PPC operation with low ron gasoline fuel. A study on load range on a euro 6 light duty diesel engine

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Gasoline Partially Premixed Combustion (PPC) is a promising alternative combustion concept that can offer both high indicated efficiency and low exhaust emissions in terms of NOx and soot, compared to conventional diesel combustion (CDC). Previous research has shown that PPC can operate with gasoline-like fuels of varying RON numbers. Some of the most promising results come with the use of gasoline of low octane number, around RON 70. In this study, a commercially available; 2 litre Euro 6 light duty diesel engine is being operated under various load and speed conditions with the use of RON 75 gasoline. The aim is to evaluate the ability of the engine to operate under PPC conditions with the use of as much OEM hardware installed as possible, in this case a double stage turbocharger. High amount of EGR, approximately 30%, is used in order to control NOx production and combustion reaction rates, together with a double injection strategy, which is beneficial at controlling the pressure rise rate and enable high load operation. The engine is operated at three different RPM levels, 1200-1800-2400 and between 2 to 16 bar IMEPg. Results show that combustion instability poses the limit at the low load while low oxygen content restricts the high load operation. Due to the premixed type of combustion, a fast combustion event is possible, giving a higher effective expansion ratio, which improves the indicated efficiency to levels higher than CDC, while indicated emissions are comparable to CDC operation.

Details

Authors
Organisations
External organisations
  • CNR Istituto Motori (IM)
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Vehicle Engineering
  • Energy Engineering

Keywords

  • Gasoline, High efficiency, Light duty engine, Naphtha, Partially premixed combustion, PPCI
Original languageEnglish
Title of host publicationCOMODIA 2017 - 9th International Conference on Modeling and Diagnostics for Advanved Engine Systems
PublisherJapan Society of Mechanical Engineers
Publication statusPublished - 2017
Publication categoryResearch
Peer-reviewedYes
Event9th International Conference on Modeling and Diagnostics for Advanved Engine Systems, COMODIA 2017 - Okayama, Japan
Duration: 2017 Jul 252017 Jul 28

Conference

Conference9th International Conference on Modeling and Diagnostics for Advanved Engine Systems, COMODIA 2017
CountryJapan
CityOkayama
Period2017/07/252017/07/28

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