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International Journal of Automotive Technology > Volume 5(1); 2004 > Article
International Journal of Automotive Technology 2004;5(1): 23-31.
EFFECTS OF SKIRT PROFILES ON THE PISTON SECONDARY MOVEMENTS BY THE LUBRICATION BEHAVIORS
J. CHO, S. JANG
Kookmin University
ABSTRACT
Secondary movements of piston in the bore clearance are closely related to the side impact to the engine block as well as many tribological problems. Some of the major parameters that influence these kinds of movements are piston profile shapes (barrel and flat), piston pin offsets and the magnitudes of bore clearances. In our study, computational investigations are performed about the piston movements in the bore clearance by changing the skirt profiles and piston offsets. In this work, it is found that curved profile and larger offset magnitude to thrust side provide better performance that has low side impact during the engine cycle.
Key Words: Secondary movement of piston, Skirt profile, Piston offset, Slide impact, Hydrodynamic lubrication
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