BRAKE SYSTEM FOR AUTOMOBILE

摘要

A brake system including a main body having a first main chamber and a second main chamber divided by a main piston, a motor configured to move the main piston forward and move the main piston rearward, a first traction control valve installed in a first flow path, a second traction control valve installed in a second flow path, and a controller configured to control the motor, the first traction control valve, and the second traction control valve. When an anti-lock brake system (ABS) starting pressure is lower than an ABS critical value, the controller performs a low-pressure forward movement connection control that closes the first traction control valve and the second traction control valve, and moves the main piston forward to increase a first hydraulic pressure in the second main chamber.

主权项

1. A brake system for an automobile, comprising:
a main body having an internal space divided by a main piston into a first main chamber and a second main chamber having a greater effective cross section than the first main chamber; a motor configured to:
move the main piston forward such that the first main chamber is widened while the second main chamber is narrowed, andmove the main piston rearward such that the first main chamber is narrowed while the second main chamber is widened; a first traction control valve installed in a first flow path through which a first hydraulic pressure in the second main chamber is supplied to wheel brakes; a second traction control valve installed in a second flow path through which a second hydraulic pressure in the first main chamber is supplied to the wheel brakes; and a controller configured to control the motor, the first traction control valve, and the second traction control valve, is wherein when an anti-lock brake system (ABS) starting pressure is lower than an ABS critical value, the controller performs a low-pressure forward movement connection control that closes the first traction control valve and the second traction control valve, and moves the main piston forward to increase the first hydraulic pressure in the second main chamber, and wherein the ABS starting pressure is a pressure of the wheel brakes when an ABS is started.