公开(公告)号：EP0870192B1

公开(公告)日：2007-11-14

申请号：EP97937450.1

申请日：1997-08-14

申请人： ROBERT BOSCH GMBH

发明人： WEYL, Helmut ,  WILD, Bernhard ,  WIEDENMANN, Hans-Martin

IPC分类号： G01N27/407

CPC分类号： G01N27/4062

摘要： The invention relates to a measurement device, especially an electrochemical sensor, comprising a sensor element located at a measuring point. The sensor element is accommodated in a housing which is connected by interconnecting electrical cables to an evaluation circuit remote from the measuring point. The interconnecting electrical cables are guided inside a protective device at least in the area close to the measuring point. The protective device (66) is connected to the housing (16) in positive and non-positive fit by a fastening device (66) encompassing the housing (16) and the protective device (66) to form a sealing seat (61).

公开(公告)号：EP1485699A1

公开(公告)日：2004-12-15

申请号：EP03704311.4

申请日：2003-02-17

申请人： ROBERT BOSCH GMBH

发明人： WEYL, Helmut ,  WIEDENMANN, Hans-Martin ,  WILDE, Juergen ,  KANTERS, Johannes

IPC分类号： G01N27/416 ,  G01N27/407 ,  G01K1/14

CPC分类号： G01K13/02 ,  F01N13/008 ,  F01N2560/025 ,  G01K1/14 ,  G01N27/407 ,  G01N27/4078

摘要： Disclosed is a sensor arrangement comprising a sensor (10) measuring a gas parameter of a gas that is to be measured. Said sensor (10) is provided with a measuring element (13) which is disposed in a housing (12) and a protruding section (131) of which extends from said housing (12) at least on the side of the gas that is to be measured. The inventive sensor is also provided with a gas duct (11) through which the gas to be measured flows and which comprises a sensor inlet (25) and a seat (26) receiving the housing (12), said seat (26) encompassing the inlet (25) and being fixed to the gas duct (11). In order to be able to direct the measuring element (13) in a reproducible manner relative to the flow of gas during mounting of the sensor arrangement without the assistance of a mechanic, the seat (26) is provided with an internal thread (28), the beginning of which is oriented in relation to the flow of gas that is to be measured, while the housing (12) is provided with an external thread (34) which can be screwed into the internal thread (28) and the beginning of which is oriented in relation to the measuring element (13). The housing (12) is fastened to the seat (26) by means of a given tightening torque.

公开(公告)号：EP0701693B1

公开(公告)日：2001-09-26

申请号：EP94914339.0

申请日：1994-05-11

申请人： ROBERT BOSCH GMBH

发明人： FRIESE, Karl-Hermann ,  WEYL, Helmut ,  FRIES, Romuald ,  WIEDENMANN, Hans-Martin ,  HANS, Anton

IPC分类号： G01N27/407

CPC分类号： G01N27/4078 ,  G01N27/407 ,  G01N27/4077 ,  Y10S277/936 ,  Y10S277/938 ,  Y10S277/939 ,  Y10S277/941 ,  Y10S277/943

摘要： Proposed is a seal (28) for the sensor element (16) of a gas sensor (10), in particular a sensor for the determination of the oxygen content of exhaust gases from internal-combustion engines. The seal (28) surrounds the sensor element (16) in a longitudinal bore (14) in the sensor housing (11) and has two seal elements (29, 30) between which is located a resilient supplementary seal (31) which has a lower porosity than the other two seal elements (29, 30).

摘要翻译： 提出了用于气体传感器（10）的传感器元件（16）的密封件（28），特别是用于确定来自内燃机的排气的氧含量的传感器。 密封件（28）在传感器壳体（11）中的纵向孔（14）中包围传感器元件（16）并且具有两个密封元件（29,30），在两个密封元件之间设置弹性补充密封件（31） 比其他两个密封元件（29,30）的孔隙率低。

公开(公告)号：EP0604468A1

公开(公告)日：1994-07-06

申请号：EP92918211.0

申请日：1992-08-27

申请人： ROBERT BOSCH GMBH

发明人： FRIESE, Karl-Hermann ,  WEYL, Helmut ,  WIEDENMANN, Hans-Martin

IPC分类号： G01N27

CPC分类号： G01N27/4075

摘要： Dans un capteur (10) de gaz d'échappement, les éléments de mesure (22, 24, 25) portent un revêtement (12, 13, 14, 26, 27, 28) constitué d'au moins deux couches. Le revêtement comprend au moins une couche en céramique (12, 26) contenant une substance sorbeuse, qui protège l'élément de mesure contre les substances toxiques contenues dans les gaz d'échappement à de basses températures d'utilisation, et au moins une autre couche en céramique (13, 27) qui fait face aux gaz d'échappement et qui sert à régler la position de régulation du capteur.

