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1.发明申请METHOD OF DIAGNOSING SEVERAL SYSTEMS AND COMPONENTS BY CYCLING THE EGR VALVE 有权通过循环EGR阀诊断几个系统和组件的方法公开(公告)号：US20130068203A1
公开(公告)日：2013-03-21
申请号：US13236882
申请日：2011-09-20
IPC分类号： F02M25/07
CPC分类号： F02M26/49 , F02D41/1461 , F02M26/25
摘要： A method to operate an electronic controlled internal combustion engine to perform on board NOx emissions level diagnostics. In one embodiment, the method may include operating the engine to maintain a predetermined temperature for a predetermined period of time, determining whether the engine operating status is stable for one of cruise control, idle engine speed, engine torque, or high idle regeneration for a predetermined period of time, cycling the EGR valve between a first position for a predetermined period of time and then in a second position for a predetermined period of time, a determining a change in engine out NOx levels to determine whether an engine component or system is malfunctioning.
摘要翻译： 一种操作电子控制内燃机来执行船上NOx排放水平诊断的方法。 在一个实施例中，该方法可以包括操作发动机以在预定时间段内维持预定温度，确定发动机运行状态对于巡航控制，空转发动机转速，发动机扭矩或高空转再生是否稳定 在预定时间段内，在第一位置之间将EGR阀循环预定时间段，然后在第二位置中循环预定时间段;确定发动机输出NOx水平的变化，以确定发动机部件或系统是否是 故障。
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2.发明授权Method of diagnosing several systems and components by cycling the EGR valve 有权通过循环EGR阀诊断多个系统和部件的方法公开(公告)号：US08649961B2
公开(公告)日：2014-02-11
申请号：US13236882
申请日：2011-09-20
IPC分类号： G01M15/10
CPC分类号： F02M26/49 , F02D41/1461 , F02M26/25
摘要： A method to operate an electronic controlled internal combustion engine to perform on board NOx emissions level diagnostics. In one embodiment, the method may include operating the engine to maintain a predetermined temperature for a predetermined period of time, determining whether the engine operating status is stable for one of cruise control, idle engine speed, engine torque, or high idle regeneration for a predetermined period of time, cycling the EGR valve between a first position for a predetermined period of time and then in a second position for a predetermined period of time, a determining a change in engine out NOx levels to determine whether an engine component or system is malfunctioning.
摘要翻译： 一种操作电子控制内燃机来执行船上NOx排放水平诊断的方法。 在一个实施例中，该方法可以包括操作发动机以在预定时间段内维持预定温度，确定发动机运行状态对于巡航控制，空转发动机转速，发动机扭矩或高空转再生是否稳定 在预定时间段内，在第一位置之间将EGR阀循环预定时间段，然后在第二位置中循环预定时间段;确定发动机输出NOx水平的变化，以确定发动机部件或系统是否是 故障。
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