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公开(公告)号：US07401596B2
公开(公告)日：2008-07-22
申请号：US11655665
申请日：2007-01-19
CPC分类号： F02M61/167 , F02D41/2096 , F02D2041/2065 , F02D2200/0606 , F02M51/0603 , F02M63/0026 , F02M2200/8092 , H02N2/062
摘要： The invention relates to a method of estimating the temperature of a piezoelectric actuator body for controlling the operation of a fuel injector mounted within an engine housing and supplied with fuel from a high pressure fuel pump. The piezoelectric actuator body is housed within a volume of fuel. The method comprises determining a temperature (T—INJ IN, T—PUMP IN) of fuel upstream of the fuel volume, determining a temperature (T—CYL) of the engine housing, and estimating a temperature (T—STACK STEADY STATE; T—STACK DYNAMIC) of the piezoelectric actuator body based on the upstream temperature (T—INJ IN, T—PUMP IN) and the temperature (T—CYL) of the engine housing. By considering the heat transfer between the piezoelectric actuator body, the injector and fuel within the volume, and the heat transfer due to fuel flow through the volume for an injection, the temperature of the piezoelectric actuator body can be estimated by modelling or mapping.
摘要翻译： 本发明涉及一种估计压电致动器本体的温度的方法，用于控制安装在发动机壳体内并从高压燃料泵供给燃料的燃料喷射器的操作。 压电致动器主体容纳在一定体积的燃料中。 该方法包括确定在燃料体积上游的燃料的温度（T IN-INJ IN，T INMP IN IN），确定温度（T < / SUB>），并且基于上游温度来估计压电致动器主体的温度（TST-STACK STEADY STATE> TST-STACK DYNAMIC＆lt; / SUB>） 发动机壳体的温度（T-SUB-INJ IN），以及发动机壳体的温度（T-CYL ）。 通过考虑压电致动器本体，喷射器和体积内的燃料之间的热传递以及由于燃料流过用于喷射的体积的热传递，可以通过建模或映射来估计压电致动器主体的温度。
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公开(公告)号：US20070170814A1
公开(公告)日：2007-07-26
申请号：US11655665
申请日：2007-01-19
CPC分类号： F02M61/167 , F02D41/2096 , F02D2041/2065 , F02D2200/0606 , F02M51/0603 , F02M63/0026 , F02M2200/8092 , H02N2/062
摘要： The invention relates to a method of estimating the temperature of a piezoelectric actuator body for controlling the operation of a fuel injector mounted within an engine housing and supplied with fuel from a high pressure fuel pump. The piezoelectric actuator body is housed within a volume of fuel. The method comprises determining a temperature (T—INJ IN, T—PUMP IN) of fuel upstream of the fuel volume, determining a temperature (T—CYL) of the engine housing, and estimating a temperature (T—STACK STEADY STATE; T—STACK DYNAMIC) of the piezoelectric actuator body based on the upstream temperature (T—INJ IN, T—PUMP IN) and the temperature (T—CYL) of the engine housing. By considering the heat transfer between the piezoelectric actuator body, the injector and fuel within the volume, and the heat transfer due to fuel flow through the volume for an injection, the temperature of the piezoelectric actuator body can be estimated by modelling or mapping.
摘要翻译： 本发明涉及一种估计压电致动器本体的温度的方法，用于控制安装在发动机壳体内并从高压燃料泵供给燃料的燃料喷射器的操作。 压电致动器主体容纳在一定体积的燃料中。 该方法包括确定温度（T INJ IN > 确定燃料容积的上游的燃料的温度，以确定发动机壳体的温度（T ，并且估计温度（T 堆栈稳定状态 基于上游温度（T 2），压电致动器主体的T＆lt; SUB2＆gt; ）发动机壳体。 通过考虑压电致动器本体，喷射器和体积内的燃料之间的热传递以及由于燃料流过用于喷射的体积的热传递，可以通过建模或映射来估计压电致动器主体的温度。
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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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公开(公告)号：US20070273246A1
公开(公告)日：2007-11-29
申请号：US11805284
申请日：2007-05-22
申请人： Daniel J. Hopley , Stephen A. Noyce , Colin Almond
发明人： Daniel J. Hopley , Stephen A. Noyce , Colin Almond
CPC分类号： F02D41/2096
摘要： A method of operating a fuel injector having a piezoelectric actuator operable by applying a drive pulse thereto, wherein the drive pulse has a frequency domain signature. The method includes i) determining at least one resonant frequency of an injector installation in which the injector is received, in use, and ii) modifying the drive pulse such that a maximum of the frequency domain signature thereof is remote from the determined resonant frequency of the injector installation.
摘要翻译： 一种操作具有通过向其施加驱动脉冲可操作的压电致动器的燃料喷射器的方法，其中驱动脉冲具有频域特征。 该方法包括：i）确定在使用中接收注射器的喷射器装置的至少一个谐振频率，以及ii）修改驱动脉冲，使得其频域签名的最大值远离所确定的谐振频率 注射器安装。
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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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