Development and Evaluation of Tracer Gas Methods for Measuring Trapping Efficiency in 4-Stroke Engines 981382
An investigation into applying a tracer gas method for determining trapping efficiency to 4-stroke engines is carried out. The experimental errors are identified and analyzed. The errors include incomplete cylinder reaction, exhaust instability, and inconsistent exhaust sampling. Tracer gas global kinetic mechanisms are reviewed and used as a means for tracer gas selection. The tracer gases investigated are nitrous oxide (N2O) and monomethylamine (CH3NH2). As a benchmark the oxygen tracer technique is analyzed, where oxygen is used as the tracer. Test results from a GM 5.7 l, 8 cylinder, 4-stroke engine are presented that include measurement of the experimental errors and the trapping efficiency. Of the tracers considered, N2O is determined to be optimal for the engine tested.
Citation: Olsen, D., Puzinauskas, P., and Dautrebande, O., "Development and Evaluation of Tracer Gas Methods for Measuring Trapping Efficiency in 4-Stroke Engines," SAE Technical Paper 981382, 1998, https://doi.org/10.4271/981382. Download Citation
Daniel Olsen, Paulius Puzinauskas, Olivier Dautrebande
International Fuels & Lubricants Meeting & Exposition
SI and Diesel Engine Diagnostics-SP-1369, SAE 1998 Transactions - Journal of Fuels and Lubricants-V107-4