Objetivo The purpose of the project is to demonstrate the energy performance of an innovative direct injection diesel engine designed to satisfy new very low emission levels for medium load trucks (10-12 tonnes). A 5% saving in fuel consumption is expected compared to the normal consumption level that would normally be seen with the conventional unchanged engines. Emission limits 20% lower for NOX and 30% lower for HC than the values prescribed by Reg.49 ONU. It is also intended to preserve the same engine performance standards obtained before the introduction of the emission restrictions.Eight vehicles have been prepared : six with the innovative engines having high compression ratio and two with the original engines with low compression ratio to be taken as base line. Fleet tests started in September 1987. First results will be available at the end of 1988.Present-day technology tends to cut down the NOX released by direct diesel engines through variations on a number of the engine parameters, and first of all injection retard paying little attention to the design of the combustion system. In this way, the reduction of NOX is attained with greater fuel consumption.The new combustion system is based on a high compression ratio (18 to 20 instead of 16/17) leading to a decrease in injection delay optimised through new air intake ducts. The new engine configuration is also characterized by recentrant combustion chamber, and multi-hole injectors with an extremely small or possibly no sac volume.The demonstration involves direct engines with unit cylinder capacity of 1 litre from Iveco's 8000 engine series, used on goods and passenger transport vehicles on mostly suburban routes. This particular engine class is especially difficult to optimize in terms of emission and consumption, owing to the marked interaction between the fuel jet and the wall of the combustion chamber, an interference which is not observed in higher cylinder capacity engines.It is hoped to achieve, with these modifications, specific emissions of 1.8 g/kWh(HC)and 10.8 g/kWh (NOX)(limits set by Regulation 49 ONU reduced by 20% (NOX)and 30% (HC)plus a 25% engineering targets reduction),without impairing the reduction in fuel consumption already achieved before the introduction of emissions regulation.Six innovative engines and two conventional ones will alternatively be bench tested and run on predeterminated routes with special measurement equipment.It is expected to have no extracost for the new diesel engines in large volume mass production compared to present costs Programa(s) ENG-ENALT 2C - Programme (EEC) of demonstration projects relating to the exploitation of alternative energy sources and to energy saving and the substitution of hydrocarbons, 1983-1985 Tema(s) 3.3 - TRANSPORT Convocatoria de propuestas Data not available Régimen de financiación DEM - Demonstration contracts Coordinador IVECO FIAT SPA Aportación de la UE Sin datos Dirección LUNGO STURA LAZIO 49 10156 Torino Italia Ver en el mapa Coste total Sin datos
