| CPC F16K 39/022 (2013.01) [F02B 37/183 (2013.01); F16K 1/36 (2013.01); F16K 31/0655 (2013.01); F16K 27/029 (2013.01)] | 15 Claims |
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1. An overrun-air recirculation valve comprising:
a flow housing comprising a flow channel between an inlet and an outlet;
a valve seat formed between the inlet and the outlet;
an actuator;
an actuating member which is configured to be translationally movable via the actuator; and
a control body which is fastened to the actuating member, the control body comprising,
a radially outer circumferentially closed lateral outer surface which comprises, at an axial end, a circumferential bearing edge which is configured to be placed onto the valve seat and to be lifted off of the valve seat,
a radially inner axial flow-on surface which is arranged on an axial side facing away from the actuating member, and
a wall comprising,
a first cylindrical section,
a second cylindrical section, and
a radial constriction which is substantially perpendicular to each of the first cylindrical section and to the second cylindrical section,
wherein,
the radial constriction comprises an inner diameter and an outer diameter,
the first cylindrical section extends from the outer diameter of the radial constriction towards a direction of the inlet,
the second cylindrical section extends from the inner diameter of the radial constriction towards the actuating member,
the wall is arranged to extend at least radially inwardly from the radially outer circumferentially closed lateral outer surface, and
the radial constriction of the wall comprises at least one opening via which an interior of the overrun-air recirculation valve is always fluidically connected to the flow channel,
wherein,
a pressure equalization between the interior and the inlet occurs exclusively via the at least one opening, and
the radially inner axial flow-on surface comprises a radially outer annular flow-off edge, the radially outer annular flow-off edge being offset in an axial direction relative to the circumferential bearing edge by a maximum amount so that,
a first vector which extends radially outwardly from the radially outer annular flow-off edge to a nearest point of the circumferential bearing edge to a plane which is spanned by the circumferential bearing edge encloses an angle of at most 15°,
the wall with the at least one opening is offset axially with respect to the circumferential bearing edge and with respect to the radially outer annular flow-off edge in a direction of the actuating member, and
when the control body is moved upwards via the actuating member, the air in the interior is directed through the at least one opening in the wall and between the radially outer circumferentially closed lateral outer surface and the radially outer annular flow-off edge of the radially inner axial flow-on surface.
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