Patent ID: 9644590
Date: 2017-05-09
CPC Classifications: F02M

Claim:
1. A fuel injector for injecting fuel at high pressure into a combustion chamber of an internal combustion engine, comprising: an injector body including a longitudinal axis, an upper body portion, a lower body portion, a fuel delivery circuit, and an injector orifice to discharge fuel from the fuel delivery circuit into the combustion chamber, the fuel delivery circuit including an injector cavity within the lower body portion and a plurality of injection fuel delivery passages extending longitudinally in the injector body in fluid communication with the injector cavity to deliver injection fuel to the injector orifice, each of the plurality of injection fuel delivery passages extending through the upper body portion from a proximal end of the fuel injector to the injector orifice and including a passage cross sectional flow area, and at least one and less than a total number of the plurality of injection fuel delivery passages includes an orifice defined by the injector body having an orifice cross sectional flow area less than the passage cross sectional flow area and sized to reduce propagation of pressure waves.