Adaptive throttle model for air intake system diagnostic

Details Adaptive throttle model for air intake system diagnostic Adaptive throttle model for air intake system diagnostic

2007-09-04

2007-09-04

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S117020

Reexamination Certificate

active

11226063

ABSTRACT:
A method and system to optimize values of a plurality of calibration discharge coefficients useable in a computer program operable to estimate mass air flow into an internal combustion engine having an air intake system comprising a throttle body and a plurality of sensors is presented. This includes collecting engine operation data points, including throttle position. Discharge coefficients are calculated, one for each engine operation data point. The discharge coefficients are partitioned based upon throttle position. Calibration discharge coefficients are calculated for each partitioned plurality of discharge coefficients. This includes circumscribing each calibration discharge coefficient based upon predetermined thresholds. This further includes monitoring and collecting input signals correlatable to airflow from the sensors during ongoing engine operation, preferably comprising throttle position, manifold pressure, intake air temperature, and, atmospheric pressure.

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