US 11,815,055 B1
Multi-fuel injector and method
Dana R. Coldren, Secor, IL (US); Lifeng Wang, Dunlap, IL (US); and Eric L. Schroeder, Germantown Hills, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Dec. 1, 2022, as Appl. No. 18/060,931.
Int. Cl. F02M 43/04 (2006.01); F02M 51/06 (2006.01); F02M 55/00 (2006.01); F02M 47/04 (2006.01)
CPC F02M 43/04 (2013.01) [F02M 47/046 (2013.01); F02M 51/06 (2013.01); F02M 55/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fuel injector capable of injecting a plurality of different fuels in a single fuel injection event, the fuel injector comprising:
a body including a primary fuel path and a pilot fuel path;
a first plunger in fluid communication with the pilot fuel path;
a second plunger in fluid communication with the primary fuel path and with the pilot fuel path;
a pilot fuel connection configured to be positioned within a cylinder head of an internal combustion engine when the fuel injector is installed in the internal combustion engine;
a hydraulic control chamber within the pilot fuel path; and
an injection valve at which the primary fuel path and the pilot fuel path connect to each other.