Patent US4192275A successfully refreshed from Google Patents.
US4192275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ignition system
Assignee: Individual
•
Filing: 1976-11-03
•
Granted: 1980-03-11
•
Expires: 1996-11-03
Abstract
Abstract A solid state ignition system operating from a relatively low potential direct current input source for use with an internal combustion engine in which a combustible gaseous mixture is detonated by means of the introduction therein of a spark produced by a relatively high potential, high frequency, constant current pulse generator in response to ignition timing signals associated with the engine, the generator including a relatively high frequency pulse energy oscillator triggered by the ignition timing signals and providing such pulse energy to a circuit producing constant current pulses of such energy over a relatively wide input potential operating range, the high frequency continuous wave pulse energy then being power amplified to operate a solid state switch opening and closing the primary circuit of transformer circuitry coupled to the engine's spark plugs.
Inventors
- 👤 Donald C. Weydemuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:42
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
285 words
An electronic ignition system for use with an internal combustion engine ignition system and a relatively low direct current potential source, said internal combustion engine ignition system providing ignition timing signals, comprising: triggered oscillator means including a relatively high frequency non-inductive free running energy generator for providing pulses of oscillator energy in response to relatively low frequency ignition timing signals; a switch circuit including input terminals coupled between the input of said triggered oscillator means and said ignition timing signals; a time-on limit circuit means coupled between the input of said triggered oscillator means and said ignition timing signals for limiting the on time of said switch circuit, said timing signals being produced by a set of ignition points in series with said potential source, said time-on limit circuit means including a collector/emitter junction of an input switching transistor connected to the input terminals of said switch circuit, said input switching transistor including a base coupled to said timing signals through a series coupling capacitor and having a timing/coupling capacitor discharge resistor for limiting the conducting time of said input switching transistor to a predetermined value greater than the slowest normal operating period of said system; constant-current pulse circuit means responsive to the level of said direct current potential source and coupled to said oscillator means for providing constant current pulses of energy in response to said pulses of oscillator energy over potential levels of said direct current potential source above and below a nominal level; and output circuit means coupled to said constant current pulsed circuit means for providing relatively high-potential, high-frequency, constant-current combustion initiating pulses of output energy in direct relationship to and over the entire frequency range of said ignition timing signals.
Claim 2
Dependent Claim
285 words
An electronic ignition system for use with an internal combustion engine ignition system and a relatively low direct current potential source, said internal combustion engine ignition system providing ignition timing signals, comprising: triggered oscillator means including a relatively high frequency non-inductive free running energy generator for providing pulses of oscillator energy in response to relatively low frequency ignition timing signals; a switch circuit including input terminals coupled between the input of said triggered oscillator means and said ignition timing signals; a time-on limit circuit means coupled between the input of said triggered oscillator means and said ignition timing signals for limiting the on time of said switch circuit, said timing signals being produced by a set of ignition points in series with said potential source, said time-on limit circuit means including a collector/emitter junction of an input switching transistor connected to the input terminals of said switch circuit, said input switching transistor including a base coupled to said timing signals through a series coupling capacitor and having a timing/coupling capacitor discharge resistor for limiting the conducting time of said input switching transistor to a predetermined value greater than the slowest normal operating period of said system; constant-current pulse circuit means responsive to the level of said direct current potential source and coupled to said oscillator means for providing constant current pulses of energy in response to said pulses of oscillator energy over potential levels of said direct current potential source above and below a nominal level; and output circuit means coupled to said constant current pulsed circuit means for providing relatively high-potential, high-frequency, constant-current combustion initiating pulses of output energy in direct relationship to and over the entire frequency range of said ignition timing signals.
Claim 3
Dependent Claim
31 words
The electronic ignition system according to claim 1, wherein said switch circuit comprises a fast rise time switch circuit having a rise and fall time characteristic less than about 0.1 μs.
Claim 4
Dependent Claim
45 words
The electronic ignition system according to claim 1, wherein said time-on limit circuit means also includes diode means connected between said timing/coupling capacitor and said base of said input switching transistor for rapidly discharging any charge on said timing/coupling capacitor once said ignition points close.
Claim 5
Dependent Claim
193 words
An electronic ignition system for use with an internal combustion engine ignition system and a relatively low direct current potential source, said internal combustion engine ignition system providing ignition timing signals, comprising: trigger oscillator means including a relatively high frequency non-inductive free running energy generator for providing pulses of oscillator energy in response to relatively low frequency ignition timing signals; constant-current pulse circuit means responsive to the level of said direct current potential source and coupled to said oscillator means for providing constant-current pulses of energy in response to said pulses of oscillator energy over potential levels of said direct current potential source above and below a nominal level; output circuit means coupled to said constant-current pulsed circuit means for providing relatively high-potential, high-frequency, constant-current combustion-initiating pulses of output energy in direct relationship to and over the entire frequency range of said ignition timing signals; and initial boost circuit means coupled to said output circuit means for storing potential energy prior to introducing a heavy load on said potential source, and supplying energy to said output circuit means at times when the potential of said potential source is reduced under heavy load conditions.
Claim 6
Dependent Claim
193 words
An electronic ignition system for use with an internal combustion engine ignition system and a relatively low direct current potential source, said internal combustion engine ignition system providing ignition timing signals, comprising: trigger oscillator means including a relatively high frequency non-inductive free running energy generator for providing pulses of oscillator energy in response to relatively low frequency ignition timing signals; constant-current pulse circuit means responsive to the level of said direct current potential source and coupled to said oscillator means for providing constant-current pulses of energy in response to said pulses of oscillator energy over potential levels of said direct current potential source above and below a nominal level; output circuit means coupled to said constant-current pulsed circuit means for providing relatively high-potential, high-frequency, constant-current combustion-initiating pulses of output energy in direct relationship to and over the entire frequency range of said ignition timing signals; and initial boost circuit means coupled to said output circuit means for storing potential energy prior to introducing a heavy load on said potential source, and supplying energy to said output circuit means at times when the potential of said potential source is reduced under heavy load conditions.
References Cited (Backward Citations)
US2953719A
Cited
US3032683A
Cited
US2976461A
Cited
US3175123A
Cited
US3331965A
Cited
US3297954A
Cited
US3408536A
Cited
US3443555A
Cited
US3626910A
Cited
US3593696A
Cited
US3545419A
Cited
US3673998A
Cited
US3853106A
Cited
US3745985A
Cited
US3868938A
Cited
US3926557A
Cited
US3897767A
Cited
US3993035A
Cited
US3945362A
Cited
US3875920A
Cited
US3938490A
Cited
US3941108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |