摘要:
An electrochemical measuring sensor for determining the oxygen content of gases, in particular, for determining the oxygen content in exhaust gases of internal combustion engines, with the sensor having a tube-shaped sensor element at whose outer side a measuring electrode is arranged which is exposed to the measuring gas and at whose inner side a reference electrode is arranged which is exposed to a reference gas. A pumping reference volume (58) is allocated to the reference electrode (36), which pumping reference volume is coated with a layer (60) having a high gas diffusion resistance.
摘要:
A method for manufacturing a sensor element for a gas sensor for determining a physical property of a test gas, particularly its temperature or the concentration of a gas component in a gas mixture, is provided, the sensor element having a hollow, finger-shaped solid electrolyte body, a measuring electrode resting outside on the solid electrolyte body, a reference electrode resting inside on the solid electrolyte body as well as circuit traces leading from the electrodes to contact areas. For a simplified manufacture of the finger shape of the sensor element with its mechanical advantages as compared to a planar sensor element, a planar carrier made of a deep-drawable ceramic material is printed on each of its carrier surfaces facing away from each other with a layer made of electrically conductive material in a defined geometric shape, and the printed carrier is deep-drawn into the finger shape.
摘要:
A gas sensor has improved electrical properties. In the top view of the layer planes of the body of the sensor, printed circuit traces for electrodes are arranged outside of cavities in the body, e.g., outside of the reference air duct. Furthermore, the electrodes are enlarged in the direction of the exhaust-side end of the sensor. Also, the printed circuit traces have an increased layer thickness or are formed as a double layer.
摘要:
A planar polarographic sensor for determining the lambda value of gas mixtures, for use with exhaust gases in internal combustion engines, includes a planar ceramic carrier sheet having an outer pumping electrode and an inner pumping electrode respectively arranged on opposite planar sides thereof, and a diffusion barrier. The outer and inner pumping electrodes, and the diffusion barrier are arranged on the planar ceramic carrier sheet so that the measuring gas is fed via the diffusion barrier to the inner pumping electrode. The sensor has front and side edge faces. The diffusion barrier is configured as a diffusion layer at least partially covering the inner pumping electrode and exposed at least at one edge face of the sensor to the measuring gas. A diffusion-free planar region of the sensor is provided with an equalizing layer having the same thickness as the diffusion layer, and the equalizing layer is disposed in the same plane with and adjacent to the diffusion layer.
摘要:
A sensor element for determining at least one property of a gas in a measuring gas chamber, in particular for detecting a gas component in a gas mixture. The sensor element includes at least one cell having at least one first electrode, at least one second electrode and at least one solid electrolyte connecting the first electrode and the second electrode having a solid electrolyte material. The sensor element further includes at least one carrier element made of a carrier material, the carrier material having a lower ionic conductivity than the solid electrolyte material. The carrier element is configured and situated to confer mechanical stability on the cell.
摘要:
A gas sensor, in particular for determining the oxygen content in exhaust gases of internal combustion engines, having a housing, a sensor element having a multi-layer design which is situated in the housing, and connecting lines lead to the outside for contacting the sensor element. A contacting element of a connecting line penetrates a layer of the sensor element and part of an insulating element situated outside the sensor element. For contacting the sensor element, such a contact configuration makes it possible to directly contact the contacting element of the connecting line, which may be arranged as a contacting pin, to the printed conductor which is formed inside the sensor element.
摘要:
A gas sensor for detecting at least one physical magnitude of a gas, in particular of exhaust gases of an internal combustion engine, is proposed, which includes a sensor element having an electrochemical cell. The electrochemical cell includes a first solid electrolyte member on which a first electrode and a second electrode are applied. The first and the second electrode are electrically connected by means of the first solid electrolyte member. The first electrode is in contact with the gas. The area of the first electrode is smaller than the area of the second electrode.
摘要:
An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.
摘要:
A sensor element constructed in layers for detecting a physical property of a gas or liquid, and in particular for detecting the concentration of a gas component or the temperature of an exhaust gas of an internal combustion engine. The sensor element includes a first and second layer as well as at least one contact face, which is disposed in a layer plane between the first and second layers. In the region of the contact face, the first layer includes a recess.
摘要:
An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.