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. 05, 1990
Filed:
Jul. 20, 1988
Sanden Corporation, Gunma, JP;
Abstract
An automotive air conditioning control system comprises a first control circuit for automatically controlling an angle of an air mix damper in accordance with a plurality of variable conditions, for example, an outside air temperature and an inside air temperature. A switching mechanism predetermines either a maximum heating or cooling when closed. A second control circuit moves the air mix damper to a position for either maximum heating or cooling independently of the variable conditions responsive to operation of the switching mechanism. The second control circuit includes a signaling circuit which outputs a drive signal to control the movement of the air mix damper to the position for maximum heating or cooling for only a predetermined period of time. Therefore, even though the air mix damper or a gear for reducing motor speed becomes locked at the time of maximum heating or cooling and a lock detecting function of a microcomputer of the first control circuit fails to operate, a motor of a motor actuator for moving the air mix damper is saved from destruction.