US3553529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser discharge type ignition system with a magneto power supply
Assignee: Robert Bosch GmbH
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Filing: 1968-05-01
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Granted: 1971-01-05
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Expires: 1988-05-01
Abstract
Abstract An ignition arrangement for firing spark plugs in internal combustion engine without the aid of a battery or electrical power supply. The energy required for firing the spark plugs is derived from the rotating crank shaft on the engine to which a permanent magnetic member is coupled. The magnetic member moves within the path of a ferromagnetic core upon which a charging winding and an auxiliary winding are wound. The motion of the permanent magnetic member varies the magnetic flux through the core and thereby induces voltages in the two windings wound upon the core. An ignition capacitor connected to the charging winding and the control electrode of a semiconductor control rectifier is connected to the auxiliary winding. The capacitor is charged from the voltage induced in the charging winding, and is discharged through the primary winding of an ignition transformer. The discharge of the capacitor is controlled by the semiconductor control rectifier, by the voltage applied to its control electrode. The spark plug to be fired is connected across the secondary winding of the ignition transformer, and the firing electrical impulse is induced in the secondary winding upon the discharge of the capacitor through the primary winding.
Inventors
- 👤 Gert Strelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:50
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
290 words
An ignition arrangement for an internal combustion engine comprising, in combination, spark plug means to be fired through an ignition impulse applied thereto; ignition capacitor means for storing the ignition energy for firing said spark plug means; charging coil means having a single core with charging winding wound thereon and connected to said ignition capacitor means for charging the same; magnetic means mechanically coupled to said engine and moved by said engine so that the magnetiC field of said magnetic means links varyingly with said charging coil means and induces thereby a voltage within said charging winding; electronic switching means connected to said ignition capacitor means and having a control electrode for switching on said switching means into the conducting state to discharge said capacitor means, said discharge of said capacitor being inhibited when said electronic switching means is switched off into the nonconducting state by said control electrode; ignition transformer means having primary and secondary windings, said primary winding being connected to said capacitor means for receiving the electrical discharge therefrom and said secondary winding being connected to said spark plug means; and auxiliary winding means wound on said single core and providing an induced voltage opposite in phase to the voltage within said charging winding, said auxiliary winding being connected to the control electrode of said electronic switching means whereby the discharge of said capacitor means through said primary winding when said switching means is switched to the conducting state by said control electrode induces an ignition impulse in said secondary winding for firing said spark plug means, said electronic switching means being switched to said conducting state by said induced voltage from said auxiliary winding means and applied to the control electrode of said electronic switching means.
Claim 2
Dependent Claim
290 words
An ignition arrangement for an internal combustion engine comprising, in combination, spark plug means to be fired through an ignition impulse applied thereto; ignition capacitor means for storing the ignition energy for firing said spark plug means; charging coil means having a single core with charging winding wound thereon and connected to said ignition capacitor means for charging the same; magnetic means mechanically coupled to said engine and moved by said engine so that the magnetiC field of said magnetic means links varyingly with said charging coil means and induces thereby a voltage within said charging winding; electronic switching means connected to said ignition capacitor means and having a control electrode for switching on said switching means into the conducting state to discharge said capacitor means, said discharge of said capacitor being inhibited when said electronic switching means is switched off into the nonconducting state by said control electrode; ignition transformer means having primary and secondary windings, said primary winding being connected to said capacitor means for receiving the electrical discharge therefrom and said secondary winding being connected to said spark plug means; and auxiliary winding means wound on said single core and providing an induced voltage opposite in phase to the voltage within said charging winding, said auxiliary winding being connected to the control electrode of said electronic switching means whereby the discharge of said capacitor means through said primary winding when said switching means is switched to the conducting state by said control electrode induces an ignition impulse in said secondary winding for firing said spark plug means, said electronic switching means being switched to said conducting state by said induced voltage from said auxiliary winding means and applied to the control electrode of said electronic switching means.
Claim 3
Dependent Claim
58 words
The ignition arrangement for an internal combustion engine as defined in claim 1 including connecting means for connecting one terminal of said charging winding to one terminal of said auxiliary winding to form an electrical junction connected to said electronic switching means, said charging winding and said auxiliary winding being wound upon said single core in opposite sense.
Claim 4
Dependent Claim
26 words
The ignition arrangement for an internal combustion engine as defined in claim 2 including rectifier means connected between said charging winding and said ignition capacitor means.
Claim 5
Dependent Claim
30 words
The ignition arrangement for an internal combustion engine as defined in claim 3 including diode means connected between said auxiliary winding and said control electrode of said electronic switching means.
Claim 6
Dependent Claim
40 words
The ignition arrangement for an internal combustion engine as defined in claim 4 including input and output terminal means on said electronic switching means; and resistor means connected in parallel with said control electrode and one of said terminal means.
Claim 7
Dependent Claim
24 words
The ignition arrangement for an internal combustion engine as defined in claim 5 including auxiliary capacitor means connected in parallel with said resistor means.
Claim 8
Dependent Claim
23 words
The ignition arrangement for an internal combustion engine as defined in claim 1 wherein said electronic switching means is a semiconductor controlled rectifier.
Claim 9
Dependent Claim
32 words
The ignition arrangement for an internal combustion combustion engine as defined in claim 1 including mechanical coupling means for coupling said magnetic means to the crank shaft of said internal combustion engine.
Claim 10
Dependent Claim
29 words
The ignition arrangement for an internal combustion engine as defined in claim 8 wherein said magnetic means comprises a permanent magnet rotated by the crank shaft of said engine.
Claim 11
Dependent Claim
47 words
The ignition arrangement for an internal combustion engine as defined in claim 1, wherein said single core has magnetic pole pieces surrounding said magnetic means, so that the reluctance of the magnetic circuit through said charging coil means is varied through the motion of said magnetic means.
References Cited (Backward Citations)
US3240198A
Cited
US3311783A
Cited
US3367314A
Cited
US3398353A
Cited
US3405347A
Cited
US3358665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |