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    • 43. 发明授权
    • Efficiency determination for a selective-catalytic-reduction catalyst
    • 选择性催化还原催化剂的效率测定
    • US08629781B2
    • 2014-01-14
    • US13101348
    • 2011-05-05
    • Janean E. KowalkowskiStephen Paul LevijokiJohn F. Van Gilder
    • Janean E. KowalkowskiStephen Paul LevijokiJohn F. Van Gilder
    • G08B17/10
    • F01N3/2066F01N11/00F01N2550/02F01N2900/0404F01N2900/1621Y02A50/2325Y02T10/24Y02T10/47
    • A method of assessing overall efficiency of a selective-catalytic-reduction catalyst includes monitoring instantaneous efficiency of the catalyst. The method also includes determining the overall efficiency by summing instantaneous efficiency values weighted by a first set of coefficients if the most recent instantaneous efficiency value is above an instantaneous efficiency threshold. The method additionally includes determining the overall efficiency by summing instantaneous efficiency values weighted by a second set of coefficients if the most recent instantaneous efficiency value is equal to or below the instantaneous efficiency threshold. Furthermore, the method includes determining whether the overall efficiency has dropped below an overall efficiency threshold and reporting when the overall efficiency has dropped below the overall efficiency threshold. The second set of coefficients weighs the most recent instantaneous efficiency value more heavily than preceding instantaneous efficiency values as compared with the first set of coefficients. A system and a vehicle are also disclosed.
    • 评估选择性催化还原催化剂总效率的方法包括监测催化剂的瞬时效率。 该方法还包括如果最近的瞬时效率值高于瞬时效率阈值,则通过对由第一组系数加权的瞬时效率值求和来确定总体效率。 该方法还包括如果最近的瞬时效率值等于或低于瞬时效率阈值,则通过对由第二组系数加权的瞬时效率值求和来确定总体效率。 此外,该方法包括确定总体效率是否降低到总效率阈值以下,以及当整体效率降低到总效率阈值以下时报告。 与第一组系数相比,第二组系数比先前的瞬时效率值更重要地计算最近的瞬时效率值。 还公开了一种系统和车辆。
    • 45. 发明授权
    • Large leak diagnostic tool for a sealed fuel system in a vehicle
    • 用于车辆密封燃料系统的大型泄漏诊断工具
    • US08397552B2
    • 2013-03-19
    • US12895907
    • 2010-10-01
    • Robert JacksonWilliam R. CadmanJohn F. Van Gilder
    • Robert JacksonWilliam R. CadmanJohn F. Van Gilder
    • G01M3/34G01M3/04
    • G01M3/34B60K15/03519B60K2015/0319B60K2015/03514G01M3/025
    • A vehicle includes a sealed fuel system and a controller. The fuel system includes a fuel tank, a fuel cap, a control orifice, and an absolute pressure sensor. The controller associates a threshold large leak in the fuel system with a fuel cap sealing error. The controller detects completion of a prior refueling event, compares measurements from the pressure sensor to a reference vacuum across the control orifice to determine the presence of the threshold large leak, and sets a diagnostic code corresponding to the large leak only upon completion of the prior refueling event. A method for detecting the large leak includes detecting completion of the refueling event, comparing vacuum measurements from the absolute pressure sensor to a reference vacuum across the orifice to determine the presence of the large leak, and setting a diagnostic code corresponding to the large leak only upon completion of the prior refueling event.
    • 车辆包括密封燃料系统和控制器。 燃料系统包括燃料箱,燃料盖,控制孔和绝对压力传感器。 控制器将燃料系统中的阈值大泄漏与燃料盖密封误差相关联。 控制器检测先前的加油事件的完成,将来自压力传感器的测量值与控制孔口上的参考真空度进行比较,以确定阈值大泄漏的存在,并且仅在先前完成的情况下设置对应于大泄漏的诊断代码 加油事件 用于检测大泄漏的方法包括检测加油事件的完成,将来自绝对压力传感器的真空测量与穿过孔的参考真空进行比较,以确定是否存在大泄漏,并且设置对应于大泄漏的诊断代码 完成以前的加油事件。