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公开(公告)号：US08193816B2
公开(公告)日：2012-06-05
申请号：US12291516
申请日：2008-11-07
CPC分类号： F02D41/2096 , F02D41/22
摘要： A method and apparatus for detecting faults in an injector arrangement is described. The injector arrangement comprises a plurality of piezoelectric injectors that are located in parallel branches of an injector bank circuit of an injector drive circuit. Each branch of the injector bank circuit comprises a high side isolation switch. The high side isolation switches are each operable to enable an associated piezoelectric injector in the injector bank circuit when closed, and disable the associated piezoelectric injector in the injector bank circuit when open. The fault detection method comprises the steps of operating the high side isolation switches so as to enable one of the piezoelectric injectors and disable the other piezoelectric injector(s), and performing diagnostics to detect the presence or absence of faults on the enabled piezoelectric injector.
摘要翻译： 描述了一种用于检测喷射装置中的故障的方法和装置。 喷射器装置包括位于喷射器驱动电路的喷射器组电路的平行分支中的多个压电喷射器。 注射器组电路的每个分支包括高侧隔离开关。 高侧隔离开关各自可操作以使得在关闭时能够使注入器组电路中相关联的压电注入器处于关闭状态，并且当打开时禁用注入器组电路中的相关压电注射器。 该故障检测方法包括以下步骤：操作高侧隔离开关，以便能够使一个压电喷射器和其它压电喷射器中的一个，并执行诊断以检测启用的压电喷射器上是否存在故障。
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公开(公告)号：US07624721B2
公开(公告)日：2009-12-01
申请号：US12358298
申请日：2009-01-23
IPC分类号： F02M51/00
CPC分类号： F02D41/2096 , F02D41/221 , F02D2041/2048 , F02D2041/2058 , F02D2041/2093
摘要： The invention relates to a drive circuit for an injector arrangement comprising a first fuel injector in parallel with a capacitive component. The drive circuit comprises: a selector means and diagnostic means. The selector means is operable to select the first fuel injector and/or the capacitive component into the drive circuit and to deselect the first fuel injector and/or the capacitive component from the drive circuit. When the capacitive component is selected and the first fuel injector is deselected, the diagnostic means is operable to sense a current through the first fuel injector. When the sensed current is at variance from a first threshold current the diagnostic means is operable to provide a first signal on detection of a stack terminal short circuit fault associated with the first fuel injector. The capacitive component may be a second fuel injector.
摘要翻译： 本发明涉及一种用于喷射器装置的驱动电路，包括与电容部件并联的第一燃料喷射器。 驱动电路包括：选择器装置和诊断装置。 选择器装置可操作以将第一燃料喷射器和/或电容部件选择到驱动电路中，并且从驱动电路中取消选择第一燃料喷射器和/或电容部件。 当选择电容性部件并且取消选择第一燃料喷射器时，诊断装置可操作以感测通过第一燃料喷射器的电流。 当感测到的电流与第一阈值电流不同时，诊断装置可操作以在检测到与第一燃料喷射器相关联的堆叠端子短路故障时提供第一信号。 电容部件可以是第二燃料喷射器。
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公开(公告)号：US20080319699A1
公开(公告)日：2008-12-25
申请号：US12157543
申请日：2008-06-11
申请人： Louisa J. Perryman
发明人： Louisa J. Perryman
IPC分类号： G01R31/308
CPC分类号： F02D41/2096 , F02D41/062 , F02D41/221 , F02D2041/2006 , F02D2041/2051 , F02D2041/2058 , F02D2041/2072 , F02D2041/2093 , F02M51/0603
摘要： A fault detection method for detecting short circuit faults in an injector arrangement at engine start-up. The injector arrangement comprises one or more piezoelectric fuel injectors, which are connected in a drive circuit. In one aspect of the invention, the potential at a bias point in the drive circuit is determined and compared with a predicted voltage. A short circuit fault signal is generated if the potential at the bias point is not within a predetermined tolerance voltage of the predicted voltage. In another aspect of the invention, a first charge pulse is applied to the injectors to charge the injectors. A discharge current path is provided during a delay period following the first charge pulse by closing a discharge switch. A faulty injector will discharge through the discharge current path during the delay period. A second charge pulse is applied to the injectors following the delay period. Current flow is sensed during the second charge pulse, and a short circuit warning signal is generated if the current flow during the second charge pulse exceeds a predetermined threshold current.
