Atkinson循环发动机燃油经济性与排放性试验

Experimental Study on Economy and Emission of Atkinson Internal Combustion Engine

摘要: 在外特性及汽油机常用工况点下，研究了高压缩比Atkinson循环发动机的燃油经济性与排放特性.研究表明：Atkinson循环发动机在外特性工况下，扭矩降低5%，有效燃油消耗率降低5%~8%左右；在2 000 r/min，0.2 MPa与3 000 r/min，0.3 MPa常用工况点下，扭矩损失较小，泵气损失分别降低34%与24%，有效燃油消耗率分别降低9.0%与7.5%；负荷越低，泵气损失减少越明显；在排放特性上，NO_x排放分别降低了65.0%与31.5%，HC排放增加23.7%与26.0%.

Abstract: To explore the economy and emission characteristics of Atkinson cycle internal combustion engine, a test was carried out for an Atkinson cycle internal combustion engine with a high compression ratio at the wide open throttle condition and the engine operating point commonly used. The test results show that, while torque outputs reduce by 5%, the brake specific fuel consumption (BSFC) was decreased by 5%~8%. When the engine was fixed at 2 000 r/min,0.2 MPa and 3 000 r/min,0.3 MPa, the PMEP was decreased by 34% and 24%, the BSFC was decreased by 9% and 7.5%. The lower the load, the more obviously the PMEP decreases. For the emission characteristics, NO_x was decreased by 65% and 31.5%,HC was increased by 23% and 27%.