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:
Jan. 29, 1985
Filed:
Aug. 03, 1983
Applicant:
Inventors:
Immanuel Krauter, Erbstetten, DE;
Hartmut Schweizer, Korntal, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Primary Examiner:
Int. Cl.
CPC ...
F02P / ; F02P / ; F02P / ; F02P / ;
U.S. Cl.
CPC ...
123651 ; 123644 ; 123613 ;
Abstract
An internal combustion engine ignition system includes an output switching transistor (7), the emitter-collector path of which is in series with the primary winding (5) of an ignition coil (6). To attain a constant amount of ignition energy in the ignition coil (6), the control current for the base of the output switching transistor (7) is supplied by a constant-current source (9), the level of the constant control current being selected such that while the ignition energy is being stored in the ignition coil (6), the saturated operation of the output switching transistor (7) is maintained.