Diesel Emissions as Related to Engine Variables and Fuel Characteristics

Equations for predicting the cetane number of diesel fuels from their physical properties

Reduction of Emissions from Diesel Engines

The Effects of Diesel Fuel Properties on Performance, Smoke, and Emissions

This paper describes the results of a public opinion survey on testing of diesel exhaust odors conducted during 1969 and 1970. Major goals of the research were to relate public opinion of the odors and the objectionability associated with them to odor intensity, and to obtain a dose-response curve as the primary result. It was found that a relationship existed between perceived diesel exhaust odor intensity and the objectionability of these odors. The nature of this relationship was that increasingly intense diesel exhaust odors were considered increasingly objectionable.

Public Opinion of Diesel Odor

Raw oils generated by low-temperature coal pyrolysis were chemically characterized and subjected to tests in three diesel engines of different configuration. The coal liquids were tested as blends with conventional No. 2 diesel fuels, the coal liquids being 20-25% by volume. These tests were performed in support of a broader set of studies on the feasibility of using low-temperature pyrolysis to obtain liquid fuel materials from coal that do not require extensive, costly upgrading. Determination of physical and chemical properties of the pyrolysis liquids indicated a higher hydrogen/carbon ratio and lower aromaticity than typical SCR II and EDS middle distillates. Combustion tests were performed in both direct- and indirect-injection engines at three sites. The results were highly variable, the addition of the oil showing no effect on emissions and performance in some cases, reduced emissions on one engine, and increased emissions in other cases. The results are discussed with reference to prior related work.

Diesel Emissions as Related to Engine Variables and Fuel Characteristics

Citations

Equations for predicting the cetane number of diesel fuels from their physical properties

Reduction of Emissions from Diesel Engines

The Effects of Diesel Fuel Properties on Performance, Smoke, and Emissions

Public Opinion of Diesel Odor

Screening tests of coal pyrolysis liquids as diesel fuel extenders

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