Patent ID: 6092016
Filing Date: 2000-07-18
Classification: F02B,F02D,Y02T

Abstract:
A method for diagnosing an engine, the engine including a first cylinder bank and a second cylinder bank, the method comprising the steps of:(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 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.