公开(公告)号：US06347277B2

公开(公告)日：2002-02-12

申请号：US09781673

申请日：2001-02-12

申请人： Markus Amtmann ,  Stephan Bolz ,  Jürgen Rössler

发明人： Markus Amtmann ,  Stephan Bolz ,  Jürgen Rössler

IPC分类号： G01N27419

CPC分类号： G01N27/4175

摘要： A control circuit of an exhaust probe has a microcontroller and an analog circuitry. Measured values which are recorded in a test chamber under predefined test conditions are stored in characteristic maps in a programmable read-only memory. These values are then used as a reference for a subsequent recalibration of a probe system.

摘要翻译： 排气探针的控制电路具有微控制器和模拟电路。 在预定测试条件下记录在测试室中的测量值存储在可编程只读存储器中的特性图中。 然后将这些值用作随后重新校准探针系统的参考。

公开(公告)号：US06767449B2

公开(公告)日：2004-07-27

申请号：US09914208

申请日：2001-11-30

申请人： Berndt Cramer ,  Bernd Schumann

发明人： Berndt Cramer ,  Bernd Schumann

IPC分类号： G01N27419

CPC分类号： G01N27/419

摘要： Method for operating a sensor for determining the concentration of oxidizing gases in gas mixtures, especially of the nitrogen oxide concentration in exhaust gases of internal combustion engines, wherein the sensor includes: at least one chamber (1; 2) mounted in a solid state electrolyte (20), the chamber being connected to the gas mixture via a first diffusion barrier (4); a second chamber (3) arranged in the solid state electrolyte (20) and the chamber having a pregivable constant oxygen partial pressure; on the solid state electrolyte, an oxygen pump electrode (9) subjected to the exhaust gas; a further oxygen pump electrode (7; 8) as well as an NO pump electrode (10) in the at least one chamber (1; 2); and an oxygen reference electrode (6) arranged in the second chamber (3); and at least a voltage is made available at the electrodes and at least a pump current is evaluated as a measurement signal. The method is characterized in that the voltages (U_IPE; U_O2; U_NO), which are applied to the electrodes, are changed in dependence upon the currents, which flow in the electrode feed lines and/or between the electrodes (6; 7; 8; 9; 10), during operation of the sensor in such a manner that the voltages correspond to pregivable desired values, these voltages being applied to the electrodes (6; 7; 8; 9; 10) in the interior of the sensor.

摘要翻译： 用于操作用于确定气体混合物中的氧化气体的浓度的传感器的方法，特别是内燃机废气中的氮氧化物浓度，其中所述传感器包括：至少一个安装在固态电解质中的室（1; 2） （20），所述腔室经由第一扩散阻挡层（4）连接到所述气体混合物; 布置在所述固态电解质（20）中的第二室（3）和所述室具有可预期的恒定氧分压; 在固体电解质上，经受排气的氧泵电极（9）; 在所述至少一个室（1; 2）中的另外的氧气泵电极（7; 8）以及NO泵电极（10）; 和设置在所述第二室（3）中的氧参考电极（6）。 并且至少在电极处获得电压，并且至少评估泵电流作为测量信号。 该方法的特征在于，施加到电极的电压（U_IPE; U_O2; U_NO）根据在电极馈送线和/或电极（6; 7; 8 ; 9; 10），在传感器的操作期间，电压对应于可预期的期望值，这些电压被施加到传感器内部的电极（6; 7; 8; 9; 10）上。

公开(公告)号：US06550305B2

公开(公告)日：2003-04-22

申请号：US10241480

申请日：2002-09-12

申请人： Naoki Tomisawa

发明人： Naoki Tomisawa

IPC分类号： G01N27419

CPC分类号： G01N27/4175 ,  F02D41/1456 ,  F02D41/1494

摘要： Before starting an air-fuel ratio feedback control utilizing an air-fuel ratio sensor, activation of a wide-range air-fuel ratio sensor in an internal combustion engine is diagnosed by calculating heat transferred to and from the air-fuel ratio sensor, the output value of the wide-range air-fuel ratio sensor varies in response to oxygen concentration in exhaust which varies according to the air-fuel ratio of an intake air-fuel mixture of the internal combustion engine. The activation time from the starting of the engine until the air-fuel ratio sensor is activated is estimate based on the calculated result of the heat transfer. Alternatively, activation of the sensor is diagnosed under the condition that an output voltage of the oxygen concentration detecting unit of the sensor is fixed to a value either equal to or above a rich-side set voltage or equal to or under a lean-side set voltage, before starting the air-fuel ratio feedback control.

公开(公告)号：US06301951B1

公开(公告)日：2001-10-16

申请号：US09382516

申请日：1999-08-25

申请人： Martin Lenfers ,  Lothar Diehl ,  Jürgen Schwarz

发明人： Martin Lenfers ,  Lothar Diehl ,  Jürgen Schwarz

IPC分类号： G01N27419

CPC分类号： G01N27/417

摘要： In a method of controlling a sensor for determining an oxygen concentration in a gas mixture, in particular in the exhaust gas of internal combustion engines, a detection voltage supplied by a Nernst measurement cell and corresponding to the oxygen concentration is transformed by a circuit arrangement into a pump voltage for a pump cell, and an anodic or cathodic limit current flows over the pump cell, depending on the oxygen content of the gas mixture. In stable operation of the sensor, during which an anodic limit current flows for a selectable period of time, the pump cell and/or the Nernst measurement cell receives at least one voltage pulse supplied independently by the measured detection voltage or the pump current thus established, so that the sensor is depolarized.

摘要翻译： 在控制用于确定气体混合物中的氧气浓度的传感器的方法中，特别是在内燃机的废气中，由能斯特测量单元提供并对应于氧气浓度的检测电压由电路装置转换成 根据气体混合物的氧含量，泵电池的泵电压和阳极或阴极极限电流流过泵电池。 在传感器的稳定运行期间，阳极极限电流在其中流动可选择的时间段，泵电池和/或能斯特测量单元接收由测量的检测电压或所建立的泵浦电流独立提供的至少一个电压脉冲 ，使传感器去极化。