Patent ID: 6203116
Filing Date: 2001-03-20
Classification: B60T

Abstract:
A method for operating an electromechanical brake system of a motor vehicle that contains the following components:brake actuators, one assigned to each wheel of the motor vehicle,a control unit for controlling or regulating the brake system, and a first and second brake circuit that operate independently of one another and are supplied with power by an on-board network of the motor vehicle in the normal mode, said method comprising:monitoring the voltage of an on-board network in a control unit, wherein the electromechanical brake system operates in a normal mode if the voltage of the on-board network exceeds a predetermined value, and wherein the brake system operates in the emergency mode if the voltage of the on-board network voltage falls below a predetermined value, operating both brake circuits if the brake system is actuated in the normal mode, with the proviso that if the brake system is actuated in the emergency mode, only the first one of the two brake circuits can be actuated until an emergency power storage mechanism assigned to the first brake circuit is depleted,wherein only the second brake circuit is operated until the emergency power storage mechanism assigned to the second brake circuit has reached a residual power value that is sufficient for locking the wheels the second brake circuit at least once while the motor vehicle is at a standstill.