Patent ID: 9637103
Date: 2017-05-02
CPC Classifications: B60T,F16D

Claim:
1. A method of controlling a braking system using a brake device having an electromechanical parking function, the method comprising: a step of starting parking braking by adjusting a hydraulic pressure of a complex caliper unit provided to any one of a front wheel and a rear wheel and a hydraulic caliper unit provided to the other one of the front wheel and the rear wheel so as to perform a braking function by operating at least one of a hydraulic circuit system and an electromechanical element; a step of generating a braking force in the brake pad by press contacting by a primary piston disposed at the complex caliper unit to operate a secondary piston disposed at the complex caliper unit so as to be operated by the hydraulic circuit system to press a brake pad by the electromechanical element, and completing the parking braking by limiting an operation location of the electromechanical element; a parking release and preliminary braking step of releasing a limitation of an operation location of the electromechanical element, pressing the secondary piston by the primary piston by operating the electromechanical element, and generating a braking force in the front wheel and the rear wheel by operating a hydraulic pump connected to the hydraulic circuit system; a primary piston backward moving step of allowing oil inflow of an accumulator for the complex caliper unit and separating the primary piston from the secondary piston by moving the primary piston; and a primary piston forward pressing step of blocking oil inflow of an accumulator for the complex caliper unit and pressing the secondary piston by moving the primary piston by the electromechanical element, wherein the parking release and preliminary braking step further comprises operating the hydraulic pump to a target pressure level that can hold a vehicle by a braking force applied to the rear wheel side, when generating the braking force in the front wheel and the rear wheel by operating the hydraulic pump.