According to the resistance correction method recommended in GB/T 19233-2020 standard,the road load resistance coefficient of light-duty vehicles in plain environment is corrected to the road load resistance coefficient in plateau environment at an altitude of 1 900 m.The vehicle emission and fuel consumption test is conducted under the plain road load resistance and the corrected plateau road load re-sistance.Compared with the plain road load resistance coefficient,the vehicle emission and fuel consump-tion results with the corrected plateau road load resistance have the following main changes:the nitrogen oxide NOx increases by 8.5％,the total hydrocarbon THC decreases by 20.1％,the carbon monoxide CO decreases by 26.6％,the particle number PN decreases by 14.3％,and the fuel consumption decreases by 10.7％.This result shows that the plateau conditions have obvious effects on vehicle emissions and fuel consumption.
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