US 12,297,795 B1
Multi-function fuel injector valve in dual fuel system and fuel system operating method
Eric L. Schroeder, Germantown Hills, IL (US); Dana R. Coldren, Secor, IL (US); Robert Graumüller, Kiel (DE); Kaushik Krishnamurthy, Manteno, IL (US); Dean C. Diers, Rapid City, SD (US); Lifeng Wang, Dunlap, IL (US); and Jianhua Zhang, Dunlap, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jun. 4, 2024, as Appl. No. 18/732,686.
Int. Cl. F02M 43/04 (2006.01); F02D 19/06 (2006.01); F02M 55/00 (2006.01)
CPC F02M 43/04 (2013.01) [F02D 19/0673 (2013.01); F02D 19/0694 (2013.01); F02M 55/008 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fuel injector comprising:
an injector housing forming a low-pressure fuel space, a first-fuel nozzle supply passage, a second-fuel nozzle supply passage, a combined-fuel outlet passage fluidly connected to both of the first-fuel nozzle supply passage and the second-fuel nozzle supply passage and extending to a plurality of nozzle outlets, and a nozzle check control cavity;
a nozzle check movable between a closed position blocking the plurality of nozzle outlets from the combined-fuel outlet passage, and an open position at which the plurality of nozzle outlets are fluidly connected via the combined-fuel outlet passage to both the first-fuel nozzle supply passage and the second-fuel nozzle supply passage; and
a control valve movable between a first position blocking the low-pressure fuel space from both the first-fuel nozzle supply passage and the nozzle check control cavity, and a second position at which the low-pressure fuel space is fluidly connected to both the first-fuel nozzle supply passage and to the nozzle check control cavity.