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Quantitative Analysis on Altitude Affecting Heavy-Duty Diesel Vehicle Real Driving Emissions Based on Engine-in-the-Loop Methodology
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Quantitative Analysis on Altitude Affecting Heavy-Duty Diesel Vehicle Real Driving Emissions Based on Engine-in-the-Loop Methodology
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Quantitative Analysis on Altitude Affecting Heavy-Duty Diesel Vehicle Real Driving Emissions Based on Engine-in-the-Loop Methodology
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Journal Article
Quantitative Analysis on Altitude Affecting Heavy-Duty Diesel Vehicle Real Driving Emissions Based on Engine-in-the-Loop Methodology
2025
Overview
A dump truck with a maximum designed total mass of 25000 kg was selected to measure the real driving emission characteristics of pollutants and carbon dioxide (CO 2 ) under different altitudes of 0 meters, 800 meters and 1600 meters, with the same simulated road, driver and vehicle model but different vehicle loading of 0% and 40% by using the engine-in-the-loop (EIL) methodology. The results indicate that the EIL methodology can qualitatively and quantitatively analyze the impact of altitude on real driving emissions. The emissions of carbon monoxide (CO) and total hydrocarbons (THC) show a trend of first decreasing and then increasing with increasing altitude, while the emissions of particulate number (PN) show a trend of first sharply increasing and then slightly decreasing with increasing altitude. The variation pattern of nitrogen oxide (NOx) emissions with altitude is not significant. Under different altitude conditions, the specific emissions of CO 2 and THC decrease with increasing vehicle loading, while the specific emissions of PN and CO increase with increasing vehicle loading. However, the variation pattern of NOx emissions with vehicle loading is not obvious. In addition to being strongly correlated with exhaust temperature, the peak value of NOx emissions is highly correlated with road slope and vehicle acceleration. Cold start increases the specific emissions of CO 2 and pollutants, especially for PN and CO.
Publisher
IOP Publishing
