| FUEL ECONOMY IMPROVEMENT ANALYSIS OF HYBRID ELECTRIC VEHICLE |
| InChun Chung, Hyehyun Kang, Jinil Park, Jonghwa Lee |
| Ajou University |
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| ABSTRACT |
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Owing to stricter environmental regulations and greenhouse gas reduction targets, hybrid electric vehicles
(HEVs) have marked a remarkable increase in market share to replace internal combustion engine vehicles (ICEVs). Among
HEVs, powersplit HEVs have attracted increasingly higher interest, and lead the trend of the HEV market. Although many
studies have attempted to improve the fuel efficiency of powersplit HEVs, only a few studies have focused on the effect of
vehicle system on fuel efficiency. Thus, this study compared the performance of a powersplit HEV and an ICEV by measuring
and analyzing the improvement of fuel efficiency for each influencing factor. The energy flow in the main system components
of a powersplit HEV, such as engine, motor, drivetrain, and wheel, was modeled, and four driving modes of ICEV and
powersplit HEV were tested by using a chassis dynamometer. Finally, the improvement in fuel efficiency of a powersplit HEV
was determined for each component and was quantified to allow comparative evaluation against that of an ICEV. |
| Key Words:
Hybrid Electric Vehicle (HEV), Fuel economy, Energy flow, Vehicle energy management |
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Corresponding Author.
Jinil Park , Email. 
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