This experimental study demonstrates the potential to apply the thermochemical fuel reforming (TFR) concept to simultaneously reduce emissions and improve brake specific fuel consumption in a spark-ignition natural gas engine. CH₄, H₂ and CO are the major components of TFR exhaust gas over a range of rich equivalence ratios. A numerical analysis is conducted to illustrate the chemical reaction pathways for H₂ and CO formation, which occurs in the cylinder during the TFR process. The main reaction pathways for H₂ and CO formation under 3 modeling conditions (20%, 50% and 80% fuel consumed) are different from each other. According to the experimental analysis, thermochemical fuel reforming gas improves combustion performance and accelerates the burn rate in every phase of the natural gas engine. Combustion stability, brake thermal efficiency, brake specific fuel consumption (BSFC), brake specific hydrocarbon (BSHC) and brake specific carbon monoxide (BSCO) emissions can also be improved by TFR. The brake specific oxides of nitrogen (BSNOx) emissions for natural gas engines, combined with a TFR system, are still lower than those of an original natural gas engine in the same operation mode. Thermochemical fuel reforming has been shown to be effective in simultaneously reducing emissions and improving thermal efficiency for a spark-ignition natural gas engine. Furthermore, a 1.2 equivalence ratio for cylinder 4 (TFR cylinder) can be recommended in future research on TFR optimization, based on BSFC and combustion stability.

这项实验研究证明了在火花点火天然气发动机中应用热化学燃料重整（TFR）概念同时减少排放并提高制动器特定燃料消耗的潜力。在丰富的当量比范围内，CH ₄，H ₂和CO是TFR废气的主要成分。进行了数值分析，以说明HFR和TFR过程中在钢瓶中发生的H ₂和CO形成的化学反应途径。H ₂的主要反应途径在3种建模条件下（消耗20％，50％和80％的燃料）的CO生成量彼此不同。根据实验分析，热化学燃料重整气体改善了天然气发动机各相的燃烧性能并加快了燃烧速率。TFR还可以改善燃烧稳定性，制动器热效率，制动器特定燃料消耗量（BSFC），制动器特定碳氢化合物（BSHC）和制动器特定一氧化碳（BSCO）排放。刹车的氮氧化物（BSNO x）与TFR系统结合使用的天然气发动机的排放仍低于相同运行模式下原始天然气发动机的排放。业已证明，热化学燃料重整可有效减少火花点火天然气发动机的排放并提高其热效率。此外，在未来的TFR优化研究中，基于BSFC和燃烧稳定性，可以建议气缸4（TFR气缸）的当量比为1.2。