No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
Experimental Study on Auto-Transmission Fluid Heat Exchanger for Improving Vehicle Fuel Efficiency
Abstract
Drive-train friction loss in a vehicle may account for 4% of its total fuel consumption loss. An ATF W/C (auto-transmission fluid warmer/cooler) plate-fin heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between the auto-transmission fluid and coolant. The use of an ATF W/C heat exchanger can result in a fuel economy improvement of about 1% in vehicles. An experimental setup for testing the thermal performance of an ATF W/C plate-fin heat exchanger is developed. In this study, the influence of the ATF and coolant, flow rates, and temperature on the efficiency of an ATF W/C heat exchanger are investigated experimentally. From the experimental data, a simple correlation for predicting the efficiency of an ATF W/C heat exchanger is proposed. On the basis of this correlation, the fuel economy of a vehicle with and without an ATF W/C heat exchanger is compared by using Simulink. Finally, it is shown that the fuel economy is improved by 0.992% when an ATF W/C heat exchanger is installed in the vehicle.
ResearchGate has not been able to resolve any citations for this publication.
In order to improve the fuel economy by design change of automatic transmission, various technologies such as increased shift stages, slip control of lock-up clutch and compact and low-weight design have been developed. And also many OEMs have developed their own ATFs as a part of these automatic transmissions. In this study, to investigate the effects of ATF characteristics on fuel economy, we got the worldwide OEM ATFs and made some reference fluids. And physical properties, frictional characteristics and fuel economy using dynamometer test for these fluids were evaluated. From the investigation, it was found that viscosities of ATFs are correlated with fuel economy in dynamometer test and reducing the viscosities made it possible to obtain fuel economy.
Contenido: Clasificación de los intercambiadores de calor; Métodos de diseño básico de intercambiadores de calor; Correlaciones de convección forzada de intercambiadores de calor de una fase; Presión de vapor y energía de bombeo de intercambiadores de calor; Incrustaciones en intercambiadores de calor; intercambiadores de calor de doble tubo; Diseño de correlaciones para condensadores y evaporadores; Intercambiadores de calor (De tubos envolventes; Compactos; De superficies metálicas empaquetadas); Condensadores; Evaporadores; Apéndice.
Improvement of the Line Pressure Drop of Automatic Transmission at High ATF Temperature and Low Engine Speed Condition Through Performance Improvement of the Oil Pump
- W J Sung
- J S Oh
Sung, W. J. and Oh, J. S., 2005, "Improvement
of the Line Pressure Drop of Automatic
Transmission at High ATF Temperature and Low
Engine Speed Condition Through Performance
Improvement of the Oil Pump," KSAE Annual
Conference, pp. 618~622.
A Study of Improving of Efficiency of Power-Train Cooling System
- D K Kim
- M Y Jung
- J Y Lee
- K Y Kim
Kim, D. K., Jung, M. Y., Lee, J. Y. and Kim,
K. Y., 2009, " A Study of Improving of
Efficiency of Power-Train Cooling System," KSAE
Annual Conference, pp. 731~736.
Heat exchangers Selection Design & Construction Longman Scientific & Technical
- E A D Saunders
Saunders, E. A. D., 1988, Heat exchangers
Selection Design & Construction Longman
Scientific & Technical, New York, pp. 135~140.