| 摘要 |
<p>The invention relates to a method for detecting the pinching of a coupling hose between a tank and a petrol fume filter, for a motor vehicle internal combustion engine, said fume filter (3) being connected to the engine via a duct comprising a controllable bleed valve (4). The method comprises at least one sequence of the following steps: a step consisting in opening the bleed valve; a step consisting in acquiring a series of measurements of the richness of the mixture entering the internal combustion engine over a period greater than a pre-determined value, representative of the length of the bleed period of the petrol fume filter; and a step consisting in comparing successive measured values and determining if the variation in richness from one measurement to the next remains below a pre-determined threshold for a group of measurements spread over a period greater than a pre-determined value.</p> |
