Patent ID: 8251046

Claim:
A fuel system for an internal combustion engine having a low pressure fuel pump pumping fuel through a fine filter to a high pressure fuel pump that delivers pressurized fuel to corresponding fuel injectors via a fuel rail, the system comprising: a fuel return line coupling the fuel injectors into a low pressure fuel line between the low pressure fuel pump and the fine filter, the fuel return line permitting bidirectional flow between the low pressure fuel pump and the injectors to bias internal injector components to a desired starting position; a restrictor disposed in the fuel return line upstream of the fine filter; a fuel rail return line coupled between a first fuel rail and a fuel tank; a single fuel cooler disposed only in the fuel rail return line; a second fuel rail with a first portion of fuel injectors coupled to the first fuel rail, a second portion of fuel injectors coupled to the second fuel rail, and the high pressure line coupled to one of the fuel rails; and a cross-over line coupled between the first fuel rail and the second fuel rail.