Study of the Relationship between the Level of Lubricating Oil Contamination with Distillation Fuel and the Risk of Explosion in the Crankcase of a Marine Trunk Type Engine

Fuel contamination of engine lubricating oil has been previously determined to arise from two independent phenomena: the effect on flash point, and changing lubrication conditions tribological pairs. This paper combines these effects holistically analyzes consequences fuel in a trunk piston risk crankcase explosion. The author hypothesized that diesel as an contaminant increases explosion due interaction factors: (1) changes oil’s combustible properties, (2) deterioration engine’s nodes, such main bearings, pins, or crank bearings. An experiment was performed evaluate rheological, ignition, properties oils (SAE 30 SAE 40) commonly used for recirculation marine engines different levels contamination. hypothesis partially confirmed, results show with amount no more than 10% does not significantly affect crankcase. However, concentrations above call corrective action because viscosity index, lubricity, coefficient friction film resistance change significantly. Deterioration seen viscosity, lubricity oil, causes increase bearing temperature possibility hot spots leading