| 摘要 |
A control circuit of an electronic-control brake system for vehicles and a coil cooling method for a solenoid are provided to maintain operations of ABS(Anti-lock Brake System)/TCS(Traction Control System)/ESP(Electronic Stability Program)/EBD(Electronic Brake force Distribution) longer by considerably increasing the continuous operation time limit of the solenoid valve. A control circuit of an electronic-control brake system for vehicles includes a hydraulic control unit(HCU) that comprises an inlet solenoid valve(41) mounted to a brake line for supply of oil to a wheel cylinder(20), an outlet solenoid valve(42) mounted to a return line(31) for return supply of the oil to a master cylinder(10), a hydraulic pump(44) mounted to the return line, and a low-pressure accumulator(47) mounted to a return path near the entry of the hydraulic pump to compress the oil being returned to the hydraulic pump. A coil cooling method for a solenoid comprises steps of monitoring operation time of the inlet solenoid valve or the outlet solenoid valve, estimating temperature of a coil of the solenoid valve, opening a detour solenoid valve(51) that controls the coil according to the coil temperature, and circulating oil in the HCU with oil in the master cylinder.
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