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AssigneeContinental Teves AG & Co. oHG
InventorsHans-Jörg Feigel, Peter Drott, Kristijan Tarandek, Johann Jungbecker
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The invention relates to an electrically controllable pressure provision device (5, 5′), particularly for a hydraulic motor-vehicle brake system, comprising a stepped bore (54), which is arranged in a housing (53,21), and a piston (51), which can be actuated by an electromechanical actuator (35, 36). The piston (51), together with the housing (53, 21), delimits a pressure chamber (50). The piston (51) is constructed as a stepped piston, the smaller-diameter piston step (51′) of which enters the smaller-diameter step (54′) of the stepped bore after a specified actuation of the stepped piston, such that the pressure chamber (50) is subdivided into a first pressure chamber (55) and a second pressure chamber (56). The invention further relates to a brake system for motor vehicles having such a pressure provision device.
An electrically controllable pressure provision device, for a hydraulic motor vehicle brake system, comprising a housing forming a stepped bore and a piston which can be actuated by an electromechanical actuator, the piston delimiting a pressure space with the housing, wherein the piston is configured as a stepped piston having a piston step of smaller diameter that dips into a step of smaller diameter of the stepped bore after a predefined actuation displacement of the stepped piston, with the result that the pressure space is divided into a first pressure chamber and a second pressure chamber.
A brake system for motor vehicles having a brake master cylinder which can be actuated by means of a brake pedal and at least one pressure space of the brake master cylinder is connected to wheel brakes in a manner which can be disconnected, a pressure control valve arrangement for regulating or controlling a wheel brake pressure which is triggered at a wheel brake, an electrically controllable pressure provision device which can be connected to the wheel brakes, and an electronic control and regulating unit for actuating the pressure provision device or the pressure control valve arrangement, the pressure provision device comprising a housing forming a stepped bore and a piston which can be actuated by an electromechanical actuator, the piston delimiting a pressure space with the housing, wherein the piston is configured as a stepped piston, a piston step of smaller diameter of which dips into a step of smaller diameter of the stepped bore after a predefined actuation displacement of the stepped piston, with the result that the pressure space is divided into a first pressure chamber and a second pressure chamber.
Dependencies are inferred from the claim text.