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Ford 7.8 L Diesel Engine Charge Air Cooling System Density Recovery Optimization with Air-to-Air Cooling
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English
Abstract
Ford Motor Company has developed its 6.6 and 7.8 litre diesel engines for use in Class 6 and 7 vehicles. All engines in these two families are turbocharged and some are after cooled, with either jacket water or air. To improve horsepower ratings, fuel economy, and emission levels, the charge air is cooled to increase its density and thus the combustion efficiency.
This paper reports the results of a joint study by Ford and Thermag Industries to optimize the air-to-air cooling system with respect to system pressure losses, thus achieving the highest possible density recovery ratio.
It is noted that the theoretical density recovery ratio can be greater than 1.0, that is, a net pressure gain can be achieved through proper conversion of velocity head to static pressure, although practically this ratio will usually be less than 1.0.
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Citation
Rising, F., Cheong, A., and Helberg, K., "Ford 7.8 L Diesel Engine Charge Air Cooling System Density Recovery Optimization with Air-to-Air Cooling," SAE Technical Paper 872224, 1987, https://doi.org/10.4271/872224.Also In
References
- “Air-to-air Intercooling of the Ford 7.8L Mid-Range Truck Diesel Engine” Khair M.K. SAE paper 870534
- “Caterpillar 3406B Air-to-Air Aftercooled Truck Engine” Richards R.R. SAE paper 851474
- “Experimental Analysis and Computer Modelling of Turbocharger System Pressure Drop” Beldam R.P. Cheong A.S. Helberg K.H. SAE paper 870297
- “The Selection and Evaluation of Charge-Air Coolers for Vehicle Engines” Kern Josef Wallner Rolf SAE paper 840350