Abstract: An internal combustion engine includes a particulate filter that is configured to treat exhaust gas. A method for monitoring the particulate filter includes employing a soot sensor to monitor the exhaust gas downstream of the particulate filter. A fault is detected in the particulate filter when accumulated soot mass indicated by the soot sensor exceeds a soot mass threshold over a course of engine operation between a first regeneration event and a second regeneration event of the particulate filter. A control module associated with operation of the internal combustion engine is notified of the fault.

Abstract: An internal combustion engine includes a particulate filter that is configured to treat exhaust gas. A method for monitoring the particulate filter includes employing a soot sensor to monitor the exhaust gas downstream of the particulate filter. A fault is detected in the particulate filter when accumulated soot mass indicated by the soot sensor exceeds a soot mass threshold over a course of engine operation between a first regeneration event and a second regeneration event of the particulate filter. A control module associated with operation of the internal combustion engine is notified of the fault.

Abstract: A method is provided for controlling an internal combustion engine. The method includes, but is not limited to the step of measuring in-cylinder pressure of an expansion phase of a combustion cycle of a cylinder of the internal combustion engine and measuring in-cylinder pressure of a compression phase of the combustion cycle of the cylinder of the internal combustion engine. A difference between a polytrophic expansion phase constant of the cylinder of the internal combustion engine and a polytrophic compression phase constant of the cylinder of the internal combustion engine is then determined using the measured expansion phase pressure and the measured compression phase pressure. A misfiring of the cylinder is later detected using the determined difference.

Abstract: A method for operating an internal combustion engine includes measuring pressure values in a combustion chamber during an engine cycle and a corresponding value of crankshaft angular position for each pressure value and selecting values from the pressure values and the corresponding value of crankshaft angular position for each selected value. The corresponding values of the crankshaft angular position are used to calculate a corresponding inner volume value of the combustion chamber for each of the selected pressure values. For each of the selected pressure values and the corresponding inner volume value, a polytrophic constant is calculated according to C=pVk, C being the polytrophic constant, p the pressure value, V the inner volume value, and k the polytrophic index. A root mean square deviation (RMSD) of the polytrophic constant values is calculated and that a noise has affected the pressure values is identified if the RMSDs exceed a threshold value thereof.

Abstract: A method is provided to operate a diesel particulate filter of a Diesel engine equipped with a soot-sensor located in an outlet of the diesel particulate filter, the soot-sensor operating according to a succession of soot loading phases mutually separated by a regeneration phase. The method includes, but is not limited to setting a borderline value of the efficiency of the diesel particulate filter, resetting a value of a counter, during a regeneration phase of the soot-sensor, this value representing a soot loading level of the soot-sensor, iteratively increasing the value of this counter, during a next soot loading phase of the soot-sensor, at least until the value reaches a predetermined threshold value of the counter, and detecting an unsuited efficiency of the diesel particulate filter, if a next regeneration phase of the soot-sensor begins when the value of the counter is below the predetermined threshold value of the counter.

Abstract: A method is provided for operating a Diesel engine system. The diesel engine system includes, but is not limited to a Diesel engine, an intake line for feeding fresh induction air into the Diesel engine, an exhaust line for discharging exhaust gas from the Diesel engine, a Diesel Particulate Filter DPF located in the exhaust line, and an Exhaust Gas Recirculation EGR system for routing back exhaust gas into the Diesel engine. The EGR system includes, but is not limited to a long EGR route LRE that gets exhaust gas from the exhaust line downstream the DPF. The method includes, but is not limited to setting a soot threshold (Sth) for the amount of soot flowing into the LRE, determining the actual amount of soot (Saa) flowing into the LRE, and activating a LRE protection routine, if the actual amount of soot (Saa) exceeds the soot threshold (Sth).

Abstract: A device is provided for compressor and charge air cooler protection in an internal combustion engine, such as a Diesel engine. The engine having an intake manifold and an exhaust manifold, first and second EGR routes, a charge air cooler, a turbocharger having a compressor and a turbine. A regulator is also provided for regulating the flow rate of exhaust gas and the splitting of exhaust gas between the first and second EGR route. A temperature sensor is also provided for sensing output temperature of gas at the outlet of said compressor. A method and computer readable medium embodying a computer program product are also provided that have a first phase of monitoring a parameter representative of the gas temperature at the output of the compressor and a second phase in which an activity involving engine components operation is performed. The activity is performed using temperature information determined in the monitoring phase.

Abstract: A method is provided for controlling an internal combustion engine. The method includes, but is not limited to the step of measuring in-cylinder pressure of an expansion phase of a combustion cycle of a cylinder of the internal combustion engine and measuring in-cylinder pressure of a compression phase of the combustion cycle of the cylinder of the internal combustion engine. A difference between a polytrophic expansion phase constant of the cylinder of the internal combustion engine and a polytrophic compression phase constant of the cylinder of the internal combustion engine is then determined using the measured expansion phase pressure and the measured compression phase pressure. A misfiring of the cylinder is later detected using the determined difference.