Patent ID: 6845930
Filing Date: 2005-01-25
Classification: F02M

Abstract:
1. 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 an orifice; a metering disc proximate the outlet, the metering disc having a plurality of metering orifices extending therethrough along the longitudinal axis; 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; and at least one channel formed between the orifice and the metering disc, the channel extending between a first end and second end, the first end disposed at a first radius from the longitudinal axis and spaced at a first distance from the metering disc, the second end disposed at a second radius with respect to the longitudinal axis and spaced at a second distance from the metering disc such that a product of the first radius and the first distance is approximately equal to a product of the second radius and the second distance, whereby a flow of fuel between the orifice and the metering disc is imparted with a radial velocity component such that a flow path exiting through each of the metering orifices forms a spray angle oblique to the longitudinal axis.