US 12,146,452 B1
Piston and engine system using same
Aaron Ness, Battle Ground, IN (US); Andrew J. Loetz, West Lafayette, IN (US); Adam J. Clute, Lafayette, IN (US); and Sri Harsha Uddanda, Cypress, TX (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jul. 13, 2023, as Appl. No. 18/352,020.
Int. Cl. F02F 3/26 (2006.01); F02F 3/00 (2006.01)
CPC F02F 3/26 (2013.01) [F02F 3/0015 (2013.01)] 19 Claims
OG exemplary drawing
 
10. A piston for an internal combustion engine comprising:
a crown piece including a first axial end having a combustion face, a second axial end having an oil gallery surface, and an outer crown surface extending between the first axial end and the second axial end and having a plurality of ring grooves formed therein;
the combustion face forming a piston rim extending circumferentially around a piston center axis, a combustion bowl having a bowl outer wall, a bowl floor, and a bowl edge defining an intersection of the piston rim and the combustion bowl;
the piston defining a bowl opening dimension at a first axial location of the bowl edge, and a bowl max dimension at a second axial location of the bowl outer wall;
the piston rim defining a rim plane normal to the center axis at the first axial location;
the bowl opening dimension is defined at a radially innermost location of the bowl edge; and
a ratio of the bowl max dimension to the bowl opening dimension is from about 1.10 to about 1.15;
wherein a clearance distance coincident with the piston center axis is defined between the second axial location and the bowl floor such that the bowl floor is spaced axially below the second axial location.