公开(公告)号：EP2300811A1

公开(公告)日：2011-03-30

申请号：EP09772250.8

申请日：2009-05-29

申请人： Robert Bosch GmbH

发明人： GOELL, Stefan ,  SCHEFFEL, Marcus ,  MOSER, Thomas ,  DIEHL, Lothar

IPC分类号： G01N27/407

CPC分类号： G01N27/407

摘要： The invention relates to a sensor element (110) for determining at least one physical variable of a gas in a sample gas chamber (112), particularly for determining an amount of a gas component in an exhaust gas of an internal combustion engine. The sensor element (110) comprises at least one first electrode (114), at least one second electrode (118), and at least one solid electrolyte (116) connecting the first electrode (114) and the second electrode (118). The second electrode (118) is disposed in at least one electrode hollow space (120). The sensor element (110) comprises at least one gas access path (122), by way of which gas from the sample gas chamber (112) can be applied to the electrode hollow space (120). The gas access path (122) comprises at least one first section (124) having at least one porous flow barrier (126) and at least one second section (130) having at least one diffusion channel (136). The first section (124) and the second section (130) are connected in series. The first section (124) has a first diffusion resistance, and the gas access path (122) has a total diffusion resistance. The first diffusion resistance constitutes a portion of 20% to 80% of the total diffusion resistance.

公开(公告)号：EP1800117B1

公开(公告)日：2010-01-27

申请号：EP05789497.4

申请日：2005-08-18

申请人： ROBERT BOSCH GMBH

发明人： DIEHL, Lothar ,  SCHEFFEL, Marcus

IPC分类号： G01N27/419 ,  G01N27/406

CPC分类号： G01N27/4065 ,  G01N27/419

公开(公告)号：EP2002253B1

公开(公告)日：2012-06-13

申请号：EP07726504.9

申请日：2007-02-26

申请人： Robert Bosch GmbH

发明人： DIEHL, Lothar ,  SCHEFFEL, Marcus ,  SEILER, Thomas ,  REINSHAGEN, Holger

IPC分类号： G01N27/406

CPC分类号： G01N27/419 ,  G01N27/4067

摘要： The invention relates to a gas sensor for determining the oxygen concentration in a gas mixture, especially in the exhaust gas of internal combustion engines. Said gas sensor comprises a pump cell having an outer pump electrode, exposed to the gas mixture, and an inner pump electrode, exposed to the gas mixture via a diffusion barrier, and a solid electrolyte body interposed between the outer pump electrode and the inner pump electrode. The gas sensor also has a reference electrode, exposed to a reference gas, and a sensor heating device. The outer pump electrode is connected to a circuit arrangement via a pump current line, the inner pump electrode via a measuring line, the reference electrode via a reference current line and the sensor heating device via two heating lines. The invention is characterized in that the pump current line and one heating line are electrically interconnected and grounded, the pump current can be supplied via the measuring line and the Nernst voltage can be tapped between the measuring line and the reference pump current line and the reference pump current flows from the reference electrode to the outer pump electrode.

公开(公告)号：EP1800117A1

公开(公告)日：2007-06-27

申请号：EP05789497.4

申请日：2005-08-18

申请人： ROBERT BOSCH GMBH

发明人： DIEHL, Lothar ,  SCHEFFEL, Marcus

IPC分类号： G01N27/419 ,  G01N27/406

CPC分类号： G01N27/4065 ,  G01N27/419

摘要： A sensor element for determining the concentration of gas components in a gas mixture, particularly the concentration of gas components in the exhaust gas of internal combustion engines, comprising two electrodes which, together with a solid electrolyte, form a pump cell, the outer pump electrode thereof (16) being exposed to the gas mixture via a porous protective layer, also comprising a reference electrode (42) which is arranged on the solid electrolyte and exposed to a reference gas, forming a concentration or Nernst cell in conjunction with the solid electrolyte and a Nernst electrode (50). The invention is characterized in that the Nernst voltage between the outer pump electrode (16) and the Nernst electrode (50) (dispersion differential voltage) is picked off at least intermittently and is evaluated. .

公开(公告)号：EP2002253A1

公开(公告)日：2008-12-17

申请号：EP07726504.9

申请日：2007-02-26

申请人： Robert Bosch GmbH

发明人： DIEHL, Lothar ,  SCHEFFEL, Marcus ,  SEILER, Thomas ,  REINSHAGEN, Holger

IPC分类号： G01N27/406

CPC分类号： G01N27/419 ,  G01N27/4067

摘要： The invention relates to a gas sensor for determining the oxygen concentration in a gas mixture, especially in the exhaust gas of internal combustion engines. Said gas sensor comprises a pump cell having an outer pump electrode, exposed to the gas mixture, and an inner pump electrode, exposed to the gas mixture via a diffusion barrier, and a solid electrolyte body interposed between the outer pump electrode and the inner pump electrode. The gas sensor also has a reference electrode, exposed to a reference gas, and a sensor heating device. The outer pump electrode is connected to a circuit arrangement via a pump current line, the inner pump electrode via a measuring line, the reference electrode via a reference current line and the sensor heating device via two heating lines. The invention is characterized in that the pump current line and one heating line are electrically interconnected and grounded, the pump current can be supplied via the measuring line and the Nernst voltage can be tapped between the measuring line and the reference pump current line and the reference pump current flows from the reference electrode to the outer pump electrode.

摘要翻译： 气体传感器技术领域本发明涉及一种用于确定气体混合物中的氧气浓度的气体传感器，尤其是内燃机的废气中的氧气浓度。 所述气体传感器包括具有暴露于气体混合物的外泵电极和通过扩散阻挡层暴露于气体混合物的内泵电极的泵单元以及插入在外泵电极和内泵之间的固体电解质体 电极。 气体传感器还具有暴露于参比气体的参比电极和传感器加热装置。 外部泵电极经由泵电流线连接到电路装置，经由测量线连接到内部泵电极，经由参考电流线连接到参考电极，并且经由两根加热线连接到传感器加热装置。 本发明的特征在于，泵电流线路和一条加热线路电互连并且接地，泵电流可以通过测量线路提供，并且能斯脱电压可以在测量线路和参考泵电流线路之间分接， 泵电流从参考电极流向外泵电极。