Experimental and Simulation Analysis of 1.3 Litre Water Cooled Engine Lubrication Circuit

To meet stringent reduction in exhaust emission and improving internal combustion engine fuel efficiency, have forced the designer to optimize auxiliary systems like lubrication and cooling. This paper describes the experimental and simulation verification of a 1.3 litre water cooled engine lubrication system. The lubrication circuit model is built in Ricardo Ignite software. The simulation model preparation steps using 3D-CAD model is explained in paper. Engine main bearing and connecting big-end bearing leakage maps are evaluated using Ricardo Valdyn software which is capable of simulation engine crank-train multi body dynamics along with bearing oil behavior. The pressure and flow distribution at various locations are predicted using simulation model. These simulation predictions are experimentally verified. It is observed acceptable correlation between simulation and experimental values. The same calibrated model is used for a case study where engine main oil gallery pressure for lower speed range is improved. Various options are studied for avoiding major modification in lubrication circuit mode. It is found that pipe attaching main oil gallery and gear-train uses benzo. The optimum benzo internal diameter is optimized and observed ~ 0.5 bar main oil gallery pressure improvement in low speed rages. The simulation model is verified experimentally and observed promising correlation. The intention of this work is to check feasibility of this technique for establishing good confidence and expertise in lubrication system developments.