Hydrogen and natural gas comparison in diesel HCCI engines -a review

摘要: Abstract—Homogeneous charge compression ignition (HCCI) enginesuse a new mode of combustion. The new challenges in developing HCCI engines arethe difficultiesin: controlling the auto-ignition mixture and heat release rate at high load operation, achieving a cold start, meeting emission standards and controlling knock. At low engine speeds, early can occur, possibly leading to knocking, while late at high speeds will make susceptible misfire. Hydrogengreatly reduces levels but with reduced power. However, when it is combined diesel dual fuel mode, NOx, CO particulate matter emission levels are achieved increasing efficiency by 13-16%. Numerical methods areused predict HCCI engines’ performance, which cost efficient compared toexperimentation alone. multi-zone method promises better simulation results by combining detailed chemical kineticswith simplified 3Dmodellingso that turbulence and inhomogeneity mixture considered; good agreement between simulations experiments has been achieved. Specific strategies used experimental and numerical methods, other issues associated withHCCI engines discussed this paper.