Abstract: A method is disclosed to control an exhaust gas after-treatment system with at least one catalytic converter arranged along an exhaust duct and a burner, which is suited to introduce exhaust gases into the exhaust duct, wherein inside the burner there is defined a combustion chamber, which receives fresh air through an air feeding circuit and fuel from an injector; the method comprises housing a temperature and pressure sensor interposed between a pumping device and the burner or leaving the burner; acquiring the pressure signal generated by the combustion inside the combustion chamber and detected by said temperature and pressure sensor; and controlling the combustion inside the combustion chamber as a function of said pressure signal.

Abstract: A method is disclosed to control an exhaust gas after-treatment system with at least one catalytic converter arranged along an exhaust duct and a burner, which is suited to introduce exhaust gases into the exhaust duct, wherein inside the burner there is defined a combustion chamber, which receives fresh air through an air feeding circuit and fuel from an injector; the method comprises housing a temperature and pressure sensor interposed between a pumping device and the burner or leaving the burner; acquiring the pressure signal generated by the combustion inside the combustion chamber and detected by said temperature and pressure sensor; and controlling the combustion inside the combustion chamber as a function of said pressure signal.

Abstract: A method for recognizing the type of fuel actually used in an internal combustion engine; the recognition method includes the steps of: sensing the intensity of the vibrations generated by the internal combustion engine within a measurement time window; determining the value of at least one synthetic index by processing the intensity of the vibrations generated by the internal combustion engine within the measurement time window; comparing the synthetic index with at least one predetermined comparison quantity; and recognizing the type of fuel actually used as a function of the comparison of the synthetic index to the comparison quantity; and forcedly altering, when detecting the intensity of the vibrations, the engine control with respect to the normal standard engine control, so as to enhance the behavioral differences of the different types of fuel that can be used by the internal combustion engine.

Abstract: A method for detecting the development of detonation phenomena in an internal combustion engine (1) which includes determining the variance (?i) of each combustion taken into account for a given cylinder (2) and in a given engine point as a function of the comparison between the detonation energy (?i) of each combustion taken into account and the self-learnt mean detonation energy (?i_m) for the given cylinder (2) and in the given engine point; calculating the maximum variance (?i_max) for a given cylinder (2) and in a given engine point with a reduction of the spark advance actuated in the given cylinder (2); and determining the development of detonation phenomena for each combustion taken into account as a function of the comparison between the maximum variance (?i_max) and the variance (?i) of each combustion taken into account for a given cylinder (2) and in a given engine point.

Abstract: A method for detecting the development of detonation phenomena in an internal combustion engine (1) which includes determining the variance (?i) of each combustion taken into account for a given cylinder (2) and in a given engine point as a function of the comparison between the detonation energy (?i) of each combustion taken into account and the self-learnt mean detonation energy (?i—m) for the given cylinder (2) and in the given engine point; calculating the maximum variance (?i—max) for a given cylinder (2) and in a given engine point with a reduction of the spark advance actuated in the given cylinder (2); and determining the development of detonation phenomena for each combustion taken into account as a function of the comparison between the maximum variance (?i—max) and the variance (?i) of each combustion taken into account for a given cylinder (2) and in a given engine point.

Abstract: A method of controlling knocking in an internal combustion engine equipped with a device for controlling the opening of inlet valves; the control method includes the phases of: determining the occurrence of an excessive knocking in the cylinder of the internal combustion engine; and decreasing the mass of air sucked into the cylinder in which an excessive knocking has occurred by acting on the control device controlling the inlet valves of the cylinder.

Abstract: A method for recognising the type of fuel actually used in an internal combustion engine; the recognition method includes the steps of: sensing the intensity of the vibrations generated by the internal combustion engine within a measurement time window; determining the value of at least one synthetic index by processing the intensity of the vibrations generated by the internal combustion engine within the measurement time window; comparing the synthetic index with at least one predetermined comparison quantity; and recognising the type of fuel actually used as a function of the comparison of the synthetic index to the comparison quantity; and forcedly altering, when detecting the intensity of the vibrations, the engine control with respect to the normal standard engine control, so as to enhance the behavioural differences of the different types of fuel that can be used by the internal combustion engine.

Abstract: A method of controlling knocking in an internal combustion engine equipped with a device for controlling the opening of inlet valves; the control method includes the phases of: determining the occurrence of an excessive knocking in the cylinder of the internal combustion engine; and decreasing the mass of air sucked into the cylinder in which an excessive knocking has occurred by acting on the control device controlling the inlet valves of the cylinder.