Air intakes 1 Biofuels 1 Blending 1 Combustion characteristics 1 Compression ratio (machinery) 1 Computer software 1 Diesel engines 1 Direct injection 1 Direct injection diesel engines 1 Energy conservation 1 Environmental technology 1 Ethanol 1 Flammability 1 High temperature and pressure 1 Injection compression 1 Injection durations 1 Injection parameters 1 Intake temperature Palm oil 1 Palm oil methyl esters 1 Speed 1 Temperature 1