Intake air temperature rationality diagnostic

Details Intake air temperature rationality diagnostic Intake air temperature rationality diagnostic

2008-05-06

2008-05-06

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

C073S118040

Reexamination Certificate

active

11821590

ABSTRACT:
A method of determining whether a fault condition of an intake air temperature (IAT) sensor of an engine is present includes estimating a first intake charge temperature (ICT) based on an estimated first ICT and a previously estimated first mass air flow (MAF) and estimating a second ICT based on a previously estimated second ICT and a currently measured MAF. An IAT difference is determined based on the first ICT and the second ICT. Whether the fault condition of the IAT sensor is present is determined based on the IAT difference.

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patent: 2003-83150 (2003-03-01), None
U.S. Appl. No. 11/464,340, filed Aug. 14, 2006, Wenbo Wang et al.
Patent Application by Kurt D. McLain et al., “Intake Air Temperature Rationality Diagnostic”, filed Jun. 22, 2007, Reference No. P000543-PTE-CD, 21 pages.

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