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:
May. 13, 1986
Filed:
Oct. 19, 1984
Yasuhiko Suzuki, Nagoya, JP;
Hideaki Ito, Aichi, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi, JP;
Abstract
An automobile fan controller comprises: a fluctuation signal generator for generating a fluctuation signal; a pulse-width-modulation circuit including a triangle generator for generating a triangle-waveform signal having a constant amplitude and a constant period, and a comparator connected to the fluctuation signal generator and the triangle generator, for comparing the fluctuation signal with the triangle-waveform signal, thereby producing a pulse signal having a pulse width variable dependent on the fluctuation signal; and a driver circuit, including a switching power transistor connected to the pulse-width-modulation circuit, a fan motor mounted on an automobile, and an air flow switching unit mounted on the automobile for energizing and de-energizing said fan motor with a variable pulse width in response to the pulse signal. In this fan controller air flow delivered from an automobile fan driven by the fan motor can fluctuate at a fluctuation amplitude in response to an air flow range set by an automobile driver by connecting the automobile fan controller to the fan motor.