Abstract: A motor vehicle chassis is provided having a base structure that can be hydraulically adjusted in level between a raised and a lowered position. A hydraulic adjuster is assigned to one of the two foot points of the corresponding suspension spring in each of the four wheel suspensions. At least two of the adjusters can be pressurized in parallel by a common hydraulic aggregate comprising a tank and a motor-pump unit and activated by a control unit. The at least two hydraulic adjusters that can be pressurized by the common hydraulic aggregate communicate hydraulically with the accumulator chamber of a spring-piston accumulator, which has at least one piston-position transmitter linked by signal transmission to the control unit.

Abstract: A motor vehicle chassis is provided having a base structure that can be hydraulically adjusted in level between a raised and a lowered position. A hydraulic adjuster is assigned to one of the two foot points of the corresponding suspension spring in each of the four wheel suspensions. At least two of the adjusters can be pressurized in parallel by a common hydraulic aggregate comprising a tank and a motor-pump unit and activated by a control unit. The at least two hydraulic adjusters that can be pressurized by the common hydraulic aggregate communicate hydraulically with the accumulator chamber of a spring-piston accumulator, which has at least one piston-position transmitter linked by signal transmission to the control unit.

Abstract: In a motor vehicle chassis, at least one wheel suspension, which comprises a spring in the form of a coil spring, has associated therewith a hydraulic height adjustment device having a cylinder-piston arrangement which acts on a base point of the coil spring. The cylinder-piston arrangement can be supplied by a decentral hydraulic aggregate which is associated with the relevant wheel and comprises a storage container for hydraulic fluid and a hydraulic pump driven by an electric motor. At least the electric motor of the hydraulic aggregate is situated within the coil spring.

Abstract: A hydraulic level-adjustment device has a reservoir, a reversible hydraulic unit with a hydraulic pump, and a single-acting hydraulic linear actuator. To lift a vehicle chassis, the working space of the linear actuator can be pressurized by the hydraulic pump operated in its first pumping direction via its first pump connection and a fill line with a fill-check valve arranged therein. To lower the chassis, via its second pump connection, the hydraulic pump, operated in the reverse pumping direction, pumps hydraulic fluid into the reservoir via an outflow line with a throttle unit arranged therein. The pressure present upstream of the throttle unit acts on the control connection of a lockable, drainage-check valve via a control line and opens same, so that, under the weight of the motor vehicle, hydraulic fluid is forced out of the working space of the hydraulic linear actuator into the reservoir via the drainage line.

Abstract: In a motor vehicle chassis, all four wheel suspensions each have associated therewith a hydraulic height adjustment device having a cylinder-piston arrangement which acts on a base point of the relevant spring and is supplied by a decentral hydraulic aggregate. The hydraulic height adjustment devices each comprise a complex, integrated electrohydraulic adjustment assembly comprising the allocated hydraulic aggregate and the associated cylinder-piston arrangement and having a specific adapter into which the allocated cylinder-piston arrangement is integrated in such a way that there are no exposed hydraulic lines between the allocated hydraulic pump and the associated cylinder-piston arrangement. The front wheel height adjustment devices and the rear wheel height adjustment devices differ in terms of the adapter.

Abstract: In a motor vehicle chassis, at least one wheel suspension, which comprises a spring in the form of a coil spring, has associated therewith a hydraulic height adjustment device having a cylinder-piston arrangement which acts on a base point of the coil spring. The cylinder-piston arrangement can be supplied by a decentral hydraulic aggregate which is associated with the relevant wheel and comprises a storage container for hydraulic fluid and a hydraulic pump driven by an electric motor. At least the electric motor of the hydraulic aggregate is situated within the coil spring.

