Research on Emissions of Heavy Duty Vehicles with Different Loads under Low Load Cycles
This study conducts experimental research on the emission characteristics of carbon monoxide(CO),nitrogen oxides(NOx),and particulate matter quantity above 10nm(PN10)of heavy-duty vehicles withr different loads under low load cycle(LLC).The results were obtained:under LLC operating conditions,the to-tal emissions of CO increase with the increase of load,but the emissions per unit power is opposite.The emis-sions of NOx decreases with increasing loads under LLC operating conditions.Both PN10 and PN23 increase with increasing load,and the larger the load,the higher the proportion of particles with a size of 10-23nm.