Damped fuel rail with over-pressure protection

摘要

A fuel rail assembly (50) includes an integral pressure damper (64) and an over-pressure stop (80) to prevent the damper from flexing beyond it elastic limit. The rail assembly (50) also includes injector cups (58) formed outwardly relative to the rail (54) to provide substantially unimpeded fuel flow to the injector (38). The fuel rail assembly (50) further includes a damper cover (74) to protect the damper from outside damage. The damper cover can be hermetically sealed to form an air chamber (88) above the damper and opposite the fuel chamber (86) in the fuel rail thereby providing a means for keeping the pressure differential between the chambers (86,88) in an APDI fuel injection system substantially constant.