| aTDC | After Top Dead Center o CA | NREL | National Renewable Energy Laboratory |
| bp | Brake Power kW | SCR | Selective Catalytic Reduction |
| bTDC | Before Dead Center o CA | SOI | Start of Injection |
| CA | Crank Angles o | SME | Soya Methyl Ester |
| CO2 | Carbon Dioxide ppm | ppm | part per million |
| DOC | Diesel Oxidation Catalysts | rpm | revolution per minute |
| EGR | Exhaust Gas Recirculation | HCs | Hydrocarbons |
| EOI | End of Injection | NOx | Nitrogen Oxides |