DEPOSIT FORMING TEST ON SPARK IGNITION ENGINE USING 92 RON GASOLINE BASED ON ASTM D6201 METHOD

• Main Author: Kiranasari, Dianing
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/51229
• Institution: Institut Teknologi Bandung

The quality specifications of gasoline fuel have been regulated in Worldwide Fuel Charter and Guidelines (WWFC) 2019. Three of them are intake valve deposit, combustion chamber deposit and fuel injector cleanliness. A method that can be used to test the intake valve and combustion chamber deposit at once is ASTM D6201 fuel testing method. ASTM D6201 covers specifications of engine operating parameters that must be fulfilled. Therefore, the evaluation of the engine operating parameters carried out as an improvement material for the next test at Petroleum Testing Laboratory of PT Surveyor Indonesia. Although some parameters did not fulfill the specifications, the results of two base fuel tests showed that repeatability and reproducibility parameter had been obtained. Two base fuel tests produced the mass of IVD above WWFC 2019 maximum criteria, so the deposit control additives needed to be added to base fuel. The addition of additives as much as 340 mg/L and 410 mg/L could decrease the amount of IVD significantly. However, the criteria of fuel injector cleanliness and maximum amount of CCD were not achieved in all of the tests. To fulfill the maximum criteria of IVD according to WWFC 2019 which is 50 mg/valve, optimum additive concentrations that must be added to base fuel are determined. Using polynomial regression method on three IVD test results with different concentrations of additive, to achieve the criteria on WWFC, the additive concentrations that should be added is 334 mg/L.