US 12,359,632 B1
Dual fuel system having overflow buffer for hastening fuel switchover
Daniel R. Baldwin, Mossville, IL (US); Eric Lee Schroeder, Germantown Hills, IL (US); and Bryan Edward Nelson, Chillicothe, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jul. 30, 2024, as Appl. No. 18/788,520.
Int. Cl. F02D 19/06 (2006.01)
CPC F02D 19/0694 (2013.01) [F02D 19/0676 (2013.01); F02D 19/0681 (2013.01); F02D 19/0684 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A dual fuel system comprising:
a plurality of fuel injectors;
a first fuel pump for a first fuel, and a first fuel conduit extending between the first fuel pump and the plurality of fuel injectors;
a second fuel pump for a second fuel, and a second fuel conduit extending between the second fuel pump and a fuel manifold fluidly connected to the plurality of fuel injectors; and
an overflow buffer arranged to receive a volume of the second fuel expelled from the second fuel conduit to hasten switchover of the engine from operation on the second fuel to operation on the first fuel, and a valve movable from a closed position to an open position fluidly connecting the overflow buffer to the second fuel conduit;
wherein each respective one of the plurality of fuel injectors is arranged to inject the first fuel and the second fuel for combustion in a plurality of cylinders in an engine.