Fuel injection nozzle

A valve assembly including a valve housing adapted to be connected to a conduit supplying fuel under pressure, said valve housing having a surface and including an axial bore which extends along an axis, which is adapted to communicate with the conduit, and which has an end portion defining a valve seat, and a transverse bore communicating with said axial bore, a valve member moveable in said bore and along said axis between a closed position in which said valve member is engaged with said valve seat and an open position in which said valve member is spaced from said valve seat, said valve member including an end portion, a retainer rigidly fixed to said end portion of said valve member such that said retainer is spaced from said surface of said valve housing when said valve member is in said closed position and such that said retainer engages said surface of said valve housing when said valve member moves to said open position, and including a cylindrical outer surface with an outside diameter, a spring bearing against said valve housing and against said retainer such that said spring biases said valve member into said closed position when the fuel pressure in said valve assembly is below a predetermined pressure, and such that said valve member moves to said open position against the force of said spring when the fuel pressure in said valve assembly is above said predetermined pressure, and a cup-shaped member including a wall extending transversely to said axis and including an axial bore, and a cylindrical portion which extends from said transverse wall, which is fixed to said valve housing, and which includes an inner surface having an inside diameter greater than said outside diameter of said retainer and which defines an interior space communicating through said transverse bore with said axial bore in said valve housing.

A valve assembly including a valve housing adapted to be connected to a conduit supplying fuel under pressure, said valve housing having a surface and including a bore which extends along an axis, which is adapted to communicate with the conduit and which has an end portion defining a valve seat, a valve member moveable in said bore and along said axis between a closed position in which said valve member is engaged with said valve seat and an open position in which said valve member is spaced from said valve seat, said valve member including an end portion, a retainer rigidly fixed to said end portion of said valve member such that said retainer is spaced from said surface of said valve housing when said valve member is in said closed position and such that said retainer engages said surface of said valve housing when said valve member moves to said open position, a spring bearing against said valve housing and against said retainer such that said spring biases said valve member into said closed position when the fuel pressure in said valve assembly is below a predetermined pressure, and such that said valve member moves to said open position against the force of said spring when the fuel pressure in said valve assembly is above said predetermined pressure, and a cup-shaped member including a wall extending transversely to said axis and including an axial bore, and a cylindrical portion which extends from said transverse wall and which is fixed to said valve housing.