Patent ID: 6871917
Filing Date: 2005-03-29
Classification: B60T

Abstract:
1. Device for controlling electromagnetically operable valves of an electrohydraulic brake system for motor vehicles, comprising: a device for detecting a driver's request for deceleration, at least one of an emergency pressure generator or master brake cylinder operable by means of a brake pedal, wherein said master cylinder includes at least one pressure chamber, and a non-pressurized pressure fluid supply reservoir, a hydraulic auxiliary pressure source whose pressure can be applied to wheel brakes that are connectable to the master brake cylinder by way of hydraulic connections closable by means of electromagnetically operable separating valves, and associated with said separating valves are electromagnetically operable pressure control valves that connect the wheel brakes to the pressure source in a pressure increase phase, and which are closed in a pressure maintaining phase and connect the wheel brakes to the pressure fluid supply reservoir in a pressure reduction phase, electromagnetically operable pressure-compensating valves that permit a pressure compensation between the wheel brakes of a vehicle axle, an electronic control and regulation unit for actuating the auxiliary pressure source, the separating valves, a control and regulation unit which includes first and second valve drivers associated with which is a first and a second group of valves, wherein said driver stages are used to disable the first or the second group, respectively, when a malfunction occurs,