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    • 44. 发明申请
    • Method for operating an internal combustion engine and device for implementing the method
    • 用于操作内燃机的方法和用于实施该方法的装置
    • US20060168943A1
    • 2006-08-03
    • US11334970
    • 2006-01-18
    • Eberhard SchnaibelJens WagnerKersten WehmeierKlaus WinklerRichard Hotzel
    • Eberhard SchnaibelJens WagnerKersten WehmeierKlaus WinklerRichard Hotzel
    • F01N3/00F01N7/00
    • F02D41/1456F02D41/0295F02D2200/0816
    • A method for operating an internal combustion engine and a device for implementing the method may allow a catalytic converter diagnosis with a high degree of accuracy. At least one catalytic converter is positioned in the exhaust-gas region of the internal combustion engine, and a lambda sensor, which is configured as broadband lambda sensor, is positioned downstream from the catalytic converter or downstream from a section of the catalytic converter. The catalytic converter diagnosis is based on the evaluation of a measure for the oxygen storage capacity of the catalytic converter/within the catalytic converter. An at least approximately empty/filled oxygen reservoir of the catalytic converter is assumed. A change in the lambda setpoint value of the internal combustion engine to an excess air factor lambda that is greater than 1/less than 1 follows. Subsequently, a first change of the lambda signal is detected initially. Determined is a measure for the oxygen stored/discharged following the first change of the lambda signal. The determination of the stored/discharged oxygen is terminated if either a second change in the lambda signal is detected or if the measure of oxygen exceeds a threshold value.
    • 用于操作内燃机的方法和用于实施该方法的装置可以允许高精度的催化转化器诊断。 至少一个催化转化器位于内燃机的废气区域中,并且配置为宽带λ传感器的λ传感器位于催化转化器的下游或催化转化器的一部分的下游。 催化转化器诊断是基于催化转化器/催化转化器内储氧容量测量的评估。 假设催化转化器的至少大致为空/填充的氧气储存器。 以下是将内燃机的λ设定值改变为大于1 /小于1的过量空气因子λ。 随后,首先检测λ信号的第一变化。 确定是在λ信号的第一次变化之后储存/排出的氧气的量度。 如果检测到λ信号中的第二次变化,或者如果氧气测量值超过阈值,则终止储存/排出的氧气的测定。
    • 47. 发明授权
    • Electrochemical sensor
    • 电化学传感器
    • US06436277B2
    • 2002-08-20
    • US09247737
    • 1999-02-09
    • Eberhard SchnaibelHarald NeumannJohann RiegelLothar Diehl
    • Eberhard SchnaibelHarald NeumannJohann RiegelLothar Diehl
    • G01N27407
    • G01N27/417
    • An electrochemical sensor for ascertaining a gas concentration of a measuring gas includes an electrochemical element, including a first solid electrolyte body having an electrochemical pump cell and a first and a second electrode, and having a gas compartment which is connected via a gas access opening to the measuring-gas compartment, and in which one of the two electrodes is arranged. The electrochemical element further includes a second solid electrolyte body having an electrochemical sensor cell (Nernst cell) and a third and a fourth electrode. The surface of the first solid electrolyte body faces the measuring-gas compartment, and the gas access opening is covered by a porous protective layer. The electrochemical sensor includes a layer that exhibits a higher density or a lower porosity compared to the protective layer and that is allocated to the porous protective layer.
    • 用于确定测量气体的气体浓度的电化学传感器包括电化学元件,其包括具有电化学泵电池的第一固体电解质体和第一和第二电极,并且具有通过气体进入开口连接的气室, 测量气体室,并且其中布置两个电极中的一个。 电化学元件还包括具有电化学传感器单元(能斯特电池)和第三和第四电极的第二固体电解质体。 第一固体电解质体的表面面向测量气体隔室,并且气体进入口被多孔保护层覆盖。 电化学传感器包括与保护层相比表现出更高密度或更低孔隙率并分配给多孔保护层的层。