Automobile Engineering in ME
The function of a connecting rod is

To transmit motion of the piston to the crankshaft
To drive the drive plate
To turn the flywheel
To drive the fuel pump

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

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

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