Comparative Investigation of Gaseous Emissions and Particle Emission Characteristics from Turbo-Charged Direct Injection (DI) Engine with Gasoline and LPG Fuel Depending on Engine Control Parameters

Seungho Ahn, Jaeho Cho, Sungha Baek, Kangjin Kim, Jinyoung Ko, Cha Lee Myung, Simsoo Park

Research output: Contribution to journalArticle


To meet greenhouse gas (GHG) emission target, automotive manufacturers should promote low carbon emission technology, including gasoline direct injection (GDI) systems. However, recent studies have shown that excessive levels of nanoparticles were emitted from GDI vehicles compared to port fuel injection (PFI) vehicles. One of the many ways to decrease nanoparticle emissions from GDI engine is to use alternative fuel This study used turbo charged 2.0 L 4-cylinder LPG direct injection engine (T-LPDi) that was converted from a turbo charged gasoline direct injection engine (T-GDI) with dedicated LPG fuel supply and control system. To analysis on combustion phenomena and nanoparticle emissions, in-cylinder pressure and exhaust gas were measured under engine dynamometer test. Additionally, various engine control parameters were swung to understand the effects of the control parameters on combustion and nanoparticle characteristics. Throughout this study, T-LPDi engine, compared to T-GDI engine, showed ∼ 9 % and 76 % reduction of CO2 and PN emissions respectively. By optimizing engine parameters based on parametric study, PN emissions were improved 70 % from the baseline of T-LPDi engine emissions.

Original languageEnglish
Pages (from-to)451-457
Number of pages7
JournalInternational Journal of Automotive Technology
Issue number2
Publication statusPublished - 2020 Apr 1



  • Alternative fuel
  • Engine control parameter
  • Engine dynamometer
  • Gaseous emissions
  • Liquified petrolum gas
  • Particulate matter
  • Turbo-charged gasoline direct injection

ASJC Scopus subject areas

  • Automotive Engineering

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