초록 ▼

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 comb

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 (f0) is pulse-duration modulated with a low fundamental-modulation frequency (fm) as well as a control variable.

대표청구항 ▼

In a device for producing a pulsed pulse-duration modulated setting voltage for the operation of a setting drive of a throttle valve of an internal combustion engine, the improvement comprising a pulse-duration modulator and clock means for feeding the modulator for the production of the pulsed sett

In a device for producing a pulsed pulse-duration modulated setting voltage for the operation of a setting drive of a throttle valve of an internal combustion engine, the improvement comprising a pulse-duration modulator and clock means for feeding the modulator for the production of the pulsed setting voltage, by a clock signal of high clock frequency, said modulator having at least one modulation input and means for feeding said modulator with a low modulation frequency signal and a control signal superimposed thereon as additional pulse-duration modulation.