Patent ID: 7578450
Filing Date: 2009-08-25
Classification: F02M

Abstract:
1. A fluid injector, comprising: a nozzle body having first and second body portions and at least one fluid injection orifice within the second body portion, the nozzle body being configured for transmitting fluid from the first body portion toward the orifice; a check member movably arranged inside the nozzle body for affecting fluid flow through the orifice and having a contoured outer surface defining (i) a recessed region, (ii) a generally convex region forming at least a portion of the recessed region, and (iii) a first generally concave region between the recessed region and an end of the check member, wherein the recessed region has a bottom portion that is generally centered on the longitudinal axis of the at least one fluid injection orifice when the check member is in a flow blocking position, and wherein the generally convex region is a continuous outward curve having a predetermined curvature, and the first generally concave region is a continuous inward curve having a second predetermined curvature.