US3704701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition arrangements for internal combustion engines
Assignee: Individual
•
Filing: 1970-12-21
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Granted: 1972-12-05
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Expires: 1990-12-21
Abstract
Abstract The alternating current from the engine magneto charges the ignition capacitor on one half-wave and triggers the thyristor to discharge the capacitor on the next half-wave. The discharge current induces in the secondary of the spark coil a high voltage pulse that causes the spark plug to arc.
Inventors
- 👤 Gunter Struber
- 👤 Peter Schmaldienst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:21
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
An ignition arrangement for an internal combustion engine including, in combination, a charge winding; a magneto magnetically coupled to said charge winding to induce therein an alternating voltage when the engine is running; ignition capacitor means; first circuit means connecting said charge winding to said capacitor means for charging the same during one polarity of said induced voltage; second circuit means connected in a series loop circuit comprising; at least a part of said charge winding, a rectifying means, and including resistor means for generating a signal thereacross during the other polarity of said induced voltage; and switch means for discharging said capacitor means in response to generation of said signal having a pair of electrodes connected directly across said resistor.
Claim 2
Dependent Claim
121 words
An ignition arrangement for an internal combustion engine including, in combination, a charge winding; a magneto magnetically coupled to said charge winding to induce therein an alternating voltage when the engine is running; ignition capacitor means; first circuit means connecting said charge winding to said capacitor means for charging the same during one polarity of said induced voltage; second circuit means connected in a series loop circuit comprising; at least a part of said charge winding, a rectifying means, and including resistor means for generating a signal thereacross during the other polarity of said induced voltage; and switch means for discharging said capacitor means in response to generation of said signal having a pair of electrodes connected directly across said resistor.
Claim 3
Dependent Claim
88 words
An ignition arrangement as defined in claim 1, wherein said charge winding has first and second ends, and said first circuit means includes an other rectifying means connected between said first end and said capacitor means and arranged to conduct current from said charge winding to said capacitor means; said switch means comprises a thyristor, and said electrodes are the control and cathode electrodes of the said thyristor, the anode electrode of said thyristor being connected to a point between said other rectifying means and said capacitor means.
Claim 4
Dependent Claim
95 words
An ignition arrangement as defined in claim 2, wherein the first mentioned rectifying means comprises a diode connected between said cathode electrode and a point on said charge coil intermediate said first and second ends and arranged to conduct current from said cathode electrode to said point; and wherein said resistor means is connected between said cathode electrode and said second end of said charge winding, whereby said second circuit means is prevented from conducting current during said one polarity but only during said other polarity to thereby develop said signal across said resistor means.
Claim 5
Dependent Claim
82 words
An ignition arrangement as defined in claim 3, wherein said ignition arrangement has at least one spark plug, and further comprising spark coil means having primary and secondary windings, said primary winding being connected to said capacitor means and to said cathode electrode to permit discharge of saiD capacitor means when the anode-cathode path of said thyristor is made conductive, and said secondary winding being connected to at least one spark plug to spark the latter when said capacitor means is discharged.
Claim 6
Dependent Claim
33 words
An ignition arrangement as defined in claim 3, further comprising at least one diode connecting said control electrode to a point connecting said second end of said charge winding and said resistor means.
Claim 7
Dependent Claim
30 words
An ignition arrangement as defined in claim 2, wherein the first mentioned rectifying means comprises a diode connected between said cathode electrode and said first end of said charge winding.
Claim 8
Dependent Claim
19 words
An ignition arrangement as defined in claim 3, wherein said charge winding has a tap at said intermediate point.
Claim 9
Dependent Claim
21 words
An ignition arrangement as defined in claim 74, wherein said primary winding and said electronic switch means are connected in series.
Claim 10
Dependent Claim
41 words
An ignition arrangement as defined in claim 4, wherein said capacitor means is connected in series with said primary winding of the spark coil and said thyristor is connected in parallel with the series connected ignition capacitor means and primary winding.
Claim 11
Dependent Claim
36 words
An ignition arrangement as defined in claim 9, further including diode means shunted across said thyristor, the polarity of said diode means being such that the latter is non-conductive when said electronic switch means is conductive.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |