Main Parts of Automobile System | Basic Components or Parts of car.

When we think of cars, we often see them as a whole entity, a mode of transportation that can take us from point A to point B.

However, cars are much more than just a single object—they are complex machines made up of various mechanical and electronic components working together to create a functional vehicle. Understanding how a car works is important not just for mechanics and engineers, but for every driver as well.

Knowing how the different parts of a car work together can help identify problems early on and take preventive measures, ensuring your car is running smoothly and efficiently.

The main parts of a car are made to fit together well and work together as a whole. Each part is important to how the car works as a whole.

From the engine to the transmission, the suspension system to the brakes, and the electrical system to the tires, each part serves a specific purpose. Learning about the different parts of a car can not only help in identifying problems but also in maintaining the vehicle, ensuring it runs efficiently for years to come.

In this article, we will discuss the main parts of an automobile and their functions. We will explore each component in detail, providing an overview of how they work, their significance, and their contribution to the overall performance of the car.

Whether you are a car enthusiast, a mechanic, or just someone who wants to know more about the car you drive, this article will provide a comprehensive guide to the basic components of a car. So buckle up, and let’s explore the main parts of an automobile.

Watch this video completely before going to read the article ( within 8min you can learn completely)

Components or parts of Automobile.

An automobile has a number of parts. But there are six essential basic components of a car—parts of automobile. These are:
1. The Chassis.
2. The Engine.
3. The transmission system
4. The Suspension System
5. The Braking System
6. Body

Aside from these six fundamental parts of automobile, there are controls and auxiliaries.
The movement of the automobile or vehicle is controlled via controls. The auxiliaries are supplementary or additional components designed to bring comfort to the automobile user.

Top 9 Best design software for mechanical engineering|Everyone Should Learn

1. The chassis

Parts of Automobile

One of the parts of automobile is the chassis. The chassis of an automobile is essentially the framework of the vehicle that supports and holds all other components together. It is the backbone of the car, and its design and construction play a critical role in the vehicle’s performance, stability, and safety.

The frame, the suspension system, the steering mechanism, and the brakes are all important parts of the chassis. The frame of the chassis is usually made of steel or aluminum.

It is meant to be rigid and strong enough to hold the weight of the car and its people. The frame holds the suspension system, which is in charge of absorbing shocks and vibrations and making the ride smooth.

The steering mechanism, which is also attached to the frame, allows the driver to control the direction of the vehicle. The brakes, which are usually on each wheel, slow down or stop the car.
The design and construction of the chassis are very important for how well the car works.

A well-designed chassis can improve the handling and stability of the car, making it easier and safer to drive. It can also provide better protection for the driver and passengers in the event of a crash.

Modern chassis designs often use light materials like carbon fiber or aluminum to reduce weight and improve fuel efficiency.

They also have high-tech features like active suspension systems, which change the car’s suspension in real time to make it perform and feel its best.

Overall, the chassis of a car is a very important part that affects how well it runs, how safe it is, and how comfortable it is to ride in.

It is essential for car owners and enthusiasts to understand a car’s design and function to appreciate the engineering that goes into making it.

With advancements in technology and materials, the future of chassis design looks promising, with lighter, stronger, and more efficient designs on the horizon.

2. The Engine

Parts of Automobile

The second parts of automobile are the engine. The engine is the heart of your car, and it’s responsible for converting fuel into energy to power your vehicle.

The engine of a car is the source of power that gives the car the energy it needs to move. Most cars use an internal combustion engine (ICE) to convert fuel into mechanical energy.

The engine has several components, including cylinders, pistons, valves, and a crankshaft. A spark ignites the mixture of fuel and air in the cylinder, causing an explosion that pushes the piston downward and turns the crankshaft.

The engine’s power is transferred to the wheels through a transmission system. One critical aspect of the engine’s operation is the exhaust system, which removes the waste gases created during combustion.

The exhaust system typically consists of a series of pipes, a muffler, and a catalytic converter, which helps reduce harmful emissions.

