What is the main working cycle of a v8 engine?

The main working cycle of a V8 engine is the four-stroke Otto cycle, repeated in each of its eight cylinders. While there are eight cylinders firing in a specific sequence for smooth power delivery, the fundamental process within each cylinder is identical:

1. Intake Stroke: The piston moves downward, drawing a mixture of air and fuel into the cylinder through an open intake valve.

2. Compression Stroke: Both intake and exhaust valves close. The piston moves upward, compressing the air-fuel mixture. This increases the temperature and pressure, preparing it for ignition.

3. Power Stroke (Combustion): Near the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture. The rapid expansion of the burning gases forces the piston downward, producing power.

4. Exhaust Stroke: The exhaust valve opens. The piston moves upward, pushing the spent gases out of the cylinder through the exhaust valve.

This four-stroke cycle repeats continuously in each cylinder, albeit with a staggered timing to ensure smooth power delivery and minimize vibrations. The precise timing of each stroke and the firing order of the cylinders are carefully designed to optimize engine performance and efficiency.