Patent Number: 6,309,176

Title: Noise attenuating sound resonator for automotive cooling module shroud

Abstract: A cooling structure 10 for cooling an engine includes an axial flow fan 16 having a plurality of blades 14. A shroud 12 is spaced from and is generally adjacent to the blades 14. A plurality of Helmholtz resonators 24 and 24' is carried by the shroud 12. Each of the resonators 24 and 24' has an opening disposed substantially perpendicular with respect to a direction of air flow resulting from rotation of the fan 16. The resonators 24 and 24' are disposed at locations on the shroud 12 which are generally adjacent to tips 32 of the blades 14. The resonators 24 and 24' are tuned to reduce blade passing tone of the fan 14.

Inventors: Periyathamby; Haran K. (Toronto, CA), Horski; Marek (London, CA)

Assignee: Siemens Automotive Inc.

International Classification: F01P 11/00 (20060101); F01P 11/12 (20060101); F04D 29/66 (20060101); F01P 11/10 (20060101); F01D 005/10 (); F01D 005/16 ()

Expiration Date: 10/30/2018