Catalyst deterioration diagnosis system and method for internal combustion engine
    51.
    发明授权
    Catalyst deterioration diagnosis system and method for internal combustion engine 有权
    催化剂劣化诊断系统和内燃机方法

    公开(公告)号:US08490385B2

    公开(公告)日:2013-07-23

    申请号:US13055062

    申请日:2009-07-22

    IPC分类号: F01N3/00 F01N3/10

    摘要: A catalyst deterioration diagnosis system performs a diagnosis of deterioration of the oxidation catalyst based on a high-temperature-inflow-condition exhaust gas temperature and a low-temperature-inflow-condition exhaust gas temperature. The high-temperature-inflow-condition exhaust gas temperature is a temperature detected by a temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a high temperature region H while the reducing agent is supplied from the reducing agent supply means into the exhaust gas that flows into the oxidation catalyst. The low-temperature-inflow-condition exhaust gas temperature is a temperature detected by the temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a low temperature region L while the reducing agent is supplied from a reducing agent supply means into the exhaust gas that flows into the oxidation catalyst.

    摘要翻译: 催化剂劣化诊断系统基于高温流入条件排气温度和低温流入条件排气温度来诊断氧化催化剂的劣化。 高温流入条件废气温度是由温度传感器检测的温度,而流入氧化催化剂的废气的温度处于高温区域H,同时还原剂从还原剂供给源供给 意味着流入氧化催化剂的废气。 低温流入条件废气温度是由温度传感器检测的温度,而流入氧化催化剂的废气的温度处于低温区域L,而还原剂由还原剂供给源 意味着流入氧化催化剂的废气。

    Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine
    52.
    发明授权
    Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine 有权
    用于内燃机的缸内空燃比不平衡确定装置

    公开(公告)号:US08401765B2

    公开(公告)日:2013-03-19

    申请号:US13516841

    申请日:2009-12-18

    IPC分类号: F02D41/26 F02D41/30 F02B77/08

    摘要: An inter-cylinder air-fuel ratio imbalance determination apparatus that obtains, based on an output value Vabyfs of an air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount (AFD) which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus estimates an air-fuel ratio sensor element temperature (Temps) having a strong relation with responsiveness of the air-fuel ratio sensor during the parameter obtaining period, and obtains a corrected air-fuel ratio fluctuation indicating amount by correcting the AFD based on the estimated Temps. The determination apparatus adopts the corrected air-fuel ratio fluctuation indicating amount as the imbalance determination parameter X, and determines whether or not an inter-cylinder air-fuel-ratio imbalance state has been occurring based on a comparison between the imbalance determination parameter X and the imbalance determination threshold Xth.

    摘要翻译: 一种空转燃料比不平衡确定装置,其基于空燃比传感器的输出值Vabyfs,获得作为空燃比变动的空燃比变动指数(AFD)变大的空燃比变动指示量 在参数获取期间,通过设置有空燃比传感器的位置的排气变大。 确定装置估计在参数获取期间与空燃比传感器的响应性有很强关系的空燃比传感器元件温度(Temps),并且通过校正AFD来获得经校正的空燃比波动指示量 在估计的Temps。 确定装置采用校正的空燃比变动指示量作为不平衡判定参数X,并且基于不平衡确定参数X与不平衡确定参数X之间的比较来确定是否已经发生了缸间空燃比不平衡状态 不平衡判定阈值Xth。

    Abnormality diagnosis system and method for diagnosing abnormality in filter regeneration system
    54.
    发明授权
    Abnormality diagnosis system and method for diagnosing abnormality in filter regeneration system 失效
    异常诊断系统及过滤器再生系统异常诊断方法

    公开(公告)号:US08359827B2

    公开(公告)日:2013-01-29

    申请号:US12677277

    申请日:2009-02-24

    IPC分类号: F01N3/00

    摘要: The invention intends to provide a technology which makes it possible to diagnose with higher accuracy whether or not abnormality occurs in a filter regeneration system causing excessive execution frequency of a regeneration process. The filter regeneration system initiates execution of the regeneration process, incase an estimated particulate matter (PM) accumulation amount at the filter reaches a pre-determined regeneration requiring accumulation amount; or in case the pressure upstream of the filter or the differential pressure across the filter reaches a pre-determined regeneration requiring value, the value being larger than the pressure or the differential pressure corresponding to the regeneration requiring accumulation amount. Then, the diagnosis is carried out based on a ratio of an estimated PM accumulation amount at the initiation of the execution of the regeneration process to the regeneration requiring accumulation amount.

