Explain the key components and functions of an internal combustion engine.

An internal combustion engine is a type of heat engine that converts the chemical energy stored in fuel into mechanical energy through a series of controlled explosions within a confined space. The key components of an internal combustion engine include the cylinder block, piston, connecting rod, crankshaft, valves, spark plug, fuel injection system, and intake and exhaust systems. Each component plays a crucial role in the overall functioning of the engine. The cylinder block serves as the main structure of the engine and houses the cylinders, which are cylindrical chambers where the combustion process takes place. The pistons are cylindrical components that fit tightly within the cylinders and move up and down in response to the combustion forces. The connecting rods connect the pistons to the crankshaft, which converts the ....