Patent ID: 9199618
Filing Date: 2015-12-01
Classification: B60T

Abstract:
1. An electrohydraulic brake system comprising: an electric motor operating as a generator; an actuation unit controlled by a brake pedal and configured as a combination of a hydraulic brake master cylinder and a first electrohydraulic actuator having an electrically actuated piston that linearly translates within a cylinder, the electrohydraulic actuator forming a brake booster connected upstream of the hydraulic brake master cylinder, the brake booster generating a pressure constituting a boosting force and additively superimposing the boosting force on an actuating force induced via the brake pedal; hydraulic brake lines connecting the actuation unit to friction brakes of the vehicle, the friction brakes being configured to produce a friction brake component; an electronic control unit for distributing a braking effect between a recuperation brake component produced by the generator and the friction brake component, the electronic control unit being configured to electrically actuate the brake booster; and a second electrohydraulic actuator being a linear actuator in the form of a cylinder-piston arrangement having a linearly translating piston, connected to the actuation unit, configured to take up a pressure medium volume from the hydraulic brake master cylinder, which corresponds to the recuperation brake component for producing a characteristic brake pedal feel resembling friction braking with a predetermined boosting force, wherein the second electrohydraulic actuator provides fluid uptake from the master cylinder.