公开(公告)号：US5795454A

公开(公告)日：1998-08-18

申请号：US569074

申请日：1995-12-04

申请人： Karl-Hermann Friese ,  Helmut Weyl ,  Romuald Fries ,  Hans-Martin Wiedenmann ,  Anton Hans

发明人： Karl-Hermann Friese ,  Helmut Weyl ,  Romuald Fries ,  Hans-Martin Wiedenmann ,  Anton Hans

IPC分类号： G01N27/409 ,  G01N27/12 ,  G01N27/407 ,  F16J15/14

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

摘要： A seal for a sensor element of a gas sensor for determining the oxygen content in gases including exhaust gases of an internal combustion engine, which seal seals the sensor element in a longitudinal bore of a housing, the seal including a sealing stack which is positioned within the longitudinal bore of the housing and around the sensor element in use and which is comprised of two sealing bodies and an additional seal positioned between the two sealing bodies. The two sealing bodies are comprised of a pre-sintered ceramic material. The additional seal is comprised of a pre-pressed powder material and has a porosity which is lower than that of the two sealing bodies. The two sealing bodies and the additional seal are compressed together within the longitudinal bore in use, whereby at least the additional seal is deformed so that the sensor element is sealed in a gap-free manner within the longitudinal bore. The pre-pressed powder material of the additional seal may consist essentially of a ductile metal, which may be one of nickel or copper, or graphite which may be fiber-reinforced.

摘要翻译： PCT No.PCT / DE94 / 00537 Sec。 371 1995年12月4日第 102（e）日期1995年12月4日PCT 1994年5月11日PCT公布。 公开号WO94 / 29710 日期1994年12月22日用于确定包括内燃机的废气在内的气体中的氧含量的气体传感器的传感器元件的密封件，该密封件将传感器元件密封在壳体的纵向孔中，所述密封件包括密封件 堆叠，其位于壳体的纵向孔内并且在使用中围绕传感器元件，并且由两个密封体和位于两个密封体之间的附加密封件组成。 两个密封体由预烧结的陶瓷材料组成。 附加密封件由预压粉末材料组成，并且具有低于两个密封体的孔隙率。 两个密封体和附加密封件在使用中在纵向孔内压缩在一起，由此至少附加的密封件变形，使得传感器元件以无间隙的方式密封在纵向孔内。 附加密封件的预压粉末材料可以由可以是镍或铜之一的延性金属或可以是纤维增强的石墨组成。