US4122815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-DC ignition system with variable ignition timing
Assignee: Individual
•
Filing: 1977-03-31
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Granted: 1978-10-31
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Expires: 1997-03-31
Abstract
Abstract An ignition system providing variable ignition timing periods to an engine during operative mode of the system includes an angularly modulated waveform generator, an electronic control circuit electrically coupled to the generator, such control circuit being intermittently biased by the generator during the system's operation, and a power source which provides output power whose amplitude varies as a function of time, the power source being electrically connected to the control circuit. An integrator circuit may be interposed between the waveform generator and the electronic control circuit. The generator has a variable capacitor which is driven by the distributor shaft and therefore such generator provides angular modulated wave trains used to intermittently bias the control circuit. The power source is activated by the control circuit to provide non-DC output power to the ignition transformer so as to energize the igniters of the system with high energy alternating power.
Inventors
- 👤 Martin E. Gerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:18
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/01; F02P3/02; F02P3/04; F02P3/05; F02P3/051
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
88 words
A method for fuel ignition in an engine by electrically energizing any of a plural number of igniters therein, comprising in combination the steps of: (a) computing the individual firing period for each of the igniters, one igniter firing period at a time; (b) compensating for the reactive component difference between the output of a non-DC power source and the input of an ignition transformer; and (c) energizing each of the igniters with the non-DC power provided to said transformer during each of their respectively computed firing periods.
Claim 2
Independent Claim
88 words
A method for fuel ignition in an engine by electrically energizing any of a plural number of igniters therein, comprising in combination the steps of: (a) computing the individual firing period for each of the igniters, one igniter firing period at a time; (b) compensating for the reactive component difference between the output of a non-DC power source and the input of an ignition transformer; and (c) energizing each of the igniters with the non-DC power provided to said transformer during each of their respectively computed firing periods.
Claim 3
Dependent Claim
51 words
The method as stated in claim 1, wherein step (a) includes the steps of: intermittently angularly modulating a waveform generator by means integral therewith, said means being driven by the engine; feeding the waveform generator output to an electronic switch; and activating the non-DC power source for each computed firing period.
Claim 4
Dependent Claim
34 words
The method as stated in claim 2, wherein step (b) includes the step of feeding power output from the non-DC power source substantially during each firing period to a capacitor and the ignition transformer.
Claim 5
Dependent Claim
40 words
The method as stated in claim 3, wherein step (c) includes the steps of: distributing the power fed the transformer; and firing said igniters with the distributed power substantially for the duration of each of their respectively computed firing periods.
Claim 6
Dependent Claim
32 words
The method as stated in claim 2, including the step of integrating the output of the waveform generator to form a bias gate having a duration substantially equal to the firing period.
Claim 7
Dependent Claim
30 words
The method as stated in claim 2, wherein the intermittently angularly modulated waveform generator provides a wave train having varying repetition cycles with varying time durations during said repetition cycles.
Claim 8
Dependent Claim
31 words
The method as stated in claim 2, including the step of discriminating against bipolar wavetrain outputs from the waveform generator during step (a) and passing only wavetrains therefrom of predetermined polarity.
Claim 9
Dependent Claim
59 words
The method as stated in claim 1, wherein step (a) includes the steps of: intermittently angularly modulating a waveform generator by means integral therewith, said means being driven by the engine; feeding the waveform generator output to an electronic switch; and activating a non-DC power source concurrently with the steps of intermittently modulating and feeding the waveform generator output.
Claim 10
Dependent Claim
49 words
The method as stated in claim 8, wherein step (b) includes the steps of: feeding the power output from the non-DC power source to a capacitor and an ignition transformer; and by-passing the input of the transformer with the electronic switch during any period intermediate two successive firing periods.
Claim 11
Dependent Claim
50 words
The method as stated in claim 9, wherein step (c) includes the steps of: distributing the power fed the transformer from the non-DC power source during each said firing period; and firing said igniters with the distributed power substantially for the duration of each of their respectively computed firing periods.
Claim 12
Dependent Claim
32 words
The method as stated in claim 8, including the step of integrating the output of the waveform generator to form a bias gate having a duration substantially equal to the firing period.
Claim 13
Dependent Claim
30 words
The method as stated in claim 8, wherein the intermittently angularly modulated waveform generator provides a wave train having varying repetition cycles with varying time durations during said repetition cycles.
Claim 14
Dependent Claim
31 words
The method as stated in claim 8, including the step of discriminating against bipolar wavetrain outputs from the waveform generator during step (a) and passing only wavetrains therefrom of predetermined polarity.
Claim 15
Dependent Claim
46 words
The method as stated in claim 8, wherein step (b) includes the steps of: feeding the power output from the non-DC power source to a capacitor and an ignition transformer; and by-passing the capacitor with the electronic switch during any period intermediate two successive firing periods.
Claim 16
Dependent Claim
50 words
The method as stated in claim 14, wherein step (c) includes the steps of: distributing the power fed the transformer from the non-DC power source during each said firing period; and firing said igniters with the distributed power substantially for the duration of each of their respectively computed firing periods.
Claim 17
Dependent Claim
97 words
An ignition system which during its operative mode provides variable ignition timing periods to an engine, said system utilizing an ignition transformer, comprising the combination: an angularly modulated waveform generator; first means, integral with the waveform generator and driven by the engine during said operative mode, for providing wave trains of varying time durations, which time durations are inversely proportional to the rotational speed of the engine; an electronic control circuit electrically coupled to the generator; a non-DC power source electrically coupled to the transformer; and a capacitor in circuit with the power source and the transformer.
Claim 18
Dependent Claim
97 words
An ignition system which during its operative mode provides variable ignition timing periods to an engine, said system utilizing an ignition transformer, comprising the combination: an angularly modulated waveform generator; first means, integral with the waveform generator and driven by the engine during said operative mode, for providing wave trains of varying time durations, which time durations are inversely proportional to the rotational speed of the engine; an electronic control circuit electrically coupled to the generator; a non-DC power source electrically coupled to the transformer; and a capacitor in circuit with the power source and the transformer.
Claim 19
Dependent Claim
15 words
The system as stated in claim 16, wherein said first means is a variable capacitor.
Claim 20
Dependent Claim
25 words
The system as stated in claim 16, wherein the power source has a direct current input terminal to which the control circuit is electrically connected.
Claim 21
Dependent Claim
23 words
The system as stated in claim 16, wherein the output of the control circuit is electrically connected across the input of the transformer.
Claim 22
Dependent Claim
20 words
The system as stated in claim 16, wherein the output of the control circuit is electrically connected across the capacitor.
Claim 23
Dependent Claim
24 words
The system as stated in claim 16, wherein the control circuit includes an integrator electrically interposed between the generator and the electronic control circuit.
Claim 24
Dependent Claim
51 words
The system as stated in claim 16, including second means electrically interconnected between the generator and the control circuit for converting intermittently angularly modulated wave trains from the generator output into bias gate signal periods, said bias gate signal periods being substantially inversely proportional to the rotational speed of the engine.
Claim 25
Dependent Claim
24 words
The system as stated in claim 16, wherein each of the wave trains provides a plural number of repetition cycles to the control circuit.
Claim 26
Dependent Claim
28 words
The system as stated in claim 16, wherein each of the wave trains provides a plural number of repetition cycles of varying time durations to the control circuit.
Claim 27
Dependent Claim
26 words
The system as stated in claim 21, wherein the integrator discriminates against bipolar output wave trains from the generator, passing only wave trains of predetermined polarity.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |