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公开(公告)号：US20100095909A1
公开(公告)日：2010-04-22
申请号：US12582814
申请日：2009-10-21
申请人： George Lin , Gurpreet Gambhir , Zenebe Gete
发明人： George Lin , Gurpreet Gambhir , Zenebe Gete
CPC分类号： F01P11/16 , F01P7/165 , F01P2025/32 , F01P2060/04 , F01P2060/045 , F01P2060/08 , F01P2060/10 , G01M15/042
摘要： An onboard cooling system diagnostic strategy utilizes at least one temperature sensor fluidly positioned between an electronically controlled engine and a thermostat. The diagnostic algorithm operates by monitoring coolant temperature during engine startup. By comparing the actual coolant temperature during engine start-up to a predicted coolant temperature that should occur if no cooling system error is present, a cooling system fault condition may be identified. If a cooling system fault is detected, the diagnostic logic may activate the engine cooling fan or intrusively open an electrically controlled thermostat while monitoring the coolant temperature response to the intrusive action. If there is a substantial change in coolant temperature responsive to the intrusive action, this phenomenon can be utilized to correctly distinguish between a thermostat failure and a vehicle configuration error corresponding to an overcooled vehicle. The present disclosure also can utilize a similar strategy to diagnose problems associated with other vehicle fluid coolers that exchange heat with ambient air moved by a circulation fan.
摘要翻译： 车载冷却系统诊断策略使用至少一个流体地定位在电子控制发动机和恒温器之间的温度传感器。 诊断算法通过在发动机起动期间监测冷却液温度来运行。 通过比较发动机起动时的实际冷却液温度与不存在冷却系统误差时应发生的预计冷却液温度，可以确定冷却系统故障状况。 如果检测到冷却系统故障，则诊断逻辑可以激活发动机冷却风扇或者在监控冷却剂温度对侵入动作的响应的同时静态地打开电控恒温器。 如果响应于侵入作用的冷却剂温度存在显着变化，则可以利用该现象来正确区分恒温器故障和对应于过冷车辆的车辆配置误差。 本公开还可以利用类似的策略来诊断与通过循环风扇移动的环境空气进行热交换的其它车辆流体冷却器相关联的问题。
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公开(公告)号：US09068502B2
公开(公告)日：2015-06-30
申请号：US13231106
申请日：2011-09-13
申请人： Gurpreet Gambhir , Rammohan Sankar , Travis Barnes , Zenebe Gete
发明人： Gurpreet Gambhir , Rammohan Sankar , Travis Barnes , Zenebe Gete
CPC分类号： F02B47/08 , F01N3/00 , F02D41/0072 , F02D2021/083 , F02M26/43 , G06F19/00 , Y02T10/121 , Y02T10/47
摘要： A system and method for measuring an EGR flow rate for an engine having an EGR valve with a selectable EGR valve position and a venturi sensor situated to take a differential pressure measurement relative to recirculated exhaust gas includes determining an EGR valve effective area based on the EGR valve position, determining a weighting factor based on the effective area, calculating a first EGR flow estimate based on the effective area, and calculating a second EGR flow estimate based on the differential pressure measurement of the venturi sensor. A final EGR flow rate is determined based on the weighting factor, the first EGR flow estimate, and the second EGR flow estimate.
摘要翻译： 一种用于测量具有具有可选EGR阀位置的EGR阀和相对于再循环废气进行差压测量的文氏管传感器的发动机的EGR流量的系统和方法包括基于EGR确定EGR阀有效面积 阀位置，基于有效面积确定加权因子，基于有效面积计算第一EGR流量估计，以及基于文丘里管传感器的差压测量来计算第二EGR流量估计。 基于加权因子，第一EGR流量估计和第二EGR流量估计来确定最终EGR流量。
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公开(公告)号：US20130061831A1
公开(公告)日：2013-03-14
申请号：US13231106
申请日：2011-09-13
申请人： GURPREET GAMBHIR , RAMMOHAN SANKAR , TRAVIS BARNES , ZENEBE GETE
发明人： GURPREET GAMBHIR , RAMMOHAN SANKAR , TRAVIS BARNES , ZENEBE GETE
CPC分类号： F02B47/08 , F01N3/00 , F02D41/0072 , F02D2021/083 , F02M26/43 , G06F19/00 , Y02T10/121 , Y02T10/47
摘要： A system and method for measuring an EGR flow rate for an engine having an EGR valve with a selectable EGR valve position and a venturi sensor situated to take a differential pressure measurement relative to recirculated exhaust gas includes determining an EGR valve effective area based on the EGR valve position, determining a weighting factor based on the effective area, calculating a first EGR flow estimate based on the effective area, and calculating a second EGR flow estimate based on the differential pressure measurement of the venturi sensor. A final EGR flow rate is determined based on the weighting factor, the first EGR flow estimate, and the second EGR flow estimate.
摘要翻译： 一种用于测量具有具有可选EGR阀位置的EGR阀和相对于再循环废气进行差压测量的文氏管传感器的发动机的EGR流量的系统和方法包括基于EGR确定EGR阀有效面积 阀位置，基于有效面积确定加权因子，基于有效面积计算第一EGR流量估计，以及基于文丘里管传感器的差压测量来计算第二EGR流量估计。 基于加权因子，第一EGR流量估计和第二EGR流量估计来确定最终EGR流量。
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公开(公告)号：US08370052B2
公开(公告)日：2013-02-05
申请号：US12582814
申请日：2009-10-21
申请人： George Lin , Gurpreet Gambhir , Zenebe Gete
发明人： George Lin , Gurpreet Gambhir , Zenebe Gete
CPC分类号： F01P11/16 , F01P7/165 , F01P2025/32 , F01P2060/04 , F01P2060/045 , F01P2060/08 , F01P2060/10 , G01M15/042
摘要： An onboard cooling system diagnostic strategy utilizes at least one temperature sensor fluidly positioned between an electronically controlled engine and a thermostat. The diagnostic algorithm operates by monitoring coolant temperature during engine startup. By comparing the actual coolant temperature during engine start-up to a predicted coolant temperature that should occur if no cooling system error is present, a cooling system fault condition may be identified. If a cooling system fault is detected, the diagnostic logic may activate the engine cooling fan or intrusively open an electrically controlled thermostat while monitoring the coolant temperature response to the intrusive action. If there is a substantial change in coolant temperature responsive to the intrusive action, this phenomenon can be utilized to correctly distinguish between a thermostat failure and a vehicle configuration error corresponding to an overcooled vehicle. The present disclosure also can utilize a similar strategy to diagnose problems associated with other vehicle fluid coolers that exchange heat with ambient air moved by a circulation fan.
摘要翻译： 车载冷却系统诊断策略使用至少一个流体地定位在电子控制发动机和恒温器之间的温度传感器。 诊断算法通过在发动机起动期间监测冷却液温度来运行。 通过比较发动机起动时的实际冷却液温度与不存在冷却系统误差时应发生的预计冷却液温度，可以确定冷却系统故障状况。 如果检测到冷却系统故障，则诊断逻辑可以激活发动机冷却风扇或者在监控冷却剂温度对侵入动作的响应的同时静态地打开电控恒温器。 如果响应于侵入作用的冷却剂温度存在显着变化，则可以利用该现象来正确区分恒温器故障和对应于过冷车辆的车辆配置误差。 本公开还可以利用类似的策略来诊断与通过循环风扇移动的环境空气进行热交换的其它车辆流体冷却器相关联的问题。
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