Abstract
The purpose of this paper is to estimate the combustion process in two-stroke slow-speed diesel engines with side fuel injection type for marine use. The rate of heat release data is generally utilized as an indication of diesel combustion process. In the first report, the characteristics of the rate of heat release obtained from the cylinder pressure data in the test engine were discussed. In this paper, the combustion process which can be induced directly from the analyzed data of the rate of heat release curve, were estimated. As a result, it is found that the combustion rate decreases when the fuel spray arrives at a certain circumferential angle, which almost corresponds to the position of the next nozzle. Also, the rate of heat release curve shows double peaks in such case that combustion suspended period due to interference of the combustion gas from the nozzle at upstream side is short and the fuel that should be injected still remains a lot.
