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Special form of vane machines , in which six "vanes" (sealing edges) are placed on the rotor. Sealing between the suction and pressure chamber is performed by four synchronous-running sealing rotors (

Central position for valves with three switching positions . With directional valves , it is generally arranged with the help of centring springs and then becomes the initial position . Around 14 vari

Process of searching for a mathematical model for an actual system which provides a satisfactory description of its stationary and dynamic characteristics. This makes it necessary to define the struct

Flow rate coming from the pump, which a hydraulic motor takes on, depending on its displacement volume (geometric displacement). It is calculated as the product of the displacement and the rotation sp

Describes the increase in viscosity of mineral oils given increasing pressure . This increase gets bigger as the nominal viscosity increases (= viscosity/pressure characteristic at +50°C or recently +

Change of the over time during the switching process. In addition to the design, the switching behaviour of devices depends primarily on the method of operation of the switching element . In the case

Hysteresis for pressure valves resulting from springs, the mechanical friction associated with the piston and flow forces. It ensures the closing pressure for a pressure valve is always lower than the

Valve actuation is performed by means of a control impulse. Here, the switching time depends on whether direct or indirect actuation is involved, with switching being far shorter for the latter (a few

The time after a step change in the correcting variable defined by the intersections between the first inflection tangent and the abscissa, and the line parallel to the abscissa through the value in t

Flow rate that the source controlling an element must provide to control the element reliably.