Patent ID: 9212639
Filing Date: 2015-12-15
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel injector comprising: an injector body defining a first fuel inlet, a second fuel inlet, a first nozzle outlet set, a second nozzle outlet set, and a drain outlet, and defining therein a first control chamber and a second control chamber; a first check valve member with a closing hydraulic surface exposed to fluid pressure in the first control chamber, and being movable between a closed position in contact with a first seat to fluidly block the first fuel inlet from the first nozzle outlet set, and an open position out of contact with the first seat to fluidly connect the first fuel inlet to the first nozzle outlet set; a second check valve member with a closing hydraulic surface exposed to fluid pressure in the second control chamber, and being movable between a closed position in contact with a second seat to fluidly block the second fuel inlet from the second nozzle outlet set, and an open position out of contact with the second seat to fluidly connect the second fuel inlet to the second nozzle outlet set; a first control valve member positioned in the injector body and being movable along a common centerline between a first position in contact with a first seat at which the first control chamber is fluidly blocked from the drain outlet, and a second position out of contact with the first seat at which the first control chamber is fluidly connected to the drain outlet; and a second control valve member positioned in the injector body and being movable along the common centerline between a first position in contact with a second seat at which the second control chamber is fluidly blocked from the drain outlet, and a second position out of contact with the second seat at which the second control chamber is fluidly connected to the drain outlet, at least one of the first seat and the second seat being a flat seat, and at least one of the first control valve member and the second control valve member having a self alignment feature with respect to the flat seat.