Abstract: A control method of a butterfly valve of an internal combustion engine, when said internal combustion engine is running, wherein said butterfly valve is controlled by means of a control signal, indicative of an angular position of said valve, the method comprising a step of applying a first limiting filter of a gradient of said control signal, when a ratio between a target pressure downstream of the butterfly valve and a measured pressure upstream of the butterfly valve is greater than a first predetermined threshold.

Abstract: A control method of a butterfly valve of an internal combustion engine, when said internal combustion engine is running, wherein said butterfly valve is controlled by means of a control signal, indicative of an angular position of said valve, the method comprising a step of applying a first limiting filter of a gradient of said control signal, when a ratio between a target pressure downstream of the butterfly valve and a measured pressure upstream of the butterfly valve is greater than a first predetermined threshold.

Abstract: A system for preventing the accumulation of unburned hydrocarbons in a line of exhaust gas after-treatment system of an internal combustion engine comprising at least one devise for the reduction of pollutant emissions, wherein the exhaust gas after treatment system is devoid of any pre-catalyst and a procedure is envisioned for the continuous estimation of a mass of unburned hydrocarbons stored at least in the device for the reduction of pollutant emissions, so as to activate a strategy for accelerating the heating of the exhaust line, when the mass of unburned hydrocarbons exceeds a predefined threshold.

Abstract: System for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the engine itself, comprising means for measuring or estimating a pressure of a lubrication circuit (P) of the internal combustion engine, processing means (ECU) configured to activate means for preventing a mechanical damage of the internal combustion engine (E) at each starting of the latter, until said pressure is below a predetermined threshold.

Abstract: In a diesel engine equipped with a system for automatic regeneration of a particulate filter, an automatic regeneration mode is inhibited in the case where there is recorded a number higher than a pre-set threshold of unfavorable event. When the automatic regeneration mode is inhibited, an on-demand regeneration mode is simultaneously enabled, which can be activated manually by the driver. If an on-demand regeneration is not performed before the vehicle has covered a certain mileage since the automatic regeneration mode was inhibited, the vehicle is set in a condition of limited performance.