摘要翻译： 一种用于检测发动机起动时喷射器装置中的短路故障的故障检测方法。 喷射器装置包括连接在驱动电路中的一个或多个压电燃料喷射器。 在本发明的一个方面中，确定驱动电路中的偏置点处的电位并将其与预测电压进行比较。 如果偏置点处的电位不在预测电压的预定公差电压内，则产生短路故障信号。 在本发明的另一方面，第一充电脉冲被施加到喷射器以对喷射器充电。 通过关闭放电开关，在第一充电脉冲之后的延迟时段期间提供放电电流路径。 在延迟期间，故障的进样器将通过放电电流路径放电。 在延迟周期之后，向喷射器施加第二充电脉冲。 在第二充电脉冲期间感测电流，并且如果在第二充电脉冲期间的电流超过预定阈值电流，则产生短路警告信号。
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公开(公告)号：US20090314073A1
公开(公告)日：2009-12-24
申请号：US12427089
申请日：2009-04-21
IPC分类号： G01M15/04
CPC分类号： F02D41/221 , F02D41/2096 , F02D2041/2051 , F02D2041/2058 , F02D2041/2072 , F02D2041/2082 , F02D2041/2093 , F02M2200/21
摘要： A method of identifying an individual short circuit fuel injector, within an injector bank of an engine comprising a plurality of fuel injectors. Each fuel injector has a piezoelectric actuator and an associated injector select switch forming part of an injector drive circuit. The method comprises: (i) charging all of the piezoelectric actuators of the plurality of fuel injectors within the injector bank during a charge phase; (ii) at the end of the charge phase waiting for a delay period; and (iii) subsequently closing an injector select switch of a fuel injector to select said fuel injector. The method further comprises: (iv) determining a stack voltage present on terminals of the piezoelectric actuator of the selected fuel injector and storing the stack voltage in a data store. The stack voltage is indicative of an amount of charge present on the selected injector at the end of the delay period. The method further comprises (v) repeating steps (i) to (iv) for each fuel injector in the injector bank in turn; and (vi) identifying the individual short circuit fuel injector as being the injector which has discharged beyond a predetermined voltage drop limit during the delay period. The method also comprises generating a short circuit fault signal for the identified fuel injector.
摘要翻译： 一种在包括多个燃料喷射器的发动机的喷射器组内识别单个短路燃料喷射器的方法。 每个燃料喷射器具有形成喷射器驱动电路的一部分的压电致动器和相关联的喷射器选择开关。 该方法包括：（i）在充电阶段期间对喷射器组内的多个燃料喷射器的所有压电致动器进行充电; （ii）在充电期结束时等待延迟期; 和（iii）随后关闭燃料喷射器的喷射器选择开关以选择所述燃料喷射器。 该方法还包括：（iv）确定存在于所选择的燃料喷射器的压电致动器的端子上的堆叠电压并将堆叠电压存储在数据存储器中。 堆叠电压表示在延迟周期结束时在所选择的喷射器上存在的电荷量。 该方法还包括（v）依次对喷射器组中的每个燃料喷射器重复步骤（i）至（iv）; 以及（vi）将所述单个短路燃料喷射器识别为在所述延迟期间已经放电超过预定电压下降极限的所述喷射器。 该方法还包括产生用于识别的燃料喷射器的短路故障信号。
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公开(公告)号：US20090140747A1
公开(公告)日：2009-06-04
申请号：US12291516
申请日：2008-11-07
IPC分类号： G01R31/02
CPC分类号： F02D41/2096 , F02D41/22
摘要： A method and apparatus for detecting faults in an injector arrangement is described. The injector arrangement comprises a plurality of piezoelectric injectors that are located in parallel branches of an injector bank circuit of an injector drive circuit. Each branch of the injector bank circuit comprises a high side isolation switch. The high side isolation switches are each operable to enable an associated piezoelectric injector in the injector bank circuit when closed, and disable the associated piezoelectric injector in the injector bank circuit when open. The fault detection method comprises the steps of operating the high side isolation switches so as to enable one of the piezoelectric injectors and disable the other piezoelectric injector(s), and performing diagnostics to detect the presence or absence of faults on the enabled piezoelectric injector.
