1959-01-01

an evaluation of AFTERCOOLING in Turbocharged Diesel Engine Performance 590049

AFTERCOOLING, coupled with higher pressure turbocharging can increase vehicle engine output. The author thinks that it is possible to anticipate diesel engines being run with compressors supplying air at pressure ratios higher than 2/1.
Density ratio is the most important consideration in increasing pressure ratio, since the engine's output is dependent upon weight rather than volume of air supplied. Because the density of the compressed air is dependent upon its temperature at any pressure level, cooling the air after compression results in density increases.
This paper describes various methods of after-cooling which increase engine output and fuel economy.

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