Port fuel injection: Also called multi-port fuel injection, it is the system used in petrol engines wherein there is a fuel injector at each intake port to spray fuel into the intake air as it approaches the intake valve. 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 PostPoppet valve Next PostPower