The mechanics related with piston-slap induced vibration has been studied in terms of non-dimensionalized dynamic eqation of motion, various non-dimensional parameters such as non-dimensional side-thrust force and non-dimensional impact velocity have been studied throughout the numerical simulations. The results essentially demonstrated the practical way of reducing piston-slap induced vibration by controlling various engine parameters ; piston mass, connecting-rod mass, connecting-rod length, radius of gyration of connecting-rod, etc. Experimetal verification on the suggested prediction method has been also performed by using single cylinder engine which was carefully designed and manufactured to wisely control the engine parameters, especially clearance and the mass of piston. The predicted and experimentally observed vibration signature induced by piston-slap agrees reasonably well and therefore confirms the suggested analysis procedures.
The clearance between piston and cylinder wall can be estimated through the measurement of piston-slap induced vibration signals.