Full Mid-IR Spectral Characterisation of Lubricant in the Ring Pack of a Running Diesel Engine by Time-Resolved FTIR Spectrometry 962003
A unique time-resolved Fourier Transform InfraRed (FTIR) spectrometry technique has been developed to obtain full mid-IR lubricant spectra directly from the ring-pack region of a firing, single cylinder, diesel engine. Initial studies of the detailed spectra show a growth of oxidation products, as indicated by a strong carbonyl absorption peak, observed to increase with load close to the top ring location, for both power and exhaust strokes. Similarly, the formation of alcohol, ketone, aldehyde and carboxylate oxidation products is accessible. Thus it is possible to gauge gross changes to lubricant composition as a function of spatial location through the ring-pack, engine stroke and the severity of engine operation.
Citation: Thompson, D. and Nattrass, S., "Full Mid-IR Spectral Characterisation of Lubricant in the Ring Pack of a Running Diesel Engine by Time-Resolved FTIR Spectrometry," SAE Technical Paper 962003, 1996, https://doi.org/10.4271/962003. Download Citation
D. M. Thompson, S. R. Nattrass
Shell Research Ltd.
1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Modeling and Diagnostics in Diesel Engines-SP-1205, SAE 1996 Transactions - Journal of Fuels and Lubricants-V105-4