This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Machine Vision System for Quantifying Engine Valve Deposits
Annotation ability available
Sector:
Language:
English
Abstract
Inlet valve deposits in gasoline engines have a significant effect on engine operation with particular reference to cold starting and driveability. Present methods of quantifying these deposits by weighing them or rating them with the aid of a visual rating scale are recognized as not being reliable indices of the detrimental effect of these deposits. A valve deposit quantification system was developed that relied on the use of machine vision. Algorithms were formulated to track the silhouetted edge profile of a backlit valve from which a valve volume was determined. The valve deposit volume was calculated as the difference in volume between the valve in its clean and coked states. The system was able to detect a minimum coke deposit level of 0.06g at the 95% confidence limit, the accuracy being based on the correlation between the volume as determined by the vision system and the mass of the deposit.
Recommended Content
Authors
Citation
Hansen, A., Brooker, A., and Reid, J., "Machine Vision System for Quantifying Engine Valve Deposits," SAE Technical Paper 932807, 1993, https://doi.org/10.4271/932807.Also In
References
- Ray D.B. Such C.H. 1989 Report on the CRC workshop on intake valve deposits Ricardo Test Services Limited Bridge Works Shoreham-by-Sea, West Sussex, England
- Springer K.J. 1990 Gasoline and diesel fuel qualification: a national need Trans. ASME 112 398 407
- Bitting B. Gschwendtner F. Kohlhepp W. Kothe M. Testroet C.J. Ziwica K.H. 1987 Intake valve deposits-fuel detergency requirements revisited SAE Paper 872117
- Reid J. F. Hansen A. C. Goering C. E. 1989 Quantifying diesel injector coking with computer vision Trans. ASAE 32 1503 1506
- Snedecor G.W. Cochran W.G 1989 Statistical Methods Iowa State University Press Ames, Iowa, USA