US3782353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive type ignition arrangement for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1971-09-30
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Granted: 1974-01-01
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Expires: 1991-09-30
Abstract
Abstract Energy from a storage capacitor is transferred to an ignition capacitor when a first switch is made conductive, and the spark is initiated by discharge from the ignition capacitor through the ignition transformer upon closing of a second switch. The current limiting element between the storage capacitor and the ignition capacitor is an inductance.
Inventors
- 👤 H Kammerer
- 👤 H Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/06; F02P3/08; F02P3/0807; F02P3/0838
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
115 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means; ignition capacitor means; first switch means connecting said storage capacitor means to said ignition capacitor means when in a conductive state; first ignition transformer means having a primary winding connected in series to said first switch means and a secondary winding; first spark generating means connected to said secondary winding; second ignition transformer means having a primary winding and a secondary winding; second spark generating means connected to said secondary winding; and second switch means connecting said primary winding of said second transformer means in parallel with said ignition capacitor means when said second switch means is in a conductive state.
Claim 2
Dependent Claim
115 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means; ignition capacitor means; first switch means connecting said storage capacitor means to said ignition capacitor means when in a conductive state; first ignition transformer means having a primary winding connected in series to said first switch means and a secondary winding; first spark generating means connected to said secondary winding; second ignition transformer means having a primary winding and a secondary winding; second spark generating means connected to said secondary winding; and second switch means connecting said primary winding of said second transformer means in parallel with said ignition capacitor means when said second switch means is in a conductive state.
Claim 3
Dependent Claim
83 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means; ignition capacitor means; first switch means connecting said storage capacitor means to said ignition capacitor means when in a conductive state; ignition transformer means having a first primary winding connected in series to said first switch means, a second primary winding, and a secondary winding; and second switch means connecting said second primary winding to said ignition capacitor means when said second switch means is in a conductive state.
Claim 4
Dependent Claim
83 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means; ignition capacitor means; first switch means connecting said storage capacitor means to said ignition capacitor means when in a conductive state; ignition transformer means having a first primary winding connected in series to said first switch means, a second primary winding, and a secondary winding; and second switch means connecting said second primary winding to said ignition capacitor means when said second switch means is in a conductive state.
Claim 5
Dependent Claim
121 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means having a first and second terminal; ignition capacitor means having a first terminal directly connected to said first terminal of said storage capacitor means And a second terminal; first switch means connecting said second terminal of said storage capacitor means to said second terminal of said ignition capacitor means when in a conductive state; inductive impedance means series-connected to said first switch means; ignition transformer means having a primary winding and a secondary winding; spark generating means connected to said secondary winding; and second switch means connecting said primary winding in parallel with said ignition capacitor means when said second switch means is in a conductive state.
Claim 6
Dependent Claim
121 words
In an internal combustion engine, an ignition arrangement, comprising, in combination, storage capacitor means having a first and second terminal; ignition capacitor means having a first terminal directly connected to said first terminal of said storage capacitor means And a second terminal; first switch means connecting said second terminal of said storage capacitor means to said second terminal of said ignition capacitor means when in a conductive state; inductive impedance means series-connected to said first switch means; ignition transformer means having a primary winding and a secondary winding; spark generating means connected to said secondary winding; and second switch means connecting said primary winding in parallel with said ignition capacitor means when said second switch means is in a conductive state.
Claim 7
Dependent Claim
23 words
An arrangement as set forth in claim 3, further comprising means alternatingly switching said first and second switch means to said conductive state.
Claim 8
Dependent Claim
16 words
An arrangement as set forth in claim 3, wherein said second switch means comprise a thyristor.
Claim 9
Dependent Claim
21 words
An arrangement as set forth in claim 5, further comprising diode means connected, with opposing polarity, in parallel with said thyristor.
Claim 10
Dependent Claim
16 words
An arrangement as set forth in claim 3, wherein said first switch means comprise a thyristor.
Claim 11
Dependent Claim
24 words
An arrangement as set forth in claim 3, wherein the capacitance of said storage capacitor substantially exceeds the capacitance of said ignition capacitor means.
Claim 12
Dependent Claim
28 words
An arrangement as set forth in claim 8, wherein the capacitance of said storage capacitor means is more than ten times the capacitance of said ignition capacitor 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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |