

It is to be noted that there is no requirement pre-mixing of fuel and oil. Therefore the power is produced in every four-strokes of the piston. The spark plugs fire only once during one next revolution. It consists of one compression stroke and then one exhaust stroke, afterward each will have a return stroke. In such type of engine, the piston completes its two-strokes during each revolution.

It is to be noted that such engines require the oil to be pre-mixed in with the fuel. The spark plugs fire once in every single revolution, and therefore power is produced once in every 2-strokes of the piston. Then after the return stroke, the exhaust is let out and hence a fresh fuel mixture moves into the cylinder. It consists of a compression stroke followed by the explosion of the compressed fuel. In such type of engine, the entire combustion cycle is completed with only one piston stroke.

3.1.1 FAQs about two-stroke and four-stroke: What is a two-Stroke engine?
