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    • 4. 发明授权
    • Apparatus for detecting fuel-vapor gas leaks, and vent valve apparatus applied to this apparatus
    • 用于检测燃料蒸汽气体泄漏的装置,以及应用于该装置的排气阀装置
    • US06986341B2
    • 2006-01-17
    • US10706089
    • 2003-11-13
    • Tateki MitaniSeiji TsutsuiShigeki KanamaruHiroshi Yoshioka
    • Tateki MitaniSeiji TsutsuiShigeki KanamaruHiroshi Yoshioka
    • F02M37/00B60K15/035
    • F02M25/0818Y10T137/86678Y10T137/87217
    • An apparatus for detecting fuel-vapor gas leaks that includes a jet pump (8) that introduces outside air into and pressurizes a vapor purge system including a fuel tank (1) by gasoline flow from a fuel pump (2); an internal pressure sensor (14) for measuring vapor purge system internal pressure, an open/close controllable reference orifice (21) that causes leakage through a reference leak hole; and a storage device for storing as an initial curve pressure changes during pressurization by the jet pump (8) for a predetermined time period, with the reference orifice (21) alone opened. The device can accurately detect leakage even while an internal combustion engine is running because it judges leak presence/absence by comparing a time series in a pressure curve obtained by jet pump (8) pressurization over the predetermined time period while idling with the vapor purge system completely shut-off, with a time series in the initial curve.
    • 一种用于检测燃料蒸汽气体泄漏的装置,包括:喷射泵(8),其通过来自燃料泵(2)的汽油流将外部空气引入包括燃料箱(1)的蒸汽吹扫系统并对其加压; 用于测量蒸汽吹扫系统内部压力的内部压力传感器(14),使得通过参考泄漏孔泄漏的打开/关闭可控参考孔(21); 以及存储装置,用于在喷射泵(8)加压预定时间段期间随着初始曲线压力的变化而存储,同时单独打开基准孔(21)。 通过比较在预定时间段内通过喷射泵(8)加压获得的压力曲线中的时间序列,同时与蒸气吹扫系统空转时,该装置可以准确地检测内燃机运行时的泄漏 完全关闭,在初始曲线中用时间序列。
    • 8. 发明申请
    • Transpired fuel gas leak detecting device
    • 燃料燃气泄漏检测装置
    • US20070044549A1
    • 2007-03-01
    • US10557425
    • 2005-02-10
    • Hiroshi YoshiokaTateki Mitani
    • Hiroshi YoshiokaTateki Mitani
    • G01M19/00
    • F02M25/0809
    • A leak detecting system for a transpiration purge system including a fuel tank 1 and a canister 13 includes a jet pump 8, which leads the atmosphere into the fuel tank 1 using a return flow of excess fuel of fuel pumped to an internal combustion engine, internal pressure measuring means 15, and fuel volume detecting means 18. After supplying the air from pressurizing means for a predetermined time, the leak detecting system judges that a leak is present when a holding pressure measurement value in a state in which the transpiration purge system is closed is lower than a decompression calculation value calculated from a pressurization measurement value, an air volume, and a leak hole diameter.
    • 用于包括燃料箱1和罐13的蒸腾吹扫系统的泄漏检测系统包括喷射泵8,该喷射泵8使用泵送到内燃机的多余燃料的回流将内部空气引导到燃料箱1中,内部 压力测量装置15和燃料量检测装置18。 在从加压装置供给预定时间的空气之后,当蒸发吹扫系统关闭的状态下的保持压力测量值低于从加压计算出的减压计算值时,泄漏检测系统判断存在泄漏 测量值,空气量和泄漏孔直径。
    • 10. 发明授权
    • Transpired fuel gas leak detecting device
    • 燃料燃气泄漏检测装置
    • US07313487B2
    • 2007-12-25
    • US10557425
    • 2005-02-10
    • Hiroshi YoshiokaTateki Mitani
    • Hiroshi YoshiokaTateki Mitani
    • G01L7/00
    • F02M25/0809
    • A leak detecting system for a transpiration purge system including a fuel tank 1 and a canister 13 includes a jet pump 8, which leads the atmosphere into the fuel tank 1 using a return flow of excess fuel of fuel pumped to an internal combustion engine, internal pressure measuring means 15, and fuel volume detecting means 18. After intaking air via pressurizing means for a predetermined time, the leak detecting system judges that a leak is present when a holding pressure measurement value in a state in which the transpiration purge system is closed is lower than a decompression calculation value calculated from a pressurization measurement value, an air volume, and a leak hole diameter.
    • 用于包括燃料箱1和罐13的蒸腾吹扫系统的泄漏检测系统包括喷射泵8,该喷射泵8使用泵送到内燃机的多余燃料的回流将内部空气引导到燃料箱1内部 压力测量装置15和燃料量检测装置18。 在通过加压装置通入预定时间后,当蒸发吹扫系统关闭的状态下的保持压力测量值低于从加压测量计算出的减压计算值时,泄漏检测系统判断存在泄漏 值,空气量和泄漏孔直径。