The performance and efficiency of an automobile engine depend on several factors, including its size, design, and fuel efficiency. The engine’s power is based on its size, which is measured in cubic centimeters (cc). Bigger engines have more power. The number of cylinders and the way the valves are set up affect how well the engine runs and how much gas it uses.

For example, a four-cylinder engine is more fuel-efficient than a six-cylinder engine. The fuel injection system and the engine’s compression ratio are two other factors that affect fuel efficiency.

With the advancement of technology, hybrid, and electric engines are also becoming more common, offering even better fuel efficiency and reducing emissions.

The engine of a car or automobile system has several parts or components, including:


Pistons move up and down inside the engine block, compressing fuel and air to create combustion. During the intake stroke, the piston moves down in the cylinder and the intake valve opens.

Air and fuel are then drawn into the cylinder as the piston moves back up during the compression stroke. In the compression stroke, the air and fuel mixture is compressed by the upward movement of the piston.

When the piston reaches the top of its compression stroke, the spark plug ignites the compressed air and fuel mixture, creating an explosion that drives the piston back down in the power stroke. The energy produced during combustion powers the engine’s crankshaft.

During the exhaust stroke, the piston moves back up and the exhaust valve opens, allowing the burned gases to exit the cylinder. Once the gases are fully evacuated, the piston returns to the bottom of its stroke, and the cycle starts again. This process is known as the four-stroke cycle and is repeated for each cylinder in the engine block.

They’re connected to the crankshaft by connecting rods, which convert the linear motion of the pistons into rotational motion.


The crankshaft is the main rotating part of the engine. It converts the linear motion of the pistons into rotational motion, which is used to turn the wheels of the car. The crankshaft is typically made of durable materials like hardened steel, cast iron, or forged steel.

It is a long, cylindrical part with several offset crank pins, each of which connects to a connecting rod that connects to a piston. As the pistons move up and down in their cylinders, the crank pins rotate around the main bearing journals, generating rotational motion.

The crankshaft is attached to the engine block and is held up by at least three main bearings. The main bearings keep the crankshaft from moving around and reduce friction between the parts that move. The crankshaft is also balanced with counterweights to reduce vibration and improve engine efficiency.

The crankshaft is an important part of the engine that needs to be kept in good shape for it to work well. To keep the bearings and journals from wearing out and getting damaged, you need to change the oil and grease them regularly.

If the crankshaft is damaged or worn, it can lead to engine failure and costly repairs.


The camshaft controls the opening and closing of the engine’s valves, which allow air and fuel to enter and exit the engine.

As the camshaft rotates, its lobes push on the rocker’s arms, or lifters, which then move the valves up and down.

In an engine, the movement of the valves is timed with the movement of the pistons to make sure that the air-fuel mixture is burned correctly for the most efficiency and power.

Most modern engines have one overhead camshaft or two overhead camshafts. This means that the camshaft(s) is above the cylinder head, which makes it easier to control the timing of the valves and gives the engine more power.

The profile and timing of the camshaft lobes can also be customized for specific engine applications, such as high-performance racing engines or fuel-efficient engines.

Spark Plugs

Spark plugs provide the spark that ignites the fuel and air mixture inside the engine. They’re essential for starting the engine and keeping it running smoothly.

Spark plugs are small but critical components of an internal combustion engine, which powers most vehicles, boats, generators, and other equipment that runs on gasoline or other fuels.

The spark plug is responsible for creating a spark that ignites the fuel and air mixture in the combustion chamber, which produces heat and pressure that drives the pistons and crankshaft to turn.

In a typical four-stroke engine, the spark plug fires once every two revolutions of the crankshaft, or every other time the piston reaches the top of its stroke, known as top dead center (TDC).

For efficient combustion, high power output, and low emissions, the timing and strength of the spark must be just right.

This depends on how the engine is built, how it is running, and what kind of fuel is being used.

Spark plugs are typically made of a ceramic or metal shell, which houses a central electrode and a ground electrode.

