在增压柴油机的进气道上加装甲醇喷射系统,研究不同甲醇喷射比例对柴油机性能和排放的影响.结果表明,用甲醇替代部分柴油,在外特性试验中,甲醇的喷入扩展了发动机扭矩和功率范围,最大升高幅值分别为12.1％和12.0％.同时,柴油的消耗率降低,最大降幅为22.6％,使用经济性有所改善,费用支出率最高降幅为15.2％,但高转速高负荷时费用支出率升高了4.4％.进气道喷甲醇有效抑制了NOx的排放,最高降幅达到84.5％,碳烟的排放升高.%The experimental research was carried out on a turbocharged and inter-cooled diesel engine with a set of methanol-injection system designed on the intake port.The diesel performances and emissions with different quantity of the inlet methanol sprayed are analyzed.The results show that the methanol injected extends the range of torque and power by 12.1％ and 12.0％ at the largest on outer performance.The specific diesel consumption is reduced by 22.6％ at the largest; The reality economy is improved and the expense is reduced by 15.2％ at the largest but the expense is increased by 4.4％ at the largest under high speed and high load ;The methanol injection at intake port reduces the emission of NOx by 84.5％,but the PM emission is higher.
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