VECON '84 : fuel efficient power trains and Vehicles. Fuel economy opportunities with an uncooled DI engine. SAE 841286. International Conference on Fuel Efficient Power Trains and Vehicles [22-24 Oct. 1984, London].

1984

769
CIENA

0-89883-712-X

An experimental, uncooled, single cylinder DI Diesel engine with ceramic coated cylinder head and valves, a heat insulated steel topped piston and a short, partially stabilized zirconia cylinder liner in the area above the piston rings provided 4 to 7 percent improvement in fuel consumption at operating conditions typical of the EPA CVS driving cycle for ligt duty vehicles relative to the vaseline water-cooled engine. An engine simulation model was used to explain the measured improvements in fuel consumption. Generally, the uncooled engine provided reductions in HC, NOx and particulate emissions. The trend of lower HC and NOx emissions was explained by the reduction in the amount of premixed combustion resulting from the shortened ignition delay period. The trend of lower particule emissions was explained by the increase in the diffusion combustion rate. Reduced rates of pressure rise for the uncooled engine were projected to result in lower noise levels. INTRODUCTION. EXPERIMENTAL ENGINE DESIGNS. FUEL CONSUMPTION RESULTS. FUEL CONSUMPTION PREDICTIONS. Diesel Engine Model. Adiabatic Engin Predictions. Partially Insulated Engine Predictions. EMISSIONS. Test Results. Combustion Analysis. NOISE. CONCLUSIONS. REFERENCES.

Presenta diagrs. y gráfs.

ESTADOS UNIDOS; MOTORES DIESEL; USO RACIONAL DE LA ENERGIA; TRANSPORTE PUBLICO;