Patent ID: 9212638
Filing Date: 2015-12-15
Classification: F02M

Abstract:
1. A fuel injection apparatus comprising: a fuel tank containing a liquefied gas fuel; a feed pump feeding the liquefied gas fuel from the fuel tank; a high-pressure pump pressurizing and discharging the liquefied gas fuel supplied from the feed pump; and a feed pipe introducing the liquefied gas fuel to the high-pressure pump from the feed pump, wherein: the high-pressure pump is provided with: the fuel injection apparatus further comprises a passage expansion pipe of which passage area is greater than that of the fuel gallery, the passage expansion pipe being arranged between the feed pipe and the passage expansion pipe, the high-pressure pump is provided with an overflow valve having a valve body which moves in a valve-open direction so as to return the liquefied gas fuel in the fuel gallery to the fuel tank when a pressure in the fuel gallery becomes greater than a predetermined pressure; and a passage area “Ag” of the fuel gallery, a passage area “Af” of the passage expansion pipe and a passage area “Aofv” of the overflow valve has a following relationship: