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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：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：US07720594B2
公开(公告)日：2010-05-18
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：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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