Magneti Marelli

Magneti Marelll S.p.a.

Magneti Marelli Powertrain, S.p.a.

Marelli Europe S.p.a.

Filippo Cavanna

Riccardo Lanzoni

Fabio Sensi

Stefano Sgatti

Nicola Garagnani

Marco Morelli

Fabio Panini

Alessandro Musi

Marco Panciroli

Massimo Zanotti

Francesco Alunni

Nicolo′ Cavina

Nicolò Cavina

Marco Pastorelli

Alberto Bucci

Marco Cesaroni

Ludovico Ausiello

Giancarlo Bisanti

Andrea Leoni

A method to determine the injection pattern in the intake stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine, which includes determining the overall quantity of fuel to be injected for each combustion cycle of each cylinder during the intake stroke; determining the maximum quantity of fuel to be injected for each partial injection as a function of the value of the start of injection angle, of the speed and of the load of the internal combustion engine; and determining the number of partial injections and the objective quantity to be injected for each partial injection as a function of the quantity of fuel to be injected for each combustion cycle of each cylinder during the intake stroke and of the maximum quantity of fuel to be injected for each partial injection.

Method to determine the injection pattern in the intake stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine

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.

Method for recognising the type of fuel actually used in an internal combustion engine

Method to detect and control detonation phenomena in an internal combustion engine provided with a number of cylinders and with at least two detonation sensors. For each combustion cycle as a function of the cylinder and of the engine point that is being explored, the method comprises the steps of processing the signal coming from each detonation sensor so as to determine a detonation energy for each detonation sensor; calculating a detonation index for each detonation sensor and controlling the internal combustion engine as a function of a total detonation index through the algebraic sum of the detonation indexes for each detonation sensor.

Method to detect and control detonation phenomena in an internal combustion engine

A method to determine the injection pattern in the compression stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine, comprising the steps of determining the initial quantity of fuel and an objective quantity of fuel to be injected for each partial injection of a maximum number of partial injections; determining an effective quantity of fuel to be injected for each partial injection as a function of the respective initial quantity of fuel and of the respective objective quantity of fuel; and determining an objective pattern of partial injections to be performed in the compression stroke as a function of the value of the end of injection angle and of the effective quantity of fuel to be injected for each partial injection of a maximum number of partial injections to be performed in the compression stroke.

Method of determining the injection pattern in the compression stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine

A method to control the temperature of the exhaust gases of a supercharged internal combustion engine, the method comprising: determining the minimum air/fuel ratio of the exhaust gases downstream of the exhaust manifold as a function of the flow rate of air that is not involved in the combustion taking place inside the cylinders and flows directly from the intake manifold into the exhaust pipe; detecting an air/fuel ratio of the exhaust gases downstream of the exhaust manifold by means of a sensor; and controlling the supercharged internal combustion engine as a function of the comparison between the air/fuel ratio of the exhaust gases detected by the sensor and/or the minimum air/fuel ratio of the exhaust gases with a number of threshold values.

Method to control the temperature of the exhaust gases of a supercharged internal combustion engine

A method for detecting the development of detonation phenomena in an internal combustion engine () which includes determining the variance (&#x3c3;) of each combustion taken into account for a given cylinder () and in a given engine point as a function of the comparison between the detonation energy (&#x3bc;) of each combustion taken into account and the self-learnt mean detonation energy (&#x3bc;) for the given cylinder () and in the given engine point; calculating the maximum variance (&#x3c3;) for a given cylinder () and in a given engine point with a reduction of the spark advance actuated in the given cylinder (); and determining the development of detonation phenomena for each combustion taken into account as a function of the comparison between the maximum variance (&#x3c3;) and the variance (&#x3c3;) of each combustion taken into account for a given cylinder () and in a given engine point.

Method for detecting detonation phenomena in an internal combustion engine

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.

Method of controlling knocking in an internal combustion engine equipped with a device for controlling the opening of inlet valves

A method recognizes at least one feature of fuel in an internal-combustion engine (). The method comprises steps of: detecting, by at least one sensor, intensity (S) of vibrations generated by the internal-combustion engine () within a measurement-time window; determining a value of at least one synthetic index (I) by processing the intensity (S) of the vibrations generated by the internal-combustion engine () within the measurement-time window; comparing a synthetic index (I) with at least one predetermined comparison quantity (TH); and recognizing the feature of the fuel as a function of the comparison between the synthetic index (I) and comparison quantity (TH).

Method for recognizing at least one feature of the fuel in an internal combustion engine

A method of controlling an internal combustion engine having at least one cylinder defining a variable-volume combustion chamber; and a rotating crankshaft powered by a piston sliding inside the cylinder; the control method including the steps of: determining a recording window expressed in engine angle degrees and having a start engine angle and a stop engine angle; acquiring and memorizing the intensity of sound pressure waves, generated by the internal combustion engine as a function of an engine angle, by means of at least one sound pressure sensor and within the recording window; and estimating the value of at least one operating parameter of a part of the internal combustion engine by analysing the intensity of the sound pressure waves in the recording window.

Method of microphone signal controlling an internal combustion engine

A method of determining opening of an intake valve of an internal combustion engine, the method including the steps of: determining the time pattern of an intake pressure in an intake manifold of the internal combustion engine, the time pattern of the rotation speed of a drive shaft of the internal combustion engine, or the time pattern of a voltage at the terminals of a battery of the internal combustion engine; determining an intake-frequency component of the intake pressure, the rotation speed, or the voltage; and

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Bologna, Italy

Filippo Cavanna