公开(公告)号：EP0393038B1

公开(公告)日：1993-03-10

申请号：EP88907239.3

申请日：1988-08-31

申请人： ROBERT BOSCH GMBH

发明人： FRIESE, Karl-Hermann ,  WEYL, Helmut ,  WIELAND, Werner ,  WIEDENMANN, Hans-Martin

IPC分类号： G01N27/417

CPC分类号： G01N27/4077

摘要： An electrochemical sensor for determining the oxygen content of exhaust gases has a probe made of an ion-conducting solid electrolyte in the form of a tube closed at one end, an inner electrode and an outer electrode arranged on the outer surface of the probe with a track on the connecting side. At least the part of the track facing the open end of the probe has a protective coating consisting of a densely sintered protective coating made from a mixture of the raw materials of the probe ceramic of the same or higher sinter activity. The hermetic protective coating covering the track permits continuous trouble-free operation of the sensor even in very rich exhaust gases (lambda 0.8) at high temperatures with heavy soot formation.

公开(公告)号：EP1247090B1

公开(公告)日：2011-07-27

申请号：EP00993740.0

申请日：2000-12-14

申请人： ROBERT BOSCH GMBH

发明人： SCHEER, Heiner ,  WIEDENMANN, Hans-Martin ,  HICKL, Josef ,  WAHL, Thomas ,  SCHNEIDER, Gerhard ,  RENZ, Hans-Joerg ,  NEUMANN, Harald ,  DIEHL, Lothar ,  KARLE, Jürgen

IPC分类号： G01N27/407

CPC分类号： G01N27/4071

摘要： The reference air duct of a gas sensor or lambda sensor having a body which is embodied in the form of a laminate is produced by means of print technology, enabling a correspondingly structured layer to be imprinted upon an adjacent layer, e.g. by means of serigraphy.

公开(公告)号：EP1497638B1

公开(公告)日：2008-09-10

申请号：EP03714678.4

申请日：2003-03-06

申请人： ROBERT BOSCH GMBH

发明人： WIEDENMANN, Hans-Martin ,  DIEHL, Lothar ,  MOSER, Thomas

IPC分类号： G01N27/419 ,  G01N27/406 ,  G01N27/407

CPC分类号： G01N27/419 ,  G01N27/4065 ,  G01N27/407

摘要： Disclosed is a method for operating a broadband lambda probe for determining the concentration of oxygen in the exhaust gas of an internal combustion engine (31) which is operated with a fuel-air mixture, wherein a pump voltage (Up) is applied to the pump cell (16) of the probe, said voltage being adjusted according to a Nernst voltage (UN) which is picked off at the Nernst cell (11), driving a cathodic or anodic pump current (Up) via the pump cell (16) according to the respective oxygen content of the exhaust gas. In order to maintain the measuring sensitivity of the probe (10) during fuel post-injection in lean operation mode and/or in the fast light off mode, the polarity of the pump voltage (Up) is repeatedly reversed during the fuel post-injection and/or fast light off phase so that an anodic pump current is briefly adjusted, said pump current pumping oxygen ions into the measuring chamber (20) accommodating the measuring electrode (12) of the Nernst cell (11) and inner electrode (17) of the pump cell (16), said oxygen ions oxidizing the hydrocarbons therein.

