This experimental research deals with the characteristic work on the performance, combustion, and exhaust pollutants for unleaded gasoline mixed with n-pentanol in the proportion of 5%, 10%, 15%, and 20% (by vol.) of the total quantity. The trials were performed on a 1-cylinder, 4-stroke, water-cooled, port-fuel injection (PFI) spark-ignition (SI) engine loading an AC active dynamometer so as to scrutinize the aforementioned behaviors of n-pentanol. The test fuels (unleaded gasoline, Pt5, Pt10, Pt15, and Pt20) were experimented with at various loads ranging from 1 kW to 5 kW with intervals of 1 kW under 1600 rpm fixed speed. The findings coming from the tests exhibited that the infusion of n-pentanol to gasoline has caused to reducing the HC, CO, CO₂, and NO emissions in contrast to the baseline gasoline however, O₂ levels were observed to be higher. At all of the engine loads, n-pentanol blends exhibited an improvement in BTE when compared with gasoline by reason of the inherent oxygen concentration of used alcohol. As hoped, the peak in-cylinder pressure and apparent heat release rate (HRR) values for the tested fuel blends were found to be higher than that of UG test fuel. It is to be noticed that the higher-order alcohol namely n-pentanol may be used as a partial replacement for gasoline fuel in the SI engine applications according to the experimental outcomes.

本实验研究以5%、10%、15%、20%（体积比）的比例与正戊醇混合的无铅汽油的性能、燃烧和尾气污染物特性研究. 试验是在装有交流主动测功机的 1 缸、4 冲程、水冷、端口燃料喷射 (PFI) 火花点火 (SI) 发动机上进行的，以检查上述正戊醇的行为。测试燃料（无铅汽油、Pt5、Pt10、Pt15 和 Pt20）在 1 kW 到 5 kW 的各种负载下进行试验，间隔为 1 kW，在 1600 rpm 固定速度下。试验结果表明，向汽油中注入正戊醇可降低 HC、CO、CO ₂然而，与基准汽油相比，NO 排放量更高，但观察到O ₂水平更高。在所有发动机负荷下，由于所用酒精的固有氧浓度，与汽油相比，正戊醇混合物表现出 BTE 的改善。正如所希望的那样，发现测试燃料混合物的峰值缸内压力和表观热释放率 (HRR) 值高于 UG 测试燃料的值。值得注意的是，根据实验结果，高阶醇即正戊醇可在SI发动机应用中作为汽油燃料的部分替代品。