Patent US20030120341A1 successfully refreshed from Google Patents.
US4016849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for increasing the ignition voltage of internal combustion engines
Assignee: Individual
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Filing: 1975-06-23
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Granted: 1977-04-12
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Expires: 1995-06-23
Abstract
Abstract The present circuit arrangement for generating a high voltage for the spark plugs of an internal combustion engine, includes an ignition coil having a secondary winding coupled to the spark plugs. One end of the primary winding of the coil is connected to one terminal of a battery by a conventional contact breaker. A capacitor and first switch are connected in that order between the other end of the primary winding and the other terminal of the battery. A diode is connected in parallel with the capacitor and first switch. A second switch is connected between the first terminal of the battery and the junction of the capacitor and the second switch. The first switch opens and closes in synchronism with the contact breaker. The second switch is open when the contact breaker is closed, and vice versa. The circuit functions as a voltage doubler whereby the voltage applied to the primary winding is doubled as compared to the battery voltage.
Inventors
- 👤 Peter Pan Lei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:10
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/12; F02P3/00; F02P3/005; F02P9/00; F02P9/002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
164 words
In an apparatus for producing an ignition voltage for an internal combustion engine, including an ignition coil having primary and secondary windings, a battery, and a circuit including ignition switching means connecting said battery to said primary winding, said ignition switching means being connected in series with said primary winding in said circuit; the improvement wherein said circuit further comprises a capacitor, means for connecting said capacitor in series with said battery when said ignition switching means are open, for charging said capacitor, and means for connecting said capacitor in series with said battery, primary winding and ignition switching means when said ignition switching means are closed, whereby the sum of the voltage of said battery and the voltage across the capacitor is applied to said primary winding, resulting in increased current flow in said primary winding and thereby increased storage of magnetic energy in said ignition coil for increasing the voltage storage of said ignition coil when said ignition switching means is opened.
Claim 2
Dependent Claim
164 words
In an apparatus for producing an ignition voltage for an internal combustion engine, including an ignition coil having primary and secondary windings, a battery, and a circuit including ignition switching means connecting said battery to said primary winding, said ignition switching means being connected in series with said primary winding in said circuit; the improvement wherein said circuit further comprises a capacitor, means for connecting said capacitor in series with said battery when said ignition switching means are open, for charging said capacitor, and means for connecting said capacitor in series with said battery, primary winding and ignition switching means when said ignition switching means are closed, whereby the sum of the voltage of said battery and the voltage across the capacitor is applied to said primary winding, resulting in increased current flow in said primary winding and thereby increased storage of magnetic energy in said ignition coil for increasing the voltage storage of said ignition coil when said ignition switching means is opened.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1, wherein said ignition switching means comprise contact-breaker means connected between one end of said primary winding and one terminal of said battery.
Claim 4
Dependent Claim
37 words
The apparatus of claim 1, further comprising a diode connected between one terminal of said battery and said primary winding, whereby said diode is connected in parallel with said capacitor when said ignition switching means are closed.
Claim 5
Dependent Claim
181 words
The apparatus of claim 1, wherein said circuit comprises first switch means (SW3) and second switch means (SW2), said first switch means (SW3) and capacitor (C1) being connected in series between one end of said primary winding and one terminal of said battery, whereby the capacitor is connected to said one end of the primary winding and the first switch means is connected to said one battery terminal, said second switch means being connected between the junction of said capacitor and said first switch means and the other terminal of said battery, means opening and closing said first switch means (SW3) when said contact-breaker means are opened and closed respectively, means opening and closing said second switch means (SW2) when said contact-breaker means are closed and opened respectively, and diode means connected between said one terminal of said battery and said one end of said primary winding and poled to normally conduct current from said battery to said primary winding, whereby said diode means are connected in parallel with said series connection of said capacitor and of said first switch means.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4, wherein said first and second switch means are semi-conductor switches and said diode comprises a semi-conductor diode.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1, further comprising indicator lamp means connected to indicate an operative condition of said connecting means.
Claim 8
Dependent Claim
26 words
The apparatus of claim 1, forming a circuit arrangement connected to the two ends of said primary winding and to the two terminals of said battery.
Claim 9
Dependent Claim
22 words
The apparatus of claim 1, wherein said connecting means comprises a grounded casing having cooling fins, and circuit means within said casing.
Claim 10
Independent Claim
230 words
An apparatus for applying a high voltage to a fuel ignition device, especially for an internal combustion engine, comprising an ignition coil having a high voltage secondary winding adapted to be connected to the fuel ignition device, and a primary winding, ignition switching means synchronized with the internal combustion engine, a battery, said ignition switching means (SW1) being connected between one terminal of the battery and one end of the primary winding and means for interconnecting the other end of the battery with said primary winding, said interconnecting means comprising a capacitor and first switch means (SW3) connected in series in that order between the other end of said primary winding and the other terminal of said battery, second switch means (SW2) connected between the first mentioned terminal of said battery and the junction between said capacitor and first switch means (SW3), and diode means (D1) connected between the other terminal of said battery and the other end of said primary winding, said diode means being poled to conduct current from said battery through said primary winding, and further comprising means for opening and closing said first switch means (SW3) in response to the opened and closed state respectively of said ignition switch means (SW1), and means for opening and closing said second switch means (SW2) in response to the closed and opened states respectively of said ignition switch means.
Claim 11
Independent Claim
230 words
An apparatus for applying a high voltage to a fuel ignition device, especially for an internal combustion engine, comprising an ignition coil having a high voltage secondary winding adapted to be connected to the fuel ignition device, and a primary winding, ignition switching means synchronized with the internal combustion engine, a battery, said ignition switching means (SW1) being connected between one terminal of the battery and one end of the primary winding and means for interconnecting the other end of the battery with said primary winding, said interconnecting means comprising a capacitor and first switch means (SW3) connected in series in that order between the other end of said primary winding and the other terminal of said battery, second switch means (SW2) connected between the first mentioned terminal of said battery and the junction between said capacitor and first switch means (SW3), and diode means (D1) connected between the other terminal of said battery and the other end of said primary winding, said diode means being poled to conduct current from said battery through said primary winding, and further comprising means for opening and closing said first switch means (SW3) in response to the opened and closed state respectively of said ignition switch means (SW1), and means for opening and closing said second switch means (SW2) in response to the closed and opened states respectively of said ignition switch means.
Claim 12
Dependent Claim
15 words
The apparatus of claim 9, wherein said first and second switch means comprise semi-conductor switches.
Claim 13
Dependent Claim
14 words
The apparatus of claim 9, wherein said ignition switch means (SW1) are contact-breaker means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |