Engine Parts Name and Their Functions

While checking or changing your engine oil, have you ever wondered what the components of an engine are? Every vehicle engine consists of several components that work in unison to produce power. The power is transferred to the transmission to move the vehicle.

An automotive engine is a finely tuned piece of engineering capable of traveling hundreds of thousands of miles.

Let’s draw back the curtain and look at the individual components that make up an automotive engine. I’ll also explain how they function with a brief description of each component.

Important Engine Parts Name and Short Descriptions

Here is the engine parts list, including their functions and brief descriptions.

Engine Cylinder Block

The engine block is the main part of an internal combustion engine. It holds the cylinders in their place. All the main functions of an engine, such as suction, intake, compression, combustion, and exhaust, take place in the engine block. The primary work of the engine block is to hold the piston and fuel.

The manufacturers mold the cylinders from cast steel or cast iron to withstand the high pressure and temperature generated during combustion. More precisely, the engine cylinder block has a high compressive strength.

Cylinder Head

What is a cylinder head? This is a common query among car owners. A cylinder head is the end cover or housing of an internal combustion engine.  It is mounted on top of the engine block. It houses essential components such as springs, lifters, and inlet and exhaust valves. And it contains more moving components than any other part of an engine.

The cylinder head contains passages that allow fuel and air to flow into the cylinder. These passages are known as tracts or ports. The manufacturer provides a metal or paper head gasket between the cylinder head and the engine block to ensure proper leakproofing.

Crankshaft

The crankshaft is the backbone of an internal combustion engine. It is the part that converts the piston’s linear motion into rotational motion. The crankshaft should have wear resistance and not be fatigued enough to ensure the engine reaches its shelf life.

The crankshaft has a flywheel connected to its rear end. The flywheel helps the engine transmit power to the transmission, which, in turn, moves the vehicle.

Camshaft

Like the crankshaft, the camshaft is another important part of the engine. It is a major mechanical component part of internal combustion engines (ICE). The main task of the camshaft is to open and close the exhaust and inlet valves at the right time. It connects to the crankshaft via a timing belt or chain.

Piston

The piston is a reciprocating part of an internal combustion engine. It converts the power released during combustion into mechanical work, carries out other essential tasks, and seals the combustion chamber. It is a crucial compression component that compresses the air-fuel mixture as it pushes upward, where the air-fuel ignites.

Piston Ring

Piston rings are crucial engine components that fit into the pistons to prevent leaks in the combustion chamber. Piston rings also carry heat away from the pistons into the cooled cylinder wall. Heat energy flows from the pistons’ grooves into the cylinder walls, where the engine coolant helps cool it. You can see them better on the car engine parts diagram.

Engine Valve

The engine valves are located in the cylinder head. They play an important role in the engine. Their main task is to let the air in and out. The air in the cylinder helps to ignite the fuel.

Without fuel ignition, the pistons will not move, and thus the vehicle will not start. There are two types of valves: intake and exhaust.

Timing Chain

The main function of the timing chain is to keep the components’ movement in parallel with the engine. The timing chain is located on the top of the engine and connects the camshafts and crankshafts.

It features several lobes all over its length as the camshaft spins, and valves open and close with the help of the lobes. This process enables air and fuel to enter the combustion chamber simultaneously. Some vehicles use timing belts instead of timing chains. Both the timing chain and belt have the same function.

Oil Pump

An oil pump is a crucial component for both small cars and heavy-duty vehicles. The oil pump circulates oil to the camshaft, sliding pistons, and rotating bearings while maintaining oil pressure. It helps lubricate and cool internal engine parts.

Oil Sump

The oil sump is often called the crankcase. The oil sump houses the engine oil. The oil pump sucks the motor oil from the sump and carries it to other engine parts for lubrication purposes. The oil returns to the oil sump from the lubrication points.

Engine Oil Filter

An oil filter is a device designed to trap contaminants and particles from engine oil that accumulate over time. Without an engine oil filter, the motor oil will accumulate contaminants, metal shavings, and other particles, which will accelerate wear on the internal engine parts. Every internal combustion engine has an oil filter. They come in different sizes and shapes.

Turbocharger

The primary job of the turbocharger is to compress more air flowing into the cylinders. Auto manufacturers design turbochargers to increase fuel economy and enhance overall engine performance. Some vehicles feature superchargers in place of turbochargers. There is very little difference between turbochargers and superchargers.

Exhaust Manifold

The exhaust manifold collects exhaust gases produced in the combustion chamber and directs them into the atmosphere through the exhaust pipe. In common sense, the exhaust manifold serves as a funnel used to collect emissions. Exhaust manifolds are made of stainless steel or cast iron.

Inlet Manifold

The inlet manifold is the opposite of the exhaust manifold. The exhaust manifold collects exhaust gas from cylinders and blows it through the exhaust pipe. On the other hand, the inlet manifold supplies air/fuel mixture to the cylinder. The primary function of this device is to evenly distribute the air/fuel mixture to the intake ports.

Carburetor

The carburetor is a major component of the internal combustion engine. Its main function is to mix the air and fuel in a specific ratio for an internal combustion engine. It ensures that the air-to-fuel mixture is at the correct ratio. Though carburetors are found on older car models.

Throttle Body

A throttle body is a part of the air intake system. It controls the amount of air going into the engine. They are only available in fuel-injected engines. When a driver depresses the gas pedal, the throttle body opens, allowing more air into the engine. This will increase the engine speed.

Radiator Fan

The radiator fan is an engine fan that draws air into the engine bay, which in turn cools the radiator. The radiator fan is crucial for maintaining the engine at normal operating temperature and ensuring the cooling system functions as it should.

Radiator

The Radiator is a heat exchanger. It is an essential part of the cooling system that uses a mix of antifreeze and water to keep the engine at normal operating temperature. It supplies cool coolant to the engine and collects hot coolant from the engine. It then cools the hot coolant before sending it back to the engine.

Thermostat

The thermostat is an essential component of the cooling system that regulates engine temperature. It prevents the engine from overheating or undercooling. When you start your vehicle, the thermostat remains closed, preventing coolant from going to the engine. As soon as the engine reaches normal operating temperature, it opens and allows coolant to flow into the engine.

Fuel Injector

The fuel injector is a major component of the fuel delivery system. The fuel injectors receive fuel from the fuel pump. It then atomizes the fuel before injecting it into each cylinder. It, however, receives instructions from the car computer about when and how to adjust the fuel pressure it sends to each cylinder.

Different Types of Sensors

Every car engine features several sensors, especially in the newer models. And these sensors play different roles and tasks. Some of the most important car sensors in automotive engines are:

Spark Plug

The spark plug delivers a spark to ignite the compressed air-fuel mixture in the combustion chamber. Without the spark plugs, a gasoline engine will not start.

Flywheel

I mentioned earlier that the engine transmits power to the transmission. The flywheel is the connection that transmits and interrupts power between the engine and the transmission. It also stores mechanical energy to balance the engine, which improves its performance.

Mechanical energy is the power produced during combustion. The flywheel balances the engine by storing mechanical energy.

Turbo Intercooler

The turbo intercooler is an air-cooling intake device. It is mainly found on supercharged and turbocharged engines. The main task of the turbo intercooler is to cool down compressed air with the turbo or supercharger.

Fuel Injection Pump

The fuel injection pump is a crucial component of the fuel delivery system in diesel engines. The function of the fuel injection pump is to send fuel into each cylinder in a diesel engine. However, the process of delivering diesel affects engine performance, noise characteristics, and emissions.

Conclusion

The list above includes engine parts and brief descriptions. This information is important for understanding how your car engine works. These components work in harmony to ensure efficient, seamless engine operation. If one of these components fails, it may cause the engine to stall or fail to start.

Common signs of a failed engine include low engine power, check engine lights, annoying noises, and odd odors. If you see these signs, the most prudent action is to visit an experienced mechanic for a check-up. Ignoring the signs may lead to further damage, resulting in costly repairs or replacements.