EGR system: Exhaust Gas Re-circulation is one of the methods of diluting the intake charge of the engine with exhaust gas, which reduces NOx emission. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostElectronic Control Unit (ECU) or Electronic Control Module (ECM Next PostElectronic Ignition