Caterpillar Inc.
SINGLE-FLUID COMMON RAIL FUEL INJECTOR WITH FUEL RECOVERY FITTING AND ENGINE SYSTEM USING SAME

Abstract:

An internal combustion engine system includes an engine head, a pressurized fuel supply conduit, and a fuel return conduit. Fuel injectors are positioned in fuel injector bores in the engine head, and each include an intensifier plunger, a nozzle check, an injection control valve, and an intensifier control valve. Fuel recovery fittings are coupled to the plurality of fuel injectors and each fluidly connect an actuation fuel outlet in one of the fuel injectors to the fuel return conduit.