| 摘要 |
A vehicle brake system includes a brake pedal which pressurizes and releases pressure according to the brake direction of a vehicle; a pedal simulation which generates a reaction force according to the pressurization of a brake; a cut valve which regulates supply amount of brake fluid between reservoir tank and pedal simulator; a pressure valve which regulates amount of the brake fluid supplied to a booster by opening the valve when brake pedal is pressed; a pressure reduction valve which regulates amount of the brake fluid supplied to a reservoir tank by opening the valve when brake pedal is released; a control unit which controls actuating current of cut valve, pressure valve, and pressure reduction valve according to actuated time of respective valves. By way of controlling actuating current of valves provided in electronically controlled hydraulic brake or active hydraulic brake which is used for a hybrid vehicle or a electric vehicle, the brake system provided in this disclosure prevents deterioration and overheating caused by operation of hydraulic control valve of an active hydraulic boost (AHB) for many hours due to driving conditions and caused by continuous operation of hydraulic control valves which occurs out of malfunction detection range such as deviation of a brake pedal as a part or offset of a pedal. [Reference numerals] (100) Select a control valve according to the control mode; (200) Control electric current applying to the cut valve; (300) Control electric current applying to a pressure valve; (400) Control electric current applying to a pressure reduction valve; (AA) Start |
