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Post-treAtment for the next Generation Of Diesel Engines

The aim of this project is to provide a comprehensive, system-oriented view on potentially new after-treatment processes that will be required for the next HCCI (homogeneous charge compression ignition) combustion systems, taking into account the next fuel generation.

Tags: Road


Diesel innovation and leadership in core technological and scientific competencies are the key drivers for European competitiveness. In this context, diesel engine improvements towards more efficient and less polluting vehicles play a critical role in the competitiveness of the European car industry and in the long-term sustainable growth and job preservation in Europe, along with the necessary improvement of air quality and reduction of health effects. In the next ten years, it is anticipated that a smooth transition from conventional engines to new diesel technologies will happen (from conventional to partially homogeneous and then to finally homogenous over a wide range of operating points). Diesel homogeneous charge compression ignition (HCCI) combustion processes are seen as a promising way to meet the future environmental challenges, which will have to achieve both significantly lower pollutant emissions and fuel consumption. With these concepts, NOx and PM emissions are simultaneously drastically reduced avoiding the installation of a complex and costly NOx specific after treatment. The main drawback of this concept is that the level of low-temperature related emissions, i.e. CO and HC, can increase by several orders of magnitude. This implies that conventional oxidation catalysts’ technologies, currently used on Euro IV compliant vehicles, are no more able to convert these harmful emissions because of the saturation of the active catalytic sites. As a result, such increased CO and HC emissions have to be reduced to safe levels using innovative catalysts or emergent technologies, which have to be characterised by a different reaction kinetic, so are less dependant on the pollutants’ concentration. It is also admitted that such innovative combustion processes will merge with an increasingly wider diffusion of new fuel properties and renewable formulations, so that will be helpful to enlarge the engine running range (EUCAR RENEW project). The impact of these new fuel formulations on next-generation after-treatment processes will also have to be investigated.


The aim of this project is to provide a comprehensive, system-oriented view on potentially new after-treatment processes that will be required for the next HCCI combustion systems taking into account the next fuel generation.

The scientific objectives of this project are:

  • to understand the complex kinetic mechanisms and chemical principles of CO/HC low temperature oxidation for the next generation diesel engines exhaust environment
  • to develop a robust, efficient, and accurate computational models to analyse, simulate and improve the performance of next generation catalytic converters: a transient one-dimensional model and a single spatial dimension will be developed as a first step, and then 2D and 3D calculations will be investigated and integrated.

The technological objectives are:

  • to formulate, develop, test and optimise advanced new catalyst formulation for CO/HC low temperature oxidation
  • to design, develop and test emerging flexible low temperature oxidation technologies based on plasma concepts
  • to perform a powertrain system synthesis and evaluate, for the next generation powertrains, the requirements and boundary conditions needed to implement the advanced after-treatment processes in diesel engines.

Description of work


At the time of submitting this content, the PAGODE project had not started.