A four-stroke engine is a type of internal combustion engine that powers many vehicles, including cars and motorcycles. It operates in four distinct phases: intake, compression, power, and exhaust. During the intake phase, the engine draws in a mixture of air and fuel. Next, the piston compresses this mixture, making it more explosive. In the power phase, the compressed mixture ignites, pushing the piston down and generating power. Finally, during the exhaust phase, the engine expels the burnt gases. This cycle repeats continuously, allowing the engine to run smoothly and efficiently, making it a popular choice for many types of machinery and vehicles.