    摘要翻译: 本发明旨在提供一种能够以更高精度诊断导致再生处理的过度执行频率的过滤器再生系统中发生异常的技术。 过滤器再生系统启动再生处理的执行,使得在过滤器处的估计的颗粒物质(PM)累积量达到预定的再生需要累积量; 或者在过滤器上游的压力或过滤器上的压差达到预定的再生需求值的情况下,该值大于对应于再生需要累积量的压力或压差。 然后,基于再生处理开始时的估计PM积累量与再生需求累积量的比例进行诊断。

    INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE
    55.
    发明申请
    INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE 有权
    用于内燃机的缸内空燃比不平衡测定装置

    公开(公告)号:US20120277980A1

    公开(公告)日:2012-11-01

    申请号:US13516841

    申请日:2009-12-18

    IPC分类号: F02D41/26 F02D41/30

    摘要: An inter-cylinder air-fuel ratio imbalance determination apparatus that obtains, based on an output value Vabyfs of an air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount (AFD) which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus estimates an air-fuel ratio sensor element temperature (Temps) having a strong relation with responsiveness of the air-fuel ratio sensor during the parameter obtaining period, and obtains a corrected air-fuel ratio fluctuation indicating amount by correcting the AFD based on the estimated Temps. The determination apparatus adopts the corrected air-fuel ratio fluctuation indicating amount as the imbalance determination parameter X, and determines whether or not an inter-cylinder air-fuel-ratio imbalance state has been occurring based on a comparison between the imbalance determination parameter X and the imbalance determination threshold Xth.

    摘要翻译: 一种空转燃料比不平衡确定装置,其基于空燃比传感器的输出值Vabyfs,获得作为空燃比变动的空燃比变动指数(AFD)变大的空燃比变动指示量 在参数获取期间,通过设置有空燃比传感器的位置的排气变大。 确定装置估计在参数获取期间与空燃比传感器的响应性有很强关系的空燃比传感器元件温度(Temps),并且通过校正AFD来获得经校正的空燃比波动指示量 在估计的Temps。 确定装置采用校正的空燃比变动指示量作为不平衡判定参数X,并且基于不平衡确定参数X与不平衡确定参数X之间的比较来确定是否已经发生了缸间空燃比不平衡状态 不平衡判定阈值Xth。

    Light emitting diode driving apparatus
    57.
    发明授权
    Light emitting diode driving apparatus 有权
    发光二极管驱动装置

    公开(公告)号:US08111006B2

    公开(公告)日:2012-02-07

    申请号:US12374818

    申请日:2008-03-13

    IPC分类号: H05B41/36

    摘要: A light emitting diode driving apparatus 10 of the present invention includes: a driving voltage generating section 11 for generating a driving voltage Vout of an LED; a driving current control section 12 for PWM controlling driving currents iW1 to iW3 that flow through the LED; and a monitor voltage generating section 13 that monitors the driving voltage Vout, and that generates a monitor voltage Vm during an OFF period of the driving current by superposing on a predetermined reference voltage Vref, which is used as a standard, a voltage corresponding to a difference occurring in the driving voltage Vout during the OFF period. The driving voltage generating section 11 performs feedback control of the driving voltage Vout such that feedback voltages VW1 to VW3 are equal to the reference voltage Vref during an ON period of the driving current, and the driving voltage generating section 11 performs feedback control of the driving voltage Vout such that the monitor voltage Vm is equal to the reference voltage Vref during an OFF period of the driving current Vout.

