Stmicroelectronics S.r.l.

Ferdinando Taglialatela-Scafati

Nicola Cesario

Francesco Carpentieri

Francesco Pirozzi

Paolo Amato

Giovanni Moselli

Maurizio Di Meglio

Giovanni Di Lorenzo

Pasquale Cassese

A method of sensing the air/fuel ratio in a combustion chamber of an internal combustion engine that may be easily implemented by a respective low-cost device includes a pressure sensor and a learning machine that generates a sensing signal representing the air/fuel ratio by processing the waveform of the pressure in at least one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.

Method and associated device for sensing the air/fuel ratio of an internal combustion engine

A reliable method of sensing the inlet air flow in a combustion chamber of a cylinder of an internal combustion engine includes assessing the inlet air flow with soft-computing techniques basically exploiting a combustion pressure signal generated by a pressure sensor installed in the cylinder.

Method and device for estimating the inlet air flow in a combustion chamber of a cylinder of an internal combustion engine

The amount of fuel to be injected in each cylinder of a multi-cylinder spark ignition internal combustion engine may be determined with enhanced precision if the fuel injection durations are determined as a function of the sensed mass air flow in all the cylinders of the engine, instead of considering only the air flow in the same cylinder. This finding has led to the realization of a more efficient approach of controlling a multi-cylinder spark ignition internal combustion engine and a feedforward control system.

Method of feedforward controlling a multi-cylinder internal combustion engine and associated feedforward fuel injection control system

A method of diagnosing misfire or partial combustion conditions in an internal combustion engine without using a phonic wheel discriminates the combustion conditions with soft-computing techniques directly exploiting a combustion pressure signal generated by a common pressure sensor installed in the cylinder. There exists an exploitably close correlation between the instantaneous values of the internal cylinder pressure and the occurrence of misfire or partial combustion conditions, and thus the cylinder pressure signal may be reliably used for diagnosing misfires or partial combustions in functioning conditions of the engine.

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Giugliano, Italy

Ferdinando Taglialatela-Scafati