The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2008
Filed:
Feb. 10, 2006
Kazuya Sugiyama, Hiroshima, JP;
Eiji Kosaka, Hiroshima, JP;
Shinichi Ohshima, Hatsukaichi, JP;
Tatsunori Iwasaki, Hiroshima, JP;
Kazuya Sugiyama, Hiroshima, JP;
Eiji Kosaka, Hiroshima, JP;
Shinichi Ohshima, Hatsukaichi, JP;
Tatsunori Iwasaki, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A method for controlling a cooling system for an internal combustion engine having first and second cooling fans is provided, comprising operating the first cooling fan at a first rotational frequency which is greater than a combustion frequency of the internal combustion engine and operating the second cooling fan at a second rotational frequency which is less than the combustive vibration frequency of the internal combustion engine. Since the rotational frequencies of the first and second cooling fans are different from the combustion frequency of the internal combustion engine, the resonance between the rotational vibration of the cooling fans and the combustive vibration of the internal combustion engine may be prevented. Also, since the rotational frequencies of the first and second cooling fans are different from each other so that the resonance between their rotational vibrations may be prevented.