Vapor recovery system for a direct injector fuel rail assembly

Abstract

A fuel rail assembly for injection of fuel includes a fuel injector socket having a fuel injector assembly inserted, a collar surrounding said fuel injector assembly and providing a gap there between; and a seal sealing the gap between the collar and the fuel injector assembly thereby forming a secondary chamber. Fuel vapors that escape the primary seal of the fuel injector installed in the fuel injector socket are captured in the secondary sealed chamber and are directed to an evaporative control system. The collar is designed such that only minimum modifications are required to both current injectors and current injector sockets. By integrating the collar into a DIG fuel rail assembly in accordance with the invention current DIG internal combustion engines may be converted to PZEV DIG engines.

Dependencies are inferred from the claim text.