定置型ディーゼル機関のNOxデータへ応用するための補正要素の研究

抄録

This paper describes the influence of the correction factors on the engine NOx discharge level as well as the NOx data fluctuation for engines with 165 mm-to-320 mm in bore. The weighting coefficients of the correction factors are derived for leveling NOx data by means of the least-squares-method based on the calculation step assuming that NOx level is primarily a function of absolute humidity, cylinder inlet air temperature, and diesel engine fuel oil specific gravity instead of the cetane index having a good correlation with the ignition quality. Effects of the correction coefficients are explained in terms of the leveling of NOx data and the prediction of NOx discharge from the stationary diesel engine. The results indicate that NOx emission increases with a decrease in absolute humidity, the increase of the cylinder inlet air temperature and the specific gravity of the diesel fuel oil. Additionally, a chart for estimating the effect of the NOx correction factors and predicting the NOx emissions is introduced.