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:
Jun. 17, 2003
Filed:
Mar. 05, 2001
Kazuyuki Murakami, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A control unit takes in a set temperature, a vehicle-internal temperature, an ambient temperature, an engine-water temperature, a sun load and a vehicle speed from a means for setting a temperature of the air inside a vehicle and sensors. The control unit determines whether a failure has occurred in the internal-air-temperature sensor and the external air temperature sensor. If a failure is determined in any of the sensors, the control unit fetches a substitute value registered in advance in the substitute-value table. Then, the outlet temperature as well as the difference between the vehicle-internal temperature and the set temperature are determined from the signals generated by the sensors. A driving voltage of the FAN motor and switching position of the outlet flap are subsequently computed. If a failure in either of the internal-air-temperature sensor and the external air temperature sensor is determined, an opening of the air-mix flaps is then set.