Transient tribodynamic model of piston skirt-liner systems with variable speed effects

A new transient tribodynamic model of the piston skirt-liner system of reciprocating engines is presented in this study. This new model couples the tribological performance of the piston skirt-liner system with the dynamics of the connecting rod, the crankshaft, the flywheel, and the piston. In the model, secondary motion of the piston and transient variable engine speeds are both considered. A case study shows that the transient tribodynamic model is significant in simulating the engine performance under transient conditions. The angular acceleration of the crankshaft is considered, in contrast to models used previously.