Automobile Engineering in ME
The main function of a resonator is that it

Regulates the intake air temperature
Regulates the intake air flow rate
Reduces the intake air noise
Enhances intake efficiency

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

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

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