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Effect of late inlet valve closing on NG-Diesel RCCI combustion in a heavy duty engine

Zhiqin Jia (Institutionen för tillämpad mekanik, Förbränning) ; Ingemar Denbratt (Institutionen för tillämpad mekanik, Förbränning)
9th International Conference on Modeling and Diagnostics for Advanved Engine Systems, COMODIA 2017, Okayama, Japan, 25-28 July 2017 (2017)
[Konferensbidrag, refereegranskat]

The reactivity controlled compression ignition (RCCI) concept has the potential to make combustion cleaner and more efficient. This paper describes studies on RCCI combustion using natural gas (NG) and diesel as high-octane and high-cetane fuels, respectively. The purpose of this study is to investigate the influence of late inlet valve closing on NG-diesel RCCI combustion. Experimental results reveal that indicated thermal efficiencies over 50% were achieved for most NG-diesel RCCI combustion cases at various inlet valve closing (IVC) timings. RCCI combustion also achieved ultra-low NOx and soot emissions, albeit at the cost of high UHC and CO emissions. Numerical work was also conducted to explore NG-diesel RCCI combustion details.

Nyckelord: Diesel; IVC; Natural gas; RCCI



Denna post skapades 2017-10-04.
CPL Pubid: 252328

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Förbränning (2007-2017)

Ämnesområden

Energiteknik

Chalmers infrastruktur