US3746901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto generator for ignition systems of internal combustion engines
Assignee: Robert Bosch GmbH
•
Filing: 1972-12-14
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Granted: 1973-07-17
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Expires: 1992-12-14
Abstract
Abstract To provide triggering pulses to trigger a solid-state control ignition system from the same magnetic circuit which also provides power for the ignition spark itself, a control magnet is located within the physical outline of the main magnet which cooperates with the power winding to provide energy for the spark, the control magnet being reversely polarized with respect to the main magnet and having a circumferential extent which is dimensioned with respect to pole shoes of a pulse generator winding, located in magnetic circuit to the control magnet and the main magnet so that, at least once during each revolution of the magneto rotor, the pole shoes of the pulse generator winding are simultaneously located opposite the main magnet and the reversely polarized auxiliary or control magnet. Preferably, the control magnet is located internally of a cup-shaped rotor, and the armature windings are located within the rotor and stationary, on a plate, the control winding being fitted between the pole shoes of the armature and having limited circumferential extent.
Inventors
- 👤 G Haubner
- 👤 W Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:17
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086; F02P7/00; F02P7/06; F02P7/067; F02P7/0675
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
Magneto generator for use with solid-state controlled ignition systems of internal combustion engines, comprising a rotor having located thereon a plurality of equidistantly, circumferentially disposed permanent magnets; at least one stationary armature winding, and a core therefor in magnetic circuit relationship to the permanent magnets of the rotor; a stationary pulse generator winding, adapted for generation of an electrical control pulse to switch over an electronic solidstate switching element of the ignition system; a control magnet located essentially within the physical outline of a main magnet and facing the pulse generator winding; a magnetic circuit on which said pulse generator winding is located and having pole shoes facing the main magnets, the control magnet being reversely polarized with respect to the main magnet and having a circumferential extent which is dimensioned with respect to the pole shoes of the pulse generator winding such that one pulse generator pole shoe will be located opposite the control magnet, while another is located opposite the main magnet adjacent the control magnet at least once during each revolution of the rotor.
Claim 2
Dependent Claim
177 words
Magneto generator for use with solid-state controlled ignition systems of internal combustion engines, comprising a rotor having located thereon a plurality of equidistantly, circumferentially disposed permanent magnets; at least one stationary armature winding, and a core therefor in magnetic circuit relationship to the permanent magnets of the rotor; a stationary pulse generator winding, adapted for generation of an electrical control pulse to switch over an electronic solidstate switching element of the ignition system; a control magnet located essentially within the physical outline of a main magnet and facing the pulse generator winding; a magnetic circuit on which said pulse generator winding is located and having pole shoes facing the main magnets, the control magnet being reversely polarized with respect to the main magnet and having a circumferential extent which is dimensioned with respect to the pole shoes of the pulse generator winding such that one pulse generator pole shoe will be located opposite the control magnet, while another is located opposite the main magnet adjacent the control magnet at least once during each revolution of the rotor.
Claim 3
Dependent Claim
28 words
Magneto according to claim 1, comprising an iron core on which said pulse generator winding is wound, the iron core having terminal portions forming the two pole shoes.
Claim 4
Dependent Claim
35 words
Magneto according to claim 2, wherein the iron core comprises a sleeve-shaped element having flange-shaped ends forming said terminal portions which provide the two pole shoes, the middle sleeve-shaped portion carrying the pulse generator winding.
Claim 5
Dependent Claim
25 words
Magneto according to claim 2, wherein the pole shoes of the pulse generator are axially staggered with respect to the direction of the rotor axis.
Claim 6
Dependent Claim
46 words
Magneto according to claim 1, including a field plate located between the two pole shoes, the pulse generator winding being magnetically coupled to said field plate, the pole shoes being located to be affected by the magnetic field between the control magnet and the main magnet.
Claim 7
Dependent Claim
20 words
Magneto according to claim 1, wherein the pole shoes providing flux to the Stationary pulse generator winding are circumferentially aligned.
Claim 8
Dependent Claim
22 words
Magneto according to claim 1, wherein the pole shoes providing flux to the stationary generator winding are axially aligned and axially spaced.
Claim 9
Dependent Claim
34 words
Magneto according to claim 1, wherein the control magnet and the main magnet are a unitary element, the control magnet forming a zone of magnetization of reverse polarization with respect to the main magnet.
Claim 10
Dependent Claim
43 words
Magneto according to claim 8, wherein the main magnet surface facing the pole shoes associated with the stationary pulse generator winding is formed with facing pole shoes, said facing pole shoes having a gap cut therein in the region of the control magnet.
Claim 11
Dependent Claim
29 words
Magneto according to claim 1, wherein the main magnet is formed with a cut-out portion and the control magnet is accomodated in the cut-out portion of the main magnet.
Claim 12
Dependent Claim
35 words
Magneto according to claim 9, further comprising a control magnet pole shoe located in approximate circumferential alignment with the main magnet pole shoe and spaced from the main magnet pole shoe by an air gap.
Claim 13
Dependent Claim
26 words
Magneto according to claim 1, further comprising pole shoes attached to the main magnet and to the control magnet, respectively, and magnetically separated from each other.
References Cited (Backward Citations)
US3358665A
Cited
US3498281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |