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AssigneeITT Automotive Europe GmbH
InventorsHans-Christof Klein, Peter Drott, Peter Lohberg, Juergen Balz
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A brake unit for automotive vehicles with electric drive is configured in the shape of a multiple-circuit compound system consisting of hydraulic friction brakes of brake circuits (I, I', I", III, III', III") and of an electroregenerative brake system (circuit II, II', II"). In a vehicle with a driven and a non-driven axle, three brake circuits exist, one brake circuit of which (I, I', I") is comprised of a pedal-actuated hydraulic brake pressure master unit (2) and of friction brakes (3, 4) acting upon the non-driven wheels. The second brake circuit (II, II', II") which represents an electroregenerative brake system is directly or indirectly coupled to the brake pedal and acts upon the driven wheels. The third brake circuit (III, III', III") which is comprised of friction brakes (10, 11) also acts upon the driven wheels. The actuation of the wheel brakes (10, 11) is connected to the second and third brake circuits. The distribution of the brake power to the front axle (VA) and to the rear axle (HA) is controlled with the aid of an electronic controller (7, 7',7").
A brake unit for automotive vehicles with electric drive, with a driven and a non-driven axle of vehicle wheels, with a first set of hydraulic friction brakes individually associated with said vehicle wheels of said driven axle, and with a second set of hydraulic friction brakes individually associated with said vehicle wheels of said non-driven axle, wherein said brake unit is provided in the shape of a multiple-circuit compound system consisting of said first set and said second set of said hydraulic friction brakes and an electroregenerative brake system, said electroregenerative brake system utilizing an electric driving motor of the automotive vehicle for braking and for energy recovery, and three brake circuits being provided, a first brake circuit which is comprised of a pedal-actuated brake pressure master unit and of said second set of hydraulic friction brakes, a second brake circuit which is constituted by the electroregenerative brake system which is directly or indirectly coupled to a brake pedal and which acts upon said driven wheels, and a third brake circuit which is comprised of said first set of hydraulic friction brakes and is coupled to the brake pedal, wherein an electronic controller which is fed with information on brake pressure caused by actuation of the brake pedal, on vehicle speed and on the charging condition of the vehicle batteries and evaluates said information for controlling said second brake circuit and said third brake circuit and for controlling the distribution of the brake power to said driven and said non-driven axles, characterized in that said first set of hydraulic friction brakes in a way isolated hydraulically from the brake pressure master unit, are connected to at least one of:
A brake system for automotive vehicles with electric drive, an accelerator pedal, a vehicle battery having a charging condition and a driven axle and a non-driven axle of vehicle wheels, said brake system comprising:
Dependencies are inferred from the claim text.