The central electrode is made of a conductive material, such as platinum or iridium, that is resistant to wear and corrosion.

The ground electrode is located at the base of the shell and is connected to the engine block, which serves as the ground or return path for the electrical current.

When the ignition system sends a high-voltage electrical charge to the spark plug, it jumps across the small gap between the central and ground electrodes to create a spark that ignites the mixture of fuel and air.

The combustion process creates heat and pressure that quickly increase. This causes the piston to move down with a lot of force, which is sent to the crankshaft and then to the wheels or other machinery.

Over time, spark plugs can wear out or become fouled with carbon deposits, oil, or other contaminants, which can reduce their performance and cause misfires, rough idling, or reduced fuel efficiency.

So, it’s important to check and replace spark plugs according to the manufacturer’s instructions, which can vary depending on the type and quality of the spark plugs, the way the engine is built, and how you drive.

3. The Transmission System

Parts of Automobile

The transmission is responsible for transferring power from the engine to the wheels of the car. The transmission system in a car is in charge of getting the power from the engine to the wheels, so the car can move forward or backward.

Usually, a transmission system has a gearbox, a clutch, a driveshaft, and an axle. The power is transmitted through these parts.

The gearbox is the primary component of the transmission system, and it is responsible for controlling the amount of power transmitted to the wheels. The clutch is a mechanical device that engages or disengages the transmission from the engine, allowing the driver to change gears.

The driveshaft transfers the power from the gearbox to the axle, and the axle transfers the power to the wheels.

There are two types of transmissions used in automotive applications: manual and automatic. In a manual transmission, the driver must use a clutch pedal and shift gears manually to control the car’s speed.

An automatic transmission, on the other hand, uses a motor to shift gears automatically, making it easier for the driver to operate the vehicle. The transmission system is also closely connected to the steering system, which allows the driver to control the direction of the car.

The transmission system is a critical parts of automobile, and its design and operation affect the car’s performance and fuel efficiency. The number of gears in the transmission system,

for example, affects the car’s acceleration and top speed. Cars with more gears tend to be more fuel-efficient, as the engine can operate at lower RPMs, saving fuel. The weight of the transmission system also affects the car’s fuel efficiency, with heavier transmission systems leading to lower fuel efficiency.

Other factors that affect the performance of the transmission system include the type of clutch, the material used for the driveshaft, and the design of the axle.

By understanding the transmission system and its parts, car owners can make informed decisions about the auto parts of their car and ensure optimal performance.

The major parts of automobile (transmission system) are:


The gearbox contains a set of gears that transmit power from the engine to the wheels. By shifting gears, the transmission can change the amount of power being transferred, allowing the car to move at different speeds.


The clutch is a component that connects and disconnects the engine from the transmission. It allows the driver to change gears and control the speed of the car.

Drive Shaft

The drive shaft connects the transmission to the wheels of the car. It transfers power from the transmission to the differential, which then sends power to the wheels.


The axle is a very important part of the transmission system of an automobile. It sends the power from the engine to the wheels. The axle is a shaft that connects the two wheels of the vehicle and allows them to rotate at the same speed.

In most cars, there are two axles – a front axle and a rear axle—with each connected to the corresponding pair of wheels.

The design and material of the axle can affect the car’s performance and handling, with heavier axles providing more stability and lighter axles offering better fuel efficiency.

Overall, the axle is a crucial part of the automobile’s transmission system, contributing to the car’s performance and safety.

4. The Suspension System

Parts of Automobile

The suspension system is in charge of absorbing shocks and vibrations so that the driver and passengers can have a smooth ride.

The suspension system is an important part of a car. It connects the wheels to the car’s frame and makes the ride smooth and comfortable.

The suspension system is made up of springs, shock absorbers, struts, and control arms, which all work together to absorb the impact of bumps and uneven roads.

The springs are the main component of the suspension system, responsible for absorbing the shock and vibrations caused by bumps in the road. They come in various types, including coil springs and leaf springs, and are typically placed between the frame and the wheels.

