Performance and emissions of a heavy-duty diesel engine fuelled with diesel and LNG (liquid natural gas)

► The effects of liquid natural gas on a heavy-duty diesel engine were studied. ► Natural gas was used as primary fuel while a pilot amount of diesel was used as an ignition source. ► The maximum portion of natural gas in the dual fuel engine operation was up to 77.90% at 1300 rpm ► The dual fuel operation showed less specific fuel consumption, thermal efficiency, and volumetric efficiency. ► Comparisons of emissions including THC, CO, NOx, and CO2 were reported.