汽油机泵气损失特性及其对性能的影响  

Pumping Loss Characteristic of Gasoline Engine and Its Effect on Performance

作　　者：杨弢[1] 杜爱民[1] 万玉[1] 

机构地区：[1]同济大学汽车学院,上海201804

出　　处：《佳木斯大学学报（自然科学版）》2012年第6期839-843,共5页Journal of Jiamusi University：Natural Science Edition

摘　　要：根据某型号1.8L自然吸气汽油机的几何参数、试验数据和边界条件,建立一维仿真模型,分析了汽油机部分负荷的泵气损失特性、热效率特性和油耗特性,结果显示部分负荷时随着负荷的降低,节气门处压力损失增加,泵气损失增加,指示热效率降低,燃油经济性恶化,表明降低节气门处的压力损失对降低汽油机的泵气损失,提高热效率,降低燃油经济性有重要意义.According to the geometric parameters, test data and boundary conditions of an l. 8L naturally aspirated gasoline engine, one- dimensional simulation models were modeled. On the basis of simulation results of gasoline engine, pumping loss characteristic, thermal efficiency characteristic and BSFC characteristic of part load were analyzed. The results show that pressure drop at throat increases, pumping loss raises, indicated effi- ciency decreases and fuel economy deteriorates with the decrease of the load, which means that reducing pressure drop at throat is important to reduce pumping loss, increase thermal efficiency and reduce BSFC.

关 键 词：汽油机 泵气损失 热效率 

分 类 号：U464[机械工程—车辆工程]