Patent ID: 7373918

Claim:
A method of controlling a diesel engine system for an internal combustion engine having a plurality of cylinders, in each of which former stage injection and subsequent latter stage injection are performed in such a manner that combustion of fuel injected by the former stage injection causes ignition of fuel injected by the latter stage injection, and extinguishment of the combustion of the fuel injected by the former stage injection causes non-ignition of the fuel injected by the latter stage injection, the method comprising: injecting, through a plurality of injectors, fuel into the plurality of the cylinders, respectively, of the internal combustion engine; controlling opening and closing of the plurality of injectors based on an operational state of the internal combustion engine, wherein the controlling includes execution of the former stage injection and the subsequent latter stage injection in each of the cylinders through a corresponding one of the injectors; and sensing a misfired one of the plurality of cylinders having misfire in the internal combustion engine, wherein: the controlling includes increasingly correcting a former stage injection quantity of the former stage injection in the misfired one of the cylinders until elimination of the misfire when the misfire is sensed by said sensing; the former stage injection is pilot flame generative injection for generating a pilot flame; the latter stage injection is large heat generative injection for generating large heat; the controlling includes execution of a retarded combustion operation in such a manner that the large heat generative injection is performed at a retarded angle where sole combustion of the large heat generative injection is normally disabled, and the large heat generative injection is ignited by pilot flame combustion that is executed by compression and ignition of the pilot flame generative injection; and the correcting of the former stage injection quantity correcting is a pilot flame generative injection quantity correcting for increasingly correcting a pilot flame generative injection quantity of the pilot flame generative injection of the misfired one of the cylinders until the elimination of the misfire when the misfire is sensed by said sensing in the retarded combustion operation.