Valve for controlling fluids
AssigneeRobert Bosch GmbH
InventorTimo Kegel
Life of this patent
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Abstract
A valve for controlling fluids for reservoir injection systems, includes a hydraulic coupler and a piezoelectric actuator. The hydraulic coupler includes a first piston, a second piston, and a coupler chamber disposed between the two pistons. The piezoelectric actuator is in communication with the first piston. The first piston is embodied as substantially cup-shaped, and the second piston is disposed in a recess in the first piston. The coupler chamber is disposed between the second piston and an inner bottom region of the first piston. As a result, a hydraulic coupler of compact design can be furnished without reversing the direction of motion of the two pistons.
Claims13
In a valve for controlling fluids for a reservoir injection system, including a hydraulic coupler (2) with a first piston (3), a second piston (6), and a fluid-filled coupler chamber (7) disposed between the two pistons, a piezoelectric actuator (13), which is in communication with the first piston (3), the improvement wherein the first piston (3) is embodied as substantially cup-shaped and has a recess (4) and an inner bottom region (5);
- the second piston (6) is disposed in the recess (4) in the first piston (3);
- the coupler chamber (7) is disposed between the second piston (6) and the inner bottom region (5) of the first piston (3);
- and a rigid guide element (8;
- 8′) disposed in the recess (4) of the first piston (3), for guiding the second piston (6) in the recess of the first piston (3).
Dependencies are inferred from the claim text.