| 摘要 |
1. 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 ( m HFM ) entering said intake line (IL), means for measuring or for estimating a quantity of fuel ( m FUEL ) injected in the engine (E), measurement or estimation means (» and/or NOx), on the exhaust line, adapted to provide a first value ( » measured ) of an air/fuel ratio introduced in the internal combustion engine (E), the system comprising processing means (ECU) adapted to calculate a second value ( » exp ) of said air/fuel ratio, calculated on the basis of the measured and estimated quantities of fresh air ( m HFM ) and fuel ( m FUEL ) to calculate an error ( » err ) between the first and the second value ( » measured - » exp ) and to detect a condition of leakage/failure if said error is outside a predefined interval [ » err -, » err +] containing the value zero. |
