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:
Jul. 15, 1980
Filed:
Dec. 29, 1977
Jurgen Fresow, Schwieberdingen, DE;
Bert Wurst, Moglingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The ignition coil of the system has its primary serially connected with a transistor which controls current flow therethrough. Ignition pulses are provided by an ignition pulse source, for example an inductive transducer. The recurrence rate of the ignition pulses is analyzed and a corresponding control signal is obtained which controls the timing interval of a timing circuit, the timing circuit determining the ON, or connected time, of the transistor or similar controlled switch in series with the primary of the ignition coil. Analysis of the recurrence rate is, simply, done in a pair of integrators, alternately effective and storing the time interval between alternate, succeeding ignition pulses, which permits control of current flow through the ignition coil for a period of time just sufficient for current flow to reach saturation without, however, causing current flow while the circuit is saturated, thus preventing unnecessary heating of the ignition coil and associated components. Alternate integration of alternate signals permits efficient operation also under high-speed operating conditions.