Patent ID: 6966505

Claim:
A fuel injector comprising: a housing having an inlet, an outlet and a longitudinal axis extending therethrough; a seat disposed proximate the outlet, the seat including a sealing surface and a seat orifice the seat orifice defining a surface extending generally parallel to the longitudinal axis between a first orifice portion and a second orifice portion; a closure member being reciprocally located within the housing along the longitudinal axis between a first position wherein the closure member is displaced from the seat, allowing fuel flow past the closure member, and a second position wherein the closure member is biased against the seat, precluding fuel flow past the closure member; a metering disc having a surface facing the seat orifice and defining a datum located at approximately a first distance from the first orifice portion and at approximately a second distance from the second orifice portion, the metering disc having a plurality of metering orifices extending therethrough along the longitudinal axis and about the longitudinal axis, at least one of the plurality of metering orifices being located outside a virtual circle defined by a projection of the seat orifice onto the metering orifice disc; and at least one channel formed between the orifice and the metering disc, the channel extending at a taper between a first end and second end, the first end contiguous to the second seat orifice portion at a first radius from the longitudinal axis, the second end disposed at a second radius with respect to the longitudinal axis; and a virtual extension of the taper extending towards the longitudinal axis forms an apex located at distance less than the first distance such that a flow of fuel between the orifice and the metering disc exiting through each of the metering orifices forms a spray angle oblique to the longitudinal axis.