Oxygen-Enriched Diesel Engine Experiments with a Low-Grade Fuel

Paper #:
  • 932805

Published:
  • 1993-10-01
Citation:
Marr, W., Sekar, R., Cole, R., Marciniak, T. et al., "Oxygen-Enriched Diesel Engine Experiments with a Low-Grade Fuel," SAE Technical Paper 932805, 1993, https://doi.org/10.4271/932805.
Pages:
8
Abstract:
A test series was conducted on a six-cylinder diesel engine to study the impacts of controlled factors (i.e., oxygen content of the combustion air, water content of the fuel, fuel-flow rate, and fuel-injection timing) on engine performance and emissions using Taguchi techniques. Separate experiments were conducted using a commercial-grade No. 2-diesel and a lower-grade No. 6-diesel fuel. This paper reports the test results for No. 6 fuel. Oxygen enrichment improved the combustion process with the lower-grade fuel. There was no observable change in turbocharger performance due to oxygen enrichment.The results showed significant reductions in smoke and particulate emissions, a small increase in thermal efficiency and a large increase in NOx emissions when oxygen-enriched air was used. The effect of water-emulsified fuel on NOx emissions was negligible. When the engine was operated with No. 6 fuel and normal air, the thermal efficiency was lower and the exhaust emissions in general were higher than with No. 2 fuel.
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