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. 23, 1987
Filed:
Sep. 17, 1985
Andreas Sausner, Frankfurt am Main, DE;
Gerhard Ruschek, Hattersheim, DE;
VDO Adolf Schindling AG, Frankfurt am Main, DE;
Abstract
In a method for producing a pulsed setting voltage (v). said voltage is pulse-duration modulated with an electric control variable. The setting voltage serves to act on a setting drive having an inductance, particularly an electric motor setting drive (9) of a throttle valve (11) of an internal combustion engine. In order to obtain at the same time good periodic excitation of the setting drive as well as a low electric loss power in the setting drive, the setting voltage which is pulsed with a high clock frequency (f.sub.0) is pulse-duration modulated with a low fundamental-modulation frequency (f.sub.m) as well as a control variable.