Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1999-01-25
2000-07-18
Wolfe, Willis R.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701114, 123676, 731173, F02D 4114, F02D 4122, G06G 770
Patent
active
060920165
ABSTRACT:
An apparatus and method for diagnosing an engine including at least two cylinder banks using an exhaust temperature model is disclosed. The apparatus and method are operable for: (a) determining an actual exhaust temperature value for the first cylinder bank, an actual exhaust temperature value for the second cylinder bank, and an average exhaust temperature value for the first and second cylinder banks; (b) determining a plurality of parameters; (c) determining a modeled exhaust temperature value for the first cylinder bank, a modeled exhaust temperature value for the second cylinder bank, and a modeled average exhaust temperature value for the first and second cylinder banks, as a function of the plurality of parameters; (d) comparing the modeled and actual exhaust temperature values for the first cylinder bank, comparing the modeled and actual exhaust temperature values for the second cylinder bank, and comparing the modeled and actual average temperature values, and responsively determining a difference value for the first cylinder bank, a difference value for the second cylinder bank, and an average difference value, respectively; and (e) diagnosing the engine as a function of at least one of the difference value for the first cylinder bank, the difference value for the second cylinder bank, and the average difference value.
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Sarangapani Jagannathan
Schricker David R.
Caterpillar Inc.
Wolfe Willis R.
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