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    • 11. 发明授权
    • Arrangement for detecting the oxygen content in the exhaust gas of an
internal combustion engine
    • 用于检测内燃机的废气中的氧含量的装置
    • US5549804A
    • 1996-08-27
    • US315970
    • 1994-09-30
    • Gerhard HotzelHarald NeumannWalter StrassnerJohann Riegel
    • Gerhard HotzelHarald NeumannWalter StrassnerJohann Riegel
    • G01N27/419G01N27/406G01N27/407G01N27/409G01N27/26
    • G01N27/4071G01N27/4065
    • The invention is directed to an arrangement for detecting the oxygen content in the exhaust gas of an internal combustion engine. The arrangement includes a concentration measuring cell operating pursuant to the Nernst principle. The concentration measuring cell has a measuring electrode, a solid electrolyte and a reference electrode and a series circuit which includes a direct voltage source and a series resistor. The series circuit connects the measuring electrode to the reference electrode. The measuring electrode communicates with the exhaust gas of the internal combustion engine and is connected to the reference electrode via the solid electrolyte. The reference electrode communicates with the reference gas volume. The reference gas volume is partitioned from the exhaust gas and from the ambient air so that a particle exchange between the reference gas volume and the exhaust gas as well as between the reference gas volume and the ambient air is at least made more difficult. The output voltage of the concentration measuring cell defines a measure for the difference of the oxygen concentrations in the exhaust gas of the engine and the reference gas volume. The output voltage of the direct voltage source and/or the value of the series resistance is so pregiven that an electric current Ip is always so directed that oxygen is transported from the exhaust gas to the reference gas volume independently of the output voltage of the concentration measuring cell. The current Ip flows in a current circuit including direct voltage source, series resistance and concentration measuring cell.
    • 本发明涉及一种用于检测内燃机排气中氧含量的装置。 该装置包括根据恩斯特原理运行的浓度测量池。 浓度测量单元具有测量电极,固体电解质和参考电极以及包括直流电压源和串联电阻器的串联电路。 串联电路将测量电极连接到参考电极。 测量电极与内燃机的废气连通,并通过固体电解质与参比电极连接。 参考电极与参考气体体积连通。 参考气体体积与废气和环境空气隔开,使得参考气体体积和废气之间以及参考气体体积和环境空气之间的颗粒交换至少变得更困难。 浓度测量池的输出电压定义了发动机废气中的氧气浓度与参考气体体积之差的量度。 直流电压源的输出电压和/或串联电阻的值被假定为电流Ip始终如此指示氧气从排气转移到参考气体体积,而与输出电压的浓度无关 测量池。 电流Ip在包括直流电压源,串联电阻和浓度测量单元的电流电路中流动。
    • 19. 发明授权
    • Sensor arrangement for determining gas components and/or gas
concentrations of gas mixtures
    • 用于确定气体组分和/或气体混合物气体浓度的传感器装置
    • US5493896A
    • 1996-02-27
    • US256941
    • 1994-07-27
    • Johann Riegel
    • Johann Riegel
    • G01N27/12G01N27/407G01N33/00
    • G01N27/4074G01N27/4071
    • A sensor arrangement for determining at least one of gas constituents and gas concentrations of a gas mixture including oxidizable gas constituents includes a diffusion duct having a gas mixture gas orifice in communication with the gas mixture and having a reference gas orifice in communication with a reference gas; and a measuring element having a sensitive zone which is positioned in the diffusion duct, the sensitive zone being exposed to the gas mixture via the gas mixture gas orifice and being exposed to the reference gas via the reference gas orifice, wherein the reference gas and the gas mixture have respective oxygen partial pressures, and wherein the oxygen partial pressure of the reference gas is higher than the oxygen partial pressure of the gas mixture so that oxygen is present in the sensitive zone of the measuring element in amounts sufficient to oxidize the oxidizable gas constituents to be measured. In this sensor arrangement, oxygen concentration changes have a negligibly small effect on the sensitive zone and cross-sensitivity of the measuring element with respect to oxygen is largely eliminated.
    • PCT No.PCT / DE93 / 01152 Sec。 371日期:1994年7月27日 102(e)日期1994年7月27日PCT提交1993年12月3日PCT公布。 WO94 / 15203 PCT出版物 日期:1994年7月7日。用于确定包括可氧化气体成分的气体混合物的气体成分和气体浓度中的至少一种的传感器装置包括扩散管道,其具有与气体混合物连通的气体混合气体孔口并具有参考气体 与参考气体连通的孔口; 以及测量元件,其具有位于所述扩散管道中的敏感区域,所述敏感区域经由所述气体混合气体孔口暴露于所述气体混合物,并经由所述参考气体孔口暴露于所述参考气体,其中所述参考气体和 气体混合物具有相应的氧分压,并且其中参考气体的氧分压高于气体混合物的氧分压,使得氧在测量元件的敏感区域中以足以氧化可氧化气体的量存在 要测量的成分。 在该传感器布置中,氧浓度变化对敏感区域具有可忽略的小的影响,并且测量元件相对于氧气的交叉敏感性被大大消除。