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How does a gasoline engine work
2021-11-12
The working principle of a gasoline engine mainly involves generating kinetic energy by burning the fuel in the cylinder, which drives the piston to move back and forth, and then outputs power through the connecting rod and crank. Its working process is mainly divided into four strokes:
Intake stroke: The piston moves down, the valve opens, and outside air enters the cylinder through the intake passage.
Compression stroke: The piston moves upward, compressing the air entering the cylinder while closing the intake valve. Through compression, the volume of air decreases, while its temperature and pressure increase, providing conditions for subsequent combustion.
Power stroke (de-knocking stroke): At the end of compression, the ignition system ignites the mixture (a mixture of gasoline and air) injected into the cylinder. The combustion of the mixture generates high-temperature and high-pressure gas, which drives the piston to move downward.
Exhaust stroke: The piston moves upward again, pushing out the already burned exhaust gas, opening the exhaust valve and expelling the exhaust gas from the engine.
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