Patent ID: 7303144

Claim:
A fuel supply apparatus that provides multiple fuel spray targeting angles towards a combustion chamber of an engine, the apparatus comprising: a flow of fuel at a plurality of pressures; and a fuel injector including: an inlet and an outlet and a passage extending along a longitudinal axis from the inlet to the outlet, the inlet receiving the flow of fuel; a seat assembly disposed in the passage, the seat assembly including a seat, a seat surface, an orifice, a first flow surface, a sealing surface, and a metering disc, the metering disc including a second flow surface communicating with the first flow surface, the metering disc having a plurality of metering orifices extending generally parallel to the longitudinal axis, the metering orifices being located in a first circle around the longitudinal axis that is greater than a second circle defined by a projection of the seat assembly orifice onto the metering disc; and a channel formed between the first and second flow surfaces, the channel having a first portion changing in cross-sectional area as the channel extends outwardly from the orifice of the seat to a location that encircles the plurality of metering orifices such that the flow of fuel through the channel at a first fuel pressure forms a first spray angle oblique to the longitudinal axis and the flow of fuel at a second fuel pressure forms a second spray angle oblique to the longitudinal axis.