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    • 4. 发明授权
    • Low purge flow vehicle diagnostic tool
    • 低清洗流量车辆诊断工具
    • US08630786B2
    • 2014-01-14
    • US12823281
    • 2010-06-25
    • Robert JacksonWilliam R. CadmanKurt D. McLainDavid Edward Prout
    • Robert JacksonWilliam R. CadmanKurt D. McLainDavid Edward Prout
    • F02M33/02
    • F02M25/0809F02D41/0037
    • A vehicle includes an engine, a sealed fuel system having a fuel tank, a canister for storing fuel vapor, a vapor circuit external to the fuel tank, and a control valve. The vapor circuit includes an absolute pressure sensor and a switching valve connecting the fuel tank to the control valve. A controller evaluates or diagnoses a vapor purge function of the sealed fuel system using vacuum measurements from the absolute pressure sensor, executing or diagnosing only when the engine is running, purge is enabled, and the pump is off. The controller diagnoses the vapor purge function by comparing the vacuum measurements to a threshold vacuum. An apparatus includes the vapor circuit and controller. A method for diagnosing the vapor purge function includes actuating the switching valve, measuring a vacuum in the system using the absolute pressure sensor, and comparing the measured vacuum to a threshold vacuum.
    • 车辆包括发动机,具有燃料箱的密封燃料系统,用于储存燃料蒸气的罐,在燃料箱外部的蒸气回路和控制阀。 蒸汽回路包括绝对压力传感器和将燃料箱连接到控制阀的切换阀。 控制器使用来自绝对压力传感器的真空测量来评估或诊断密封燃料系统的蒸汽吹扫功能,仅在发动机运行,清洗启用并且泵关闭时执行或诊断。 控制器通过将真空测量值与阈值真空进行比较来诊断蒸气吹扫功能。 一种装置包括蒸汽回路和控制器。 用于诊断蒸气吹扫功能的方法包括致动切换阀,使用绝对压力传感器测量系统中的真空,并将测量的真空与阈值真空进行比较。
    • 5. 发明申请
    • LARGE LEAK DIAGNOSTIC TOOL FOR A SEALED FUEL SYSTEM IN A VEHICLE
    • 用于汽车密封燃料系统的大型泄漏诊断工具
    • US20120079873A1
    • 2012-04-05
    • US12895907
    • 2010-10-01
    • Robert JacksonWilliam R. CadmanJohn F. Van Gilder
    • Robert JacksonWilliam R. CadmanJohn F. Van Gilder
    • G01M3/34
    • 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。 控制器检测到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。
    • 6. 发明申请
    • LOW PURGE FLOW VEHICLE DIAGNOSTIC TOOL
    • 低流量车辆诊断工具
    • US20110315127A1
    • 2011-12-29
    • US12823281
    • 2010-06-25
    • Robert JacksonWilliam R. CadmanKurt D. McLainDavid Edward Prout
    • Robert JacksonWilliam R. CadmanKurt D. McLainDavid Edward Prout
    • F02M33/02
    • F02M25/0809F02D41/0037
    • A vehicle includes an engine, a sealed fuel system having a fuel tank, a canister for storing fuel vapor, a vapor circuit external to the fuel tank, and a control valve. The vapor circuit includes an absolute pressure sensor and a switching valve connecting the fuel tank to the control valve. A controller evaluates or diagnoses a vapor purge function of the sealed fuel system using vacuum measurements from the absolute pressure sensor, executing or diagnosing only when the engine is running, purge is enabled, and the pump is off. The controller diagnoses the vapor purge function by comparing the vacuum measurements to a threshold vacuum. An apparatus includes the vapor circuit and controller. A method for diagnosing the vapor purge function includes actuating the switching valve, measuring a vacuum in the system using the absolute pressure sensor, and comparing the measured vacuum to a threshold vacuum.
    • 车辆包括发动机,具有燃料箱的密封燃料系统,用于储存燃料蒸气的罐,在燃料箱外部的蒸气回路和控制阀。 蒸汽回路包括绝对压力传感器和将燃料箱连接到控制阀的切换阀。 控制器使用来自绝对压力传感器的真空测量来评估或诊断密封燃料系统的蒸汽吹扫功能,仅在发动机运行,清洗启用和泵关闭时执行或诊断。 控制器通过将真空测量值与阈值真空进行比较来诊断蒸气吹扫功能。 一种装置包括蒸汽回路和控制器。 用于诊断蒸气吹扫功能的方法包括致动切换阀,使用绝对压力传感器测量系统中的真空,并将测量的真空与阈值真空进行比较。
    • 8. 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。