Patent US3828752A successfully refreshed from Google Patents.
US3828752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system for an automotive engine having exhaust recirculation arrangement
Assignee: Nissan Motor Co Ltd
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Filing: 1972-11-28
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Granted: 1974-08-13
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Expires: 1992-11-28
Abstract
Abstract An improved ignition system is herein proposed for use specifically in combination with an automotive engine having an exhaust recirculation system which is adapted to have the exhaust gases recirculated from the engine exhaust system to the engine during predetermined conditions in which toxic nitrogen oxides are produced in the engine in relatively great quantities. the ignition system uses an additional high-tension current generator connected between an ignition power source and an ignition distributor in parallel with a usual high-tension current generator. An electrical circuit arrangement including these two high-tension generators is adapted to fire the air-fuel mixture in the engine with usual energy when the exhaust recirculation system is inoperative and with intensified energy in response to a condition in which the recirculation system is operative.
Inventors
- 👤 K Hioki
- 👤 M Onoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
F; F02; F02D; F02D21/00; F02D21/06; F02D21/08; F02D37/00; F02D37/02; F02P; F02P9/00; F02P9/002; F02M; F02M26/00; F02M2026/001; F02M2026/009
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A combination with an exhaust gas recirculation system for recirculating at least a portion of exhaust gases to an engine for the reduction of the concentration of nitrogen oxides in the exhaust gases, of an ignition system which comprises first hightension current generating means connected between an ignition power source and an ignition distributor, normally open switch means to be closed in response to a condition in which a portion of the exhaust gases is recirculated to the engine through said recirculation system, and second high-tension current generating means connected through said switch means to the ignition power source and connected in parallel with said first high-tension current generating means to the distributor, whereby the ignition distributor is energized from the first high-tension generating means in the absence of a portion of the exhaust gases being recirculated to the engine through said recirculation system and from both the first and second high-tension generating means under said recirculated condition.
Claim 2
Dependent Claim
158 words
A combination with an exhaust gas recirculation system for recirculating at least a portion of exhaust gases to an engine for the reduction of the concentration of nitrogen oxides in the exhaust gases, of an ignition system which comprises first hightension current generating means connected between an ignition power source and an ignition distributor, normally open switch means to be closed in response to a condition in which a portion of the exhaust gases is recirculated to the engine through said recirculation system, and second high-tension current generating means connected through said switch means to the ignition power source and connected in parallel with said first high-tension current generating means to the distributor, whereby the ignition distributor is energized from the first high-tension generating means in the absence of a portion of the exhaust gases being recirculated to the engine through said recirculation system and from both the first and second high-tension generating means under said recirculated condition.
Claim 3
Dependent Claim
21 words
A combination as claimed in claim 1, in which said first and second high-tension current generators have substantially the same capacity.
Claim 4
Dependent Claim
161 words
A combination with an exhaust recirculation system for recirculating at least a portion of exhaust gases to an engine for the reduction of the concentration of nitrogen oxides in the exhaust gases, of an ignition system which comprises two-position selector switch means connected to an ignition power source and responsive to a condition in which a portion of the exhaust gases is recirculated to the engine through said recirculation system, and first and second high-tension current generating means which are connecteD in parallel between said switch means and an ignition distributor, said second high-tension current generating means being greater in capacity than the first high-tension current generator, said switch means being biased to provide connection between said ignition power switch and said distributor and shifted in response to said recirculated condition to a position providing connection between the ignition power source and distributor through said second high-tension current generating means, whereby ignition distributor is energized with intensified energy during said condition.
Claim 5
Dependent Claim
161 words
A combination with an exhaust recirculation system for recirculating at least a portion of exhaust gases to an engine for the reduction of the concentration of nitrogen oxides in the exhaust gases, of an ignition system which comprises two-position selector switch means connected to an ignition power source and responsive to a condition in which a portion of the exhaust gases is recirculated to the engine through said recirculation system, and first and second high-tension current generating means which are connecteD in parallel between said switch means and an ignition distributor, said second high-tension current generating means being greater in capacity than the first high-tension current generator, said switch means being biased to provide connection between said ignition power switch and said distributor and shifted in response to said recirculated condition to a position providing connection between the ignition power source and distributor through said second high-tension current generating means, whereby ignition distributor is energized with intensified energy during said condition.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |