Valve with radial recesses

In a valve including a valve needle (2) which is axially displaceable in a bore (5) of a valve body (3) and which on one end has a conical valve needle tip (4), the valve needle tip (4) including a radial valve sealing face (9), which in the closing position of the valve comes to rest on a conical inner wall (6) of the valve body on the closed end of the bore (5), at least one opening (7) in the inner wall (6) of the valve body, which opening connects the bore (5) with the outside (8) of the valve body (3), the improvement wherein the valve comprises two radial recesses (12, 13, 16, 17), which are disposed in the valve needle tip (4) or in the inner wall (6) of the valve body, and one of the radial recesses (13, 17) is located upstream (10) and the other radial recess (12, 16) is located downstream (11) from the position of the valve sealing face (9), in the closing position of the valve, wherein the conical valve needle tip (4) comprises a jacket face which includes at least two regions with different cone angles, and wherein the jacket face of the valve needle tip (4) comprises three regions with different cone angles (δ1, δ2, δ3), and wherein the three regions, in the closing position of the valve, are each separated from one another by one of the two radial recesses (12, 13, 16, 17), and the cone angles (δ1, δ2, δ3) of the three regions become larger downstream (11).

In a valve including a valve needle (2) which is axially displaceable in a bore (5) of a valve body (3) and which on one end has a conical valve needle tip (4), the valve needle tip (4) including a radial valve sealing face (9), which in the closing position of the valve comes to rest on a conical inner wall (6) of the valve body on the closed end of the bore (5), at least one opening (7) in the inner wall (6) of the valve body, which opening connects the bore (5) with the outside (8) of the valve body (3), the improvement wherein the valve comprises two radial recesses (12, 13, 16, 17), which are each disposed within a respective surface in the valve needle tip (4) or in the inner wall (6) of the valve body, and each recess providing an indentation from its respective surface which is spaced away from an opposing surface of either the inner wall of the valve body or the valve needle tip by a distance which is greater than any other portion of its respective surface, wherein one of the radial recesses (13, 17) is located upstream (10) and the other radial recess (12, 16) is located downstream (11) from the position of the valve sealing face (9), in the closing position of the valve.