摘要翻译： 描述了一种用于检测喷射装置中的故障的方法和装置。 喷射器装置包括位于喷射器驱动电路的喷射器组电路的平行分支中的多个压电喷射器。 注射器组电路的每个分支包括高侧隔离开关。 高侧隔离开关各自可操作以使得在关闭时能够使注入器组电路中相关联的压电注入器处于关闭状态，并且当打开时禁用注入器组电路中的相关压电注射器。 该故障检测方法包括以下步骤：操作高侧隔离开关，以便能够使一个压电喷射器和其它压电喷射器中的一个，并执行诊断以检测启用的压电喷射器上是否存在故障。
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公开(公告)号：US07497204B2
公开(公告)日：2009-03-03
申请号：US11804839
申请日：2007-05-21
IPC分类号： F02M51/00
CPC分类号： F02D41/2096 , F02D41/221 , F02D2041/2048 , F02D2041/2058 , F02D2041/2093
摘要： The invention relates to a drive circuit for an injector arrangement comprising a first fuel injector in parallel with a capacitive component. The drive circuit comprises: a selector means (SQ1, SQ2) and diagnostic means. The selector means (SQ1, SQ2) is operable to select the first fuel injector and/or the capacitive component into the drive circuit and to deselect the first fuel injector and/or the capacitive component from the drive circuit. When the capacitive component is selected and the first fuel injector is deselected, the diagnostic means is operable to sense a current (Isense) through the first fuel injector. When the sensed current (Isense) is at variance from a first threshold current (Ilimit) the diagnostic means is operable to provide a first signal on detection of a stack terminal short circuit fault associated with the first fuel injector. The capacitive component may be a second fuel injector.
摘要翻译： 本发明涉及一种用于喷射器装置的驱动电路，包括与电容部件并联的第一燃料喷射器。 驱动电路包括：选择器装置（SQ1，SQ2）和诊断装置。 选择器装置（SQ1，SQ2）可操作以将第一燃料喷射器和/或电容部件选择到驱动电路中，并且从驱动电路中取消选择第一燃料喷射器和/或电容部件。 当选择电容性部件并且取消选择第一燃料喷射器时，诊断装置可操作以感测通过第一燃料喷射器的电流（Isense）。 当感测到的电流（Isense）与第一阈值电流（Ilimit）不同时，诊断装置可操作以在检测到与第一燃料喷射器相关联的堆叠端子短路故障时提供第一信号。 电容部件可以是第二燃料喷射器。
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公开(公告)号：US20080129305A1
公开(公告)日：2008-06-05
申请号：US11998012
申请日：2007-11-28
CPC分类号： F02D41/2096 , F02D41/221 , F02D2041/2058 , F02D2041/2089 , F02D2041/2093
摘要： A method of detecting faults in an injector arrangement in an engine. The injector arrangement comprises at least one fuel injector having a piezoelectric actuator, and the method comprises: charging the piezoelectric actuator during a charge phase (tC); attempting to recharge the piezoelectric actuator during a test phase (tT) which commences after a time interval (Δt) following the end of the charge phase (tC); sensing a current (IS) that flows through the piezoelectric actuator during the test phase (tT); and generating a short circuit fault signal if the sensed current (IS) reaches a first predetermined threshold current (ISC) which is indicative of a short circuit in the piezoelectric actuator.
摘要翻译： 一种检测发动机中喷射器装置中的故障的方法。 喷射器装置包括至少一个具有压电致动器的燃料喷射器，并且该方法包括：在充电阶段（t> C）期间对压电致动器进行充电; 在在充电阶段（t> C>）结束之后的时间间隔（Deltat）之后开始的测试阶段期间尝试对压电致动器进行再充电; 感测在测试阶段（t T T S）期间流过压电致动器的电流（I SUB> S）; 以及如果感测到的电流（I SUB S S S）达到表示压电致动器中的短路的第一预定阈值电流（I SUB SC），则产生短路故障信号 。
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公开(公告)号：US08248074B2
公开(公告)日：2012-08-21
申请号：US12287724
申请日：2008-10-10
IPC分类号： G01M15/00
CPC分类号： F02D41/2096 , F02D41/062 , F02D41/221 , F02D2041/2003 , F02D2041/2006 , F02D2041/2051 , F02D2041/2058 , F02D2041/2072 , F02D2041/2082 , F02D2041/2089 , F02D2041/2093 , F02D2200/0602 , F02M51/0603
摘要： A fault detection method is provided for detecting faults in an injector arrangement. The injector arrangement includes one or more piezoelectric fuel injectors connected in an injector drive circuit, and the injector drive circuit is arranged to control operation of the one or more piezoelectric fuel injectors. The fault detection method includes determining a sample voltage at a sample point in the injector drive circuit at a first sample time. The sample voltage is the voltage on an injector or is related to the voltage on an injector. The method further includes calculating a range of predicted voltages expected at the sample point at a second sample time following the first sample time, and determining the sample voltage at the sample point at the second sample time. The presence of a fault is detected if the sample voltage determined at the sample point at the second sample time is not within the range of predicted voltages.
