초록 ▼

A fuel injector nozzle includes a nozzle body and a poppet disposed in the body for reciprocating movement. The body has an internal bore surrounding the poppet. The internal bore tapers in a constant angle of taper from a front seating region to a fuel reservoir region. The poppet has a correspondi

A fuel injector nozzle includes a nozzle body and a poppet disposed in the body for reciprocating movement. The body has an internal bore surrounding the poppet. The internal bore tapers in a constant angle of taper from a front seating region to a fuel reservoir region. The poppet has a corresponding surface which diverges slightly from the bore. The surfaces of the bore and poppet form flow control surfaces which terminate in a sharp-edged orifice at the front face of the nozzle. When the poppet is displaced to an open or flow position, fuel is accelerated to the orifice and atomized into a combustion chamber. The poppet surface being formed so as to properly direct fuel after the poppet surface is machined.

대표청구항 ▼

1. An injector nozzle assembly for directing a flow of fuel from a source to a combustion chamber of an internal combustion engine, the assembly comprising:a nozzle having a planar tip surface and a bore defining an outer flow directing surface, the bore comprising a portion of a circular cone exten

1. An injector nozzle assembly for directing a flow of fuel from a source to a combustion chamber of an internal combustion engine, the assembly comprising:a nozzle having a planar tip surface and a bore defining an outer flow directing surface, the bore comprising a portion of a circular cone extending from an internal region to a seat portion adjacent to the planar tip surface at a first angle of taper in relation to a central axis; and a poppet defining an inner flow directing surface, centered within the bore along the central axis, and moveable between a sealed position and a flow position, the poppet comprising a portion of a circular cone extending at a second angle of taper to the central axis from a first diameter of the poppet to a sealing surface adjacent to an end surface at a second diameter of the poppet, the second angle of taper being larger than the first angle of taper, wherein when the poppet is in the sealed position the inner flow directing surface is sealed against the seat portion of the outer flow directing surface and the end surface is substantially coplanar with the planar tip surface, and when the poppet is in the flow position fuel is directed into the combustion chamber between the inner flow directing surface and the outer flow directing surface, there being a third diameter on the inner flow directing surface that marks a shortest distance between the inner flow directing surface and the outer flow directing surface, the distance along the surface of the inner flow directing surface from the first diameter to the third diameter being longer than the shortest distance between the inner flow directing surface and the outer flow directing surface.