A special two-cylinder military specific power plant was employed to evaluate the effect of thermal barrier coated pistons on overall engine performance at simulated low heat rejection-type operating conditions. This study focused on three combustion systems including a noncoated baseline ductile iron piston along with zirconia and chrome-oxide sealed zirconia coated analogs. For the test matrix encompassing ten full and half-load operating conditions, both coated piston combustion systems yielded a detrimental effect on fuel economy in comparison to the baseline combustion system at constant fueling and air consumption rates. These performance differences were attributed to a combination of combustion phasing modulations, injection timing discrepancies, and sluggish combustion associated with the zirconia coated piston configurations.
Performance Characteristics of a Low Heat Rejection Direct-Injection Military Diesel Engine Retrofitted With Thermal Barrier Coated Pistons
Contributed by the Internal Combustion Engine Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division Apr. 2000; final revision received by the ASME Headquarters Jan. 2001. Associate Editor: D. Assanis.
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Schihl , P., Schwarz , E., and Bryzik, W. (January 1, 2001). "Performance Characteristics of a Low Heat Rejection Direct-Injection Military Diesel Engine Retrofitted With Thermal Barrier Coated Pistons ." ASME. J. Eng. Gas Turbines Power. July 2001; 123(3): 644–651. https://doi.org/10.1115/1.1370372
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