Post: How a car engine starts, cools, and circulates air.

Now you know how and why an engine stays cool. But why is air circulation so important? Most cars have naturally aspirated engines, which means air passes through the air filter directly into the cylinders. High-performance, modern fuel-efficient engines are either turbocharged or supercharged, which means the air entering the engine is first pressurized (so that more of the air/fuel mixture can be squeezed into each cylinder) to increase performance. The amount of boost is called the boost. Turbochargers use a small turbine connected to the exhaust pipe to spin a compression turbine in the incoming airflow. Superchargers are connected directly to the engine to spin the compressor.
Engine Cooling, Air Intake, and Starting Systems. The cooling system in most cars consists of a radiator and a water pump. Water circulates in passages around the cylinders and then flows through the radiator to cool it. In a few cars (most notably the Volkswagen Beetle before 1999) and most motorcycles and lawn mowers, the engine is air-cooled (you can tell an air-cooled engine by the cooling fins adorning the outside of each cylinder to help dissipate heat). Air cooling makes the engine lighter but hotter, often reducing engine life and overall performance.
Improving engine performance is great, but what exactly happens when you turn the key to start the engine? The starting system consists of an electric starter motor and a starter solenoid. When you turn the ignition key, the starter motor spins the engine a few revolutions, starting the combustion process. A powerful motor is needed to spin a cold engine. The starter motor must overcome:
Because a turbocharger reuses hot exhaust gases to spin the turbine and compress the air, it increases the power of a small engine. As a result, a fuel-efficient four-cylinder engine can reach the horsepower of a six-cylinder engine while improving fuel economy by 10 to 30 percent. All the internal friction caused by the piston rings. The compression pressure of any cylinder that is on the compression stroke. The energy required by the camshaft to open and close the valves
All the other things that are directly connected to the engine, such as the water pump, oil pump, alternator, etc.
Because of the large amount of energy required and the fact that cars use a 12-volt electrical system, hundreds of amps must flow into the starter motor. The starter solenoid is essentially a large electronic switch that can handle a lot of current. When you turn the ignition key, it activates a solenoid valve to power the motor.