INVESTIGATION ON THE DYNAMIC RESPONSE PERFORMANCE OF A NOVEL THREE-WAY SOLENOID VALVE

In order to meet the increasinglystrict emissionstandards andi mprove the perfor mance of diesel en-gines,using electronic control systemin diesel en-gines becomes more and more popular.In the com-mon-rail injection system of diesel engines,injec-tion ti ming and injection duration are controlled bythe solenoid valve.The perfor mance of common-rail injection systemis directly deter mined by thesolenoid valve[1-2].A novel high-speed three-waysolenoid valve used in the common-rail injectionsyste…     

奥迪A4L无级变速器软件故障

<正>故障现象一辆2009年生产的奥迪A4L,1.8T发动机,搭载8挡CVT手自一体OAW型变速器。行驶里程110,000km,初期进厂时用户描述该车变速器报警灯点亮,起步加速无力且有耸车现象,同时,发动机还有加不上油门的情况(其实是发动机限扭功能的表现)。故障诊断与排除车辆进厂后没有急于试车,而是利用故障诊断仪进行系统检测,在变速器系统中检测到3个故障码,分别是:P1741,离合器匹配达到极限,主动/静态;P1743,离合器打滑监     

车用金属载体催化剂铝溶胶制备试验研究

分别以氯化铝、氧化铝、氢氧化铝和拟薄水铝石为原料制备了铝溶胶,并对铝溶胶的粘接强度和稳定性进行了检测与评价。结果表明,以氯化铝为原料制备的铝溶胶理化特性最好,但容易引入有毒害作用的氯离子;以氧化铝粉和氢氧化铝为原料制备的铝溶胶稳定性和粘接强度不能满足金属载体催化剂涂层的制备要求;以拟薄水铝石为原料制备的铝溶胶不仅能满足金属载体催化剂涂层制备的要求,且不会向催化剂中引入有毒害作用的氯离子,是制备铝溶胶的最佳材料。