| 摘要 |
A direct injection fuel injector system includes a fuel injector defining nozzle holes in an optimized cluster configuration. Each hole of a conventional multi-hole nozzle is replaced by two smaller, closely spaced holes in a two-hole-per-cluster configuration. The holes within a cluster are configured one above the other, in two horizontal planes or rows, spaced a distance apart from one another. The distance "d" between the nozzle holes in the cluster configuration, the clustered plume angle "alpha", which is the angular separation between the centerlines of the nozzle holes, as well as the included spray angle "beta", are optimized through computational fluid dynamics and combustion modeling so that an optimal compromise can be found between liquid penetration, spray penetration and air entrainment, whereby to minimize soot emissions.
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