Fuel injector with integral damper

摘要

An engine fuel injector (10) includes an internal fuel passage (12) in which pressure waves can develop upon opening and closing of an injection valve (22). A fuel pressure damper (48) is associated with the fuel passage (12) and operates to vary the internal volume of the fuel passage in a manner to reduce the amplitude of pressure variations and pressure waves in the fuel passage (12). A variety of fuel pressure damper embodiments (FIGS. 2-25) are disclosed.