Torque fluctuations and power impulses originating in an internal combustion engine are smoothed out by__________________?
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Answer: D. flywheel
Explanation
A heavy flywheel stores rotational kinetic energy during power strokes and releases it during non-power strokes. This continuous energy storage and release mechanism effectively smooths out cyclical engine torque fluctuations. Engine crankshaft acceleration and deceleration rates are moderated by the massive rotational inertia of the flywheel. Internal combustion engines generate power intermittently during the expansion stroke of the thermodynamic cycle. Rotational inertia allows heavy flywheels to resist sudden changes in angular velocity across engine cycles. Flywheel sizing depends on the number of cylinders, engine configuration, and allowable speed fluctuation limits.
Automotive and industrial engines require flywheels to deliver smooth, continuous power output to transmission systems. Without a flywheel, reciprocating engines would experience severe vibration, jerking motion, and stalling. Mechanical design engineers calculate precise flywheel mass moments of inertia to ensure smooth operational stability. A governor regulates average engine speed under varying load conditions rather than smoothing instantaneous torque pulses. The crankshaft transmits mechanical power from pistons but requires a flywheel to dampen rotational speed variations. A gearbox multiplies torque and changes gear ratios rather than eliminating individual engine power impulses.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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