| 摘要 |
An engine control system, which is equipped with a fuel injection control means for controlling and changing a fuel injection control pattern, and hence a combustion control pattern, in a combustion chamber according to engine operating conditions and a reduction substance increasing means for providing an increase in the reduction substance content of exhaust gas by changing the combustion control pattern, has a diagnostic function of making a diagnosis of functional abnormality of the reduction substance increasing step on the basis of engine output torque detected by a torque detector at least in a specified period of time of an expansion stroke while the reduction substance increasing means is effected. |
