Low rotational-speed aspects of centrifugal pendulum vibration absorbers

• The performance of the centrifugal pendulum vibration absorber (CPVA) is investigated in the low rotational-speed regime in the context of a heavy-duty combustion engine. With the given dimensions and properties of heavy-vehicle engines, special considerations must be taken into account in the analysis of the CPVAs in the low speed regime. In this study, bifilar-suspended pendula absorbers attached to the engine flywheel, tuned to absorb the main engine firing order, is modeled analytically. Friction damping is included in the pendulum model and the effects of the performance by varying the pendulum path curve is studied in the low rotational-speed regime. The low rotational-speed is due to engine down-speeding, resulting in excessive torsional vibration in the driveline. In order to maintain or improve NVH and fulfill legal requirements, the excess torsional vibration must be addressed to gain the emission benefits of down-speeding. Simulation and analysis of the CPVA behaviour is therefore paramount for heavy-vehicle manufacturers to understand and thus make well balanced decisions to fulfill environmental goals.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

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