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:
Aug. 20, 1991
Filed:
May. 23, 1990
Stefan Krebs, Regensburg, DE;
Sebastian Aiglstorfer, Mallersdorf-Pfaffenb, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for controlling knocking in internal combustion engines includes determining a measurement window for each ignition cycle. A sensor signal of a knock sensor is scanned within the measurement window at a predetermined scanning frequency to form scanning values. Digital knock values are determined as the mean value of a given number of the relatively highest scanning values. A knock threshold is formed from a noise value calculated by sliding mean-value formation from a given number of previous knock values. The digital knock values are compared with the knock threshold. The ignition angle is intermittently retarded whenever a knock value exceeds the knock threshold.