target brake hydraulic pressure based on a signal of the brake input detecting sensor, wherein the pressure generating device includes a main pump and a supplementary pump, each of which generates a brake hydraulic pressure according to the control signal of the controller and is connected to the hydraulic pressure supply line to transfer the generated brake hydraulic pressure through the hydraulic pressure supply line, wherein the controller is configured to determine a driver request deceleration based on the brake input value of the driver detected by the brake input device, and to select one from the main and supplementary pumps according to the determined driver request deceleration to operate the selected pump or all the main and supplementary pumps, such that the brake hydraulic pressure is generated, wherein the controller is configured to operate all the main and supplementary pumps when the determined driver request deceleration is greater than a first set value, and wherein one selected from the main and supplementary pumps when the determined driver request deceleration is equal to or less than the first set value to generate the brake hydraulic pressure.