Clean technologies for the future The main advantage of the generation of HDi, High Pressure, direct injection, diesel engines is a 20% reduction in carbon dioxide (CO2) emissions as compared with the classic, indirect injection engines. There is also a 40% reduction in carbon monoxide, 50% in hydrocarbons and 60% in particles. The HDi FAP is fitted with a particles filter (FAP), and is intended to eliminate emissions of polluting soot particles (black exhaust smoke). Less greenhouse effect Greenhouse effect is a natural phenomenon that facilitates life on earth, with the gas in the atmosphere such as CO2 absorbing the infrared rays given off by the sun. The greenhouse effect can change if the atmosphere contains too large an amount of CO2 (link to Peugeot World) that cannot be absorbed by photosynthesis: the planet’s climate then heats up. HDi engines provide over 20% savings in consumption as compared with previous-generation diesel engines, which translates into a matching drop in CO2 emissions that in turn is a reduction in greenhouse effect gases. What is more, an HDi engine can take up to 30% of Biodiesel, which reduces CO2 emissions even further. The combination of HDi engines and Biodiesel (for the time being limited to corporate fleets) represents major progress in reducing CO2 emissions from cars. FAP How does it work ? Phase 1: filtering This first phase involves catching the soot particles in a porous, silicon carbide filter. Phase 2: elimination of particles The second step, eliminating the soot particles, takes place in the regeneration phase. This periodic operation (after several hundred kilometres) is automatic and transparent to the driver. It simply consists in burning the soot particles that have accumulated in the filter, at a very temperature. The sequential regeneration takes place on account of the combined action: - Of the common rail system, which carries out a post-injection of fuel that helps increase the temperature of the exhaust to the combustion temperature for soot particles. -Of the additive that is automatically put in very small doses into the fuel tank, which brings down the temperature to 450°C as required for burning off the soot. This unique FAP additive technique ensures Peugeot vehicles eradicate particles in a reliable manner over time. Service periods for the filter have gone from 80,000 km to 120,000 km and are now over 180,000 km, through the combined optimisation of the filter and the additive.