Electromagnetic actuating device particularly for opening and closing valve device, valve device having actuating device, controllable vibration damper comprising actuating device, and motor vehicle having vibration damper

Abstract

The present invention relates to an electromagnetic actuating device, particularly for opening and closing a valve device (560). The electromagnetic actuating device comprises a coil unit (562) whichcan be supplied with current and by means of which, when current is supplied thereto, an armature (564) mounted to be movable along a longitudinal axis (L) of the actuating device (12) can be moved between a retracted position and an extended position; a ram (566) which interacts with the armature (564) and is mounted to be movable along the longitudinal axis (L). The ram has a first end (598), with which the ram (566) interacts with a closure element (574) for opening and closing the valve device (560), and a second end (600), the ram (566) is arranged such that the ram projects with the first end (598) thereof into a first chamber (586) in which a pressure medium is held under a first pressure (p1), and the ram projects with the second end (600) thereof into a second chamber (588), in which the pressure medium is held under a second pressure (p2). The invention further relates to the valve device (560) having the actuating device (12). The invention further relates to a controllablevibration damper (10) which comprises the actuating device (12), and to a motor vehicle (610) having the controllable vibration damper (10).

Description

technical field [0001] The invention relates to a solenoid actuating device, in particular for opening and closing a valve arrangement, and to a valve arrangement having such an actuating device. The invention also relates to an adjustable shock absorber comprising such an adjustment device and a motor vehicle having such a shock absorber. Background technique [0002] Solenoid regulators are used in particular to open and close all types of valves. According to a typical construction, the electromagnetic adjusting device comprises an energizable coil unit, by means of which in the energized state an armature movably supported along the longitudinal axis of the adjusting device can be moved in a retracted position and extended relative to the pole core. Move between locations. Furthermore, the electromechanical adjusting device has a tappet which cooperates with the armature and is mounted displaceably along the longitudinal axis, the tappet having a first end with which t...

AI Technical Summary

Problems solved by technology

Therefore, even a small increase in volume flow leads to a sudden increase in the fluid force acting on the tappet and closing element, which cannot easily be compensated by magnetic and return forces

This leads to an uncontrolled opening and closing behavior of the closure element

A great deal of adjustment work is required to adapt the magnetic force to the opening and closing behavior, and high currents must be used, which on the one hand uneconomically operates the electromechanical adjustment device and on the other hand generates relatively large amounts of heat in the electromechanical adjustment device, which Difficult to dissipate, thus leading to increased wear from thermal loads

In addition, there may be operating states in which the fluid forces acting on the closure element suddenly increase so much that the closure element cannot be opened at all again

Depending on the design of the valve unit, no countermeasures can be taken, so this operating state must be avoided, which limits the range of applications of electromechanical adjustment devices and valve units

Images