| 摘要 |
<p>A maximum duration for the post-injections is determined (in 8) from the temperature downstream of the catalyst while the engine slows down. There are means (7, 8) of immediately cutting the post-injection(s) when the maximum is reached while foot is lifted and/or progressive reduction of the post-injection(s) when the maximum is reached while the engine slows. - System for helping the regeneration of means of depollution (1) associated with an oxidation catalyst (2) and integrated into the exhaust pipe (3) of a vehicle's Diesel engine (4). The engine is connected to a common fuel feed for all the cylinders. A regeneration strategy is put into operation by isocouple by injecting fuel into the cylinders in at least one post-injection. The system includes means (8) of detecting a request for regeneration (req.RG) and therefore for post-injection; means (8) of detecting a regeneration request (req.RG); means (9) of detecting that the foot has been lifted off the accelerator or (10) that the engine is slowing down, and means (11) of recording the temperature downstream of the catalyst. The means of progressively reducing the post-injection act by reducing the post- injection(s) according to a calibrateable slope. The means of depollution include a particle filter and/or NOx trap. The fuel includes an additive designed to be deposited onto the means of depollution with the particles with which it is mixed to aid regeneration, or an additive which forms a NOx trap. The engine is connected to a turbocompressor (5, 6).</p> |
