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. 05, 1998
Filed:
Nov. 08, 1995
Anton Angermaier, Thann, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for detecting oscillations of a crankshaft of an internal combustion engine includes determining if an engine is within a predetermined rpm range. An amplitude of a crankshaft vibration is ascertained if the engine is within the predetermined rpm range. A determination is made as to whether or not the amplitude is greater than a limit value. A frequency of the crankshaft vibration is ascertained if the amplitude is greater than the limit value. A determination is made as to whether or not the frequency is within a predetermined frequency range. An oscillation of the crankshaft is ascertained and a process for detecting combustion misfires by evaluating fluctuations in the crankshaft speed is suppressed for a predeterminable period of time, if the frequency is within the predetermined frequency range.