Exploring Fuel Characteristics and Performance in HCCI Engines with Alternative Fuels

In recent years, as automobiles have become essential in daily life, the demand for enhanced engine performance and environmental protection has increased rapidly. Traditional diesel and gasoline engines are known to produce excessive Nitrogen Oxide (NOx) and Particulate Matter (PM) emissions, coupled with low fuel utilization and combustion efficiency. This paper provides a concise overview of the current characteristics of Homogeneous Charge Compression Ignition (HCCI) engines and explores methods to enhance their performance and thermal efficiency using alternative fuels that surpass traditional options in various aspects. Biodiesel emerges as a viable substitute for diesel due to its environmental benefits and agricultural potential. Hydrogen, gaining popularity among engineers and automotive manufacturers, is also explored for its promise of clean energy. Additionally, natural gas, methanol, and ethanol are highlighted for their suitability under different thermal conditions. The paper further introduces a dual fuel mode in H2/air-fueled HCCI engines, using a compound of H2O2 and H2, and discusses the effectiveness of fuels mixed with nano additives like Al2O3 and FeCl3. Through these alternatives, this study aims to present a pathway to improved engine performance and reduced environmental impact, paving the way for future advancements in HCCI engine technology.