Patent ID: 8087732

Claim:
A method for detecting a circuit failure in a brake system of a vehicle, the brake system including first and second brake circuits, a dual-circuit brake actuator, and first and second control lines, the first brake circuit including a first valve for regulating brake pressure in the first brake circuit and a first pressure sensor for measuring pressure in the first brake circuit, the second brake circuit including a second valve for regulating brake pressure in the second brake circuit and a second pressure sensor for measuring pressure in the second brake circuit, the brake actuator being connected via the first control line to the first valve to control the first valve, and via the second control line to the second valve to control the second valve, the method comprising the steps of: (i) during actuation of said brake actuator, (a) determining a first pressure difference in said first brake circuit and (b) determining a second pressure difference in said second brake circuit, and (ii) determining a first comparison value from said first and second pressure differences.