The shock absorbers work in conjunction with the springs, dampening the bouncing motion of the car after hitting a bump.

The struts and control arms are also important parts of the suspension system. They connect the wheels to the chassis and make it easier to control and drive the car smoothly.

The suspension system is meant to give the driver and passenger’s stability and comfort by reducing the effects of bumpy roads and making sure the ride is safe and smooth.

A well-maintained suspension system also helps the tires and other parts of automobile or car last longer, making it an important part of automobiles or car’s overall safety and performance.

It has several components, including:

Shock Absorbers

Shock absorbers are designed to absorb the shock of bumps and rough roads. They’re filled with fluid and have a piston that moves up and down inside the cylinder, converting the kinetic energy of the shock into heat energy.


Springs support the weight of the car and help to absorb shocks. They come in different types, including coil springs, leaf springs, and air springs.


Struts are like shock absorbers, but they are also made to support the suspension system’s structure. They’re usually found in front-wheel-drive cars.

5. The Braking System

Parts of Automobile

The braking system is responsible for slowing down or stopping the car. The brake system is an important part of a car because it is what slows down or stops the car when needed.

Parts of the brake system include the brake pedal, brake lines, brake pads, brake calipers, and brake rotors.

When the driver steps on the brake pedal, it triggers a hydraulic system that pushes brake fluid through the brake lines to the brake calipers. The brake calipers then squeeze the brake pads against the brake rotors, creating friction that slows down or stops the car.

The car’s braking system is made to be reliable and effective so that in an emergency, the car can stop quickly and safely.

For the brakes to work well and keep you safe, they need to be checked and fixed regularly. This includes replacing worn brake pads and rotors. Accidents and injuries can happen when the brakes don’t work right, so it’s important to keep this part of the car in good shape.

It has several components, including:

Brake Pads

Brake pads press against the brake rotors to slow down or stop the car. They’re made of materials like ceramic, metallic, or organic compounds.

Brake Rotors

Brake rotors are the discs that the brake pads press against. They’re usually made of steel and are designed to dissipate heat quickly to prevent overheating.

Brake Calipers

Brake calipers hold the brake pads and press them against the brake rotors. They’re usually made of aluminum or steel.

6. Body

Parts of Automobile

The body of a car is the outside shell that covers the inside and holds the engine, transmission, and other parts. The body is made so that the car’s passengers are safe, comfortable, and like the way it looks. It also protects the car’s mechanical parts from damage.

Depending on the make and model of the car, the body is made of steel, aluminum, or plastic, among other things. The body is divided into various parts, including the hood, doors, roof, fenders, and trunk.

The joints and hinges that connect these parts make it easy to move them and get to the car’s interior and mechanical parts.

The body of the automobile is also designed to provide safety to passengers in the event of a collision. Modern cars have safety features like airbags, seat belts, and crumple zones that help absorb the impact of a crash and keep the people inside safe.

Overall, the car’s body is an important part of its design and performance. It helps make the car safer, more comfortable, and look better. A well-kept car body can also help the car last longer, making it an important part of how the car works as a whole.

Controls and Auxiliaries

Controls and auxiliaries are an essential part of an automobile, allowing the driver to operate the vehicle and access various features and functions. These components are designed to provide ease of use and convenience while ensuring safety and efficiency.

Controls in an automobile include the steering wheel, accelerator pedal, brake pedal, and gear shift lever. These controls allow the driver to steer the car, accelerate, brake, and shift gears. The placement and design of these controls are crucial to ensuring that the driver can operate the car comfortably and safely.

A car’s auxiliaries are its extra parts and functions that aren’t directly related to driving but make driving more comfortable and convenient.

These features include air conditioning, audio systems, power windows, and mirrors, among others. These auxiliaries are designed to improve the driving experience and provide additional functionality to the car’s passengers.

Modern cars often come with a range of high-tech controls and extras, such as GPS navigation, automatic emergency braking, and adaptive cruise control. These features are meant to make the driver and passengers safer and make things easier for them.

Leave a Comment