Impact of CPO and B35 on Diesel Engine Rocker Arm Wear During Long-Term Operation

Fawwaz Aqilah Nurmansyah, Nur Fadhilah Rizky Supramono, Muhammad Ikhsan, Wiliandi Saputro, Erwan Adi Saputro

Abstract


The increasing number of motor vehicles has led to higher fossil fuel consumption, contributing to greenhouse gas emissions, climate change, and environmental degradation. As a renewable alternative, biodiesel offers a way to reduce these impacts. Indonesia, with its abundant natural resources, has significant potential for biodiesel production. Crude palm oil (CPO) is a promising feedstock due to its availability and relatively low environmental impact. However, the high costs associated with the transesterification process make direct use of pre-heated CPO an area worth exploring. This study investigates the impact of pre-heated pure CPO compared to B35 ("Dexlite") on rocker arm wear in a Kubota RD 65 DI-NB diesel engine connected to a Denyo FA-5 alternator. The engine was operated for 300 hours at an average speed of 2000 rpm under a 100% load condition from 4000 watts of halogen lamps. Wear on the rocker arm was evaluated based on dimension loss, mass loss, and visual morphology. The results showed that the CPO-fueled engine exhibited a 38.69% lower wear rate compared to the B35-fueled engine. These findings suggest that pre-heated CPO can reduce component wear, extend engine lifespan, and lower maintenance costs, making it a viable alternative fuel for diesel engines. Further research is recommended to assess its long-term effects on engine performance and efficiency.

Keywords


Biodiesel, CPO, diesel engine, long-term operation, rocker arm, wear.

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