    摘要翻译: 本发明的发光二极管驱动装置10包括:用于产生LED的驱动电压Vout的驱动电压产生部11; 用于PWM控制流过LED的驱动电流iW1至iW3的驱动电流控制部分12; 以及监视电压生成部13,其监视驱动电压Vout,并且通过将用作标准的预定参考电压Vref叠加在驱动电流的OFF周期期间产生监视电压Vm, 在OFF周期期间在驱动电压Vout中出现的差。 驱动电压产生部分11在驱动电流的导通期间中执行驱动电压Vout的反馈控制,使得反馈电压VW1至VW3等于参考电压Vref,并且驱动电压产生部分11执行驱动的反馈控制 电压Vout,使得在驱动电流Vout的OFF周期期间监视电压Vm等于基准电压Vref。

    Apparatus and method for detecting abnormal air-fuel ratio variation among cylinders of multi-cylinder internal combustion engine
    59.
    发明授权
    Apparatus and method for detecting abnormal air-fuel ratio variation among cylinders of multi-cylinder internal combustion engine 有权
    用于检测多缸内燃机气缸异常空燃比变动的装置和方法

    公开(公告)号:US08024105B2

    公开(公告)日:2011-09-20

    申请号:US12416262

    申请日:2009-04-01

    IPC分类号: F02D41/22

    摘要: An apparatus and a method for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine are provided. The apparatus includes: a catalyst that is provided in an exhaust passage of the multi-cylinder internal combustion engine; a catalyst temperature detection unit that detects a temperature of the catalyst; a catalyst temperature estimation unit that estimates a temperature of the catalyst based on an engine operating state; and an abnormality detection unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on the detected temperature of the catalyst and the estimated temperature of the catalyst.

    摘要翻译: 提供一种用于检测多缸内燃机的气缸之间的异常空燃比变动的装置和方法。 该装置包括:设置在多气缸内燃机的排气通路中的催化剂; 催化剂温度检测单元,其检测催化剂的温度; 催化剂温度估计单元,其基于发动机运转状态来估计催化剂的温度; 以及异常检测单元,其基于检测到的催化剂的温度和催化剂的估计温度来判定是否发生了气缸之间的异常空燃比变动。

    ABNORMALITY DIAGNOSIS DEVICE FOR AIR-FUEL RATIO SENSOR
    60.
    发明申请
    ABNORMALITY DIAGNOSIS DEVICE FOR AIR-FUEL RATIO SENSOR 有权
    用于空气 - 燃料比传感器的非正常诊断装置

    公开(公告)号:US20100186491A1

    公开(公告)日:2010-07-29

    申请号:US12666238

    申请日:2008-06-19

    IPC分类号: G01M15/10

    摘要: An abnormality diagnosis device according to the present invention can calculate a calculation air-fuel ratio A/Fk based upon a fuel injection quantity and an intake air quantity, and determine the abnormality of the air-fuel ratio sensor based upon the calculation air-fuel ratio and an actual air-fuel ratio detected by an air-fuel ratio sensor, when an operating condition in the internal combustion engine relatively rapidly changes according to an engine operating demand and thereby the calculation air-fuel ratio relatively rapidly changes. Since the air-fuel ratio is not forcibly changed and fluctuated, deterioration of the exhaust emission and the combustion state, and deterioration of the vibration and the noise at abnormality diagnosing can be certainly prevented.

    摘要翻译: 根据本发明的异常诊断装置可以基于燃料喷射量和进气量计算计算空燃比A / Fk,并且基于计算空气燃料来确定空燃比传感器的异常 当内燃机的运转状态相对快速地根据发动机运转要求而变化时,空燃比传感器检测出的实际空燃比相对快速变化。 由于空燃比没有强制变化和波动,所以可以可靠地防止排气排放和燃烧状态的劣化,异常诊断时的振动和噪声的劣化。