Ford Global Technolgoies, LLC

Merck Patent Gmbh

Philip Baker

Ian Charles Sage

Paul Turner

Rachel Tuffin

Allan Brignall

Owain Llyr Paari

Carl Brown

A cylinder head for an internal combustion engine includes a helical inlet port with a sharp edge swirl lip on a generally cylindrical valve stem recess. The helical inlet port has an inlet passage, a bowl-shaped chamber which has a rim that terminates in an annular valve seat and which encompasses an annular space about a generally cylindrical valve stem guide for a poppet valve stem. One surface of the bowl meets one wall of the inlet passage along a swirl edge, which has a radius of less than about 0.5 mm, and preferably a sharp edge with a radius of less than about 0.1 mm. Such swirl edges may be formed by casting the inlet port with excess material, which is then machined away only within the bowl along a cylindrical cutting line.

Inlet port with sharp edge swirl lip

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London, United Kingdom

Philip Baker