Patent ID: 7260986

Claim:
A device for determining at least one parameter of an intake air mass for an internal combustion engine, the intake air mass flowing in a line in a main flow direction, comprising: a housing having a measuring channel, wherein the housing is configured to be inserted into the line at a predetermined alignment with respect to the main flow direction, whereby at least a portion of the intake air mass flowing in the line in the main flow direction flows through the at least one measuring channel in a first direction from an intake of the measuring channel to an outlet of the measuring channel; a measuring element situated in the measuring channel for determining the at least one parameter; and a mechanism situated in at least one channel segment located between the intake and the outlet of the measuring channel, wherein the mechanism causes flow vortices in the at least one channel segment; wherein the at least one channel segment is situated, when viewed in the first direction, between the measuring element and the outlet of the measuring channel, and wherein the mechanism causes flow vortices in the at least one channel segment at least in the case of a return flow of the intake air mass flowing from the outlet to the intake of the measuring channel in a second direction counter to the first direction.