公开(公告)号：EP0552174B1

公开(公告)日：1996-12-18

申请号：EP91916308.9

申请日：1991-09-21

申请人： ROBERT BOSCH GMBH

发明人： FRIESE, Karl-Hermann ,  GRÜNWALD, Werner ,  WIEDENMANN, Hans-Martin

IPC分类号： G01N27/406

CPC分类号： G01N27/417

摘要： Proposed is a sensing element for broad-band sensors intended for the determination of the μ-value of gas mixtures. The element can be manufactured to a ceramic-sheet design using screen-printing techniques and has a Nernst electrode (9), which acts as an exhaust-gas electrode, in the diffusion gap (7) behind a pair of pump electrodes (8, 8') located one on each side of the diffusion gap (7). This disposition of the Nernst electrode (9) is a simple way of providing the pump cell formed by the inner pump electrode (8, 8') with efficient protection against overloads and avoids distortion of the sensor signal.

公开(公告)号：EP0386027B1

公开(公告)日：1995-01-11

申请号：EP88908671.6

申请日：1988-10-13

申请人： ROBERT BOSCH GMBH

发明人： FRIESE, Karl-Hermann ,  WIEDENMANN, Hans-Martin ,  SÖLL, Eva

IPC分类号： G01N27/417

CPC分类号： G01N27/4075

摘要： An electrochemical sensor for measuring the oxygen content of gases, in particular exhaust gases from internal combustion engines, comprises a solid electrolyte of zirconium dioxide and/or other oxides which conduct oxygen ions and at least one electrode arranged on the side of the solid electrolyte exposed to the gas to be measured. The electrode(s) may contain a ceramic supporting skeleton and the electrode(s) exposed to the gas to be measured is (are) covered with a porous ceramic protective coating of an Al2O3- and/or Mg spinel (MgO.Al2O3) matrix in which preferably metastable ZrO2 particles are embedded. The use of a mixed oxide system of Al2O3/ZrO2, which may contain a stabilizer for the ZrO2, and which is preferably obtained by coprecipitation or by combination of suspensions of separately precipitated components or by spray calcination of a common solution of salts of the components, makes it possible in a surprising way to obtain a sintered adhesive protective layer with a relatively narrow pore size distribution which allows the optimal passage of gas to the outer electrode of the sensor. The use of the Al2O3/ZrO2 mixed oxide powder also makes it possible to compensate to a very large extent for the previously observed disproportion between the mechanical stresses and the adhesive strength of the layer and to obtain the desired porosity and regulating position of the sensor.

公开(公告)号：EP0386027A1

公开(公告)日：1990-09-12

申请号：EP88908671.0

申请日：1988-10-13

申请人： ROBERT BOSCH GmbH

发明人： FRIESE, Karl-Hermann ,  WIEDENMANN, Hans-Martin ,  SÖLL, Eva

IPC分类号： G01N27 ,  C04B41

CPC分类号： G01N27/4075

摘要： Un capteur électrochimique de mesure de la teneur en oxygène de gaz, notamment les gaz d'échappement de moteurs à combustion interne, comprend un électrolyte solide en bioxyde de zirconium et/ou d'autres oxydes conducteurs d'ions d'oxygène et au moins une électrode agencée sur le côté de l'électrolyte solide exposé au gaz à mesurer. L'électrode ou les électrodes exposées au gaz à mesurer contiennent éventuellement une ossature céramique de support et sont recouvertes d'une couche céramique poreuse de protection composée d'une matrice en Al2O3- et/ou en spinelle de Mg (MgO.Al2O3) dans laquelle sont déposées des particules de ZrO2 de préférence métastables. L'utilisation pour former la couche de protection d'un système d'oxydes mixtes d'Al2O3/ZrO2 pouvant éventuellement contenir un stabilisateur du ZrO2, par exemple Y2O3, et obtenu de préférence par co-précipitation ou par l'union de suspensions de constituants séparément précipités, ou par la calcination par pulvérisation d'une solution commune des sels des constituants, permet, de façon surprenante, d'obtenir une couche adhésive de protection agglomérée par frittage et ayant une répartition relativement serrée de la grosseur des pores qui laisse passer les gaz de manière optimale jusqu'à l'électrode extérieure du capteur de mesure. L'utilisation de la poudre d'oxydes mixtes d'Al2O3/ZrO2 permet en outre de compenser dans une large mesure la disproportion auparavant observée entre les contraintes mécaniques et l'adhérence de la couche et d'obtenir la porosité et le positionnement de réglage voulus du capteur.