Experimental Studies on Performance Tests for Naturally Aspirated Diesel Engines (Part 1)

—The Effects of Atmospheric Factor and Fuel Temperature on Engine Performance—

Abstract

We studied a test method to minimize the effects of the environmental test conditions on the engine performance and conduct a fairer test. In this report, we investigated the effects of the fuel temperature and the atmospheric factor calculated on the basis of the dry atmospheric pressure and intake air temperature on the engine performance and emission gases in naturally aspirated diesel engines. As a result, it was clarified that differences in the atmospheric factor influence the test results for the engine power, specific fuel consumption, particulate matter, nitrogen oxide and carbon monoxide. There is a possibility of reducing the variations in the test results by maintaining constant atmospheric factors. Therefore, it is necessary to research this possibility.