CPC F02M 51/0632 (2013.01) [F02M 47/027 (2013.01); F02M 51/0628 (2013.01); F02M 55/004 (2013.01); F02M 55/008 (2013.01); F02M 61/045 (2013.01); F02M 61/20 (2013.01); F02M 2200/28 (2013.01)] | 10 Claims |
1. A valve seat plate for a fuel injector comprising:
a disc-shaped body defining a center axis and having an outer peripheral surface extending circumferentially around the center axis and axially between a first side and a second side of the disc-shaped body;
the disc-shaped body defining a nozzle supply passage and a pressure control passage each extending through the disc-shaped body between the first side and the second side;
a valve seat is formed on the first side of the disc-shaped body and is fluidly connected to the pressure control passage;
a stress-limiting groove is formed in the first side and extends circumferentially around the valve seat at a location radially outward of the valve seat and radially inward of the nozzle supply passage;
the stress-limiting groove including a radially inward groove surface defining a first circle having a constant curvature 360 degrees around the center axis, and a radially outward groove surface defining a second circle having a constant curvature 360 degrees around the center axis; and
the disc-shaped body further including an end surface upon the first side oriented normal to the center axis and extending from the stress-limiting groove to the outer peripheral surface.
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