Automobile Engineering in ME
The purpose of a balancer shaft is to

Adjusts the timing of the intake and exhaust valve openings
Increase inertia force of the rotating crankshaft
Reduce vibrations caused by the crankshaft rotation
Balance the timing in the movement of the two groups of pistons

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Automobile Engineering in ME
An imbalance wheel during vehicle operation

Makes large noise when its heavy point hits the road surface
Deflects in the vehicle's longitudinal direction
Creates a standing wave
Bounces vertically or deflects from side to side (as seen from front or rear)

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