Abstract: The invention relates to a method for monitoring operating parameters of an actuator (10), wherein the method comprises: providing the actuator (10), providing at least two detection units (26, 28, 30, 32, 34, 36) which are designed to detect different operating parameters of the actuator (10), detecting operating parameters of the actuator (10) via the detection units (26, 28, 30, 32, 34, 36), outputting data relating to the measured operating parameters to an evaluation unit, combining the measured operating parameters into a state information, which indicates whether or not the technical state of the actuator (10) is in a predetermined standard state.

Abstract: The invention relates to a method for measuring the position of a piston-cylinder arrangement, said method comprising: providing the piston-cylinder arrangement, providing an electrical circuit unit, applying a DC voltage (Vcc) to the piston-cylinder arrangement, sensing a capacitance (C) of the piston-cylinder arrangement as an input variable for the electrical circuit unit, generating a pulsed DC voltage (Vcc) by means of the electrical circuit unit on the basis of the sensed capacitance (C) of the piston-cylinder arrangement, providing a measuring unit for measuring a frequency (F0, F1) of the pulsed DC voltage (Vcc) generated, determining a frequency difference (DF) between the frequency (F0) of the pulsed DC voltage (Vcc) before displacement of the piston within the cylinder and the frequency (F1) of the pulsed DC voltage (Vcc) after displacement of the piston within the cylinder, determining a displacement distance of the piston within the cylinder on the basis of the frequency difference (DF).

Abstract: The invention relates to a method for monitoring operating parameters of an actuator (10), wherein the method comprises: providing the actuator (10), providing at least two detection units (26, 28, 30, 32, 34, 36) which are designed to detect different operating parameters of the actuator (10), detecting operating parameters of the actuator (10) via the detection units (26, 28, 30, 32, 34, 36), outputting data relating to the measured operating parameters to an evaluation unit, combining the measured operating parameters into a state information, which indicates whether or not the technical state of the actuator (10) is in a predetermined standard state.

Abstract: The invention relates to a method for measuring the position of a piston-cylinder arrangement, said method comprising: providing the piston-cylinder arrangement, providing an electrical circuit unit, applying a DC voltage (Vcc) to the piston-cylinder arrangement, sensing a capacitance (C) of the piston-cylinder arrangement as an input variable for the electrical circuit unit, generating a pulsed DC voltage (Vcc) by means of the electrical circuit unit on the basis of the sensed capacitance (C) of the piston-cylinder arrangement, providing a measuring unit for measuring a frequency (F0, F1) of the pulsed DC voltage (Vcc) generated, determining a frequency difference (DF) between the frequency (F0) of the pulsed DC voltage (Vcc) before displacement of the piston within the cylinder and the frequency (F1) of the pulsed DC voltage (Vcc) after displacement of the piston within the cylinder, determining a displacement distance of the piston within the cylinder on the basis of the frequency difference (DF).

Abstract: A piston-cylinder unit with a center longitudinal axis, a first end, a cylinder filled with a fluid, a piston arranged so as to be displaceable in the cylinder and which divides the cylinder into a first work space remote of the first end and a second work space close to the first end. A piston rod is arranged at the piston and projects through the first work space and is guided out of the cylinder concentric to the center longitudinal axis at a second end opposite the first end so as to be sealed by a guiding and sealing device, and a sensor device for direct or indirect detection of the internal pressure of the piston-cylinder unit.

Abstract: An adjusting element with a closed first end, a cylinder, a piston displaceably arranged in the cylinder that divides the cylinder into a first work space remote of the first end and a second work space in proximity to the first end, and a piston rod which is arranged at one side of the piston and which projects through the first work space and is guided out of the cylinder concentric to or center longitudinal axis of the cylinder at a second end opposite from the first end so as to be sealed by a guiding and sealing device. The adjusting element has a device for detecting the piston rod position and/or the extended length of the adjusting element. The device for detecting the piston rod position includes a microswitch arranged at the cylinder and at least one switching element cooperating with the microswitch.

Abstract: A piston-cylinder unit for pivoting a flap with respect to a motor vehicle body includes a cylinder having an open end with a seal, a closed end, and an interior space between the ends; a piston unit axially movable in the cylinder, the piston unit dividing the interior space into a first working space and a second working space; a piston rod connected to the piston unit and extending through the first working space and the seal; and flow connections connecting the first working space to the second working space. A switch element arranged outside the cylinder is switched in response to movement of the piston with respect to the cylinder.

Abstract: A piston-cylinder unit with a center longitudinal axis, a first end, a cylinder filled with a fluid, a piston arranged so as to be displaceable in the cylinder and which divides the cylinder into a first work space remote of the first end and a second work space close to the first end. A piston rod is arranged at the piston and projects through the first work space and is guided out of the cylinder concentric to the center longitudinal axis at a second end opposite the first end so as to be sealed by a guiding and sealing device, and a sensor device for direct or indirect detection of the internal pressure of the piston-cylinder unit.

Abstract: A piston/cylinder unit includes a closed cylinder filled with a fluid under pressure, a piston dividing the cylinder into a first working chamber and a second working chamber, and a piston rod extending through the second working chamber. A passage through the piston connects the first working chamber to the second working chamber, and a valve closing member is movable between an open position and a closed position wherein the member closes the passage. A solenoid includes a coil, a coil core, and an armature in the piston, the armature driving the valve closing member between the closed position and the open position in response to a magnetic field produced by a current applied to the coil, the cylinder forming a magnetic field guide tube. The coil is supplied with current by a power line in the piston rod, and may be grounded to the piston rod or the cylinder.

Abstract: An adjusting element with a closed first end, a cylinder, a piston displaceably arranged in the cylinder that divides the cylinder into a first work space remote of the first end and a second work space in proximity to the first end, and a piston rod which is arranged at one side of the piston and which projects through the first work space and is guided out of the cylinder concentric to or center longitudinal axis of the cylinder at a second end opposite from the first end so as to be sealed by a guiding and sealing device. The adjusting element has a device for detecting the piston rod position and/or the extended length of the adjusting element. The device for detecting the piston rod position includes a microswitch arranged at the cylinder and at least one switching element cooperating with the microswitch.

Abstract: A piston-cylinder unit for pivoting a flap with respect to a motor vehicle body includes a cylinder having an open end with a seal, a closed end, and an interior space between the ends; a piston unit axially movable in the cylinder, the piston unit dividing the interior space into a first working space and a second working space; a piston rod connected to the piston unit and extending through the first working space and the seal; and flow connections connecting the first working space to the second working space. A switch element arranged outside the cylinder is switched in response to movement of the piston with respect to the cylinder.

Abstract: An adjusting element with a cylinder which is closed at one end and filled with a fluid under pressure, wherein a piston which is displaceable axially in the cylinder divides the cylinder into a first work space and a second work space, and a piston rod is arranged at one side of the piston and guided out of the other end of the cylinder through the first work space in a sealed manner by a sealing and guiding device. The adjusting element has a measuring device for detecting the piston rod position and the length of extension of the adjusting element.

Abstract: A piston/cylinder unit includes a closed cylinder filled with a fluid under pressure, a piston dividing the cylinder into a first working chamber and a second working chamber, and a piston rod extending through the second working chamber. A passage through the piston connects the first working chamber to the second working chamber, and a valve closing member is movable between an open position and a closed position wherein the member closes the passage. A solenoid includes a coil, a coil core, and an armature in the piston, the armature driving the valve closing member between the closed position and the open position in response to a magnetic field produced by a current applied to the coil, the cylinder forming a magnetic field guide tube. The coil is supplied with current by a power line in the piston rod, and may be grounded to the piston rod or the cylinder.