Electrochemical sensor for measuring the concentra

专利名称：Electrochemical sensor for measuring the

concentration of nitrogen oxides

发明人：Werner Gruenwald申请号：US10620963申请日：20030715

公开号：US20040055886A1公开日：20040325

专利附图：

摘要：An electrochemical sensor is provided for measuring the concentration ofnitrogen oxides in a gas to be measured, in particular in the exhaust gas of internalcombustion engines in motor vehicles, having a first pump cell which includes a solid

electrolyte and a pair of electrodes situated thereon which are connected to a first pumpvoltage, and having a second pump cell situated downstream in the gas flow whichincludes a solid electrolyte and a pair of electrodes situated thereon which areconnected to a second pump voltage. To achieve an easily manufactured, moreeconomical design of the sensor, for the electrodes in a first pump cell, the firstelectrode is exposed to the exhaust gas and the second electrode is exposed to areference gas, and for the electrodes in a second pump cell, the first electrode isexposed to the gas volume leaving the first pump cell and the second electrode is alsoexposed to the reference gas. A Nernst cell for regulating the pump voltage at the firstpump cell is thereby dispensed with, and the sensor may be used at the same time formeasuring the oxygen concentration in the gas to be measured.

申请人：GRUENWALD WERNER

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