摘要 |
A valve for metering fluid having a valve assembly which meters the fluid, and a hydraulic coupler assigned to the valve assembly. The coupler has a housing cup having a cup bottom, cup wall and cup opening; a piston is guided inside the housing cup in axially displaceable manner and delimits a fluid-filled coupler gap in the direction of the cup bottom and delimits an annular gap in the direction of the cup wall; and a cap-shaped diaphragm having a cap bottom and cap shell, which covers the annular gap at the cup opening by the cap bottom and overlaps the cup wall of the housing cup by the cap shell, and is fixed in place at the piston and cup wall in fluid-tight manner. To achieve a sufficiently large volume of the compensating volume enclosed between the diaphragm on the one side and the piston and housing cup on the other side, that is able to accommodate volume changes of the fluid volume in the coupler gap created under pressure, the cap shell includes elastic deformation regions, which follow one another in the circumferential direction, point radially toward the inside, and extend in the radial direction. |