US4191155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine ignition noise preventing device
Assignee: Niterra Co Ltd
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Filing: 1977-11-17
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Granted: 1980-03-04
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Expires: 1997-11-17
Abstract
Abstract An internal combustion engine ignition device comprises a radio noise preventing device for suppressing the capacity discharge current which flows in the low voltage side circuit of an ignition circuit and is generated during the spark discharge of a spark plug in order to prevent the radio noise generated by the ignition system of the internal combustion engine.
Inventors
- 👤 Kanemitsu Nishio
- 👤 Mitsutaka Yoshida
- 👤 Takashi Suzuki
- 👤 Junji Sunohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:11
CPC Classifications
H; H04; H04B; H04B15/00; H04B15/02; H04B15/025; F; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
In an internal combustion engine ignition device, said ignition device being of the type having a low voltage side circuit including a D.C. power source, the primary of an ignition coil and an interrupter means connected in series with said primary and said D.C. power source, and a high voltage side circuit including the secondary of said ignition coil, a spark plug and a radio noise preventing means for suppressing a capacity discharge current in said high voltage side circuit, the improvement comprising: radio noise preventing means in said low voltage side circuit for suppressing a capacity discharge current flowing through said low voltage side circuit, said radio noise preventing means in said low voltage side circuit comprising an inductor connected in series between said primary and said interruptor and a capacitor connected in parallel to the series connection of the inductor and interruptor.
Claim 2
Dependent Claim
144 words
In an internal combustion engine ignition device, said ignition device being of the type having a low voltage side circuit including a D.C. power source, the primary of an ignition coil and an interrupter means connected in series with said primary and said D.C. power source, and a high voltage side circuit including the secondary of said ignition coil, a spark plug and a radio noise preventing means for suppressing a capacity discharge current in said high voltage side circuit, the improvement comprising: radio noise preventing means in said low voltage side circuit for suppressing a capacity discharge current flowing through said low voltage side circuit, said radio noise preventing means in said low voltage side circuit comprising an inductor connected in series between said primary and said interruptor and a capacitor connected in parallel to the series connection of the inductor and interruptor.
Claim 3
Dependent Claim
23 words
An internal combustion engine ignition device as claimed in claim 1, wherein said inductor has an inductance of 0.5 μH to 500 μH.
Claim 4
Dependent Claim
35 words
An internal combustion engine ignition device as claimed in claim 1, wherein said radio noise preventing means provided in said low voltage side further comprises a second capacitor connected in parallel to said D.C. source.
Claim 5
Dependent Claim
23 words
An internal combustion engine ignition device as claimed in claim 3, wherein said second capacitor has a capacitance of 0.1 to 1.0 μF.
Claim 6
Dependent Claim
31 words
An internal combustion engine ignition device as claimed in claim 3, wherein said second and first capacitors have a capacitance of 0.1 to 1.0 μF and 0.001 to 0.2 μF, respectively.
Claim 7
Dependent Claim
22 words
An internal combustion engine ignition device as claimed in claim 1, wherein said capacitor has a capacitance of 0.001 to 0.2 μF.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |