TECHNICAL PAPERS: Internal Combustion Engines

Application of Controllable Electric Coolant Pump for Fuel Economy and Cooling Performance Improvement

[+] Author and Article Information
Hoon Cho, Dohoy Jung, Zoran S. Filipi, Dennis N. Assanis

Mechanical Engineering, The University of Michigan, Ann Arbor, MI 48109

John Vanderslice

 Ford Motor Company, Dearborn, MI 48124

Walter Bryzik

 U.S. Army Tank-Automotive Research, Development & Engineering Center, Warren, MI 48397

J. Eng. Gas Turbines Power 129(1), 239-244 (Jan 09, 2006) (6 pages) doi:10.1115/1.2227035 History: Received March 31, 2005; Revised January 09, 2006

The engine cooling system for a typical class 3 pickup truck with a medium duty diesel engine was modeled with a commercial code, GT-Cool, in order to explore the benefit of a controllable electric pump on the cooling performance and the pump operation. As the first step, the cooling system model with a conventional mechanical coolant pump was validated with experimental data. After the model validation, the mechanical pump submodel was replaced with the electric pump submodel, and then the potential benefit of the electric pump on fuel economy was investigated with the simulation. Based on coolant flow analysis, a modified thermostat hysteresis was proposed to reduce the recirculating flow and the electric pump effort. It was also demonstrated that the radiator size could be reduced without any cooling performance penalty by replacing the mechanical pump with the electric pump. The predicted results indicate that the cooling system with the electric pump can dramatically reduce the pump power consumption during the FTP 74 driving schedule and that the radiator can be downsized by more than 27% of the original size, under the grade load condition.

Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 3

Engine transient duty cycle corresponding to the Federal Urban Vehicle Schedule

Grahic Jump Location
Figure 4

Comparison of temperature predictions and measurements during the FTP 74 driving cycle

Grahic Jump Location
Figure 5

Predicted coolant mass flow rates during the FTP 74 driving cycle

Grahic Jump Location
Figure 1

Schematic diagram of V6, 4.5l diesel engine with its cooling system

Grahic Jump Location
Figure 2

Complete conventional cooling system model

Grahic Jump Location
Figure 6

Comparison of mechanical and electric coolant pump efficiencies

Grahic Jump Location
Figure 7

Comparison of coolant temperature at the exit of engine block between mechanical and electric pumps during the FTP 74 driving cycle

Grahic Jump Location
Figure 8

Predicted coolant mass flow rates with the electric coolant pump during the FTP 74 driving cycle

Grahic Jump Location
Figure 9

Modification of thermostat hysteresis

Grahic Jump Location
Figure 10

Predicted coolant mass flow rates toward the electric coolant pump inlet with the modified thermostat hysteresis

Grahic Jump Location
Figure 11

The effect of thermostat hysteresis on the engine wall temperature

Grahic Jump Location
Figure 12

Comparison of coolant pump power consumption during the FTP 74 driving cycle

Grahic Jump Location
Figure 13

Investigation of cooling capacity of each cooling system with original size radiator

Grahic Jump Location
Figure 14

Evaluation of the possibility of radiator downsizing



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In