[Study of on-board emission measurement for heavy-duty diesel vehicle and its impact with load].
Real world vehicle emission tests were conducted on two heavy-duty diesel trucks on un-loaded and loaded condition by using a portable emission measurement system. By analysis, the results indicate high fuel consumption and emission rates are concentrated on the high speed and acceleration areas of the speed-acceleration emission maps and the areas are much wider on loaded condition. The impact of load on fuel use and emissions will be highest while the vehicle is cruising or accelerating on (30 +/- 2.5) km x h(-1), which are 1.6 - 3.2 times of those on un-loaded condition. Synthetically, the comprehensive fuel consumption and CO, HC, NO(x) emission factors of truck I and truck II on loaded condition are respectively 1.6, 3.5, 1.1, 1.5 times and 1.2, 1.0, 0.9, 1.5 times of those without load. Load has greatest impact on fuel consumption and NO(x) emission and less effect on HC emission. As for the CO emission, it depends on the maintenance of the truck. It can be figured out from the results on two trucks that the impact of same load will be lower on a vehicle with lager type and more powerful engine, which means if one vehicle is loaded on its acceptable range of GVWR, fuel use and emissions caused by heavy loads could be decreased correspondingly.
Huang
Cheng
C
Shanghai Academy of Environmental Sciences, Shanghai 200233, China. the_light@sohu.com
Chen
Chang-Hong
CH
Jing
Qi-Guo
QG
Pan
Han-Sheng
HS
Wang
Hai-Kun
HK
Li
Li
L
Huang
Hai-Ying
HY
Zhao
Jing
J
Dai
Yi
Y
Wang
Shao-Jun
SJ
Lin
Hong-Yi
HY
Barth
Matthew
M
Nikkila
Richard
R
D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control; D002248:Carbon Monoxide / Q000032:analysis; D004784:Environmental Monitoring; D006838:Hydrocarbons / Q000032:analysis; D018986:Motor Vehicles; D009589:Nitrogen Oxides / Q000032:analysis; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D006838:Hydrocarbons; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D002248:Carbon Monoxide