Sensor self-calibration system and method

Details Sensor self-calibration system and method Sensor self-calibration system and method

2008-06-13

2009-10-27

Vo, Hieu T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C060S274000, C073S118010

Reexamination Certificate

active

07610142

ABSTRACT:
A vehicle includes an engine, a booster, an exhaust gas sensor and a self-calibration arrangement for the exhaust gas sensor. When sensor calibration check is desired, a controlling unit opens a valve in order to subject a sensing element of the sensor to a supply of gas having a known gas concentration. Gas concentration signals from the sensor are compared with known concentration values, with the results being used to re-calibrate the sensor. The supply of gas can be received directly from the booster or from an optional reservoir. The invention is particularly applicable for use with a universal exhaust gas oxygen sensor in a vehicle powered by a diesel engine.

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