18 February 2005

PSA Peugeot Citroën announced the one-millionth car equipped with the diesel particulate filter (DPF), which rolled off the assembly line at the end of January.

Introduced in May 2000 on the Peugeot 607, the PSA Peugeot Citroën’s DPF system has been gradually deployed on Peugeot and Citroën models in all segments. Today, the filter is available on nine model families: the Peugeot 206, 307, 407, 607 and 807, and the Citroën C4, C5, C8 and Xsara Picasso.

The 500,000th car fitted with diesel particulate filter was celebrated in June 2003. Since then, it has taken only 18 months to reach 1 million vehicles fitted with particulate filters. DPFs will continue to be extended to other Peugeot and Citroën models in the years to come, said PSA.

The Peugeot filter system utilizes a fuel additive—cerium/iron based Eolys by Rhodia—to lower the combustion temperature of soot. Regeneration of the filter is controlled by the common rail injection system, which periodically increases the exhaust temperature through post-injections of fuel. An oxidation catalyst positioned upstream of the filter oxidizes unburnt hydrocarbons generated by the post-injections, releasing additional quantity of heat.

PSA Peugeot Citroën is the first carmaker in the world to mass-market the particulate filter technology. German manufacturers, who introduced filters in 2004 on a number of Euro 4 vehicles, intend to use them in all new car models by 2009.

Source: PSA Peugeot Citroën