Measuring probe
AssigneeRobert Bosch GmbH
InventorsTheodor Graser, Gerhard Hoetzel, Johann Wehrmann, Heinz Eisenschmid
Life of this patent
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Abstract
A sensor, particularly for determining the oxygen content in exhaust gasses of internal combustion engines, includes sensor element which is fixed in a metallic housing and a sealing flange which is integrally formed on the housing and rests on a sealing seat which is formed on an exhaust system. The sealing flange has two ring elements which are integrally formed on the housing and each have an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing.
Claims7
A sensor for determining an oxygen content in an exhaust gas of an internal combustion engine, comprising:
- a housing;
- a sensor element fixed in the housing;
- and
- a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs.
The sensor according to claim 4, wherein the housing further comprises two annular surfaces, a first of the two annular surfaces being further from a measuring gas than a second of the two annular surfaces, the sealing arrangement being pressed between the two annular surfaces.
Exhaust pipe for an internal combustion engine with a sensor for determining an oxygen content in an exhaust gas of the internal combustion engine in the exhaust pipe, comprising:
- a pipe with an opening;
- a cylindrical connecting piece, the cylindrical connecting piece having a plane annular section, the cylindrical connecting piece being welded into the opening;
- a housing;
- a sensor element fixed in the housing;
- and
- a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs;
- the sealing flange resting on the plane annular section of the cylindrical connecting piece.
Dependencies are inferred from the claim text.