What is the difference between a 3-cylinder and a 4-cylinder engine?

[VanFelicity]

The difference between a 3-cylinder and a 4-cylinder engine lies in the number of cylinders: a 3-cylinder engine has three cylinders, while a 4-cylinder engine has four cylinders. The working principles of both 3-cylinder and 4-cylinder engines are as follows: 1. Compression stroke: The piston moves from the bottom dead center to the top dead center, with both the intake and exhaust valves closed; 2. Intake stroke: The piston is driven by the crankshaft from the top dead center to the bottom dead center, while the intake valve opens and the exhaust valve closes; 3. Exhaust stroke: The exhaust valve opens, and the piston moves from the bottom dead center to the top dead center, expelling exhaust gases as the piston rises; 4. Combustion and expansion stroke: Both the intake and exhaust valves close, the spark plug ignites, and the air-fuel mixture burns vigorously.