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. 04, 2006
Filed:
Feb. 11, 2004
Alain Rossignol, Toulouse, FR;
Alain Rossignol, Toulouse, FR;
Siemens VDO Automotive, Toulouse Cedex 1, FR;
Abstract
A method for detecting combustion failure in an internal combustion engine, by calculating an index ln(t) representing engine irregularities at a moment (t) during certain combustion phases in one cylinder; calculating an observation function G(t), which is a function between index ln(t) and an estimated reference value In+/−i(t) at a different moment during engine operation comparing G(t) to a threshold (S), which is a function of engine load (C) and/or rpm (N); and diagnosing a combustion failure when G(t) exceeds (S) or: G(t)=In(t)−ln(t), wherein In(t) is a function of ln(t) and In+/−i(t) represents the index ln(t) after weighting of the values of said index outside an acceptable predefined differential.