Patent ID: 6315370
Filing Date: 2001-11-13
Classification: B60T

Abstract:
An electronically controllable brake actuation system for automotive vehicles with a plurality of wheels, which system includes a pedal-actuated master brake cylinder, a simulator interacting with the master brake cylinder, a plurality of wheel brakes connectable to the master brake cylinder by at least one hydraulic connection that is closable by a separating valve, a pressure source that is actuatable by an electronic control unit and by which the wheel brakes are pressurizable, a device for the identification of characteristics of a pedal actuation, wherein the pressure source is configured as at least one continuously adjustable piston-and-cylinder assembly having at least one pressure chamber to which preselected ones of the wheel brakes are connected by an intermediary of inlet valves, wherein the at least one piston-and-cylinder assembly is provided by at least one hydraulic cylinder having a piston which is operable by a reversible direct-current motor, wherein the pressure chamber of the at least one piston-and-cylinder assembly is connected to a low-pressure accumulator by way of a non-return valve which opens towards the pressure chamber, the preselected wheel brakes being connectable to the accumulator by way of an outlet valve, wherein the inlet valve is configured as an electromagnetically operable, normally open control valve, and the outlet valve is configured as an electromagnetically operable, nonnally closed control valve,wherein the pressure source is configured as a first and a second continuously adjustable one-circuit piston-and-cylinder assembly, each having a pressure chamber to which wheel brakes, each associated with a first or a second vehicle axle, are connected, wherein a normally closed valve is inserted into the connection between the wheel brakes associated with the first vehicle axle and the first piston-and-cylinder assembly, whereas the connection between the wheel brakes associated with the other vehicle axle is without an intermediary of switching valves.