| 摘要 |
Method for performing diagnostics on the intake air admitted to a motor vehicle internal combustion engine, the engine being equipped with a turbo compressor and with a low-pressure partial exhaust gas recirculation circuit (3) and/or a high-pressure partial exhaust gas recirculation circuit (4). The method involves the following steps: parameters characterizing the operation of the engine are determined, the richness in the exhaust is estimated, the richness in the exhaust is measured using a richness probe (31) placed in an exhaust pipe (7) of the internal combustion engine, a diagnostics criterion is determined by calculating the ratio between the measured richness in the exhaust and the estimated richness in the exhaust, the diagnostics criterion is compared against at least one diagnostics threshold that incorporates system spread, and a diagnostics signal dependent on the result of the comparison is emitted. |
