ANALISIS PERFORMA KONVERSI MESIN DIESEL MENJADI MESIN BERBAHAN BAKAR GANDA CNG-DIESEL PADA TRUK BERAT DENGAN SISTEM INJEKSI BAHAN BAKAR COMMON RAIL

• Main Author: Hanif Munandar, Revaldi
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/68023
• Institution: Institut Teknologi Bandung

Heavy duty truck with diesel engine is currently the type of vehicle that is frequently used for good transportation in Indonesia. However, the diesel engine that uses the oil-based fossil fuel produces a considerable amount of emission. The conversion from diesel engine into dual fuel engine with the fuel of compressed natural gas (CNG) and diesel fuel can be a solution to the emission problem of diesel engine. By substituting a high amount of diesel fuel into CNG the emission can be decreased while maintaining the performance. In order to understand the effect of conversion in heavy duty truck application, an actual heavy-duty truck need to be done. The testing is already done with UD QUERTZ GW 330 as test object. The testing is done to know if the conversion into dual diesel fuel engine causes an improvement or deterioration of performance. From the testing and analysis that is done it can be seen that the conversion can causes an increase of performance in terms of fuel consumption and power-torque. In terms of emission there is an increase of CO and HC emission and decrease of CO2 and Soot emission. The problem of conversion of the diesel engine into dual diesel fuel engine is mainly caused by the incomplete combustion of the engine. The incomplete combustion in the dual diesel fuel engine is cause by the unadjusted injection timing. The injection timing of the dual diesel fuel engine needed to be earlier in order to achieve a more complete combustion. The use of compressed natural gas fuel that has a high research octane number causes a longer ignition delay compare to regular diesel engine operation.