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公开(公告)号：US20130312716A1
公开(公告)日：2013-11-28
申请号：US13478219
申请日：2012-05-23
CPC分类号： F02D21/08 , F02M26/33 , Y02T10/121
摘要： An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An actual thermal effectiveness of the EGR heat exchanger for the present engine operating point is determined. A maximum heat transfer coefficient for the EGR side of the EGR heat exchanger is determined for the present engine operating point. The EGR heat exchanger is regenerated when the actual heat transfer coefficient differs from the maximum heat transfer coefficient for the present engine operating point.
摘要翻译： 内燃机配备有包括EGR热交换器的EGR系统。 一种用于监测EGR热交换器的方法，包括监测EGR热交换器的EGR气体入口温度，来自EGR热交换器的EGR气体出口温度，冷却剂温度和通过用于本发动机运行的EGR热交换器的质量EGR流量 点。 确定本发动机工作点的EGR热交换器的实际热效率。 对于本发动机工作点确定EGR热交换器的EGR侧的最大传热系数。 当实际传热系数与当前发动机工作点的最大传热系数不同时，再生EGR热交换器。
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公开(公告)号：US09109518B2
公开(公告)日：2015-08-18
申请号：US13478219
申请日：2012-05-23
CPC分类号： F02D21/08 , F02M26/33 , Y02T10/121
摘要： An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An actual thermal effectiveness of the EGR heat exchanger for the present engine operating point is determined. A maximum heat transfer coefficient for the EGR side of the EGR heat exchanger is determined for the present engine operating point. The EGR heat exchanger is regenerated when the actual heat transfer coefficient differs from the maximum heat transfer coefficient for the present engine operating point.
摘要翻译： 内燃机配备有包括EGR热交换器的EGR系统。 一种用于监测EGR热交换器的方法，包括监测EGR热交换器的EGR气体入口温度，来自EGR热交换器的EGR气体出口温度，冷却剂温度和通过用于本发动机运行的EGR热交换器的质量EGR流量 点。 确定本发动机工作点的EGR热交换器的实际热效率。 对于本发动机工作点确定EGR热交换器的EGR侧的最大传热系数。 当实际传热系数与当前发动机工作点的最大传热系数不同时，再生EGR热交换器。
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