Hydraulic actuating system for movable parts
AssigneeHoerbiger Hydraulik GmbH
InventorKlaus Stolle
Life of this patent
Estimating the term…
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.
Claims15
A hydraulic actuating system comprising:
- a hydraulic circuit;
- a plurality of working cylinders with respective switching elements connected to said hydraulic circuit, each of said working cylinders including a cylinder having a cylinder wall and a piston movably positioned within said cylinder, said piston including a peripheral sealing means for contacting said cylinder wall,
- a control unit connected to said hydraulic circuit,
- a pressure sensor connected to said hydraulic circuit for providing pressure signals to said control unit based on pressure modulation within said hydraulic circuit,
- and wherein at least one of said plurality of working cylinders includes means for pressure modulation according to a typical pattern of pressure modulation for identifying said one working cylinder.
A hydraulic actuating system comprising:
- a hydraulic circuit;
- a working cylinder connected to said hydraulic circuit, said working cylinder including a cylinder having a cylinder wall and a piston movably positioned within said cylinder, said piston including a peripheral sealing means for contacting said cylinder wall,
- a control unit connected to said hydraulic circuit,
- a pressure sensor connected to said hydraulic circuit for providing pressure signals to said control unit based on pressure modulation within said hydraulic circuit,
- and wherein cooperating portions of said cylinder wall and said piston periphery have different cross-sectional areas so as to create pressure modulations in said hydraulic circuit as said piston moves within said cylinder to thereby enable control and position identification of said piston by said control unit.
A hydraulic actuating system comprising:
- a hydraulic circuit;
- a working cylinder connected to said hydraulic circuit, said working cylinder including a cylinder having a cylinder wall and a piston movably positioned within said cylinder, said piston including a peripheral sealing means for contacting said cylinder wall,
- a control unit connected to said hydraulic circuit,
- a pressure sensor connected to said hydraulic circuit for providing pressure signals to said control unit based on pressure modulation within said hydraulic circuit,
- and wherein the cylinder wall includes a plurality of equally spaced devices along a length thereof for pressure modulation.
A method for position control or identification of a working cylinder in a hydraulic circuit for movable components, said working cylinder including a piston that is movable therein in strokes, whereby pressure in the hydraulic circuit is measured with a pressure sensor and a corresponding signal is then transmitted to a control unit to be analyzed;
- wherein the pressure in the hydraulic is modulated during movement of the piston in a predetermined portion along the piston stroke by a change in the friction of piston movement, and a pressure sensor creates a signal corresponding to the pressure modulation and is then transmitted to the control unit of the actuating system to be analyzed, thereby identifying at least one of the position of the piston in the working cylinder and the individual cylinder causing the pulse modulation.
A combination of hydraulic actuating system a vehicle convertible top system with a multi-sectional frame construction and a cover hatch, and a hydraulic actuating system for operation of said convertible top system, said hydraulic actuating system comprising:
- a hydraulic circuit;
- a plurality of working cylinders with respective switching elements connected to said hydraulic circuit, each of said working cylinders including a cylinder having a cylinder wall and a piston movably positioned within said cylinder, said piston including a peripheral sealing means for contacting said cylinder wall,
- a control unit connected to said hydraulic circuit,
- a pressure sensor connected to said hydraulic circuit for providing pressure signals to said control unit based on pressure modulation within said hydraulic circuit,
- and wherein at least one of said plurality of working cylinders includes means for pressure modulation according to a typical pattern of pressure modulation for identifying said one working cylinder.
Dependencies are inferred from the claim text.