The smooth running and extremely low consumption of modern automotive diesel engines is dependent upon their fuel systems epitomized by the ultra-high pressure common rail diesel injection. Abrasive Flow Machining (AFM) is used to deburr and radius internal intersections inside the fuel pumps. These components experience high frequency pulsations at up to 26,000 PSI. Any stress risers caused by burrs and sharp edges within the high-pressure passages result in premature failure in this extremely demanding environment. To reduce emissions, the injectors require precision microholes as small as 0.005 inch diameter. These tiny holes are AFM flowed with low viscosity, microgritted media to precondition the injector and achieve more consistent flow and longer tip life.
