For reducing exhaust emissions, the effect of pilot injection with a short pilot-main interval on combustion was investigated in a turbocharged direct injection diesel engine. Although the amount of pilot injection could be decreased by increasing the Dodge plunger seat diameter, two types of technique for reducing the amount of pilot injection were examined to suppress an increase in smoke due to pilot injection; one is a reduction in the nozzle-hole diameter and the other is an increase in the spring chamber pressure. Each technique was compared from the view points of combustion, smoke density and the trade-off relationship between NOx and fuel consumption. Smoke is reduced as the amount of pilot injection decreases while the trade-off between fuel consumption and NOx is markedly improved by reducing both the nozzle-hole diameter and the amount of pilot injection.
|Number of pages
|Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
|Published - 1997
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering