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:
Nov. 23, 1982
Filed:
Jan. 28, 1981
Jurgen Wesemeyer, Nuremberg, DE;
Georg Haubner, Berg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In an ignition system for internal combustion engines, reference mark signals are furnished during the rotation of a shaft of an engine. These signals are also used to compute engine speed. The microcomputer contains a storage (ROM) in which the constants required to approximate one or at the most two characteristic curves of ignition timing advance angle v. engine speed are stored. Interpolation between the one stored curve and a fixed ignition timing angle or by interpolation between the two stored characteristic curves, a family of other characteristic curves can be generated without requiring any further storage locations. The values required for the other characteristic curves are arrived at by interpolation and, preferably, by division or multiplication by factors of 2 which are accomplished by shifting numbers in a register. After the required values have been computed, they are counted down in a counter which, when it reaches a reference value causes the ignition timing signal to be generated.