Method for attaching a sensor at an exhaust gas treating device

摘要

#CMT# #/CMT# The method involves providing an exhaust gas processing device (1) with a ceramic insert (3) e.g. substrate. The ceramic insert is fixed in a metallic housing (2) by a support mat (5), where one of the housing and the mat is penetrated by the housing. A retaining opening (7) that retains a sensor (6) is penetrated into the ceramic insert and produced by the ceramic insert by a drilling process and/or chipping process, where the insert is fixed in the opening and inserted in the housing. #CMT# : #/CMT# An independent claim is also included for an exhaust gas processing device e.g. particle filter and catalyzer, for an exhaust gas system of an internal combustion engine in a motor vehicle. #CMT#USE : #/CMT# Method for attaching a sensor e.g. lambda-sensor and nitrogen oxide-sensor, at an exhaust gas processing device e.g. particle filter and catalyzer, for an exhaust gas system of an internal combustion engine in a motor vehicle (all claimed). Can also be used for a pressure sensor, temperature sensor and oxygen sensor. #CMT#ADVANTAGE : #/CMT# The retaining opening for retaining of the sensor is penetrated into the ceramic insert and produced by the ceramic insert that is fixed in the opening and inserted in the metallic housing, so that the optimal alignment between the individual openings and/or recesses in the housing is enabled in the support and in the ceramic insert in a better manner, and the opening is produced in the use, without providing increased risk of damage for the ceramic insert and separate fixing of the ceramic insert for producing of the retaining opening, thus simplifying the manufacturing for the retaining opening, while realizing narrower tolerances within the retaining opening. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a simplified longitudinal sectional view of a part of an exhaust gas processing device in a phase during attaching of a sensor. 1 : Exhaust gas processing device 2 : Housing 3 : Ceramic insert 5 : Support mat 6 : Sensor 7 : Retaining opening.