What is the function of a car flywheel?

[MacHeidi]

Car flywheel's primary function is to store energy and inertia outside the engine's power stroke. Below are relevant details: 1. Principle: Located at the power output end of the crankshaft, which connects to the transmission and power equipment. The flywheel has a large rotational inertia. Since the power strokes of each engine cylinder are discontinuous, the engine speed varies. When engine speed increases, the flywheel's kinetic energy rises, storing energy; when engine speed decreases, the flywheel's kinetic energy drops, releasing energy. 2. Other functions: The flywheel helps reduce speed fluctuations during engine operation. Additionally, the flywheel is marked with top dead center (TDC) indicators, used to calibrate ignition timing or fuel injection timing, as well as adjust valve clearance.