| CPC B60T 13/686 (2013.01) [B60T 8/4081 (2013.01); B60T 7/042 (2013.01)] | 9 Claims |
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7. A system for controlling a brake of a vehicle, the system comprising:
a reservoir storing working fluid;
a master cylinder connected to the reservoir and including a piston configured to linearly move between two mutually opposed ends of the master cylinder;
a wheel brake provided with a hydraulic pressure from the master cylinder;
a residual pressure control hydraulic line connected to the reservoir and the wheel brake;
a control valve disposed at the residual pressure control hydraulic line;
an input unit receiving a braking pressure required for the wheel brake; and
a controller configured to control a degree of opening of the control valve, wherein the controller is configured to:
determine a pressure difference between (1) a channel pressure determined by a hydraulic pressure of the wheel brake, and (2) the braking pressure required for the wheel brake;
determining whether the piston at least partially contacts one of the two mutually opposed ends of the master cylinder;
open the control valve in response to determining that (1) the channel pressure is larger than the required braking pressure and (2) the piston at least partially contacts one of the two mutually opposed ends of the master cylinder; and
control the control valve based on the difference between the required braking pressure and the channel pressure after opening the control valve,
wherein the controller is further configured to:
increase the degree of opening of the control valve in response to a pressure obtained by subtracting the required braking pressure from the channel pressure being larger than a first predetermined value; and
decrease the degree of opening of the control valve in response to a pressure obtained by subtracting the channel pressure from the required braking pressure being larger than a second predetermined value.
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