Pressure sensor diagnosis via a computer

Details Pressure sensor diagnosis via a computer Pressure sensor diagnosis via a computer

2005-09-20

2005-09-20

Argenbright, Tony M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S115000, C701S102000, C123S557000, C123S193600, C123S640000, C123S525000, C060S277000, C060S278000, C073S117020, C073S118040

Reexamination Certificate

active

06947831

ABSTRACT:
A method is described for controlling regeneration of a particulate filter based on at least a sensor, such as a differential pressure sensor. Degradation of the sensor is then detected in a variety of ways. One approach takes advantage of the slowly varying flow resistance of the filter compared with the more rapid variations in flow caused by changing engine conditions. Default operation is then taken when a degraded sensor is detected.

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