Patent ID: 11872971
Assignee: HYUNDAI MOBIS CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. A braking system comprising:
a main master cylinder including a first main chamber, a second main chamber and a main piston;
a backup master cylinder including a backup piston, a reservoir, a plurality of wheel brakes including front and rear wheel brakes, a valve and a motor; and
an electro-hydraulic brake device configured to perform an electronic brake-force distribution (EBD) control function comprising:
determining whether emergency braking is required for a vehicle; and
controlling an inlet valve connected to a rear wheel brake so that, when pressures of the plurality of wheel brakes are increased, the inlet valve is closed for a closed time period and is then opened to increase a pressure at a front wheel brake sooner than a pressure of a rear wheel brake
wherein the closed time period is between a first time when the inlet valve is closed and a second time when V1+f(P)≤V2−Vsub is satisfied, wherein V1 denotes a first amount of fluid recovered to a reservoir using a first backup valve, f(P) denotes an amount of inflow fluid introduced into a line in a hydraulic circuit so that the line supplies a pressure of the second main chamber to the rear wheel brake, V2 denotes a second amount of fluid introduced into the second main chamber, and Vsub denotes a third amount of fluid discharged from a backup master cylinder.