Combustion chamber: The small space in the engine cylinder head and/or piston into which air-fuel mixture (in petrol engines) or air (in diesel engines) is compressed and is burnt. 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 PostCompressed Natural Gas (CNG) Next PostCommon rail injection