Patent ID: 8555854
Filing Date: 2013-10-15
Classification: F02B,Y02T

Abstract:
1. A piston for a direct injection engine, the piston comprising a bowl at an upper end, the bowl forming a portion of a combustion chamber, wherein the bowl has a centerline and an inner surface and a dome that defines a bowl volume configured to receive a fuel-air mixture, the dome having a surface that includes at least one separation feature having a separation edge on said dome surface arranged to deflect sprayed fuel to the inner surface of the bowl, where said separation feature is formed as a step in the surface of the dome, the step disposed around the centerline; wherein the dome further includes at least one additional feature, wherein the at least one additional feature projects from said dome surface; and wherein the additional feature defines a surface disposed at an angle of 45-89° from said centerline of said piston bowl which deflects sprayed fuel upwards towards the inner surface of the bowl.