Evaluation Method for Diesel Particulate Trap Regeneration Additives: Application to Five Additives 2000-01-1914
The reduction of Particulate emission from diesel engines is one of the most important diesel exhaust emission problems and the use of Diesel Particulate Filter (DPF) appears essential for meeting future legislation. The Direct Injection turbo-charged diesel engine is characterized by low exhaust gas temperature and requires the use of an additive catalyst to allow soot combustion in the DPF.
Diesel particulate filter combined with additive are now commonly studied by car manufacturers. Presently suppliers propose different additives which are not easy to evaluate.
The aim of this work is to propose a new evaluation method of the capability of different additives.
Usually the additive performance for trap regeneration is assessed through the measurement of a single criterion: ignition temperature. This temperature depends on different parameters linked to exhaust gas and particulate filter properties. The ignition temperature is therefore not a sufficient criterion to characterize and rank the additives in a hierarchical system.
For that purpose, we propose an approach based on test bench experiments which allows us to determine, for each additive, kinetic constants of soot combustion.