Geometrically, the proper term is stadium-shaped. Unlike Honda's oval pistons, which were positioned longitudinally-with their long side parallel to the crankshaft and used two connecting rods per ...

Ferrari has filed a patent for an engine with oval-shaped pistons. The design shortens powertrain length without losing capacity. Honda unsuccessfully tried oval pistons in its racing motorcycles. If ...

The cavities you see here are designed to fit the pistons and connecting rods. Here, the gas ignites and pushes the two components up and down. This causes the connecting rods to spin the ...