简述尿素喷射控制单元(dosing control unit,DCU)的基本工作原理,对DCU的电源模块、信号输入调理模块、输出功率驱动模块、CAN通讯模块等硬件电路进行设计;并对DCU中的尿素喷射量、计量泵状态、车载诊断系统(OBD)等控制策略进行了深入研...简述尿素喷射控制单元(dosing control unit,DCU)的基本工作原理,对DCU的电源模块、信号输入调理模块、输出功率驱动模块、CAN通讯模块等硬件电路进行设计;并对DCU中的尿素喷射量、计量泵状态、车载诊断系统(OBD)等控制策略进行了深入研究;最后将自主开发的DCU与整个选择性催化还原(SCR)系统连接,在发动机台架上进行了欧洲稳态循环(ESC)、欧洲瞬态循环(ETC)及OBD故障诊断试验。试验结果表明:所开发的DCU能较好的控制SCR系统,使柴油机的排放达到国Ⅳ标准,并且可以对SCR系统进行实时故障诊断。展开更多
Rapid mixing and chlorine saving are two important problems that most drinking water industries are focus on, and this paper adopts chemical induction unit to compare with water jet injector to study what merits chemi...Rapid mixing and chlorine saving are two important problems that most drinking water industries are focus on, and this paper adopts chemical induction unit to compare with water jet injector to study what merits chemical induction unit has. The experiment chose coefficient of variability of chlorine concentration to evaluate the mix effect and used chlorine consumption to compare the two equipments. Distribution reservoir experiments show that chemical induction unit can completely mix chlorine less than 6.2 seconds and water jet injector can not completely mix in 3 minutes. Mixing pool experiments show that chemical induction unit can save chlorine compared with water jet injector, and can save more if more chlorine is consumed.展开更多
意力(ELAC)是一家德国音箱制造公司,它生产8个系列的音箱产品,从最平价的"1"系列到昂贵的"5"系列,其中的"4"系列代表了意力的最大成就,包括每对售价一万多美元的"音乐精神"(Spirit Of Music)音...意力(ELAC)是一家德国音箱制造公司,它生产8个系列的音箱产品,从最平价的"1"系列到昂贵的"5"系列,其中的"4"系列代表了意力的最大成就,包括每对售价一万多美元的"音乐精神"(Spirit Of Music)音箱.意力公司在Imago系列中应用了NXT技术,另外它还生产一个超重低音音箱系列.518是该品牌"5"系列中的一款音箱.展开更多
文摘简述尿素喷射控制单元(dosing control unit,DCU)的基本工作原理,对DCU的电源模块、信号输入调理模块、输出功率驱动模块、CAN通讯模块等硬件电路进行设计;并对DCU中的尿素喷射量、计量泵状态、车载诊断系统(OBD)等控制策略进行了深入研究;最后将自主开发的DCU与整个选择性催化还原(SCR)系统连接,在发动机台架上进行了欧洲稳态循环(ESC)、欧洲瞬态循环(ETC)及OBD故障诊断试验。试验结果表明:所开发的DCU能较好的控制SCR系统,使柴油机的排放达到国Ⅳ标准,并且可以对SCR系统进行实时故障诊断。
文摘Rapid mixing and chlorine saving are two important problems that most drinking water industries are focus on, and this paper adopts chemical induction unit to compare with water jet injector to study what merits chemical induction unit has. The experiment chose coefficient of variability of chlorine concentration to evaluate the mix effect and used chlorine consumption to compare the two equipments. Distribution reservoir experiments show that chemical induction unit can completely mix chlorine less than 6.2 seconds and water jet injector can not completely mix in 3 minutes. Mixing pool experiments show that chemical induction unit can save chlorine compared with water jet injector, and can save more if more chlorine is consumed.
文摘意力(ELAC)是一家德国音箱制造公司,它生产8个系列的音箱产品,从最平价的"1"系列到昂贵的"5"系列,其中的"4"系列代表了意力的最大成就,包括每对售价一万多美元的"音乐精神"(Spirit Of Music)音箱.意力公司在Imago系列中应用了NXT技术,另外它还生产一个超重低音音箱系列.518是该品牌"5"系列中的一款音箱.