Four Stroke Internal Combustion Engine, Four Stroke Cycle Explained
Four stroke gasoline/petrol engines use four strokes of a piston to complete one combustion cycle. The four strokes are: intake, compression, power, and exhaust.
Intake stroke: The piston moves down, drawing air into the cylinder via the air intake valves.
Compression stroke: The piston moves up, compressing the air within the cylinder.
Power stroke: Fuel is injected and a spark plug ignites the air-fuel mixture, causing a controlled explosion. The expanding gases force the piston downwards.
Exhaust stroke: The piston moves up, forcing the exhaust gases out of the cylinder via the exhaust gas valves.
The four strokes repeat themselves over and over again, generating power, then transferring it to the load.
Learn how crank angle degree plays an important role in your engine's performance, how the ECU controls air-fuel ratio & ignition timing, and what variable valve timing and variable valve lift are.
In the video we will learn how an automobile engine works, on the example of the structure of a four-stroke, gasoline (petrol) internal combustion engine. We will talk about many parts and subsystems of an engine: crank mechanism, valve timing mechanism, operation cycle, engine firing order, ignition advance angle, fuel-air mixture and more.
Four Stroke Internal Combustion Engine, Four Stroke Cycle Explained
Four stroke gasoline/petrol engines use four strokes of a piston to complete one combustion cycle. The four strokes are: intake, compression, power, and exhaust.
Intake stroke: The piston moves down, drawing air into the cylinder via the air intake valves.
Compression stroke: The piston moves up, compressing the air within the cylinder.
Power stroke: Fuel is injected and a spark plug ignites the air-fuel mixture, causing a controlled explosion. The expanding gases force the piston downwards.
Exhaust stroke: The piston moves up, forcing the exhaust gases out of the cylinder via the exhaust gas valves.
The four strokes repeat themselves over and over again, generating power, then transferring it to the load.
Learn how crank angle degree plays an important role in your engine's performance, how the ECU controls air-fuel ratio & ignition timing, and what variable valve timing and variable valve lift are.
In the video we will learn how an automobile engine works, on the example of the structure of a four-stroke, gasoline (petrol) internal combustion engine. We will talk about many parts and subsystems of an engine: crank mechanism, valve timing mechanism, operation cycle, engine firing order, ignition advance angle, fuel-air mixture and more.
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