Abstract:
The invention relates to an electrohydraulic actuator comprising: an electric motor (1); a rotation-translation transmission (2) which is functionally connected downstream of said electric motor (1) and which comprises a threaded spindle (13) and a threaded nut (14); at least one first piston (3a, 3b) that delimits at least one first hydraulic pressure chamber (4a, 4b); and at least one second piston (5a, 5b) that delimits at least one second hydraulic pressure chamber (6a, 6b), the translational movement of said rotation-translation transmission (2) being transmitted to the pistons (3a, 3b, 5a, 5b), and the electric motor (1) being arranged coaxially to the threaded spindle (13) and threaded nut (14) and so as to radially encompass the pistons (3a, 3b, 5a,5b) which are arranged around said threaded spindle (13) with an even distribution.
Abstract:
The invention relates to an electric drive (2) comprising: a stationary outer stator (20) and an inner stator (96), and a rotor (50), which comprises a ferromagnetic rotor sleeve (56) to which permanent magnets (62) are attached on the side facing the outer stator (20); and a rotation-translation transmission (78), which comprises a spindle (80) co-rotating with the rotor (50), and a nut (86) that can be rotated relative to the spindle (80). The aim of the invention is to provide an electric drive of said type which has as little inertia moment as possible and is easy to manufacture. For this purpose, the inner stator comprises an anti-turn device for the nut (86).
Abstract:
The invention relates to a novel expansion device 10 for drum brakes, which is floatingly and approximately centrally arranged between two substantially symmetrical brake shoes 3,4, the expansion device 10 comprising at least two gear levers articulated to each other and each supported on a brake shoe 3,4, at least one of the gear levers of the expansion lock 10 being coupled to an actuating element 9 of an actuator system 7 such that the brake shoes 3,4 carry out an even, translationally directed expanding movement (B), which is converted by a gearing, in the direction of the brake drum 11. The aim of the invention is to devise an efficient, improved drum brake module which is easy to maintenance and inexpensive and yet can be variably adapted to many applications and characteristics of modern electric motor driven wheel brake actuators. For this purpose, at least one of the gear levers of the spreader lock has a spring element 17 integrated into it that can be elastically reversibly deformed by a brake application force about a defined elasticity ΔS of at least 1 mm in a defined manner.
Abstract:
The invention relates to a method for identifying a dangerous situation, wherein the dangerous situation exists for a vehicle (104) and/or emanates from the vehicle (104), wherein a plurality of measurement values are detected by means of different sensors of the vehicle (104), vehicle-to-X messages are detected by means of vehicle-to-X communication means of the vehicle (104), and data contents of the vehicle-to-X messages and the measurement values describe a situation of the surroundings of the vehicle (104) and/or a vehicle state. The method is characterized in that a defined dangerous situation is identified when the measurement values and/or the data contents of the dangerous situation meet associated criteria. The invention further relates to a corresponding system and a use of the system.
Abstract:
The invention relates to a steering brake actuation unit (1) for a hydraulic brake system (100) for a motor vehicle, said brake system (100) comprising: a left wheel brake (2) having a left brake circuit (4); a right wheel brake (3) having a right brake circuit (5); at least one master brake cylinder (6) for generating brake pressure in at least one of the brake circuits (4, 5); and at least one brake pedal (7) coupled to the master brake cylinder (6). The brake system (100) is designed in such a way that a brake pressure difference can be created in order to steer by braking. The aim of the invention is to design a brake system of this type which is more cost-effective, more compact and easier to operate. To achieve this aim, according to the invention, the steering brake actuation unit (1) has a single master brake cylinder (6) for generating brake pressure for both brake circuits (4, 5), and a changeover valve unit (8) is associated with the master brake cylinder (6), said unit being configured to admit the brake pressure from the master brake cylinder (6) simultaneously into both brake circuits (4, 5) or to cut off one of the brake circuits (4, 5) from the brake pressure.
Abstract:
The invention relates to an electronic device (14) comprising: an electronic circuit (26) accommodated in a circuit housing (38) having a first thermal expansion coefficient, and a moulded body (40) which surrounds the circuit housing (38), said body having a second thermal expansion coefficient that differs from the first thermal expansion coefficient. The moulded body (40) is fixed to the circuit housing (38) at least at two different mutually spaced (48) fixing points (46) on the circuit housing (38).
Abstract:
The invention relates to a circuit board (4) for connecting a deformation sensor (16, 18), which is provided on a radial outer side of a rolling bearing outer ring (6), to a signal-processing circuit (28), said circuit board comprising - a cylindrical support plate (20) having a cylinder opening in which said rolling bearing outer ring (6) can be accommodated concentrically to said cylindrical support plate (20), - an electrical contact pad (22) on the cylindrical support plate (20) for electrical contacting with the deformation sensor (16, 18) and - an electrical strip conductor (26) which is electrically connected to said electrical contact pad (22) and is designed to receive signals from the deformation sensor (16, 18) and convey them to the signal-processing circuit (28).
Abstract:
The invention relates to a method for providing haptic information to the driver of a motor vehicle, equipped with a brake-by-wire brake system, about the operating state of the brake system, in which method the brake pedal characteristic is generated by a pedal travel simulator, in the form of a functional relationship between the brake pedal opposing force and the brake pedal travel, and is modified as a function of an operating state. In order to provide the driver with the haptic information channel via which electronically controlled information can be communicated to the driver during braking, without the impression of a defect arising, the invention proposes that a basic brake pedal characteristic is generated by means of a passive simulator spring which assigns pedal travel, on which pedal return travel transporting the haptic information is superimposed, to a given pedal force in an unchanging, constant relationship.
Abstract:
The invention relates to a method for operating an assistance system of a vehicle, wherein the speed recommendation for a currently travelled-on route section is determined as a function of one or more information items, and in which the determined speed recommendation is output to a vehicle driver of the vehicle and/or said method adjusts the speed of the vehicle autonomously to the determined speed recommendation.
Abstract:
The invention relates to a pump unit (1) driven by an electric motor for providing vacuum for a pneumatic brake booster (2) of a motor vehicle brake system, wherein the pump unit (1) has a pump housing (3) and at least one elastic displacement element (5) for displacing a working medium, wherein the pump housing (3) is closed off by at least one working chamber cover (4) such that a working chamber (6) is delimited between the displacement element (5) and the working chamber cover (4), wherein at least one inlet valve (7) with an inlet channel (8) and at least one outlet valve (9) with an outlet channel (10) are associated with the working chamber (6), and wherein the valves (7, 9) can each be shifted automatically by means of pressure difference from a closed non-actuated starting position into an open actuating position. In order to offer a cost-effective and particularly compact pump unit, which has a reduced weight and is improved in terms of ease of production and assembly, according to the invention the inlet valve (7) and the outlet valve (9) are formed by a one-piece elastic element (11).