Combustion Analysis of Ammonia Fueled High Compression Ratio SI Engine with Glow Plug and Sub-Chamber

Abstract

Ammonia is a kind of energy carrier of hydrogen, and its use as engine fuel has been studied. However, it requires overcoming shortcomings of low combustion speed. We focus that the laminar combustion velocity of gasoline mixture with an excess air ratio at 2.0 is the same as that of ammonia. The combustion of ammonia was simulated by using gasoline experiments under lean-burn conditions and the experimental engine with the sub-chamber and the glow plug. Through experiments, data such as the optimal ignition angle and NOx emissions during lean combustion are obtained. Based on the above experimental data, authors did the co-combustion experiment of gasoline/ammonia/air. Under the conditions of excess air ratio of 1.1, 1.2, 1.3, maximum ammonia content is 33%NH3, the engine could be operated with less than 10% variation in IMEP.