Patent ID: 7594499
Filing Date: 2009-09-29
Classification: F02M

Abstract:
1. A fuel feed apparatus for supplying high-pressure fuel to a common rail of an accumulator fuel injection system, the accumulator fuel injection system including an injector for injecting high-pressure fuel accumulated in the common rail into a combustion chamber of an internal combustion engine, the fuel feed apparatus comprising: a high-pressure pump for pressurizing fuel and press-feeding the fuel to the common rail; a feed pump for pumping fuel from a fuel tank to the high-pressure pump; a fuel filter provided downstream of the feed pump for filtering fuel pumped from the feed pump; a return passage for returning fuel from a downstream of the feed pump to an upstream of the feed pump; a return flow control unit for controlling flow of fuel returning through the return passage; and a vent valve provided downstream of the feed pump and upstream of the fuel filter for venting gas from the downstream of the feed pump, wherein the return passage is adapted to return fuel from a passage between a downstream of the feed pump and an upstream of the fuel filter.