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Clean, economical engines to cut greenhouse gas emissions
 PSA Peugeot Citroën is committed to cutting greenhouse gas emissions, an objective it considers to be a strategic priority. Already recognised as a reference in the development of advanced petrol and diesel engines, the Group has introduced key technological innovations, along with the associated systems to control pollutant emissions. The objective: to cut fuel consumption and protect the environment while enhancing driving pleasure.
PSA Peugeot Citroën: world leader in direct-injection diesel technology
Thanks to an innovation strategy focusing on the engine itself and on pollution control technology, the Group's expertise in diesel technology is recognised worldwide. Over the past 15 years and more, PSA Peugeot Citroën has pursued investments in R&D to develop and market a new generation of high pressure direct injection diesel engines using common rail technology. As illustrated by the success of the HDi engine, which is now fitted on more than eight million vehicles. These engines provide:
- fuel consumption 20% lower than a prechamber diesel engine, resulting in an equivalent reduction in CO2 emissions;
- enhanced driveability thanks to the torque available at low engine speed, with noise and vibration levels comparable to those of a petrol engine;
- excellent environmental performance thanks to the precise combustion control of common-rail technology and efficient pollution control systems.
In 2000, HDi was combined with a new pollution control system, diesel particulate filter system, which destroys all diesel particles - whatever their size - and reduces emissions to barely measurable levels (0.004 g/km). In a world first, the DPFS was introduced on the Peugeot 607. It is now widely available across both the Peugeot and Citroën ranges, and is fitted on almost 1.5 million vehicles.
See our magazine article on diesel technology
PSA Peugeot Citroën is European leader for its efforts to cut emissions of carbon dioxide. More than 30% of Group vehicles emit less than 120 grams of CO2 per km. This figure even rises to 60% for vehicles emitting less than 110 g of CO2 per km.
See the range of diesel engines available on PSA Peugeot Citroën passenger cars sold in Europe
Petrol engines: a new generation
Tremendous advances were made in pollution control for petrol engines during the 1990s. From 1992, all new European passenger cars had to be fitted with catalytic converters. This brought a spectacular 90% reduction in emissions of the main pollutants: carbon monoxide (CO), nitrogen oxides (NOx) and unburned hydrocarbons (HC). The majority of cars on the road in Europe today are equipped with these systems, and urban air quality has improved as a result.
Since 2004, cooperation between PSA Peugeot Citroën and BMW Cooperation has brought further progress in petrol engine design, resulting in improved performance and pollution control. For example, the new 1.6l engines developed through this cooperation feature the latest technology in terms of architecture, fuel supply and injection. The result: improved driving pleasure, fuel consumption cut by up to 10% and CO2 emissions reduced by almost 15 %.
Hybrid diesel engines from 2010
In early 2006, PSA Peugeot Citroën presented two demonstration vehicles, each one fitted with a hybrid diesel-electric drivetrain, the 307 and C4 hybrid HDi.
The performance of these vehicles marks a significant breakthrough in terms of fuel economy and CO2 emissions. These results go hand-in-hand with improved driveability during all driving phases and particularly in urban use. Average consumption is 3.4l of diesel per 100 km for CO2 emissions of 90 grams per km.
PSA Peugeot Citroën plans to bring hybrid HDi vehicles to market from 2010.
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