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Flywheel in an Engine

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Flywheel in an Engine

October 3, 2025


Flywheel in an Engine
The flywheel is a heavy rotating disc connected to the crankshaft. Its main purpose is to:
1. Stabilize Power Delivery

• During the engine cycle, power is produced only on the power stroke.
• The flywheel stores energy from the power stroke and releases it during intake, compression, and exhaust strokes → making motion smooth and continuous.
2. Maintain Steady Motion

• Reduces engine vibrations and fluctuations in speed.
• Provides rotational inertia so the crankshaft keeps spinning evenly.
3. Assist in Starting

• Has gear teeth around its rim that engage with the starter motor to crank the engine.
4. Clutch Function

• In manual cars, the flywheel provides a friction surface for the clutch disc to engage and disengage power.

In simple words: Without a flywheel, your engine would shake and stall with every stroke. It’s the silent hero that keeps things running smoothly!