Comparative study on economic performance and emission characteristics of CHINA 6 LNG and diesel heavy-duty trucks
YANG Baohua
LI Yuan
FANG Yanlin
WU Haoming
LIU Shucheng
Abstract：To study the economic efficiency and actual emission characteristics of CHINA 6 heavy-duty trucks in different fuel countries,liquefied natural gas(LNG)heavy-duty trucks and diesel heavy-duty trucks,which have the highest proportion of domestic heavy-duty trucks,are selected as the research objects.The purchase,use,and maintenance costs of the two types of heavy-duty trucks are thoroughly investigated,and the economic efficiency of the two types of heavy-duty trucks is compared and analyzed.Actual road emission tests on 40 newly produced and in use LNG and diesel heavy-duty trucks are conducted,and original emission tests on 4 typical LNG and diesel engines are carried on.The actual road emissions and engine original emissions of the two heavy-duty trucks are analyzed.The results indicate that,with an annual operating mileage of 200 000 km,the comprehensive economic benefits of LNG heavy-duty trucks in the first year are 122 800 yuan higher than those of diesel heavy-duty trucks.The actual road NOx emissions of newly produced LNG heavy-duty trucks are lower than those of diesel heavy-duty trucks,but the actual road NOx emissions of LNG heavy-duty trucks are higher than those of diesel heavy-duty trucks.The actual road CO emissions of LNG heavy-duty trucks are always higher than those of diesel heavy-duty trucks.The original emissions of NOx,THC,and CO from LNG engines are significantly higher than those from diesel engines,especially the CO emissions are much higher than those from diesel engines.
Keywords：LNG heavy-duty truckdiesel heavy-duty truckeconomic analysisNOx emissionCO emission
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 86-90,96 )