Gas Sensor
OwnerHelmut Weyl, Andy Tiefenbachinventors
Life of this patent
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Abstract
A gas sensor is used in particular for determining a physical property of a measuring gas, preferably for determining the concentration of a component of an exhaust gas in an exhaust branch of an internal combustion engine. The gas sensor has a sensor element situated in a housing. The housing includes a protecting tube having apertures through which the measuring gas may reach the sensor element. At least on its side facing the sensor element, the protecting tube has an absorptivity which is subject to only minor changes during the intended operation of the gas sensor in an exhaust branch of an internal combustion engine.
Claims20
1-16. (canceled)
A gas sensor for determining a physical property of a measuring gas, comprising:
- a sensor element;
- and
- a housing containing the sensor element and including a protecting tube having apertures through which the measuring gas reaches the sensor element, wherein, at least on a side facing the sensor element, the protecting tube has an absorptivity which, during an intended operation of the gas sensor, is subject only to minor changes.
A method for manufacturing a gas sensor, the method comprising:
- prior to an installation in an exhaust branch of an internal combustion engine, heating at least a section of a protecting tube in an oxidizing atmosphere to a temperature of over 600° C., wherein, at least on a side facing a sensor element, the protecting tube has an absorptivity which, during an intended operation of the gas sensor in the exhaust branch of the engine, is subject only to minor changes.
Dependencies are inferred from the claim text.