Patent ID: 8327822
Filing Date: 2012-12-11
Classification: F02B,Y02T

Abstract:
1. A diesel engine comprising: a group injection hole nozzle including a plurality of injection holes; a piston having a top surface; and a step provided on the top surface, wherein the height of the step increases in an outward direction along a diameter of the piston, wherein the plurality of injection holes include a plurality of sets of injection holes such that each set of injection holes has an opening angle, which is the angle between the center axes of the injection holes within the set, wherein the group injection hole nozzle has a first compound spraying angle, which is the angle between the middle of the opening angle of a first set of group injection holes and the middle of the opening angle of a second set of group injection holes located on an opposite side of the group injection hole nozzle, wherein the group injection hole nozzle has a second compound spraying angle, which is the angle between the middle of the opening angle of a third set of group injection holes and the middle of the opening angle of a fourth set of group injection holes located on an opposite side of the group injection hole nozzle, and wherein the first compound spraying angle is different than the second compound spraying angle.