| 摘要 |
The invention concerns a method for purging or charging oxygen of a catalyst arranged in the flow of an exhaust gas purification system of an engine comprising the catalyst, a gas probe capable of supplying a signal making it possible to determine the oxygen content of the exhaust gases or the richness of the exhaust gases, downstream from the catalyst, the method comprising: a step of purging (B') - or respectively charging - oxygen in the catalyst, characterised in that the time of completion of step (B') is validated by an expected response of the signal (20) from the probe downstream from the catalyst caused by an upward - or respectively downward - pulse (30) of richness during the first step (B'). |
