What is the working principle of a four-cylinder gasoline engine?
1 Answers
Four-cylinder gasoline engine working principle: The internal combustion engine connects the pistons of four cylinders to a crankshaft through connecting rods, and staggers the working processes of each cylinder. During each half-rotation of the flywheel, one cylinder is performing work while the other three cylinders are respectively performing intake, compression, and exhaust processes. The detailed principle is as follows: Engine: During the power stroke, high-temperature, high-pressure gas pushes the piston downward to perform work, converting internal energy into mechanical energy. The piston completes four strokes during its movement: Intake stroke, compression stroke, combustion and power (expansion) stroke, and exhaust stroke. When the piston moves downward, the intake valve opens, allowing filtered fresh air to enter the cylinder, completing the intake stroke. Piston: The piston moves upward with both intake and exhaust valves closed, compressing the air, increasing its temperature and pressure, thus completing the compression process. Fuel injector: The fuel injector sprays filtered fuel into the combustion chamber in a mist form, where it mixes with high-temperature, high-pressure air and ignites immediately. The resulting high pressure pushes the piston downward to perform work, rotating the crankshaft and completing the power stroke.
