The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1982
Filed:
May. 20, 1981
Josef Orova, Schwabach, DE;
Jiri Podrapsky, Buchschwabach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
On-off oscillations immediately following the initiation of the spark in a magneto ignition system are prevented by a timing circuit the capacitor of which is charged continually even during the spark time and whose discharge time constant exceeds 10 .mu.s. The capacitor is discharged through the emitter-base circuit of a control transistor and keeps the control transistor in a saturated state throughout the desired spark duration. While the control transistor is in the saturated state, it shortcircuits the emitter-base circuit of the ignition transistor, thereby blocking the ignition transistor continuously. Since the capacitor of the timing circuit is continually charged, the actual spark duration greatly exceeds the 10 .mu.s time constant of the timing circuit and may be as high as 1.2 ms.