FUEL INJECTION NOZZLE

C-4118 FUEL INJECTION NOZZLE of the disclosure A fuel injection nozzle has a tubular body adapted to receive fuel, a tubular seat member mounted to the body, the seat member having an opening for discharging fuel and a valve seat surrounding the opening, a poppet valve member engageable with the valve seat to interrupt fuel flow through the opening, and an extension spring anchored to the body and to the valve member and biasing the valve member to engage the valve seat. The extension spring is a helically coiled spring with each coil lying close to the adjacent coils and with the coils at one end overlying an end of the body to anchor the spring to the body and to cause fuel flowing through the nozzle to pass between the coils of the spring; the spring thereby acts as a filter for fuel to be discharged by the nozzle. The seat member is axially movable relative to the body to adjust the length of the spring and thus the bias on the valve member whereby the desired valve-opening pressure differential may be established. The body is adapted to receive fuel through a restriction member that limits fuel flow through the opening. The valve member has a shank with a valve element at one end and a head at the other end, the shank being formed as a pin and the valve element as a ball that is welded to the pin. The coils at the other end of the spring surround the head to anchor the spring to the valve member. The body is adapted to receive fuel through a plastic fuel line having one end secured about the body and having an integral flange ultra-sonically formed on the other end to facilitate assembly to a source of fuel. The nozzle is received in a mounting bushing that has a central bore with an annular groove receiving and retaining a locating flange on the nozzle, and that has a plurality of peripheral beads adapted to sealingly secure said nozzle in an engine.