Patent ID: 9695723
Date: 2017-07-04
CPC Classifications: F01N,F02B,F02M

Claim:
1. A combustion system, comprising: a cylinder with a central axis; a piston crown including a piston crown bowl with a central apex centered on the central axis and a curved base, where the piston crown bowl transitions from the curved base to a top surface of the piston crown through a curved transition having a transition radius, the piston crown bowl, sides of the cylinder, and a top of the cylinder forming a combustion chamber with a volume providing a compression ratio of 15:1; and a central fuel injector that is operable to inject fuel directly into the combustion chamber, the central fuel injector including eight nozzle holes and positioned axially along the central axis and in a cylinder head of the cylinder, where outlets of the eight nozzle holes are symmetrically positioned around the central axis and along an outer circumference of a nozzle of the central fuel injector, each of the outlets having a common radius from the central axis, wherein the nozzle holes are symmetrically positioned around the central axis and along the outer circumference of the nozzle which is dome-shaped, wherein each of the nozzle holes has a K-factor of five, the K-factor defined as a difference between an inlet diameter and an outlet diameter of each of the nozzle holes, divided by a scaling factor of 10 microns, and wherein a tip of the nozzle has a height that is approximately half a diameter of the tip.