Fast Transforms for Rapid Isolation of Misfiring Cylinders

Format:

Conference/Event

Author/Creator:

Rizzoni, Giorgio, author.

Conference Name:

Passenger Car Meeting and Exposition (1987-10-19 : Dearborn, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1987

Summary:

This paper presents a method for the isolation of misfiring cylinders in an internal combustion engine.The method is based on the measurement of the extrema of engine angular velocity. It has been shown that a number of indices can be derived from such a measurement, to provide an indication of engine performance degradation. In this study, an onboard microprocessor-based instrument samples the extrema of the engine velocity waveform in real time, generating an N or 2N vector representing each engine cycle, where N is the number of cylinders.The data is processed by matrix transformations which are designed to isolate specific faults and their intensity. The transforms are constructed in such a way as to yield a nonzero output only when a certain fault is encountered.The system is capable of detecting individual or multiple cylinder misfires, both complete and partial. Experimental verification has been carried out in a passenger vehicle

Notes:

Vendor supplied data

Publisher Number:

871915

Access Restriction:

Restricted for use by site license