Presented is the detection, isolation, and estimation of faults that occur in the intake air path of internal combustion engines during steady state operation. The proposed diagnostic approach is based on a static air path model, which is adapted online such that the model output matches the measured output during steady state conditions. The resulting changes in the model coefficients create a vector whose magnitude and direction are used for fault detection and isolation. Fault estimation is realized by analyzing the residual between the actual sensor measurement and the output of the original (i.e., healthy) model. To identify the structure of the steady state air path model a process called system probing is developed. The proposed diagnostics algorithm is experimentally validated on the intake air path of a Ford V-8 engine. The specific faults to be identified include two of the most problematic faults that degrade the performance of transient fueling controllers: bias in the mass air flow sensor and a leak in the intake manifold. The selected model inputs include throttle position and engine speed, and the output is the mass air flow sensor measurement.
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January 2007
Technical Papers
Intake Air Path Diagnostics for Internal Combustion Engines
Matthew A. Franchek,
Matthew A. Franchek
Professor and Chair of Mechanical Engineering
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Patrick J. Buehler,
Patrick J. Buehler
School of Mechanical Engineering,
Purdue University
, 1077 Ray W. Herrick Laboratories, West Lafayette, IN 47907
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Imad Makki
Imad Makki
Advanced Powertrain Control Systems,
Ford Motor Company
, FPC-B, MD37, 760 Towncenter Dr., Dearborn, MI 48126
Search for other works by this author on:
Matthew A. Franchek
Professor and Chair of Mechanical Engineering
Patrick J. Buehler
School of Mechanical Engineering,
Purdue University
, 1077 Ray W. Herrick Laboratories, West Lafayette, IN 47907
Imad Makki
Advanced Powertrain Control Systems,
Ford Motor Company
, FPC-B, MD37, 760 Towncenter Dr., Dearborn, MI 48126J. Dyn. Sys., Meas., Control. Jan 2007, 129(1): 32-40 (9 pages)
Published Online: May 29, 2006
Article history
Received:
May 22, 2005
Revised:
May 29, 2006
Citation
Franchek, M. A., Buehler, P. J., and Makki, I. (May 29, 2006). "Intake Air Path Diagnostics for Internal Combustion Engines." ASME. J. Dyn. Sys., Meas., Control. January 2007; 129(1): 32–40. https://doi.org/10.1115/1.2397150
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