Parametric Study to Optimize Gasoline Compression Ignition Operation Under Medium-Load Condition Using CFD Saudi Aramco

Format:

Book

Conference/Event

Author/Creator:

Badra, Jihad, author.

Contributor:

Alhussaini, Alma

Amer, Amer

Sim, Jaeheon

Viollet, Yoann

Conference Name:

SAE WCX Digital Summit (2021-04-13 : Live Online, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

The effects of intake pressure (Pin), start of injection (SOI), injection pressure (Pinj), injection split ratio (Qsplit), internal and external exhaust gas recirculation (EGR) rates were varied to optimize a number of key parameters at a partially premixed combustion medium-load/low speed condition using CFD. These include indicated specific fuel consumption (ISFC), combustion phasing (CA50), maximum rate of pressure rise (MRPR), maximum cylinder pressure (Pmax), indicated specific NOx (sNOx), indicated specific hydrocarbons (sHC), indicated specific carbon monoxide (sCO) and Filter Smoke Number (FSN) emissions. Medium-load point (6bar indicated mean effective pressure (IMEP), 1500 revolutions per minute (RPM)) was selected where Pin varied between 1.25 and 1.5bar, SOI between -100 and -10 crank angle degree (CAD) after top dead center (aTDC), Pinj between 100 and 200bar, split ratio between 0 and 0.5, EGR between 0 and 45% and internal EGR measured by rebreathing valve height was varied between 0 and 4.5mm. The study concluded that both internal and external exhaust gas recirculation along with moderate intake pressure and relatively early SOIs (-70 to -40 CAD aTDC) were necessary to realize acceptable combustion performance while meeting the emissions targets at this speed/load point

Notes:

Vendor supplied data

Publisher Number:

2021-01-0440

Access Restriction:

Restricted for use by site license