Combustion and Emission Characteristics of PCCI Diesel Engine with Low-volatility Fuels 18ICES/086
Authors
Shinji Najima - Yamaguchi University
Masato Mikami - Yamaguchi University
Naoya Kojima - Yamaguchi University
Osamu Moriue - Kyushu University
Tomohiro Kanda - Honda R&D Co., Ltd.
Michikata Kono - The University of Tokyo
Abstract
In PCCI diesel engine, the fuel is injected much earlier than the injection timing of conventional diesel engines. Exhaust-emission improvements are attained by the lean-premixed combustion. It is expected that fuel properties influence mixture formation and combustion characteristics. In this research, experiments were carried out using a single-cylinder PCCI diesel engine operating on pure fuels with different volatilities. The injection timing and overall equivalence ratio of the premixed spray were varied. The results showed that the heat release occurred later in the compression stroke with a lower-volatility fuel. The maximum heat-release rate was smaller for a lower-volatility fuel.