Abstract: In a motor vehicle chassis, all four wheel suspensions each have associated therewith a hydraulic height adjustment device having a cylinder-piston arrangement which acts on a base point of the relevant spring and is supplied by a decentral hydraulic aggregate. The hydraulic height adjustment devices each comprise a complex, integrated electrohydraulic adjustment assembly comprising the allocated hydraulic aggregate and the associated cylinder-piston arrangement and having a specific adapter into which the allocated cylinder-piston arrangement is integrated in such a way that there are no exposed hydraulic lines between the allocated hydraulic pump and the associated cylinder-piston arrangement. The front wheel height adjustment devices and the rear wheel height adjustment devices differ in terms of the adapter.

Abstract: A hydraulic level-adjustment device has a reservoir, a reversible hydraulic unit with a hydraulic pump, and a single-acting hydraulic linear actuator. To lift a vehicle chassis, the working space of the linear actuator can be pressurized by the hydraulic pump operated in its first pumping direction via its first pump connection and a fill line with a fill-check valve arranged therein. To lower the chassis, via its second pump connection, the hydraulic pump, operated in the reverse pumping direction, pumps hydraulic fluid into the reservoir via an outflow line with a throttle unit arranged therein. The pressure present upstream of the throttle unit acts on the control connection of a lockable, drainage-check valve via a control line and opens same, so that, under the weight of the motor vehicle, hydraulic fluid is forced out of the working space of the hydraulic linear actuator into the reservoir via the drainage line.

Abstract: A hydraulic system, especially in a high-pressure application, comprises a pressurized-fluid tank, a pressurized-fluid pump driven by a drive unit, at least one hydraulic load that can be pressurized thereby and a control and/or distribution unit connected fluidically between the pressurized-fluid pump and the load. This unit is provided with a housing and a core received therein and connected rigidly with the housing, which core bears with part of its surface in the region of a common, closed, especially cylindrical joint face with the housing on a corresponding inside face of a housing opening. Surface groove-like flow ducts are provided on the core and/or the housing in the region of the joint face, and the pressurized-fluid pump is directly built onto the control and/or distribution unit in the region of a free end face of the core.

Abstract: A hydraulic system, especially in a high-pressure application, comprises a pressurized-fluid tank, a pressurized-fluid pump driven by a drive unit, at least one hydraulic load that can be pressurized thereby and a control and/or distribution unit connected fluidically between the pressurized-fluid pump and the load. This unit is provided with a housing and a core received therein and connected rigidly with the housing, which core bears with part of its surface in the region of a common, closed, especially cylindrical joint face with the housing on a corresponding inside face of a housing opening. Surface groove-like flow ducts are provided on the core and/or the housing in the region of the joint face, and the pressurized-fluid pump is directly built onto the control and/or distribution unit in the region of a free end face of the core.

Abstract: A hydraulic assembly including a reservoir, a pump arrangement, hydraulic control elements, and an electric motor for the pump arrangement whose components are coaxially arranged along a straight axis, possibly overlapping one another partially, is constructed having smaller dimensions and with simpler construction. The pump arrangement is therefore an axial piston pump (2, 2a, 5, 6) whose cylinder block (2) is oriented coaxially to the other components and the cylinder block (2) is provided with several pump elements (6).

Abstract: A system for opening and closing a folding top or moveable vehicle roof of a convertible car is provided, with at least one drive to operate the top or roof, at least one linear position sensor that senses continuously the position of an element of the top or roof and, a controller that receives a signal from the at least one position sensor and generates, a signal to actuate at least one drive. The linear sensor is arranged to determine the position of any element of the folding top or moveable vehicle roof relative to another moveable element of the top or roof or to a fixed element relative to the vehicle.

Abstract: A system for opening and closing a folding top or moveable vehicle roof of a convertible car, with at least one drive means to open and close the folding top or moveable vehicle roof, at least one linear position sensor that senses continuously the position of an element of the folding top or moveable vehicle roof at least over a subrange of its path of movement and, a controller that receives a signal from the at least one position sensor and generates, in consideration of at least one position sensor signal, a signal to actuate at least one drive means, where the linear sensor is arranged in a manner to determine the position of any element of the folding top or moveable vehicle roof relative to another moveable element of the folding top or moveable vehicle roof or to a fixed element relative to the vehicle.

