Abstract: A direct injection engine includes a fuel injector receiving a flow of pressurized fuel. The fuel injector provides fuel injections directly into a combustion chamber of the engine. The fuel injector includes a first fuel injector nozzle opening directing with a first narrow injection angle a first portion of a fuel injection mass at a spark gap of a spark plug. The fuel injector further includes a second fuel injector nozzle opening dispersing with a second wider injection angle a second portion of the fuel injection mass within the combustion chamber.

Abstract: A piston for an internal combustion engine is located within a cylinder of the engine. The piston includes a dish-shaped depression in a surface of the piston exposed to a combustion chamber of the cylinder providing a recess from a nominal top of the piston. The depression includes a depression boundary located at the nominal top of the piston and proximate to an outer diameter of the piston, an apex, and inclined walls connecting the apex to the depression boundary.

Abstract: A direct injection engine includes a fuel injector receiving a flow of pressurized fuel. The fuel injector provides fuel injections directly into a combustion chamber of the engine. The fuel injector includes a first fuel injector nozzle opening directing with a first narrow injection angle a first portion of a fuel injection mass at a spark gap of a spark plug. The fuel injector further includes a second fuel injector nozzle opening dispersing with a second wider injection angle a second portion of the fuel injection mass within the combustion chamber.

Abstract: A cylinder head assembly for a direct-injection engine is provided. The cylinder head assembly includes a cylinder head at least partially defining a combustion chamber. The cylinder head is sufficiently configured to receive a fuel injector operable to inject fuel directly into the combustion chamber in a spray pattern. An ignition source, such as a spark plug, is spaced from the fuel injector and operable to initiate ignition of the fuel. A fuel mixture diffuser tab is mounted with respect to the cylinder head and extends into the combustion chamber. The fuel mixture diffuser tab is positioned between the fuel injector and the ignition source and is operable to direct a portion of the fuel toward the ignition source. An internal combustion incorporating the disclosed cylinder head assembly is also provided.