Patent US4493306A successfully refreshed from Google Patents.
US4493306A
Expired / Lapsed
US
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Enhanced spark energy distributorless ignition system (B)
Assignee: Ford Motor Co
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Filing: 1984-02-23
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Granted: 1985-01-15
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Expires: 2004-02-23
Abstract
Abstract A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.
Inventors
- 👤 Joseph R. Asik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:02
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/03; F02P7/035; F02P3/00; F02P3/02; F02P3/04; F02P3/05; F02P3/051; F02P9/00; F02P9/002; F02P9/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
310 words
A distributorless ignition system with increased spark energy including: a first ignition coil having a first primary winding and a first secondary winding; a second ignition coil having a second primary winding and a second secondary winding; a first ignition module coupled to said first primary winding; a second ignition module coupled to said second primary winding; a supplementary spark energy module coupled to said first and second secondary windings; a first series combination of a first diode and a first spark plug connected to said first secondary winding; a second series combination of a second diode and a second spark plug connected in parallel with said first series combination, said second diode being connected in opposite polarity to said first diode; a third series combination of a third diode and a third spark plug connected to said second secondary winding; a fourth series combination of a fourth diode and a fourth spark plug connected in parallel with said third series combination, said fourth diode being connected in opposite polarity to said third diode; and said supplementary spark module including: a diode bridge having two parallel paths each of two diodes in series; a module coil coupled to points between the diodes in each of the parallel paths; a resistor coupled in parallel with said two parallel paths; a capacitor coupled in parallel to said two parallel paths; a first pair of transistors coupled in parallel to said capacitor; a second pair of transistors coupled in parallel to said capacitor; said first and second pair of transistors each including the series connection of two collector-emitter paths of two transistors, one on either side of a first midpoint in said first pair and a second midpoint in said second pair; said first midpoint being coupled to said first secondary winding; and said second midpoint being coupled to said second secondary winding.
Claim 2
Dependent Claim
310 words
A distributorless ignition system with increased spark energy including: a first ignition coil having a first primary winding and a first secondary winding; a second ignition coil having a second primary winding and a second secondary winding; a first ignition module coupled to said first primary winding; a second ignition module coupled to said second primary winding; a supplementary spark energy module coupled to said first and second secondary windings; a first series combination of a first diode and a first spark plug connected to said first secondary winding; a second series combination of a second diode and a second spark plug connected in parallel with said first series combination, said second diode being connected in opposite polarity to said first diode; a third series combination of a third diode and a third spark plug connected to said second secondary winding; a fourth series combination of a fourth diode and a fourth spark plug connected in parallel with said third series combination, said fourth diode being connected in opposite polarity to said third diode; and said supplementary spark module including: a diode bridge having two parallel paths each of two diodes in series; a module coil coupled to points between the diodes in each of the parallel paths; a resistor coupled in parallel with said two parallel paths; a capacitor coupled in parallel to said two parallel paths; a first pair of transistors coupled in parallel to said capacitor; a second pair of transistors coupled in parallel to said capacitor; said first and second pair of transistors each including the series connection of two collector-emitter paths of two transistors, one on either side of a first midpoint in said first pair and a second midpoint in said second pair; said first midpoint being coupled to said first secondary winding; and said second midpoint being coupled to said second secondary winding.
Claim 3
Dependent Claim
64 words
A distributorless ignition system as recited in claim 1 wherein; the base connection of one transistor in each of said first and second pairs is coupled to be triggered in conjunction with said first ignition module; and the base connection of another one transistor in each of said first and second pairs is coupled to be triggered in conjunction with said second ignition module.
References Cited (Backward Citations)
GB682460A
Cited
FR1008198A
Cited
US3910247A
Cited
US4136301A
Cited
US4301782A
Cited
US4407259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |