THEORETICAL AND EXPERIMENTAL VALIDATION OF VISCOUS TORSIONAL DAMPER ON TURBOCHARGED INLINE SIX CYLINDER ENGINE

The torsional vibration of diesel engines is severe issue dueto increase of exciting force by higher pressure in turbocharged heavy duty engines. Diesel Engine crankshaft experiences the torsional vibration excitation torque due to the effect of cylinder firing pressure and the inertia of the reciprocating parts. These large torsional vibration amplitudescan cause noise, bearing wear, crankshaft failure. In order to attenuate the too large value of resonant torsional vibration amplitude the viscous damper is mounted on crankshaft crank nose end. The current work focus on experimentation torsional vibration damper for inline six cylinder turbocharged diesel engine for limiting the crank nose end torsional vibration amplitude within specified limit for entire speed range. For designing the damper multi mass system converted into lumped mass system. The natural frequency and torsional vibration amplitude is determined by Holzer tabulation method and also by using engine simulation software. For simulation purpose,various prototypes with varying viscosity, inertia & internal clearance. The prototypes was considered.. The engine torsional vibration (TV) analysis is carried out for different prototype samples considered and results are compared with bare crankshaft torsional vibration amplitude. Experimentalresults will be compared with the theoretical results generated by engine simulation software