US4675589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for producing a pulsed setting voltage
Assignee: Mannesmann VDO AG
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Filing: 1985-09-17
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Granted: 1987-06-23
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Expires: 2005-09-17
Abstract
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 0 ) is pulse-duration modulated with a low fundamental-modulation frequency (f m ) as well as a control variable.
Inventors
- 👤 Andreas Sausner
- 👤 Gerhard Ruschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
F; F02; F02D; F02D11/00; F02D11/06; F02D11/10; F02D41/00; F02D41/20; F02D2011/101; F02D2011/102; F02D2041/202; F02D2041/2024; F02D2041/2027
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
In a method of producing a pulsed setting voltage by pulse-duration modulation at a relatively high clock frequency with an electric control signal, thereby to activate a setting drive having an inductance, particularly an electric motor setting drive for a throttle valve of an internal combustion engine, the improvement comprising the steps of pulse-duration modulating the setting voltage at a relatively low modulation frequency; and pulse-duration modulating the setting voltage with a control signal concurrently with said first-mentioned step of pulse-duration modulating.
Claim 2
Dependent Claim
82 words
In a method of producing a pulsed setting voltage by pulse-duration modulation at a relatively high clock frequency with an electric control signal, thereby to activate a setting drive having an inductance, particularly an electric motor setting drive for a throttle valve of an internal combustion engine, the improvement comprising the steps of pulse-duration modulating the setting voltage at a relatively low modulation frequency; and pulse-duration modulating the setting voltage with a control signal concurrently with said first-mentioned step of pulse-duration modulating.
Claim 3
Dependent Claim
35 words
The method according to claim 1, further comprising selecting the high clock frequency to be in the range of 10-20 kHz; and selecting the low modulation frequency to be in the range of 10-100 Hz.
Claim 4
Dependent Claim
37 words
The method according to claim 1, further comprising setting the high clock frequency to be at a value of more than 16 kHz; and setting the low modulation frequency to be in the range of 40-50 Hz.
Claim 5
Dependent Claim
32 words
The method according to claim 1, wherein the high clock frequency is at a value of more than 16 kHz and the low modulation frequency is in the range of 10-100 Hz.
Claim 6
Dependent Claim
86 words
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.
Claim 7
Dependent Claim
86 words
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.
Claim 8
Dependent Claim
30 words
The device according to claim 5, wherein the high clock frequency is in the range of 10-20 kHz and the low modulation frequency is in the range of 10-100 Hz.
Claim 9
Dependent Claim
30 words
The device according to claim 5, wherein the high clock frequency has a value greater than 16 kHz and the low modulation frequency is in the range of 40-50 Hz.
Claim 10
Dependent Claim
22 words
The method according to claim 1, wherein said modulating at said relatively low frequency is accomplished with a substantially sinusoidal waveform signal.
Claim 11
Dependent Claim
18 words
The device according to claim 5, wherein said low modulation frequency signal is a substantially sinusoidal waveform signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |