Development trend of working principle of four-stroke internal combustion engine

The four-stroke internal combustion engine has four strokes when working, namely, intake stroke, compression stroke, power stroke and exhaust stroke.

A four-stroke engine cycles continuously between these four strokes.

During the intake stroke, the piston will move downward to suck in air or combustible mixture, at which time the intake valve will open and the exhaust valve will close.

During the compression stroke, the intake and exhaust valves will be closed and the piston will run upward to compress the combustible mixture.

In the power stroke, the intake valve and exhaust valve are closed, and the spark plug will ignite at this time, so that the combustible mixture will burn. The burning combustible mixture will push the piston downward and make the engine output power.

In the exhaust stroke, the intake valve is closed, the exhaust valve is opened, and the piston moves upward to discharge the exhaust gas generated by combustion.

A diesel engine is similar to a gasoline engine, except that it has no spark plug and is compression ignited during the power stroke.

Diesel oil is different from gasoline in nature.

There are many cars on the market that use turbocharged engines. The working principle of turbocharged engine is the same as above, but the intake mode is different.

The turbocharger of a turbocharged engine can compress air and then blow it into the engine cylinder.

Turbocharged engines are more powerful than naturally aspirated engines.

Million car purchase subsidy