Abstract: A method and apparatus for the actuation of a convertible top system on vehicles whereby the convertible top may be received in its resting position in a compartment that is securable by a cover and whereby the convertible top may be unfolded and secured after opening of the cover, for which purpose there are controllable drive elements provided for the cover and the convertible top. The cover (1) and the convertible top (3) are essentially moved in a parallel manner under certain operational conditions to realize a loading-assistance function in a simple and functionally flexible manner, whereby the convertible top (3) remains in its resting, folded position. The control arrangement for the drive elements of the convertible top system is provided thereby with a switch position in which only one drive element (5) or a group of drive elements is triggered, which lifts the cover (3) from its resting position.

Abstract: An actuation arrangement for displaced components on vehicles, particularly trunk lids, convertible tops, engine hoods or the like, includes at least one supply line for the pressurized medium and one essentially non-pressure connection line to a reservoir for the working medium or a pump arrangement being functionally of the same kind, at least one preferably hydraulic working cylinder, and at least one control valve controlling the supply of a working medium in at least one working chamber of the working cylinder.

Abstract: An actuation arrangement for hinged components of vehicle tops, particularly convertible top hoops or covers for convertible tops, whereby the hinged components are pivotably mounted on the vehicle on at least one main bearing and whereby the actuation arrangement has at least one direct or indirect rotary drive engaging thereon with an indirectly or directly driven rotary shaft. The rotary shaft (W) of the rotary drive (D) is structurally integrated into the main bearing (H) of the hinged component (S, K) of the vehicle top system whereby the main bearing (H) is provided with a receiving or bearing structure (2) for the rotary shaft (W) of the rotary drive (D) to create a simple construction, which produces a constant moment while requiring a small mounting space and having a low weight and which is possibly suited for any swing angle in principle.

Abstract: In a radial piston pump (2), which has pump elements (10) arranged radial in the pump housing (7) and which in turn have an inlet valve (11) and an outlet valve (12) activated by the medium, the valves (11, 12) are disposed at the outer side of the pump elements (10) whereby the inlet valves (11) are arranged coaxial relative to the pump piston (13). All inlet valves (11) are connected to a joint intake channel (20) that leads around the outside of the pump housing (7).

Abstract: An actuation arrangement for displaced components on vehicles, particularly trunk lids, convertible tops, engine hoods or the like, includes at least one supply line for the pressurized medium and one essentially non-pressure connection line to a reservoir for the working medium or a pump arrangement being functionally of the same kind, at least one preferably hydraulic working cylinder, and at least one control valve controlling the supply of a working medium in at least one working chamber of the working cylinder.

Abstract: A hydraulic actuating system for movable parts, particularly for hinged covers on vehicles, includes at least one or more working cylinders with a piston equipped with sealing means pressing against the cylinder wall. A control unit is connected with one or all cylinders, and a pressure sensor connected to a control unit. Devices on the cylinder and piston are designed to cause pressure modulation in the cylinder and a common hydraulic circuit. The outgoing signals from the pressure sensor, are changed corresponding to the pressure modulations and are transmitted to the control unit to be used for position control and/or identification of one or all cylinders by the control unit.

Abstract: An actuation arrangement for hinged components on vehicles such as rear covers, trunk lids, covers for convertible tops or convertible top components themselves, having at least one fluid drive engaging the hinged component directly or indirectly, the fluid drive of the arrangement driving a rotary shaft (W) to realize a constant moment at a small mounting space as wells as a suitable configuration for principally any rotation angle. The rotary shaft, which lies in the swiveling axis (A) of the hinged component (V), is non-rotatably connected to the hinged component (V), possibly via an interconnected lever (H).