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Four-stroke powered gasoline auto-ignition controlled combustion engine


Objectives and content
The purpose of this industrial research project is to
research and develop an innovative gasoline controlled
auto-ignition combustion process for its application to
lean burn automotive 4-stroke engines. The engine
concept developed could industrially replace the existing
stoichiometric (with 3-way catalyst) automotive spark
ignition 4-stroke engine The combination of several
engines innovative technologies, with some of them
derived from 2-stroke engine technology (such as internal
fluid dynamic control with high EGR rate) will be
investigated by the main contractors IFP (FR), Daimler-Benz (DE), FORD (GB) and PSA (FR) and then will be
implemented in the advanced design of this new engine
concept, up to the final economic and technical
evaluation of the in-vehicle on-the-road potential. The
total scientific and technological "4-SPACE" programme
amounts to 4.6 MECU during a period of 3 years.
The expected achievements in terms of fuel economy and
environmental impact are as follows:
Demonstration of the potential to meet the most
stringent emissions limits proposed for EU for spark
ignition automotive engines in the year 2005 concerning
the regulated pollutants (CO, HC and NOx) without
requiring a DeNOx catalyst technology,
Compared to its stoichiometric 4-stroke counterpart, a
reduction of fuel consumption and therefore of
corresponding CO2 emissions of 15 to 20 % in average
conditions of use, is expected with the "4-SPACE" lean
burn 4-stroke, with an additional combined reduction of
CO2 emissions and of unregulated nitrous oxide (N20)
emissions by 60 to 80 %, leading therefore to a global
greenhouse gas emission contribution reduced by 20 to 30
Compared to its diesel 4-stroke counterpart, it would
provide similar level of fuel economy and C02 emissions
as prechamber diesel with the advantages of 5 to 10 times
lower particulate and NOx emissions.
The main RTD tasks necessary to comply with these
industrial and technical objectives will start from the
research study and in cylinder conditions analysis of the
recently marketed first 2-stroke engine running in
controlled auto-ignition (Honda Activated Radicals
combustion), followed by scientific investigations using
CFD modelling and combustion visualisation in engines in
order to try to transfer the 2-stroke internal conditions
favourable to auto-ignition to an automotive 4-stroke
engine design. From these investigations, and 4-stroke
auto-ignition published results by Japanese car
manufacturers and research laboratories, several single
cylinder "4-SPACE" engine concepts will be developed
and tested. The performance of the most promising
concepts will be extrapolated to estimate potential invehicle emissions and fuel consumption results. The
undertaking of these RTD tasks will rely on the combined
expertise of the four main contractors and on the highly
complementary expertise of the associated contractors,
Brunel (GB) and Heidelberg (DE) Universities.
The successful implementation of this project would
contribute to keep a better European balancing between
gasoline and diesel fuel production on a refining point
of view and would bring benefits to the EU of improved
competitiveness in the automotive world markets.


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Participants (5)

Brunel University
Kingston Lane
UB8 3PH Uxbridge
DaimlerChrysler AG
Epplestraße 225
70567 Stuttgart
Ford Motor Company Ltd
Dunton Research Centre
SS15 6EE Basildon
GIE PSA Peugeot Citroën
75,Route De Gisy 75
78140 Vélizy-villacoublay
253,Im Neuenheimer Feld 229
69120 Heidelberg