Method and device for producing a pulsed setting voltage

US4675589A · kind A · utility

Assignee

• VDO Adolf Schindling AG · DE

Inventors

• Andreas Sausner · Frankfurt am Main, DE
• Gerhard Ruschek · Hattersheim, DE

Key dates

• Filing date: Sep 17, 1985
• Grant date: Jun 23, 1987
• Expiry date: Sep 17, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/2027
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.