US3704700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition arrangement for internal combustion engines having an alternating current generator
Assignee: Robert Bosch GmbH
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Filing: 1971-01-15
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Granted: 1972-12-05
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Expires: 1991-01-15
Abstract
Abstract Shunted across the charging winding of the alternating current generator is an impedance and a spark discharge capacitor connected in series. A thyristor is connected to permit discharge of the capacitor through the primary winding of the spark core when the thyristor is conductive, the control electrode of the latter being connected to the impedance so that the triggering voltage is the voltage drop across the impedance.
Inventors
- 👤 Jurgen Wesemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
150 words
An ignition arrangement adapted to activate at least one spark plug of an internal combustion engine, comprising, in combination ignition capacitor means; A.C. generator means; capacitor current path means connecting said generator means with said capacitor means for supplying alternating current thereto; transformer means having a primary winding and a secondary winding; discharge current path means connecting said capacitor means with said primary winding and including electronic switch means having control electrode means and controlling current flow from said capacitor means through said path means as a function of the voltages at said control electrode means; and impedance means arranged in said capacitor current path means connected in series with said capacitor means and connected with sAid control electrode means, the voltage across said impedance means determining the voltages at said control electrode means, and thereby determining the current flow from said capacitor means through said discharge current path means.
Claim 2
Dependent Claim
150 words
An ignition arrangement adapted to activate at least one spark plug of an internal combustion engine, comprising, in combination ignition capacitor means; A.C. generator means; capacitor current path means connecting said generator means with said capacitor means for supplying alternating current thereto; transformer means having a primary winding and a secondary winding; discharge current path means connecting said capacitor means with said primary winding and including electronic switch means having control electrode means and controlling current flow from said capacitor means through said path means as a function of the voltages at said control electrode means; and impedance means arranged in said capacitor current path means connected in series with said capacitor means and connected with sAid control electrode means, the voltage across said impedance means determining the voltages at said control electrode means, and thereby determining the current flow from said capacitor means through said discharge current path means.
Claim 3
Dependent Claim
38 words
An arrangement as defined in claim 1, wherein said A.C. generator means produces current flow through said capacitor means in one direction and alternately in opposite direction, thereby alternately increasing and decreasing the voltage across said capacitor means.
Claim 4
Dependent Claim
70 words
An arrangement as defined in claim 1, wherein said A.C. generator means produces current flow through said capacitor means and impedance means in one direction, producing across said impedance means a voltage drop preventing current flow through said switch means, and alternately produces current flow through said capacitor means and impedance means in opposite direction, producing across said impedance means a voltage drop permitting current flow through said switch means.
Claim 5
Dependent Claim
13 words
An arrangement as defined in claim 1, said switch means comprising thyristor means.
Claim 6
Dependent Claim
25 words
An arrangement as defined in claim 3, said switch means comprising thyristor means having a gate and a cathode together constituting said control electrode means.
Claim 7
Dependent Claim
92 words
An arrangement as defined in claim 1, wherein said generator means produces during each voltage-cycle out-of-phase first and second voltage drops across said capacitor means and said impedance means, respectively, and wherein said first voltage drop varies between minimum and maximum values, and wherein said second voltage drop varies between values respectively permitting and preventing current flow through said switch means, and further wherein said second voltage drop reaches a value permitting current flow through said switch means a fraction of a voltage-cycle after said first voltage drop reaches said maximum value.
Claim 8
Dependent Claim
86 words
An arrangement as defined in claim 1, said capacitor means, impedance means, primary winding, secondary winding and generator means each having two terminals, and wherein said switch means comprises a thyristor having an anode, a cathode and a gate, and wherein said impedance means has one terminal connected with one terminal of said generator means and with said gate and another terminal connected with one terminal of said capacitor means and with said cathode, and wherein said primary winding has one terminal connected to said anode.
Claim 9
Dependent Claim
43 words
An arrangement as defined in claim 7, wherein the other terminal of said capacitor means is connected to the other terminal of said generator means, to the other terminal of said primary winding, to one terminal of said secondary winding, and to ground.
Claim 10
Dependent Claim
16 words
An arrangement as defined in claim 1, wherein said impedance means has a voltage-dependent resistive component.
Claim 11
Dependent Claim
31 words
An ignition arrangement as defined in claim 1, wherein said generator means includes a charging winding, said series connected capacitor and impedance means being connected in parallel with said generator means.
Claim 12
Dependent Claim
26 words
An ignition arrangement as defined in claim 1, wherein said capacitor, means electronic switch means and impedance means compose a replaceable subunit of the ignition arrangement.
Claim 13
Dependent Claim
14 words
An ignition arrangement as defined in claim 1, wherein said impedance means is adjustable.
Claim 14
Dependent Claim
18 words
An ignition arrangement as defined in claim 1, wherein said impedance means includes inductively and capacitively reactive components.
Claim 15
Dependent Claim
17 words
An ignition arrangement as defined in claim 1, wherein said impedance means includes an inductively reactive component.
Claim 16
Dependent Claim
17 words
An ignition arrangement as defined in claim 1, wherein said impedance means includes a capacitively reactive component.
Claim 17
Dependent Claim
17 words
An ignition arrangement as defined in claim 1, wherein said impedance means is at least predominantly resistive.
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |