Fpt Industrial S.p.a.

Francesco Dell'Unto

Salvatore Musumeci

Fabio Odello

Ugo Pozzi

A system for detecting a leakage/failure in in an intake line of an internal combustion engine comprising an intake line (IL) and an exhaust line (EL), means (HFM) for measuring or for estimating a quantity of fresh air ({dot over (m)}) entering said intake line (IL), means for measuring or for estimating a quantity of fuel ({dot over (m)}) injected in the engine (E), measurement or estimation means (&#x3bb; and/or NOx), on the exhaust line, adapted to provide a first value (&#x3bb;) of an air/fuel ratio introduced in the internal combustion engine (E), the system comprising processing means (ECU) adapted to calculate a second value (&#x3bb;) of said air/fuel ratio, calculated on the basis of the measured and estimated quantities of fresh air ({dot over (m)}) and fuel ({dot over (m)}) to calculate an error (&#x3bb;) between the first and the second value (&#x3bb;&#x2212;&#x3bb;) and to detect a condition of leakage/failure if said error is outside a predefined interval [&#x3bb;&#x2212;, &#x3bb;+] containing the value zero.

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Turin, Italy

Francesco Dell'Unto