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Development of a Heavy-Duty Diesel Engine Towards Euro 3 Using Exhaust Gas Recirculation
Published June 21, 1995 by Societe des Ingenieurs de l'Automobile in France
Exhaust emissions legislation for heavy-duty engines now exists within the European Community. Additional legislation, known as Euro 3 standards, is envisaged for introduction around 1999.
A project is being undertaken to demonstrate the potential of exhaust gas recirculation (EGR) to assist with the reduction of NOx emissions in order to comply with possible Euro 3 limits (5 g/kW.h BSNOx and 0.10 g/kW.h BSPm). The project involves the design and development of a practical EGR system applied to a typical multi-cylinder engine. It aims to identify where further development is necessary in order to take the EGR system into full-scale production.
This paper examines some of the issues relating to the design of the EGR system and includes results showing the trends in emissions and economy at the possible Euro 3 NOx levels.