Switching element for a valve train of an internal combustion engine

A switching element for a valve train of an internal combustion engine, the switching element comprising:

• an external part;
• an internal part, configured to be:
• i) axially displaced in a bore of the external part and, ii) -displaced relative to the external part into a coupling position in which at least one radially extending receptacle of the internal part overlaps with at least one radially extending recess of the external part;
• and
• at least one locking element slidably guided within the at least one radially extending receptacle, the at least one locking element having a flattened portion on a radially outwardly directed end;
• and
• a locking section defined on the flattened portion of the at least one locking element, the locking section engaging in the at least one radially extending recess of the external part in a locking position of the at least one locking element and in the coupling position of the internal part and the external part;
• and
• the at least one radially extending recess of the external part is configured to be acted upon by a control pressure and the at least one locking element is configured to be radially displaced from the locking position to a release position, in which the at least one locking element is displaced radially inwardly via the control pressure into the at least one radially extending receptacle;
• and
• at least in the locking position of the at least one locking element, a chamber delimited by the at least one locking element is spatially separated from the at least one radially extending recess of the external part by the locking section;
• and
• when the locking section is in axial contact with the external part in the locking position, at least one bypass is arranged to indirectly fluidly connect the at least one radially extending recess of the external part to the chamber at least until the chamber is fluidly connected directly to the at least one radially extending recess during a course of displacement of the at least one locking element;
• and
• the at least one bypass is formed by a cut-out arranged on or within the at least one locking element.

A switching element for a valve train of an internal combustion engine, the switching element comprising:

• a cylindrical external part having:
• a first longitudinally extending bore;
• and
• at least one second radially extending bore;
• a cylindrical internal part configured to be axially displaceable within the first longitudinally extending bore, the cylindrical internal part having:
• at least one radially extending receptacle;
• and
• a circumferential groove arranged on an outer jacket of the cylindrical internal part, the circumferential groove extending radially inwardly from the outer jacket such that the circumferential groove defines a first radial depth relative to the outer jacket;
• and
• at least one locking element disposed within the at least one radially extending receptacle, the at least one locking element having a flattened portion configured to engage the cylindrical external part in a first locking position of the at least one locking element, the flattened portion forming a chamber with the first longitudinally extending bore, the chamber directly fluidly disconnected from the at least one second radially extending bore in the first locking position, and anti-rotation of the at least one locking element relative to the at least one radially extending receptacle is provided via the circumferential groove;
• and
• the at least one second radially extending bore configured to receive a control pressure configured to move the at least one locking element to a second release position;
• and
• when the flattened portion is in axial contact with the cylindrical external part in the first locking position, at least one bypass is configured to indirectly fluidly connect the at least one second radially extending bore to the chamber in the first locking position;
• and
• the at least one bypass is formed by a cut-out:
• extending radially inwardly from the outer jacket of the cylindrical internal part to the at least radially one extending receptacle such that the cut-out penetrates the at least one radially extending receptacle at a second radial depth, the second radial depth:
• i) relative to the outer jacket, and ii) greater than the first radial depth of the circumferential groove.