Phase Diagrams of Different Modes of Misfire Calculated from the Digital Fourier Transformation of Angular Crankshaft Velocity Delphi Corporation

Format:

Conference/Event

Author/Creator:

Malaczynski, Malaczynski, author.

Contributor:

Van der Poel, Robert

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Certain harmonics of angular crankshaft velocity are indicative of engine imbalance induced by cylinder misfire. Application of the Digital Fourier Transformation (DFT) facilitates the production-feasible calculation of a singular index in the frequency domain indicative either of smooth engine operation or misfire. The phase of that particular index with proper interpretation directly points to a misfiring cylinder. The identification of a misfiring pair, either opposing or a non-opposing in the cylinder bank, requires a bit more sophisticated approach since the phase response of the characteristic index in the frequency domain becomes more complex. The method demonstrated here was successfully applied in real time in four-, six-, and eight-cylinder engines, both SI and Diesel, for the On-Board Diagnostic application with reliability exceeding relevant regulatory requirements

Notes:

Vendor supplied data

Publisher Number:

2010-01-0167

Access Restriction:

Restricted for use by site license