| 摘要 |
The present invention forms a gas inlet valve assembly, which controls a gas fuel injection quantity in a dual fuel engine, in a dual pipe structure by a simple structure. The present invention, which is the gas inlet valve assembly of a dual fuel engine which controls an injection quantity of gas fuel which is supplied to a cylinder head by being connected to an end part of a distribution pipe (30) of the dual pipe structure which is branched from a main feed pipe (20), includes: a gas inlet valve (150) which is settled in the upper side of the cylinder head and discharges the gas fuel to the intake port of the cylinder head by controlling the quantity of the gas fuel which enters a gas fuel inlet hole (156); and an external housing (110) which is formed to have an open lower part, covers the gas inlet valve (150), and has an opening part of a lower part settled and installed in the upper side of the cylinder head. The external housing (110) has: a space part (111) which makes air pass around the gas inlet valve (150) while accommodating the gas inlet valve (150) inside; a gas fuel induction hole (112a) which connects the distribution pipe (30) with the gas fuel inlet hole (156) of the gas inlet valve (150); a gas induction extension part (112) which is connected to the gas fuel inlet hole (156) of the gas inlet valve (150); and an air induction hole (114) for letting air enter the space part (111) of the external circumference of the gas inlet valve (150) by connecting an air path between an outer lateral side pipe (31) and an inner lateral side pipe (32) in the distribution pipe (30) and the space part (111) in the external housing (110). |
