US3828237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-air ratio controller
Assignee: North American Manufacturing Co
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Filing: 1973-07-11
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Granted: 1974-08-06
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Expires: 1993-07-11
Abstract
Abstract An electronic valve characterizer for fuel-air ratio control wherein the primary valve may be arbitrarily set and the secondary valve or valves are actuated by a slave motor or motors to a predetermined ratio of fuel to air for any setting of the primary valve. The primary and secondary valves are each controlled by motor-actuated valves, each having a slide wire and a slide. The secondary slide is set to operate at a speed in excess of the primary slide. The signal from the primary slide is passed through an amplifier having adjustable rates of amplification in each of a series of adjustable sectors of the movement of the primary slide. The amplified signal is compared with an amplified secondary slide signal and the secondary motor energize to bring the amplified secondary slide signal into general equality with the amplified primary slide signal.
Inventors
- 👤 W Ko
- 👤 J Knodel
- 👤 C Hung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:26
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/02; F; F23; F23N; F23N1/00; F23N1/02; F23N1/022; G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; F23N2235/00; F23N2235/02; F23N2235/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
An apparatus for characterizing primary and secondary valves, each of said valves including an electric motor, a valve armature actuated by said motor and means generating an electric input signal proportional to the position of its respective armature, means for comparing said signals and means powering one of said motors responsive to differences in said signals in a direction to move its armature and bring said signals to equality, the improvement which comprises; first and second separate means for amplifying each of said signals, said first amplifying means having a generally linear amplification cUrve over the range of its input signal, said second amplifying means having presettable means for varying the linearity of its amplification curve at a plurality of points over the range of its input signal.
Claim 2
Independent Claim
128 words
An apparatus for characterizing primary and secondary valves, each of said valves including an electric motor, a valve armature actuated by said motor and means generating an electric input signal proportional to the position of its respective armature, means for comparing said signals and means powering one of said motors responsive to differences in said signals in a direction to move its armature and bring said signals to equality, the improvement which comprises; first and second separate means for amplifying each of said signals, said first amplifying means having a generally linear amplification cUrve over the range of its input signal, said second amplifying means having presettable means for varying the linearity of its amplification curve at a plurality of points over the range of its input signal.
Claim 3
Dependent Claim
43 words
The improvement of claim 1 wherein said second amplifying means has a series of amplification circuits and a plurality of means each sensitive to a different level of the input signal for independently varying the amplification of each circuit at its sensitivity level.
Claim 4
Dependent Claim
107 words
The improvement of claim 1 wherein said second amplifying means includes a plurality of amplifier means for said signal in series each having a predetermined amplification, a plurality of other means each becoming activated at a different input signal level, each of said other means when activated being capable of increasing or decreasing the amplification of one of said amplifier means; and switch means for connecting said other means to one of said plurality of amplifying means whereby the amplification of each of said plurality of amplifying means can be increased or decreased from its predetermined amplification and means for adjusting the amount of increase or decrease.
Claim 5
Dependent Claim
24 words
The improvement of claim 1 wherein said secondary valve armature moves at a rate faster than said primary armature when said motors are energized.
Claim 6
Dependent Claim
108 words
The improvement of claim 1 wherein said second amplifier means comprises a plurality of amplifiers in series; means feeding said input signal to said amplifiers; means feeding said input signal to an intermediate signal buss through a diode; a plurality of potentiometers connected to said buss, each having a slide arm; a diode in series with an arm and a resistor to ground, a second reverse connected diode connected to said first diode; switch means for selectively connecting said second diode to the same input of said amplifier whereby the amplification thereof is increased or to a differential input to said amplifier whereby the amplification thereof is reduced.
Claim 7
Dependent Claim
29 words
The improvement of claim 5 wherein a variable resistor is in series with each output terminal of said switch whereby the amount of increase or decrease can be varied.
Claim 8
Dependent Claim
97 words
The improvement of claim 1 wherein said second amplifying means includes a plurality of amplifiers in series, means feeding one of said signals to a first of said amplifiers, means feeding said one signal to a plurality of adjustable signal dividers whereby to provide a plurality of signals proportional to said one signal, and a plurality of means each responsive to one of said proportional signals when it reaches a predetermined level to feed said signal to one of said plurality of amplifiers whereby to change the amplification of the respective one of said plurality of amplifiers.
Claim 9
Dependent Claim
51 words
The improvement of claim 1 including a plurality of switch means one between each said signal dividers and the respective one of said plurality of amplifiers, said switch means in one position increasing the amplification of its associated amplifier and in the other position decreasing the amplification of its associated amplifier.
Claim 10
Dependent Claim
100 words
The improvement of claim 1 wherein said second amplifying means includes a plurality of IC amplifiers in series, means limiting the amplification of each to a predetermined amount, means feeding said signal to the first of said amplifiers, a plurality of signal dividers in parallel, means changing said signal and feeding it to said signal dividers, including a series diode, a plurality of pairs of reverse polarity diodes in series one between each of said signal dividers and one of said plurality of amplifiers, whereby said divided signal when said series diodes conduct, changes the amplification of its associated amplifier.
Claim 11
Dependent Claim
61 words
An apparatus as defined in claim 1, including a second secondary valve including an electric motor, a valve armature actuated by said motor and means for generating an electric input signal proportional to the position of said valve armature of said second secondary valve, a selector Means for substituting said second secondary valve for said first-mentioned secondary valve in said apparatus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |