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The quality of the environment is a continuing concern of the public in Europe and has been the driving force for much research, development and expenditure by the European Vehicle and Oil Industries. Legislation that has already been implemented and planned provides substantial improvements in air quality. Further improvements however are harder to achieve. Consequently, it has been accepted that a variety of measures, including vehicle/fuel changes need to be investigated together to make further air quality improvements. This paper describes the principles and organisational structure of a co-operative programme carried out by the European automobile industry (represented by ACEA), and the European oil industry (represented by EUROPIA). This programme, building on US AQIRP, is an important input into the process for developing environmental Legislation for the European Union (the European Auto/Oil process).

The EPEFE research programme is the largest European investigation of the effects of vehicle/fuel technologies on exhaust emissions. This paper consolidates and summarizes the more than 500 000 data points and compares and contrasts the effects of fuel properties in different vehicles and engines. While the relationships between fuel properties/engine technologies and exhaust emissions are complex, it has been possible to develop equations that model these interactions. The paper demonstrates how the output of EPEFE has been used to predict inventories of emissions from the european traffic for the period 2000-2010. The need for continuing co-operation between the Oil/Auto Industries and the Legislative Authorities to further understand the complex relationships is discussed.