The flywheel is a disk-shaped part with a large moment of inertia, and it functions as an energy storage. For a four-stroke engine, work is performed every four piston strokes, that is, only the work stroke is used for work, and the three strokes of exhaust, intake, and compression consume work. Therefore, the external torque of the crankshaft changes periodically, and the crankshaft speed is also unstable. To improve this situation, a flywheel is installed at the rear end of the crankshaft.
At the power output of the crankshaft, that is, the side that connects the gearbox and the power equipment. The main function of the flywheel is to store energy and inertia outside the engine’s power stroke. A four-stroke engine has only one stroke of work to inhale, compress and exhaust energy from the energy stored in the flywheel. The balance is correct. The balance of the engine mainly depends on the balance block on the shaft. The single-cylinder machine has a balance shaft.
The flywheel has a large moment of inertia. Because the work of each cylinder of the engine is discontinuous, the engine speed also changes. When the engine speed increases, the kinetic energy of the flywheel increases to store energy; when the engine speed decreases, the kinetic energy of the flywheel decreases to release the energy. Flywheels can be used to reduce speed fluctuations during engine operation.
It is installed at the rear end of the crankshaft of the engine and has rotational inertia. Its role is to store the energy of the engine and overcome the resistance of other components to make the crankshaft rotate uniformly. The clutch is installed on the flywheel to connect the engine and the car transmission; Engine engagement for easy engine start. And is the integration of crankshaft position sensing and vehicle speed sensing.
During the power stroke, in addition to the external output, part of the energy transmitted by the engine to the crankshaft is absorbed by the flywheel, so that the speed of the crankshaft does not increase much. In the three strokes of exhaust, intake and compression, the flywheel releases its stored energy to compensate the work consumed by these three strokes, so that the crankshaft speed does not decrease too much.
In addition, the flywheel has the following functions: the flywheel is the active part of the friction clutch; the flywheel rim is inlaid with a flywheel ring gear for starting the engine; the flywheel is also engraved with a top dead center mark for calibration Ignition timing or fuel injection timing, and adjustment of valve clearance.