Magneti Marelli S.p.a.

Magneti Marelli Powertrain, S.p.a.

Francesco Alunni

Marco Panciroli

Stefano Sgatti

Filippo Cavanna

Fabio Sensi

Massimo Zanotti

Loris Lambertini

Luigi De Luca

Canio Caterini

Andrea Leoni

Matteo Domenico Albertazzi

Marco Montaguti

Canio Rocco Caterini

A method detects a 'misfire' condition in an internal-combustion engine including a control unit, a driving shaft and phonic wheel that is splined to the shaft and coupled to a sensor. The method comprises steps of: detecting intensity of a signal generated by passage of teeth of the wheel by the sensor, sampling the signal generated by the passage of the teeth, processing the sampled signal by applying a discrete Fourier transform, representing the sampled signal processed by a virtual phasor that represents in a vector form the signal that has been sampled and processed, determining a corresponding theoretical phasor for the virtual phasor that represents theoretical evolution of the signal that has been sampled and processed over time, comparing the theoretical phasor with the virtual phasor, and determining presence of a 'misfire' condition by comparing the theoretical phasor with the virtual phasor that represents the signal that has been sampled and processed.

Method for detecting a misfire condition in an internal combustion engine

A method for controlling the wastegate in a turbocharged internal combustion engine including the steps of: determining, during a design phase, a control law which provides an objective opening of a controlling actuator of the wastegate according to the supercharging pressure; determining an objective supercharging pressure; measuring an actual supercharging pressure; determining a first open loop contribution of an objective position of a controlling actuator of the wastegate by means of the control law and according to the objective supercharging pressure; determining a second closed loop contribution of the objective position of the controlling actuator of the wastegate; and calculating the objective position of the controlling actuator of the wastegate by adding the two contributions.

Method for controlling with adaptivity a wastegate in a turbocharged internal combustion engine

Method for controlling a wastegate in a turbocharged 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

Method of determining opening of an internal combustion engine intake valve

Method for zone controlling a wastegate in a turbocharged internal combustion engine

Method of acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold; the internal combustion engine having at least one cylinder that receives fresh air through an intake duct, which is controlled by a butterfly valve and is provided with a pressure sensor connected to an electronic control unit. The acquisition and processing method provides for the following steps: measuring, via the pressure sensor, the instantaneous induction pressure at a plurality of different crank angles distributed over an engine cycle; storing, during each engine cycle, the instantaneous induction pressures in a fast acquisition buffer of the electronic control unit; and determining, at the end of each engine cycle, the mean induction pressure in the engine cycle by calculating a mean of the instantaneous induction pressures previously stored in the fast acquisition buffer of the electronic control unit.

Method for acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold

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San Sisto, Italy

Francesco Alunni