Hydraulic unit of electronic control brake system

A hydraulic unit of an electronic control brake system comprising a modulator block on which components comprising a plurality of normal open/normal closed (NO/NC) valves for adjusting brake hydraulic pressure supplied to wheels of a vehicle, a driving force control valve, a shuttle valve, a low-pressure/high-pressure accumulator, pumps and a motor are mounted and in which flow paths for connecting the components are formed, the hydraulic unit comprising:

• a pair of master cylinder connection portions arranged on an upper side of a front side of the modulator block in a lateral direction;
• a first valve row having a plurality of first valve accommodation bores that are arranged in a rear side of the modulator block in the lateral direction and accommodate the plurality of NO valves;
• a second valve row having a plurality of second valve accommodation bores that are arranged in the rear side of the modulator block in the lateral direction and accommodate the plurality of NC valves;
• a pair of low-pressure accumulator bores arranged in a bottom side of the modulator block in the lateral direction;
• pump accommodation bores arranged between the first valve row and the second valve row, formed in the lateral direction with respect to a direction in which valve accommodation bores are formed, and formed in both sides of the modulator block;
• motor accommodation bores that are formed between two pump accommodation bores to be perpendicular to the pump accommodation bores and have the motor for driving the pumps inserted into the pump accommodation bores formed in the motor accommodation bores;
• a pair of shuttle valve (ESV) accommodation bores arranged between the first valve row and the second valve row and connected to a suction side of each of the pump accommodation bores and the master cylinder connection portions;
• a pair of driving force control valve (TC) accommodation bores arranged between wheel cylinder connection portions formed in the modulator block and the first valve row;
• and
• a pair of high-pressure accumulator bores arranged in the modulator block in a longitudinal direction,
• wherein the pair of high-pressure accumulator bores are formed to have an arrangement parallel to the motor accommodation bores.