Patent ID: 7658184
Filing Date: 2010-02-09
Classification: F02D

Abstract:
1. A method for adjusting a fuel-air ratio for a fuel-air mixture provided to a cylinder assembly of an engine, comprising: detecting a set of rich exhaust gas temperature signals corresponding to a set of rich fuel-air ratio values, each of the set of rich fuel-air ratio values having a fuel-air ratio value that is greater than a threshold fuel-air ratio value; detecting a set of lean exhaust gas temperature signals corresponding to a set of lean fuel-air ratio values, each of the set of lean fuel-air ratio values having a fuel-air ratio value that is less than the threshold fuel-air ratio value; detecting an intersection between the set of lean exhaust gas temperature signals and the set of rich exhaust gas temperature signals, the intersection associated with an actual peak fuel-air ratio value; comparing the actual peak fuel-air ratio value with the threshold fuel-air ratio value; and adjusting the fuel-air ratio in the fuel-air mixture provided to the cylinder assembly based upon the comparison of the actual peak fuel-air ratio value and threshold fuel-air ratio value.