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    System for diagnosing operation of a cooling system for an internal combustion engine
    1.
    发明授权
    System for diagnosing operation of a cooling system for an internal combustion engine 有权
    用于诊断用于内燃机的冷却系统的操作的系统

    公开(公告)号：US06925376B2

    公开(公告)日：2005-08-02

    申请号：US10404757

    申请日：2003-04-01

    申请人： Xiaoqiu Li ,  Todd C. Slater ,  Mark R. Stepper ,  Anthony J. Abbenante ,  Stephanie L. Goerges ,  Yue Yun Wang

    发明人： Xiaoqiu Li ,  Todd C. Slater ,  Mark R. Stepper ,  Anthony J. Abbenante ,  Stephanie L. Goerges ,  Yue Yun Wang

    IPC分类号： F01P11/14 ,  F01P11/16 ,  G60G7/70

    CPC分类号： F01P11/16 ,  F01P11/14 ,  F01P2023/00 ,  F01P2023/08 ,  F01P2025/08 ,  F01P2025/62 ,  F01P2031/00

    摘要： A system for diagnosing operation of a cooling system for an internal combustion engine includes a coolant temperature sensor producing a temperature signal corresponding to coolant fluid temperature, means for determining either an engine load or a throttle percentage, and a control computer configured to diagnose operation of the cooling system as a function of the temperature signal, either the engine load or throttle percentage, and a fuel delivery command for controllably supplying fuel to the engine. After expiration of a diagnostic period, the control computer diagnoses the cooling system as normally operating if the diagnostic period ended by the temperature signal meeting or exceeding a predefined temperature and if a total energy used by the engine during the diagnostic period is less than an estimated energy, and diagnoses the cooling system as failing if the total energy used during the diagnostic period otherwise meets or exceeds the estimated energy.

    摘要翻译： 用于诊断内燃机的冷却系统的操作的系统包括：冷却剂温度传感器，其产生对应于冷却剂流体温度的温度信号，用于确定发动机负载或节流百分比的装置;以及控制计算机， 作为温度信号的函数的冷却系统，发动机负载或节流百分比，以及用于可控地向发动机供应燃料的燃料输送命令。 在诊断期限结束后，如果诊断期间以温度信号满足或超过预定温度结束，则控制计算机将冷却系统诊断为正常运行，并且如果诊断期间发动机使用的总能量小于估计值 能量，并且如果在诊断期间使用的总能量否则满足或超过估计的能量，则将冷却系统诊断为故障。

    System for diagnosing EGR flow rate operation
    2.
    发明授权
    System for diagnosing EGR flow rate operation 有权
    用于诊断EGR流量运行的系统

    公开(公告)号：US06802302B1

    公开(公告)日：2004-10-12

    申请号：US10409307

    申请日：2003-04-08

    申请人： Xiaoqiu Li ,  Mark R. Stepper ,  Stephanie L. Goerges ,  Yue Yun Wang

    发明人： Xiaoqiu Li ,  Mark R. Stepper ,  Stephanie L. Goerges ,  Yue Yun Wang

    IPC分类号： F02M2507

    CPC分类号： F02D21/08 ,  F02B29/0406 ,  F02D41/0072 ,  F02M26/05 ,  F02M26/23 ,  F02M26/47 ,  F02M26/49 ,  Y02T10/47

    摘要： A system is disclosed for diagnosing EGR flow rate operation in an internal combustion engine includes an intake manifold and an exhaust manifold coupled to the engine and an EGR conduit for recirculating exhaust gas from the exhaust manifold to the intake manifold. Means are provided for determining an EGR fraction corresponding to a fractional amount of recirculated exhaust gas in a total air charge supplied to the intake manifold. A control computer is configured to continually accumulate at least one EGR fraction error sum as a function of the EGR fraction and a desired EGR fraction, and to diagnose EGR flow rate operation as a function of the accumulated value of the at least one EGR fraction error sum.

    摘要翻译： 公开了一种用于诊断内燃机中的EGR流量操作的系统，其包括联接到发动机的进气歧管和排气歧管以及用于将废气从排气歧管再循环到进气歧管的EGR导管。 提供了用于确定与供应到进气歧管的总空气气体中的再循环废气的分数量相对应的EGR分数的装置。 控制计算机被配置为连续累积作为EGR分数和期望EGR分数的函数的至少一个EGR分数误差和，并且作为至少一个EGR分数误差的累积值的函数来诊断EGR流量操作 和。