Patent ID: 7017883
Filing Date: 2006-03-28
Classification: B60B,B60T,F16D,F16K,Y10T

Abstract:
1. Piezoelectrically actuated fluid valve, in particular for an electronically controllable motor vehicle brake system, comprising: a valve housing opening into which is at least one flow channel, at whose port a valve seat is provided with which a valve closure member is associated that is operable by a piezoelectric bending transducer arranged in the valve housing for opening and closing the valve seat, said bending transducer being configured as a transverse beam that is fixed in the area of its first end in the valve housing by means of an immovable bearing, including an electrical contacting in the area of the immovable bearing for the actuation of the bending transducer, the bending transducer including a movable bearing in the valve housing at its second end remote from the immovable bearing, and in that the valve closure member points to the valve seat in a defined partial span width, preferably at half the span width, between the two ends of the bending transducer, the valve closure member being fitted to a valve tappet whose tappet head, under the effect of a valve spring, is urged against the bending transducer at a defined distance between the immovable and the movable bearing, with said valve tappet close to the valve closure member being centered with regard to the valve seat by means of a guiding sleeve, at which the end of the valve spring remote from the tappet head is supported, wherein the tappet head is adjustable lengthwise by means of a press fit at the valve tappet.