CAJ | 학술논문

研究汽车排气系统内压力波的形成及其传播过程与发动机工作状况之间的关系,为及时诊断故障,利用GT-POWER软件建立一个四缸四行程的汽油发动机模型.计算结果显示在发动机的一个工作周期内,压力波出现了四个波峰和波谷,分别对应四个汽缸的排气行程;修改发动机的转速,会影响排气压力波的幅值、谐波成分、相位等参数;在排气行程末期,排气压力波在排气管内发生干涉、叠加和负压效应.结果对利用排气压力波进行发动机的综合故障诊断具有重要意义.
연구기차배기계통내압력파적형성급기전파과정여발동궤공작상황지간적관계,위급시진단고장,이용GT-POWER연건건립일개사항사행정적기유발동궤모형.계산결과현시재발동궤적일개공작주기내,압력파출현료사개파봉화파곡,분별대응사개기항적배기행정;수개발동궤적전속,회영향배기압력파적폭치、해파성분、상위등삼수;재배기행정말기,배기압력파재배기관내발생간섭、첩가화부압효응.결과대이용배기압력파진행발동궤적종합고장진단구유중요의의.
To study the relationship between the formation and dissemination of pressure wave and engine working condition,this paper creates a four-cylinder four-stroke gasoline engine model with GT-POWER software.The results show that four pressure wave crests and troughs have appeared,corresponding to the four-cylinder exhaust travel respectively.When the engine speed is modified,exhaust pressure will affect the amplitude of the wave,harmonic components,phase,and other parameters.At the end of exhaust trip,interference,superposition,negative effect of exhaust pressure wave will occur in the exhaust pipe.The results are of great significance to engine integrated fault diagnosis using exhaust pressure wave.