Four stroke engine?

A four-stroke engine, also known as a four-cycle engine, is a type of internal combustion engine that completes a power cycle in four distinct strokes of the piston within the cylinder. The four strokes are intake, compression, combustion, and exhaust. Here's a brief overview of each stroke:

1. Intake Stroke: The piston moves downward, creating a partial vacuum in the cylinder. The intake valve opens, allowing a mixture of air and fuel to enter the combustion chamber from the intake manifold.

2. Compression Stroke: The piston moves upward, compressing the air-fuel mixture. Both the intake and exhaust valves remain closed during this stroke.

3. Combustion Stroke (Power Stroke): When the piston reaches the top of the compression stroke, the compressed air-fuel mixture is ignited by a spark plug. The rapid combustion of the mixture creates a high-pressure gas that forces the piston back down with significant force. This downward motion is what generates power in the engine.

4. Exhaust Stroke: After the power stroke, the piston moves back up, pushing the exhaust gases out of the combustion chamber through the open exhaust valve. The exhaust stroke completes the cycle and prepares the engine for the next intake stroke.

The four-stroke engine provides several advantages, including greater fuel efficiency, smoother operation, and lower emissions compared to two-stroke engines. It is widely used in various applications, from automobiles and motorcycles to generators and small machinery.

It's important to note that this is a simplified overview of the four-stroke engine operation. The actual internal workings involve various components, such as valves, crankshaft, connecting rods, and a camshaft, which work in harmony to complete the four-stroke cycle and convert chemical energy into mechanical power.