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To improve the vibration and power of the engine, a sensitivity analysis of the operating parameters as well as the eccentricity between crankshaft centre and cylinder centre of the slider-crank-mechanism (SCM) are proposed and researched based on the SCM’s dynamics model and the experimental data of the cylinder pressure in the internal combustion engine. An algorithm program developed in MATLAB environment is then applied to compute the dynamic equations of the SCM. The numerical simulation results show that the eccentricity e, connecting rod length l, and crankshaft radius r are substantially affected the vibration and power of the engine. Particularly, with e= –0.01, the connecting rod length of {1.0-1.2}× l, and crankshaft radius of {1.0-1.2}× r could improve the vibration and increase the engine power.

A sensitivity analysis of SCM dynamic parameters on improving the engine vibration and power