Method and system for determining engine cylinder power...

Details Method and system for determining engine cylinder power... Method and system for determining engine cylinder power...

2007-01-16

2007-01-16

Cygan, Michael (Department: 2855)

Measuring and testing

Test stand

For engine

C073S117020, C073S117020, C073S118040

Reexamination Certificate

active

10848310

ABSTRACT:
Individual cylinder output deviations from a normal operating engine cylinder are detected via an analysis of crank shaft speed fluctuations. In the detection phase, the engine is operated at a steady state low idle condition, and engine speed data is collected over a plurality of engine cycles. This data is then averaged, filtered and compared to expected engine speed data. A substantial deviation from the expected speed data in the region of crank shaft angles associated with an individual cylinder during its power stroke adjacent its top dead center position indicates a power level deviation in that cylinder. The magnitude of the power level deviation can then be assessed through a similar procedure where engine speed data is collected, averaged, filtered and compared to expected engine speed data when the engine is operating in a steady state rated condition.

REFERENCES:
patent: 4627275 (1986-12-01), Henein et al.
patent: 5686672 (1997-11-01), Klauber et al.
patent: 5770796 (1998-06-01), Sakamoto et al.
patent: 5878366 (1999-03-01), Schricker et al.
patent: 6067498 (2000-05-01), Akiyama
patent: 6082187 (2000-07-01), Schricker et al.
patent: 6112149 (2000-08-01), Varady et al.
patent: 6199007 (2001-03-01), Zavarehi et al.
patent: 6234010 (2001-05-01), Zavarehi et al.
patent: 6408242 (2002-06-01), Tozzi
patent: 6968268 (2005-11-01), Yamada et al.

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