A Novel Integrated Series Hybrid Electric Vehicle Model Reveals Possibilities for Reducing Fuel Consumption and Improving Exhaust Gas Purification Performance

Takehiro Yamagishi*, Hajime Shingyouchi, Kyohei Yamaguchi, Norifumi Mizushima, Takahiro Noyori, Jin Kusaka, Toshinori Okajima, Ratnak Sok, Makoto Nagata

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper describes the development of an integrated simulation model for evaluating the effects of electrically heating the three-way catalyst (TWC) in a series hybrid electric vehicle (s-HEV) on fuel economy and exhaust gas purification performance. Engine and TWC models were developed in GT-Power to predict exhaust emissions during transient operation. These models were validated against data from vehicle tests using a chassis dynamometer and integrated into an s-HEV model built in MATLAB/Simulink. The s-HEV model accurately reproduced the performance characteristics of the vehicle's engine, motor, generator, and battery during WLTC mode operation. It can thus be used to predict the fuel consumption, emissions, and performance of individual powertrain components. The engine combustion characteristics were reproduced with reasonable accuracy for the first 50 combustion cycles, representing the cold-start condition of the driving mode. Analysis of the TWC performance using the model showed that early activation of catalyst heating during the cold-start significantly improved exhaust gas purification performance but also increased vehicle fuel consumption by 2.66% over the entire driving cycle. However, the fuel consumption penalty could be reduced to 1.1 % without increasing emissions by modifying the engine's cold-start control strategy.

Original languageEnglish
JournalSAE Technical Papers
Issue number2021
DOIs
Publication statusPublished - 2021 Sep 21
EventSAE 2021 Powertrains, Fuels and Lubricants Digital Summit, FFL 2021 - Virtual, Online, United States
Duration: 2021 Sep 282021 Sep 30

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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