Arrangement for adjusting a valve

An arrangement for adjusting a valve having a tappet which is under the effect of a restoring spring, comprising:

• a housing to be attached to the valve;
• a pressure unit fitted in the housing;
• an axially adjustable working piston bearing against an end face of the tappet of the valve:
• a temperature-dependent actuating element disposed in the housing cooperating with the working piston and extending essentially transversely to the motional direction of the working piston, wherein the actuating element is a metallic structural part of an alloy with impressed shape memory configured as a rectangular strip extending essentially transversely to the motional direction of the working piston;
• a spring plate configured for motion in the direction of the axis of the pressure unit and made of mechanically stable plastic positioned between the actuating element and a first end of the pressure unit;
• and
• an electric heating element integrated in said spring late on a side of the spring plate facing the actuating element and in between the actuating element and the first end of the pressure unit;
• wherein the metallic structural part, when heated in a first end position, assumes a shape corresponding to the impressed shape memory,
• wherein the first end of the pressure unit acts upon the metallic structural part and holds the metallic structural part in a second end position when metallic structural part is not heated, and
• wherein the actuating element, inclusive of the working piston, is adjustable in its motional direction between the first and second end positions corresponding to an open position of the valve, and a closed position of the valve, respectively.