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公开(公告)号：US08554454B2
公开(公告)日：2013-10-08
申请号：US13112921
申请日：2011-05-20
CPC分类号： F02M65/003 , F02M63/0225 , F02M65/001
摘要： A method for testing a fuel injector including providing an engine with a common rail fuel injection system having one or more fuel injectors; operating the engine at a selected set of operating conditions; conducting a motoring event; allowing a first settling duration; measuring a first rail pressure; operating a first selected injector including operating the first selected injector singly in response to a selected fuel quantity, a selected number of combustion cycles, and a selected number of injections per combustion cycle; allowing a second settling duration; measuring a second rail pressure; calculating a pressure difference value in response to the first rail pressure and the second rail pressure; inferring an amount of fuel delivered by the first selected injector in response to the pressure difference value; and evaluating a first performance factor of the first selected injector in response to the amount of fuel delivered.
摘要翻译： 一种用于测试燃料喷射器的方法，包括向发动机提供具有一个或多个燃料喷射器的共轨燃料喷射系统; 在选定的一组操作条件下操作发动机; 进行驾驶事件 允许第一个建立时间; 测量第一轨压力; 操作第一选择的喷射器，包括响应于所选择的燃料量，所选数量的燃烧循环和每个燃烧循环的选定数量的喷射单独地操作第一选定的喷射器; 允许第二个建立时间; 测量第二轨压力; 响应于所述第一轨道压力和所述第二轨道压力计算压力差值; 推断由所述压力差值响应于所述第一选择的喷射器所输送的燃料量; 以及响应于所输送的燃料量来评估所述第一选择的喷射器的第一性能因子。
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2.发明授权Apparatus and method for diagnosing erratic pressure sensor operation in a fuel system of an internal combustion engine 失效用于诊断内燃机的燃料系统中不稳定的压力传感器操作的装置和方法
公开(公告)号：US6053147A
公开(公告)日：2000-04-25
申请号：US33378
申请日：1998-03-02
申请人： Rodney J. Hemmerlein , Stephen West
发明人： Rodney J. Hemmerlein , Stephen West
CPC分类号： F02D41/3845 , F02D41/222 , F02M63/0225 , F02M65/00 , F02M65/003 , F02D2041/1432 , F02D2041/223
摘要： A fuel system includes a pair of electronically controllable high pressure fuel pumps operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel accumulator having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The accumulator pressure signal is processed in accordance with the present invention for diagnosing erratic pressure sensor failures. The control computer is operable to compute error pressure values based on differences between peak accumulator pressure values and a target pressure value, and compute pressure error variance values based on subsets of the pressure error values. A fault code is logged and a limp home fueling algorithm is executed if a predefined number of variance values exceed a variance threshold.
摘要翻译： 燃料系统包括一对可电控制的高压燃料泵，其可操作以将来自低压燃料源的高压燃料供给到具有与其相关联的压力传感器的高压燃料蓄能器。 燃料收集室供应电子可控阀，可操作以将高压燃料分配到向多个燃料喷射器供应燃料的燃料分配单元。 提供控制计算机，用于响应于由压力传感器提供的所需的加油，发动机转速和燃料压力来控制高压燃料泵和阀。 根据本发明处理蓄能器压力信号用于诊断不稳定的压力传感器故障。 控制计算机可操作地基于峰值累加器压力值和目标压力值之间的差异来计算误差压力值，并且基于压力误差值的子集计算压力误差方差值。 记录故障代码，如果预定数量的方差值超过方差阈值，则执行跛行家庭加油算法。
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公开(公告)号：US20110313639A1
公开(公告)日：2011-12-22
申请号：US13112921
申请日：2011-05-20
CPC分类号： F02M65/003 , F02M63/0225 , F02M65/001
摘要： A method for testing a fuel injector including providing an engine with a common rail fuel injection system having one or more fuel injectors; operating the engine at a selected set of operating conditions; conducting a motoring event; allowing a first settling duration; measuring a first rail pressure; operating a first selected injector including operating the first selected injector singly in response to a selected fuel quantity, a selected number of combustion cycles, and a selected number of injections per combustion cycle; allowing a second settling duration; measuring a second rail pressure; calculating a pressure difference value in response to the first rail pressure and the second rail pressure; inferring an amount of fuel delivered by the first selected injector in response to the pressure difference value; and evaluating a first performance factor of the first selected injector in response to the amount of fuel delivered.
摘要翻译： 一种用于测试燃料喷射器的方法，包括向发动机提供具有一个或多个燃料喷射器的共轨燃料喷射系统; 在选定的一组操作条件下操作发动机; 进行驾驶事件 允许第一个建立时间; 测量第一轨压力; 操作第一选择的喷射器，包括响应于所选择的燃料量，所选数量的燃烧循环和每个燃烧循环的选定数量的喷射单独地操作第一选定的喷射器; 允许第二个建立时间; 测量第二轨压力; 响应于所述第一轨道压力和所述第二轨道压力计算压力差值; 推断由所述压力差值响应于所述第一选择的喷射器所输送的燃料量; 以及响应于所输送的燃料量来评估所述第一选择的喷射器的第一性能因子。
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4.发明授权Apparatus and method for diagnosing erratic pressure sensor operation in a fuel system of an internal combustion engine 有权用于诊断内燃机的燃料系统中不稳定的压力传感器操作的装置和方法公开(公告)号：US06293251B1
公开(公告)日：2001-09-25
申请号：US09357359
申请日：1999-07-20
申请人： Rodney J. Hemmerlein , Stephen West
发明人： Rodney J. Hemmerlein , Stephen West
IPC分类号： F02M700
CPC分类号： F02D41/3836 , F02D41/222 , F02D41/3845 , F02D2041/223 , F02D2041/227 , F02M63/0225
摘要： A fuel system includes a pair of electronically controllable high pressure fuel pumps operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel accumulator having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The accumulator pressure signal is processed in accordance with the present invention for diagnosing erratic pressure sensor failures. The control computer is operable to compute error pressure values based on differences between peak accumulator pressure values and a target pressure value, and compute pressure error variance values based on subsets of the pressure error values. A fault code is logged and a limp home fueling algorithm is executed if a predefined number of variance values exceed a variance threshold.
摘要翻译： 燃料系统包括一对可电控制的高压燃料泵，其可操作以将来自低压燃料源的高压燃料供给到具有与其相关联的压力传感器的高压燃料蓄能器。 燃料收集室供应电子可控阀，可操作以将高压燃料分配到向多个燃料喷射器供应燃料的燃料分配单元。 提供控制计算机，用于响应于由压力传感器提供的所需的加油，发动机转速和燃料压力来控制高压燃料泵和阀。 根据本发明处理蓄能器压力信号用于诊断不稳定的压力传感器故障。 控制计算机可操作地基于峰值累加器压力值和目标压力值之间的差异来计算误差压力值，并且基于压力误差值的子集计算压力误差方差值。 记录故障代码，如果预定数量的方差值超过方差阈值，则执行跛行家庭加油算法。
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