Thermal Loading Of An Uncooled Single-Cylinder Heavy-Duty Diesel 885119
Analytical modeling was coupled with experimental results to evaluate heat Bow around the combustion chamber of an un-cooled diesel. Good agreement was obtained between the model and experiment. Both experimental and analytic results showed that total heat rejection was roughly proportional to fueling rate, and that during the intake and compression strokes the uncooled engine transferred significantly more heat to the air charge than did the equivalent water-cooled engine, resulting in poor volumetric efficiency.
The model indicated that the greatest fraction of heat rejection occurred through the piston, and that spatial temperature variations in the air-gap-insulated metallic firedeck were much greater than the corresponding variations over the air-gap-insulated metallic piston crown. The low-heat-rejection diesel engine has been investigated because of its potential for improved fuel economy and reduced vehicle mass. Development of the LHR engine requires addressing the complex structural and lubrication problems arising from severe thermal loading.
Citation: Jones, J. and Alkidas, A., "Thermal Loading Of An Uncooled Single-Cylinder Heavy-Duty Diesel," SAE Technical Paper 885119, 1988, https://doi.org/10.4271/885119. Download Citation
Author(s):
John Dewey Jones, Aiex C. Alkidas
Pages: 12
Event:
22nd FISITA Congress
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Twenty-Second Fisita Congress--Automotive Systems Technology: the Future-P-211
Related Topics:
Combustion chambers
Diesel / compression ignition engines
Fuel economy
Pistons
Simulation and modeling
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
