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公开(公告)号：US20090234558A1
公开(公告)日：2009-09-17
申请号：US12226252
申请日：2007-04-12
CPC分类号： F02D41/2096 , F02D2041/2055 , F02D2041/2058
摘要： A fuel injector control method comprises determining a required separation time between a termination of an on signal associated with a first injection event and an initiation of an on signal associated with a second injection event. The method comprises calculating an overlap time between the separation time and the time to charge the piezoelectric stack to a first level; dividing the overlap time into first and second time periods as a function of the charge and discharge currents; applying the charge current to the piezoelectric stack for a charge time; and applying the discharge current to the piezoelectric stack for a discharge time so as to discharge the stack to a second level, wherein the discharge time is calculated on the basis of the second time period of the overlap time. Thus, first and second injection events are merged in a pulse mode of operation.
摘要翻译： 燃料喷射器控制方法包括确定在与第一喷射事件相关联的开启信号的终止与与第二喷射事件相关联的开启信号的启动之间所需的间隔时间。 该方法包括计算分离时间与将压电堆叠充电到第一电平的时间之间的重叠时间; 将重叠时间分为第一和第二时间段作为充放电电流的函数; 将充电电流施加到压电叠层充电时间; 以及将放电电流施加到所述压电堆叠放电时间，以将所述堆放电到第二电平，其中基于所述重叠时间的第二时间段计算所述放电时间。 因此，第一和第二注射事件以脉冲操作模式合并。
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公开(公告)号：US20090133671A1
公开(公告)日：2009-05-28
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：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：US20090093944A1
公开(公告)日：2009-04-09
申请号：US12231815
申请日：2008-09-05
IPC分类号： F02D41/30
CPC分类号： F02D41/2096 , F02D41/221 , F02D41/2422 , F02D41/402 , F02D2041/2006 , F02D2041/2027 , F02D2041/2058 , F02D2200/503 , Y02T10/44
摘要： A method and apparatus for controlling fuel injection in an engine is described. The apparatus comprises at least one fuel injector which is connected in an injector drive circuit powered by a power source. The method comprises determining an injection event sequence of the at least one fuel injector based on at least one engine operating parameter, determining a magnitude of a load parameter of the power source, comparing the magnitude to a predetermined threshold level for the load parameter, and determining a modified injection event sequence in the event that the magnitude is substantially equal to or greater than the predetermined threshold level.
摘要翻译： 描述了用于控制发动机中的燃料喷射的方法和装置。 该装置包括至少一个燃料喷射器，其连接在由电源供电的喷射器驱动电路中。 所述方法包括基于至少一个发动机操作参数确定所述至少一个燃料喷射器的喷射事件序列，确定所述电源的负载参数的大小，将所述大小与所述负载参数的预定阈值水平进行比较，以及 在幅度基本上等于或大于预定阈值水平的情况下，确定修改的喷射事件序列。
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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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