Abstract
As the ownership of hybrid vehicles soars, accurately predicting and assessing CO2 emissions become crucial. This study utilized the AVL portable emission measurement system (PEMS) to reveal the actual CO2 emission of three types of hybrid vehicles. Firstly, engine speed is a key factor influencing CO2 emissions of range-extended electric vehicle (REEV) and plug-in hybrid electric vehicle (PHEV), while vehicle specific power (VSP) affects HEV. Secondly, in terms of fuel consumption, when the battery levels of REEV and PHEV are low, their fuel consumption tends to be higher than that of HEV. Specifically, the CO₂ emission factor (the amount of CO2 emitted by a vehicle per unit distance during operation) ratios of REEV to PHEV range from 1.19 to 1.89, while the ratios of REEV to HEV are between 1.41 and 2.57. Thirdly, in terms of NOX control, HEV performed significantly worse.
Published Version
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