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:
Apr. 20, 1993
Filed:
Oct. 24, 1990
Otto Knittel, Soest, DE;
Hella KG Hueck & Co., Lippstadt, DE;
Abstract
In a process and apparatus for controlling an interior temperature of a motor vehicle a nominal temperature is set and is used with a sensed interior space temperature to produce a difference value which is fed to a controller (R). The controller produces a controlling value from the difference value which it feeds to an output stage (E) for cyclically and directionally driving a DC motor (M) which adjusts the position of an adjustable member (SG) to influence an amount of heat fed to an interior space (I) of the motor vehicle. A position signal of the adjustable member is measured and fed in a control loop in order to ensure an exact and dependable positioning of the adjustable member, with the positioning signal being formed by measuring and analyzing partial movements of the DC motor through predetermined angles for activations and further rotation of the DC motor.