A Variable Compression Ratio Engine

A connecting rod assembly 32 is provided for varying a compression ratio of an internal combustion engine 12 having a crankshaft 36 and a piston 30. The connecting rod assembly 32 includes a first portion 69 adapted to be connected to the crankshaft 36 and having a cylindrical aperture 80, 82, 90, 92. The assembly further includes a second portion 70 adapted to be connected to the piston 30 and movable with respect to the first portion 69 and a locking element 112 having a cylindrical portion 114 that is disposed at least partially in the cylindrical aperture 80, 82, 90, 92. The locking element 112 is movable between an unlocked position and a locked position for locking the second portion 70 at a first position relative to the first portion 69 corresponding to a first compression ratio of the engine.