We have always heard about two types of engines which dominate the Automotive market when it comes to internal combustion engines, Namely: Spark Ignition (S.I) and Compression Ignition (C.I). Homogeneous Charge Compression Ignition (HCCI) engine is a blend of both S.I and C.I engines. Also, read: IC ENGINE: COMPONENTS AND THEIR FUNCTIONS, TYPES, AND TERMINOLOGY Inspecting the ignition system How a diesel engine works We all know that air-fuel mixture in an S.I engine is a homogeneous charge (i.e.) air and gasoline easily mix at room temperature and require a spark plug to be ignited. Diesel, on the other hand, is less volatile and C. I engine can combust fuel as soon as it reaches the Autoignition temperature without the … Continue reading Homogeneous Charge Compression Ignition (HCCI) engine