Control valve with optimized cross-section
AssigneeSchwäbische Hüttenwerke Automotive GmbH
InventorsStefan Küchle, Thomas Tontsch, Simone Schilling
Life of this patent
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Abstract
A control valve for a pump for delivering a fluid. The control valve includes: a valve housing which delineates a piston chamber; a piston which can be moved within the piston chamber; and a fluid channel which ports into the piston chamber via a port opening, wherein the port opening defines a port control edge. The valve housing includes a recess which extends into the fluid channel, wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or the piston includes a piston recess which defines a piston recess control edge.
Claims16
A control valve for a pump for delivering a fluid, the control valve comprising:
- (a) a valve housing which delineates a piston chamber;
- (b) a piston which can be moved within the piston chamber, axially along its longitudinal axis;
- and
- (c) a fluid channel which ports into the piston chamber via a port opening, wherein
- (d) the port opening defines a port control edge,
- wherein
- (e) the valve housing comprises a recess which extends into the fluid channel, wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or
- (f) the piston comprises a piston recess which defines a piston recess control edge,
- wherein in a sectional view of the piston chamber, the recess control edge and an alignment of the recess control edge form a secant in relation to the outer circumference of the port opening.
A control valve for a pump for delivering a fluid, the control valve comprising:
- (a) a valve housing which delineates a piston chamber;
- (b) a piston which can be moved within the piston chamber, axially along its longitudinal axis;
- and
- (c) a fluid channel which ports into the piston chamber via a port opening, wherein
- (d) the port opening defines a port control edge,
- wherein
- (e) the valve housing comprises a recess which extends into the fluid channel,
- wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or
- (f) the piston comprises a piston recess which defines a piston recess control edge,
- wherein the flow cross-section of the port opening is reduced by the piston to an effective flow cross-section in a first and/or second piston position, and the recess increases the effective flow cross-section in the second piston position only.
A control valve for a pump for delivering a fluid, the control valve comprising:
- (a) a valve housing which delineates a piston chamber;
- (b) a piston which can be moved within the piston chamber, axially along its longitudinal axis;
- and
- (c) a fluid channel which ports into the piston chamber via a port opening, wherein
- (d) the port opening defines a port control edge,
- wherein
- (e) the valve housing comprises a recess which extends into the fluid channel,
- wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or
- (f) the piston comprises a piston recess which defines a piston recess control edge,
- wherein the recess is a crescent-shaped groove which is open towards the piston chamber, in the inner surface area of the valve housing.
Dependencies are inferred from the claim text.