摘要翻译： 提供一种用于检测喷射器装置中的故障的故障检测方法。 喷射器装置包括连接在喷射器驱动电路中的一个或多个压电燃料喷射器，并且喷射器驱动电路被布置成控制一个或多个压电燃料喷射器的操作。 所述故障检测方法包括在第一采样时间确定所述喷射器驱动电路中的采样点处的采样电压。 样品电压是注射器上的电压或与注射器上的电压有关。 该方法还包括计算在第一采样时间之后的第二采样时间期望在采样点处的预测电压的范围，以及在第二采样时间确定采样点处的采样电压。 如果在第二采样时间在采样点确定的采样电压不在预测电压的范围内，则检测到故障的存在。
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公开(公告)号：US07966871B2
公开(公告)日：2011-06-28
申请号：US12427089
申请日：2009-04-21
IPC分类号： G01M15/04
CPC分类号： F02D41/221 , F02D41/2096 , F02D2041/2051 , F02D2041/2058 , F02D2041/2072 , F02D2041/2082 , F02D2041/2093 , F02M2200/21
摘要： A method of identifying an individual short circuit fuel injector, within an injector bank of an engine comprising a plurality of fuel injectors. Each fuel injector has a piezoelectric actuator and an associated injector select switch forming part of an injector drive circuit. The method comprises: (i) charging all of the piezoelectric actuators of the plurality of fuel injectors within the injector bank during a charge phase; (ii) at the end of the charge phase waiting for a delay period; and (iii) subsequently closing an injector select switch of a fuel injector to select said fuel injector. The method further comprises: (iv) determining a stack voltage present on terminals of the piezoelectric actuator of the selected fuel injector and storing the stack voltage in a data store. The stack voltage is indicative of an amount of charge present on the selected injector at the end of the delay period. The method further comprises (v) repeating steps (i) to (iv) for each fuel injector in the injector bank in turn; and (vi) identifying the individual short circuit fuel injector as being the injector which has discharged beyond a predetermined voltage drop limit during the delay period. The method also comprises generating a short circuit fault signal for the identified fuel injector.
摘要翻译： 一种在包括多个燃料喷射器的发动机的喷射器组内识别单个短路燃料喷射器的方法。 每个燃料喷射器具有形成喷射器驱动电路的一部分的压电致动器和相关联的喷射器选择开关。 该方法包括：（i）在充电阶段期间对喷射器组内的多个燃料喷射器的所有压电致动器进行充电; （ii）在充电期结束时等待延迟期; 和（iii）随后关闭燃料喷射器的喷射器选择开关以选择所述燃料喷射器。 该方法还包括：（iv）确定存在于所选择的燃料喷射器的压电致动器的端子上的堆叠电压并将堆叠电压存储在数据存储器中。 堆叠电压表示在延迟周期结束时在所选择的喷射器上存在的电荷量。 该方法还包括（v）依次对喷射器组中的每个燃料喷射器重复步骤（i）至（iv）; 以及（vi）将所述单个短路燃料喷射器识别为在所述延迟期间已经放电超过预定电压下降极限的所述喷射器。 该方法还包括产生用于识别的燃料喷射器的短路故障信号。
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公开(公告)号：US07822537B2
公开(公告)日：2010-10-26
申请号：US11998012
申请日：2007-11-28
CPC分类号： F02D41/2096 , F02D41/221 , F02D2041/2058 , F02D2041/2089 , F02D2041/2093
摘要： A method of detecting faults in an injector arrangement in an engine. The injector arrangement comprises at least one fuel injector having a piezoelectric actuator, and the method comprises: charging the piezoelectric actuator during a charge phase (tC); attempting to recharge the piezoelectric actuator during a test phase (tT) which commences after a time interval (Δt) following the end of the charge phase (tC); sensing a current (IS) that flows through the piezoelectric actuator during the test phase (tT); and generating a short circuit fault signal if the sensed current (IS) reaches a first predetermined threshold current (ISC) which is indicative of a short circuit in the piezoelectric actuator.
摘要翻译： 一种检测发动机中喷射器装置中的故障的方法。 喷射器装置包括至少一个具有压电致动器的燃料喷射器，并且该方法包括：在充电阶段（tC）期间对压电致动器进行充电; 试图在电荷阶段（tC）结束后的时间间隔（＆Dgr; t）之后开始的测试阶段（tT）期间对压电致动器进行充电; 感测在测试阶段（tT）期间流过压电致动器的电流（IS）; 以及如果感测到的电流（IS）达到表示压电致动器中的短路的第一预定阈值电流（ISC），则产生短路故障信号。
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