US 12,110,851 B2
Fuel injector in an engine having spray orifice set configured for offset positioning and engine operating method
Bobby John, Peoria, IL (US); and Jonathan W. Anders, Peoria, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Dec. 15, 2022, as Appl. No. 18/082,101.
Prior Publication US 2024/0200520 A1, Jun. 20, 2024
Int. Cl. F02M 43/04 (2006.01); F02M 51/06 (2006.01)
CPC F02M 43/04 (2013.01) [F02M 51/06 (2013.01); F02M 2200/46 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An engine comprising:
an engine housing having a cylinder formed therein;
a piston movable in the cylinder and including a combustion bowl, and an annular rim extending circumferentially around the combustion bowl and defining a piston center axis;
a fuel injector tip including a first orifice set having a plurality of orifices arranged in a first targeting pattern within the cylinder and distributed around a first tip axis, and a second orifice set having a plurality of orifices arranged in a second targeting pattern and distributed around a second tip axis;
the second tip axis is offset from the piston center axis, such that a plurality of orifice-rim distances are defined, in a projection plane normal to the piston center axis, between the plurality of orifices in the second orifice set and the annular rim; and
the plurality of orifices in the second orifice set having a range of orifice sizes that is varied in direct relation to the respective orifice-rim distances.