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Effect of Active Eco-Mode on Reduction of On-Road CO2 Emissions in Light-Duty Gasoline Vehicle

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Abstract

To suppress CO2 emissions through policies and technology development, eco-driving techniques are required to be actively practiced as an effective method to improve fuel efficiency. Among the methods to practice eco-driving, the active eco-mode is a function that changes the driving mode of a vehicle by the driver’s choice. This study aims to analyze the effect of driving modes (normal-mode, eco-mode) on CO2 emissions through on-road tests under different driving conditions. The eco-mode activation under normal temperature conditions emitted relatively less CO2 emissions than the normal-mode driving. Under high-temperature conditions, fuel economy deteriorated since an additional load was required for heating, ventilating, and air conditioning (HVAC) system operation. However, when using the eco-mode, the control of the HVAC system was integrated with the effect of powertrain logic, which achieved a higher reduction rate of CO2 emissions than the normal temperature condition. In particular, the impact of reducing fuel consumption was confirmed in the urban section with many stops and departures, which is determined to result from a combination of gear shifting and acceleration pedal filtering strategies. Meanwhile, the eco-mode logic has not been applied much in rural and motorway sections.

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Abbreviations

BEVs:

battery electric vehicles

CO2 :

carbon dioxide

EC:

european commission

ECU:

engine control unit

EFM:

exhaust flow meter

EU:

European union

EUDC:

extra urban driving cycle

HVAC:

heating, ventilating and air conditioning

MPA:

mean positive acceleration

NEDC:

new european driving cycle

NOX :

nitrogen oxides

OBD:

on-board diagnostics

OBFCM:

on-board fuel consumption meter

PEMS:

portable emissions measurement systems

RDE:

real driving emission

RPA:

relative positive acceleration

WLTC:

world-harmonized light-duty test cycle

i:

sample index for each speed bin

j:

sample index with positive acceleration

k:

section index

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Acknowledgement

The authors would like to express our gratitude to Dr. Youngbok Lee, Dr. Insuk Ko, Dr. Gyujin Kim, and other colleagues at Seoul National University, Korea, for their help with on-road tests. This research was supported by the Seoul National University Institute of Advanced Machines and Design (SNU IAMD), and was conducted through a project organized by the Ministry of Environment of Korea.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Korea

    Seungil Lee, Yongjoo Lee, Joohan Kim, Namho Kim, Cha-Lee Myung & Kyoungdoug Min

  2. Department of Mechanical Engineering, Gachon University, Gyeonggi, 13120, Korea

    Hoimyung Choi

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  1. Seungil Lee
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  2. Yongjoo Lee
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Correspondence to Kyoungdoug Min.

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Lee, S., Lee, Y., Kim, J. et al. Effect of Active Eco-Mode on Reduction of On-Road CO2 Emissions in Light-Duty Gasoline Vehicle. Int.J Automot. Technol. 24, 1423–1439 (2023). https://doi.org/10.1007/s12239-023-0115-5

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