Patent ID: 7980225
Filing Date: 2011-07-19
Classification: F02M

Abstract:
1. A fuel supply device for an internal combustion engine, the fuel supply device comprising: two fuel injection systems and a pulsation damper, each of the two fuel injection systems having a delivery pipe for storing fuel and a fuel injection valve provided in the delivery pipe, the delivery pipe of one fuel injection system being a first delivery pipe, the delivery pipe of the other fuel injection system being a second delivery pipe, wherein the device drives intermittently the fuel injection valve to open while pumping fuel to the two fuel injection systems with a common fuel pump, thereby supplying the fuel within the first and second delivery pipes, a first passageway through which fuel passes, wherein the first passageway includes the first delivery pipe and a communication path for communicating the first delivery pipe with the fuel pump, a second passageway through which fuel passes, wherein the second passageway is branched at a location closer to the fuel pump than to the fuel injection valve in the first passageway and connected to the second delivery pipe, wherein the second passageway includes the second delivery pipe and a branch path, wherein the branch path has an opening at the branch location, and a pressure introduction path for introducing fuel pressure into the pulsation damper, wherein the pressure introduction path has an opening, wherein an opposing portion in the first passageway to which the opening of the pressure introduction path is opposed includes part of the opening of the branch path such that the part of the opening of the branch path opposes to the opening of the pressure introduction path.