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A valve device, comprising a valve tappet (18), which causes a controlled opening or blocking of a fluid flow channel (16) in an engagement position on a valve seat (22) and which can be brought from a starting position to the engagement position as a reaction to an application of pressure by means

A valve device, comprising a valve tappet (18), which causes a controlled opening or blocking of a fluid flow channel (16) in an engagement position on a valve seat (22) and which can be brought from a starting position to the engagement position as a reaction to an application of pressure by means of a pressure fluid, wherein the pressure fluid is conveyed by electromagnetically driven pumping element (24) into a pressure chamber (44) associated with the valve tappet in such a way that the application of pressure for driving the valve tappet is accomplished by a plurality of pumping strokes of the pumping element, which has a conveying piston (26), in particular a reciprocating piston.

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1. A valve device comprising a valve tappet (18) that effects a controlled opening or blocking of a fluid flow channel (16) in an engaged position on a valve seat (22), which is movable from a starting position into the engagement position in response to pressure loading with a pressure fluid, where

1. A valve device comprising a valve tappet (18) that effects a controlled opening or blocking of a fluid flow channel (16) in an engaged position on a valve seat (22), which is movable from a starting position into the engagement position in response to pressure loading with a pressure fluid, wherein pressure fluid drawn from the fluid flow channel is conveyed by electromagnetically driven pumping means (24) into a pressure chamber (44) assigned to the valve tappet in such manner that the pressurization for driving the valve tappet is achieved through multiple pump strokes of the pumping means that comprise a delivery piston (26). 2. The device according to claim 1, wherein the delivery piston comprises a reciprocating piston (26) that executes a translationally oscillating movement, and which functions as an anchor of a coil unit (32) that is provided in stationary manner and is actuatable by application of a current. 3. The device according to claim 2, wherein a supply of the current has a first and a second signal level, each being different from a non-energized state, for defining pump stroke, and a frequency of signal change between the first and the second signal levels determines an oscillation frequency of movement of the reciprocating piston. 4. The device according to claim 2, wherein the valve tappet (18) is biased toward the starting position against a restoring force of a return spring means (48), and venting means (50) are assigned to the pressure chamber and arranged such that in a non-energised state of the coil unit, load is removed from the pressure fluid in the pressure chamber. 5. The device according to claim 4, wherein the venting means (50) are actuated in response to an actuating position of the reciprocating piston in a non-energized state, directly or via a mechanical connecting element (54) cooperating with the reciprocating piston. 6. The device according to claim 1, wherein an intake (34) for the pressure fluid is assigned to the pumping means. 7. The device according to claim 6, wherein the intake is able to be opened to the fluid flow channel (16). 8. The device according to claim 1, wherein control means assigned to the pumping means are designed and/or configured such that the valve tappet is driven in response to at least 10 pump strokes. 9. The device according to claim 8, wherein the control means assigned to the pumping means are designed and/or configured such that the valve tappet is driven in response to at least 20 pump strokes. 10. The device according to claim 8, wherein the control means assigned to the pumping means are designed and/or configured such that the valve tappet is driven in response to at least 30 pump strokes. 11. The device according to claim 1, wherein a pressure relief valve (48) having a predetermined opening threshold is assigned to the pressure chamber in such manner that the pump strokes can be executed even in the engaged position. 12. The device according to claim 1, wherein the delivery piston (26) is a reciprocating piston.