 Control valve including a piston cylinder connected to a spring steel sealing member |
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| Apparatus for dispensing heated fluid materials |
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| Thermal barrier for hot glue adhesive dispenser |
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| Bottom feed injector with top calibration feed |
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| Apparatus for dispensing an adhesive |
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| Liquid storing and dispensing unit |
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| Hydraulic pressure reducing control valve |
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| Mixing and dispensing machine |
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| Apparatus for discharging material |
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| Liquid dispenser |
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Hydraulic adjustable shock absorber
| Details |
Inventors: Knecht, Heinz; Preukschat, Alfred;
Assignee: Boge AG (Eitorf, DE)
Primary Examiner: Kashnikow; Andres
Assistant Examiner: Graham; Matthew C.
Attorney, Agent or Firm: Ljungman; Nils H.
Shock absorber for motor vehicles, on which there is a damping element, which exhibits a working cylinder to hold a working medium, divided by a piston into two working chambers, whereby an electromagnetically-activated and axially-movable valve body of the valve pressurizes a flow passage, at least partly to control the damping force. The object of the invention is to make possible a variable damping adjustment, whereby by means of a variably-controllable damping valve, an adjustable damping of the decompression and compression stages can be achieved. In addition, by variation of the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, designed as the armature of an electromagnet, can be influenced. The object is achieved by the formation of a valve seat by a seat surface oriented at approximately right angles to the valve body, together with the end surface of the valve body and of the valve seat are at a distance from one another. As a result of this configuration, a partial pressure reduction can be achieved in the vicinity of the valve seat, which influences the valve body. |
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DETAILED DESCRIPTION This object is achieved in that a seat surface oriented at approximately right angles to the axis of rotation of the valve body, together with the end surface of the valve body, forms a valve seat, and that at least a portion of the end surface of the valve body and of the valve seat are located at a distance from one another.
An advantage of this solution is that such a damping valve, or variants thereof, can be installed in the vibration damping system of a motor vehicle.
The possibility exists of orienting the damping valve parallel to the conventional throttle valves in the damping piston and/or in the cylinder bottom, or it can be located in the damping piston and only the check valves, if any, can be located in the cylinder bottom, so that the damping valve is installed in a bypass.
In applications with lockable vibration dampers, the damping valve can be installed without other throttle valves being located in the damping piston and in the vicinity of the bottom.
Another advantage is that by optimizing the hydraulically-influenced functional surfaces of the valve body in relation to one another, a rapid and secure closing and opening action can be achieved under all operating conditions, which makes possible a compact construction with a low electric power consumption.
On account of the configuration as an electromagnetic seat valve with an axially-movable valve body in a slot guide, and the fact that the valve body can be pressurized on both end surfaces, the valve can be opened by means of magnetic force, and closed by means of the elasticity and hydraulic pressure of the damping system itself.
This makes possible the use of very small electromagnets, since only a small amount of electric power is necessary.
In one configuration of the invention, the valve body has a cylindrical outside surface.
In accordance with one essential feature, the pressurized end surface of the valve body located at a distance is smaller that the rear pressurized end surface of the valve body
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Control Computers 
