The in cylinder tumble motion of a 4 valve engine with one inlet valve opening was studied on steady flow rig with vane anemometer and the position of maximum tumble vector was found; The forming process of in cylinder tumble was studied with Hot Wire Anemometer. 在稳流气道试验台上用叶片风速仪测量了4气门发动机单气门工作时缸内的滚流运动,确定了最大滚流矢量的位置;
Studies on Steady Measurements of In-Cylinder Tumble in a 4-Valve Engine with One Inlet Valve Opening(IVO) 4气门发动机单气门工作时缸内滚流运动的稳态测量研究
By applying black box theory inlet pressure, inlet subcooling, outlet pressure and valve opening are selected as influence factors to flow coefficient of electronic expansion valve ( EEV ). 根据黑箱理论提出将阀前压力、阀前过冷度、阀后压力和膨胀阀流通面积作为膨胀阀流量系数的影响参数。
Exhaust temperature is as the main controlled variable to regulate the steam valve opening coarsely; inlet air temperature is as the deputy variable to regulate the steam valve opening subtly, for fine-tuning of the steam valve opening. 其中以排风温度为主被控变量,进行蒸汽阀门开度粗调;进风温度为副被控变量,进行蒸汽阀门开度的辅助微调。
Siemens 300 series PLC controller are used to establish the program. The cascade control method of the inlet temperature and exhaust temperature of double-loop of the heating steam is used to regulate the valve opening. 用西门子300系列PLC控制器建立一套新的程序,采用串级控制方法,用进风温度和排风温度双回路控制加热蒸汽阀门开度。