FUEL LUBRICATED PUMP AND COMMON RAIL FUEL SYSTEM USING SAME

摘要

A method of operating a fuel system (10) for a compression ignition engine includes supplying bio fuel, which may be part of a mixture, to an inlet (31) of a fuel lubricated pump (16). At least one bearing (47) of the pump (16) is lubricated with the bio fuel. The fuel lubricated pump (16) supplies high pressure fuel to a common rail (14). A plurality of fuel injectors (12) are fluidly connected to the common rail (14), and each include at least one nozzle orifice (39) for injecting the biofuel into the combustion space of the engine. Nozzle orifice coking is limited at least in part by employing a spinodal bronze alloy in the bearing (47) of the fuel lubricated pump (16).