ROAD TEST FOR HEAVY DUTY VEHICLES FUELED BY THIRTY PERCENT (B30) PALM BIODIESEL Hari Sumartono, Muhammad Ma^ruf, Rudi Cahyo Nugroho, Nacep Suryana, Ihwan Haryono
Centre of Technology for Thermodynamics, Engines & Propulsion-The Agency for Assessment & Application of Technology) BT2MP-BPPT, Gedung 230 Kawasan Puspiptek Serpong, Banten 15314, Indonesia
Abstract
Roadtest was conducted to confirm that there are no negative effects to the engine due to the utilization of B30 in the long-term operation. The fuel used for the test was made of 70% diesel and 30% B100 with a maximum of 0.5% monoglyceride. The limitation of monoglyceride was made to anticipate the occurrence of precipitation at low temperature and excessive contamination in the fuel filter that can lead to filter blocking. For the first 10000 km, test vehicles were tested every 2500 km interval to evaluate engine power, exhaust opacity, and fuel filter difference pressure. Then the test was conducted every 10000 km until the vehicles reach 40000 km. Filter was changed if pressure difference value indicates the filter blocking about to occur, otherwise it will be changed according to manufacturer standard. The test result shows that after 40000 km, engine power was not decreasing, opacity about the same as at the beginning of the road test. There were test vehicles that had a high rate of pressure difference increase at the beginning of the road test. After the first fuel filter replacement, the rate of pressure difference increase was lower.
