喷油脉宽对电控汽油机燃用M85甲醇汽油的影响

Effects of Fuel Injection Pulse on an Electronically Controlled Gasoline Engine Fueled with M85 Methanol-gasoline Blends

为了在电控汽油机上优化M85甲醇汽油的应用,利用发动机台架试验,分析了电控汽油机直接燃用M85的主要问题,并通过放大喷油脉宽,增加M85甲醇汽油的喷油量来改善发动机性能。试验结果表明:与燃用汽油相比,喷油脉宽放大1.3倍时,发动机燃用M85甲醇汽油的功率和扭矩分别平均降低了6.83%和7.15%;小时燃油消耗量与有效燃油消耗率增大,但有效能耗平均降低6%;CO和HC排放分别平均降低11.28%和0.64%;NOx排放平均增加55.56%。

In order to optimize the application of M85 methanol-gasoline blends for electronically controlled engine, the problems were analyzed by bench tests of an engine when the electronically controlled engine was fueled directly with M85. The fuel injection pulse width signal is extended in order to increase injection quantity of M85 and improve the performance of engine fueled with M85. Experimental result shows that compared with gasoline fuel, with the injection pulse width amplified 1.3 times, M85 has, on average, a reduction of 6. 83% and 7.15% for power and torque respectively, a reduction of 6% for effective energy consumption rate although the fuel consumption per hour and brake specific fuel consumption increased, a reduction of 11.28% and 0.64% for CO emission and HC emission respectively, and an increase of 55.56% for NOx emission.