Cylinder head cover for an internal combustion engine , comprising: - a cover body which, in the assembled state of the cylinder head cover , is arranged on an engine block of the internal combustion engine and covers a cylinder head of the internal combustion engine ; - a separation device through which a crude gas stream can be fed for the purification thereof, wherein the separation device is formed and/or bounded at least in sections by the cover body ; and/or - a valve device which is formed and/or bounded at least in sections by the cover body , wherein the cylinder head cover comprises a nozzle device which is integrated into the separation device and/or into the valve device , wherein the nozzle device comprises a suction jet nozzle by means of which a gas stream can be drawn in and/or removed, wherein the suction jet nozzle comprises a suction section into which, on the one hand, a drive nozzle of the suction jet nozzle and, on the other hand, a gas stream supply open, wherein the suction section has at least two parts, wherein an inner part with respect to a radial direction is formed by an insertion element which has a substantially constant outer cross-section along a flow direction and/or a varying inner cross-section along a flow direction , wherein the insertion element can be inserted into an outer part of the suction section with respect to a radial direction, characterized in that the insertion element can be introduced into the outer part of the suction section counter to the flow direction . - a cover body which, in the assembled state of the cylinder head cover , is arranged on an engine block of the internal combustion engine and covers a cylinder head of the internal combustion engine ; - a separation device through which a crude gas stream can be fed for the purification thereof, wherein the separation device is formed and/or bounded at least in sections by the cover body ; and/or - a valve device which is formed and/or bounded at least in sections by the cover body , wherein the cylinder head cover comprises a nozzle device which is integrated into the separation device and/or into the valve device , wherein the nozzle device comprises a suction jet nozzle by means of which a gas stream can be drawn in and/or removed, wherein the suction jet nozzle comprises a suction section into which, on the one hand, a drive nozzle of the suction jet nozzle and, on the other hand, a gas stream supply open, wherein the suction section has at least two parts, wherein an inner part with respect to a radial direction is formed by an insertion element which has a substantially constant outer cross-section along a flow direction and/or a varying inner cross-section along a flow direction , wherein the insertion element can be inserted into an outer part of the suction section with respect to a radial direction, characterized in that the insertion element can be introduced into the outer part of the suction section counter to the flow direction . wherein the cylinder head cover comprises a nozzle device which is integrated into the separation device and/or into the valve device , wherein the nozzle device comprises a suction jet nozzle by means of which a gas stream can be drawn in and/or removed, wherein the suction jet nozzle comprises a suction section into which, on the one hand, a drive nozzle of the suction jet nozzle and, on the other hand, a gas stream supply open, wherein the suction section has at least two parts, wherein an inner part with respect to a radial direction is formed by an insertion element which has a substantially constant outer cross-section along a flow direction and/or a varying inner cross-section along a flow direction , wherein the insertion element can be inserted into an outer part of the suction section with respect to a radial direction, characterized in that the insertion element can be introduced into the outer part of the suction section counter to the flow direction . <EOS>