Abstract:

The effect of lubricating oils on diesel particle emissions was investigated by the experiments in a production engine D19TCI produced by Kunming Yunnei Power mounted on a bench test dynamometer with six different lubricating oils. The effect of evaporation loss rate, lubricant temperature and engine load were
analyzed. The results show that low ash lube causes an outstanding decrease on total particle emissions, oils with low rate of evaporation loss can cut down the lube-level particles (over 300 nm) emission by 56%. Hydrofining oil reduces exhaust particle number concentration more significantly than base oil ⅡCI4 by
8.7% - 20.4%. Synthetic oil PAO has the best particle emission reduction performance at high load. Lube-level particle emissions decline with a lower lubricant temperature at low load, and lube-level particle emissions increase at heavy load while total particle emissions decrease by 57.9%.

Key words: diesel engine, particular emissions, characteristics of lubricants, temperature of lubricant