Gas intake device comprising an oriented masking element

Gas inlet device for a cylinder of an internal combustion engine, the gas inlet device comprising an inlet port, at least one inlet valve positioned within the inlet port, at least one calibration of the inlet valve positioned at one end of the inlet port and facing toward the firing face (FF) of the cylinder, means for deflecting the gas to generate an aerodynamic movement of the gas within the cylinder about an axis substantially perpendicular to the axis of the cylinder, at least one mask partially obstructing the end of the inlet port opening into the cylinder, wherein, on the intrados of the inlet port, the intersection between the inlet port and the calibration forms a straight-line segment supported by a rectilinear generatrix (YY) forming an angle α of between 5 and 45° with respect to a plane parallel to the firing face (FF) of the cylinder and passing through a point of intersection between the inlet port and the calibration, characterized in that a midplane (PM10) of the mask forms an angle γ about the axis of the inlet valve with respect to the midplane (PM5) of the inlet port, such that γ=α+/−5°.