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Ducted combustion chamber for direct injection engines and method

United States Patent

March 3, 2015
View the Complete Patent at the US Patent & Trademark Office
An internal combustion engine includes an engine block having a cylinder bore and a cylinder head having a flame deck surface disposed at one end of the cylinder bore. A piston connected to a rotatable crankshaft and configured to reciprocate within the cylinder bore has a piston crown portion facing the flame deck surface such that a combustion chamber is defined within the cylinder bore and between the piston crown and the flame deck surface. A fuel injector having a nozzle tip disposed in fluid communication with the combustion chamber has at least one nozzle opening configured to inject a fuel jet into the combustion chamber along a fuel jet centerline. At least one duct defined in the combustion chamber between the piston crown and the flame deck surface has a generally rectangular cross section and extends in a radial direction relative to the cylinder bore substantially along the fuel jet centerline.
Mueller; Charles (Livermore, CA)
Caterpillar Inc. (Peoria, IL)
13/ 014,154
January 26, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This disclosure was made in part with Government support pursuant to Funds in Agreement #083040921 in cooperation with the United States Government represented by the United States Department of Energy, and with Sandia National Laboratories. The United States Government may have certain rights in this disclosure.