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:
Jan. 17, 2006
Filed:
Jul. 08, 2004
Shinichi Oda, Okazaki, JP;
Kuzuhiro Takeuchi, Okazaki, JP;
Tatsuhiro Matsuki, Obu, JP;
Takaaki Muramatsu, Hamamatsu, JP;
Shinichi Oda, Okazaki, JP;
Kuzuhiro Takeuchi, Okazaki, JP;
Tatsuhiro Matsuki, Obu, JP;
Takaaki Muramatsu, Hamamatsu, JP;
DENSO Corporation, Kariya, JP;
Asmo Co., Ltd., Kosai, JP;
Abstract
An electric fan system has a first electric blowerwhich utilizes a brushless motor, and a second electric blower, which utilizes a brushed motor, for distributing the cooling air to the radiator and the condenser. The system has an electronic engine control unit which activates only the first electric blower when it determines that the cooling water temperature is less than Tand activates both the first and second electric blowers when it determines that the cooling water temperature is Tor higher. The water temperature is based on a detection output from a cooling water temperature sensor. Thus, since the electric blower is not activated unless the cooling water temperature becomes Tor higher, use of the brushed motor is limited and its life is increased.