Axle Temperature Control Progress Report. February 28, 2011. Team Members Lee Zimmerman Boun Sinvongsa Emery Frey Mike Erwin Industry Advisor Dave Ruuhela , Daimler Trucks North America Academic Advisor Lemmy Meekisho. Introduction.
February 28, 2011
Dave Ruuhela, Daimler Trucks North America
2.25% of energy required to operate a truck at a steady highway speed is lost in the drive train
Increasing the lubricant fluid temp reduces the energy loss
A 1% improvement in efficiency would save each truck $800 per year
Toyota Prius exhaust gas exchanger
PADI Inc. Insulation Jackets
E.J. Bowman Heat Exchangers
Wolverine Engine Oil Heaters
Design is highly dependant on assumptions and difficult to model. Testing of assumptions will be key.
Reliability and cost considerations make more complex designs less feasible
To get a first approximation of insulation effectiveness, a simplified spherical model was used.
If insulation works as well as expected the fluid would potentially overheat on hot days
The fluid temperature could be maintained in the specified range by controlling forced convection
A valve/flap mechanism would provide temperature control with minimal power use.
While the insulation is expected be sufficient for warming the fluid, a cooling system will need to be designed
Future testing on an operating axle will provide information on the most effective locations for the cooling system and confirm the effectiveness of insulation