18-06-2012, 02:51 PM
HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) ENGINE
This paper briefly describes history of origin, worldwide research work results, advantages and problems following from specific combustion process, typical for HCCI engines which is so different from well known and widely used spark and diesel engines. HCCI combustion has been drawing the considerable attention due to high efficiency and lower nitrogen oxide (NOx) and particulate matter (PM) emissions. However, there are still tough challenges in the successful operation of HCCI engines, such as controlling the combustion phasing, extending the operating range, and high unburned hydrocarbon and CO emissions. Massive research throughout the world has led to great progress in the control of HCCI combustion More than twenty years left since the HCCI concept was first proposed and demonstrated and steady progress has been made in developing the technology.
Previous and current research works in the world have indicated that engine working in HCCI mode can be supplied by means of different fuels at extremely low emissions and high efficiencies. All world observations have been included and described in current work.