Study On Methods Of Achieving HCCI In High Compression Ratio Diesel With Electronic Controlled Common-Rail Injection System

Homogenous Charge Compression Ignition (HCCI), with the advantages of cleanliness and high-efficiency, is an attractive model of combustion in ICE. This paper focuses on the methods of achieving the HCCI in the high compression ratio diesel with the electronic controlled common-rail injection system. As the preparations, the applications of the electronic controlled common-rail injection system in the diesel have been studied. The result has shown the injection pressure and injection advanced angle affect the uniformity of pre-mixture. Secondly, the research on the methods of achieving the HCCI in the high compression ratio diesel with the electronic controlled common-rail injection system has been carried out. With the 80MPa injection pressure and 500BTDC～600BTDC advanced angle, HCCI can be achieved. At the same time, the characters of HCCI have been studied. Remarkably, applying the diesel/CNG dual fuel into HCCI is the first time in the world.There are two kinds of difficulties in practically applying HCCI. One is the high fuel-consuming, and the other is the narrow suitable operation range. One of the reasons causing these problems is the difficulty in controlling the time of ignition. In order to make the ignition controllable, this research offers a new combustion conception, Lean Homogeneous Charge Exciting Ignition (LHCEI), which reserves the necessary conditions ensuring the advantages of cleanliness and high-efficiency, but replaces the compression ignition with the exciting ignition. This paper pays more attention to exciting source, super high-energy ignition equipment.