Homogeneous Charge Compression Ignition (HCCI) Engine Control Strategies and Fuel-air Mixture Preparation Research

With the development of transportation in 21st century, the increasing demands of conventional fuels trigger off serious issues like climate change, health problem and fuel shortage, etc. To reduce the reliance on crude oils, the automobile industry has begun doing research for alternative engines and make some progress recently. This paper starts from concise backgrounds of fossil fuels and brief working principle of HCCI and summarize their strengths and weaknesses compared to conventional engines like less NOx but narrow load range. Besides, it also explains two approaches for homogeneous preparation, improvement of homogeneity and delay of auto-ignition, and finally mentions the future potential and research direction of HCCI.