Patent ID: 7762478
Filing Date: 2010-07-27
Classification: B05B,F02M

Abstract:
1. A fuel injector for forming a metered fuel spray in a fuel injection system of an internal combustion engine, the fuel injector comprising: a body having a fuel injector inlet and a fuel injector outlet; a positive displacement pump in the body for pumping fuel from the inlet through a pumping chamber to the outlet; an outlet check valve located in the fuel injector outlet, the outlet check valve connected to the pumping chamber for discharging fuel from the pumping chamber, the outlet check valve comprising an outlet valve disk having a periphery and a central hole; an annular outlet check valve sealing surface on the fuel injector body, the annular outlet check valve sealing surface facing the periphery of the outlet valve disk; an inlet check valve located in the fuel injector inlet, the inlet check valve connected to the positive displacement pump for admitting fuel to the pump, the inlet check valve comprising an inlet valve disk having a periphery and a central hole; an annular inlet check valve sealing surface on the fuel injector body, the annular inlet check valve sealing surface facing the periphery of the inlet valve disk; and a check valve disk retainer pin disposed in the central holes of the inlet and outlet check valve disks, the retainer pin exerting a force on the inlet valve disk biasing the periphery of the inlet valve disk against the inlet check valve sealing surface, the retainer pin further exerting a force on the outlet valve disk biasing the periphery of the outlet valve disk against the outlet check valve sealing surface.