Homogeneous charge compression ignition (HCCI) is an auto-ignition combustion process for internal combustion engines that is being researched by many auto manufacturers and research laboratories around the world. HCCI combines some benefits of gasoline and diesel engines and improves fuel efficiency and emissions significantly. In an HCCI engine, the air-fuel mixture is compressed to... https://prachicmi.livepositively.com/homogeneous-charge-compression-ignition-a-cleaner-automotive-technology/new=1