Pilot injection: Small amount of fuel injected into the combustion chamber before the main fuel delivery. Usually employed in diesel engines. 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 PostPiezoelectric ignition Next PostPiston