Patent ID: 8141538

Claim:
An intake ducting device for a car engine comprising: at least a round sheet main body having on its outer edge a circular ring, said circular ring is fixed in an inner surface of a car intake tube and is provided inside of it with a plurality of airflow disturbing holes, said airflow disturbing holes are arrayed at least in two layers from an inner side to a center of said circular ring and are in form of grids, each of said airflow disturbing holes has at least an airflow deflector having a tilting angle relative to an axis of said intake tube, when airflow from said car intake tube passes said main body, by function of said airflow disturbing holes and said airflow deflectors respectively in said airflow disturbing holes, said airflow is separated against concentration, thereby said car intake tube takes in air uniformly; wherein said airflow disturbing holes are arrayed inside said circular ring and are arrayed circularly at least in two layers from said inner side to said center of said circular ring; wherein a part of said airflow deflectors of said airflow disturbing holes tilt toward a direction, other part of said airflow deflectors tilt toward a contrary direction; and wherein amount of part of said airflow disturbing holes arrayed at least in two layers which are nearer to said center of said circular ring is less than amount of other part of said airflow disturbing holes farther away from said center of said circular ring.