An analytical method is presented for simulating piston secondary dynamics and piston-bore contact for an asymmetric half piston model including EHD lubrication at the bore-skirt interface. The Reynolds equation is solved using finite differences and a successive over-relaxation algorithm. The analysis accounts for bore distortion effects due to mechanical and thermal deformation, inertia loading and piston barrelity and ovality. A Newmark-Beta time integration scheme is used combined with a Newton-Raphson linearization. The EHD behavior is coupled with a piston-bore contact algorithm and the piston secondary dynamics. Results demonstrate the importance of coupling among skirt friction, lubrication and secondary motion.

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