Answer:
Step-by-step explanation:
An internal combustion engine is a type of engine that burns fuel inside a cylinder to produce mechanical power. The power is then used to drive the wheels of a vehicle through a system of gears. There are two main types of internal combustion engines: spark ignition gasoline engines and compression ignition diesel engines1. Both types use a four-stroke cycle to complete one rotation of the crankshaft. The four strokes are:
Intake stroke: The piston moves down and draws a mixture of air and fuel (in gasoline engines) or only air (in diesel engines) into the cylinder.
Compression stroke: The piston moves up and compresses the air-fuel mixture (in gasoline engines) or the air (in diesel engines). A spark plug (in gasoline engines) or a fuel injector (in diesel engines) ignites the mixture, causing combustion.
Power stroke: The piston moves down as the hot, expanding gases push against it, creating mechanical power.
Exhaust stroke: The piston moves up and pushes the exhaust gases out of the cylinder.
This cycle is repeated for each cylinder in the engine. The number of cylinders can vary from one to twelve or more, depending on the size and power of the engine.