US3880133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breakerless ignition system
Assignee: Mahle Electric Drive Systems Co Ltd
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Filing: 1973-04-27
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Granted: 1975-04-29
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Expires: 1993-04-27
Abstract
Abstract A breakerless ignition system for an internal combustion engine, which is of capacitor discharging type comprising a controlled rectifier to control the discharging current of a capacitor to supply firing current through the controlled electrode and cathode of said controlled rectifier for conduction thereof, characterized in that control means is provided which comprises at least two ignition signal sources one of which has a different characteristic of ignition in advanced phase relative to revolution of the engine from that of the other source and transformer means to compound the signal outputs from said ignition signal sources whereby proper advanced ignition phase can be provided to the engine.
Inventors
- 👤 Mitsuo Katsumata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
189 words
A breakerless ignition system for an internal combustion engine, comprising an ignition coil, an ignition plug connected to the secondary side of said ignition coil and received in the cylinder of the engine for igniting a fuel gas therein, a capacitor connected to a primary side of said ignition coil, a power source to charge said capacitor, a controlled rectifier to control the discharge of said capacitor through the primary side of said ignition coil for energization thereof, and ignition control means to supply firing current through the contrOlled electrode and cathode of said controlled rectifier for conduction thereof, characterized in that said ignition control means comprises at least two ignition signal sources one of which has a different characteristic of ignition in advanced phase against revolution of the engine from that of the other signal source and transformer means for compounding the signal outputs of said ignition signal sources and coupling said signal outputs to said controlled electrode, said transformer means having saturable core means for limiting the time width of signals coupled through said transformer means, whereby proper advanced ignition phase can be provided to the engine.
Claim 2
Dependent Claim
189 words
A breakerless ignition system for an internal combustion engine, comprising an ignition coil, an ignition plug connected to the secondary side of said ignition coil and received in the cylinder of the engine for igniting a fuel gas therein, a capacitor connected to a primary side of said ignition coil, a power source to charge said capacitor, a controlled rectifier to control the discharge of said capacitor through the primary side of said ignition coil for energization thereof, and ignition control means to supply firing current through the contrOlled electrode and cathode of said controlled rectifier for conduction thereof, characterized in that said ignition control means comprises at least two ignition signal sources one of which has a different characteristic of ignition in advanced phase against revolution of the engine from that of the other signal source and transformer means for compounding the signal outputs of said ignition signal sources and coupling said signal outputs to said controlled electrode, said transformer means having saturable core means for limiting the time width of signals coupled through said transformer means, whereby proper advanced ignition phase can be provided to the engine.
Claim 3
Dependent Claim
32 words
A breakerless ignition system as set forth in claim 1, characterized in that said ignition control means further comprises a modulator connected in series circuit with one of said ignition signal sources.
Claim 4
Dependent Claim
32 words
A breakerless ignition system as set forth in claim 2, wherein the other of said ignition signal sources controls firing of said controlled rectifier during lower speed of operation of the engine.
Claim 5
Dependent Claim
16 words
A breakerless ignition system as set forth in claim 3, wherein said modulator comprises an inductance.
Claim 6
Dependent Claim
31 words
A breakerless ignition system as set forth in claim 2, wherein one of said ignition signal sources controls firing of said controlled rectifier during higher speed of operation of the engine.
Claim 7
Dependent Claim
17 words
A breakerless ignition system as set forth in claim 5, wherein said modulator comprises a linear resistance.
Claim 8
Dependent Claim
16 words
A breakerless ignition system as set forth in claim 5, wherein said modulator comprises a diode.
Claim 9
Dependent Claim
16 words
A breakerless ignition system as set forth in claim 5, wherein said modulator comprises a capacitance.
Claim 10
Dependent Claim
23 words
A breakerless ignition system as set forth in claim 5, wherein said modulator comprises a diode in series circuit with a Zener diode.
Claim 11
Dependent Claim
30 words
A breakerless ignition system as set forth in claim 1, characterized in that said ignition control means further comprises modulators respectively connected in series circuit with said ignition signal sources.
Claim 12
Dependent Claim
19 words
A breakerless ignition system as set forth in claim 10, wherein one of said modulators comprises a linear resistance.
Claim 13
Dependent Claim
18 words
A breakerless ignition system as set forth in claim 10, wherein one of said modulators comprises a diode.
Claim 14
Dependent Claim
18 words
A breakerless ignition system as set forth in claim 10, wherein one of said modulators comprises a capacitance.
Claim 15
Dependent Claim
17 words
A breakerless ignition system as set forth in claim 13, wherein the other modulator comprises an inductance.
Claim 16
Dependent Claim
25 words
A breakerless ignition system as set forth in claim 11, wherein one of said modulators comprises a diode in series circuit with a Zener diode.
Claim 17
Dependent Claim
68 words
A breakerless ignition system as set forth in claim 1, wherein said transformer means comprises primary winding means and secondary winding means, said primary winding means comprising a tapped winding one end of which is grounded to earth, and one of said signal sources being connected to the non-grounded end of said tapped winding and the other signal source being connected to the tap of said tapped winding.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |