4 stages of combustion10/31/2023 In petrol or diesel engines each vertical movement of the piston either upwards or downwards is called a stroke. There are two valves at the top of the cylinder, an intake valve and an exhaust valve, and a fuel injector or spark plug between the two valves. A piston is a cylinder inside the engine which is connected to a rod that is used to move the piston vertically inside the engine cylinder in a gas-tight fit. A cylinder is where the combustion takes place. It is worth mentioning the main individual components in an engine cylinder. Each stage is shown in Figure 1 below which describes a four-stroke diesel engine or petrol engine. These include intake, compression, combustion, and exhaust. When it comes to the analysis of engine cycles, there are four stages. These four strokes are repeated continuously to generate power and convert chemical energy into mechanical energy. These four-stroke cycles include four strokes starting with intake, compression, combustion expansion, and exhaust. Internal combustion engines operate on a four-stroke cycle also known as the engine cycle.
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