Ford Global Technolgoies, LLC

Jeffry Gerard Sczepanski

Jianwen James Yi

Zhiyu Han

Nizar Trigui

A piston for use with a direct injection, spark ignition engine includes a piston body with a top face having a piston deck and a shallow bowl. Furthermore, the shallow bowl has a maximum depth that is in the range of one to five millimeters below the piston deck.

Spark ignition engine with shallow bowl-in-piston geometry

A cylinder bore liner for an internal combustion engine is formed of a sheet of material in the shape of a non-rectangular parallelogram having oblique edges is formed into a cylindrical liner with the abutting edges vertically offset to form a cylinder of smaller diameter than the diameter of a cylinder bore. The liner is then inserted into the cylinder bore of the engine with the leading edge resting on a ledge in the bore, and the trailing edge protruding from the top of the bore. A force is applied to the protruding edge of the liner to force a sliding motion along the oblique abutting edges which necessarily increases the diameter of the liner until a tight fit is achieved.

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Plymouth, MI, United States of America

Jeffry Gerard Sczepanski