Understanding How an Automobile Engine Works

Let us dive 100 years into the past and recollect the state of the transportation system. In the past, everybody used horses and cart to travel around. The world was neither advance nor connected back then.

Question: What has changed now? Which invention revolutionized the world?

Answer: The invention of the technological miracle called vehicle and Engine revolutionized the world.

Automobiles today are an essential piece of life everywhere throughout the world, helping humans to excel towards a bright future.

Automobiles are aiding us in moving merchandize across the globe, harvesting resources, transporting humans, and many more. However, as a whole, automobiles are most importantly improving the qualities of our life.

Albeit a wide range of vehicles have been made to do various things. Over the wide assorted variety of vehicles, the vast majority of them have developed into having fundamentally the same framework. Indeed, frameworks, such as the braking framework, is significantly important, yet it plays out a similar role in every other vehicle. However, the framework that entirely distinguishes one vehicle from another is the engine. The engine is the building block of the vehicle defining its major capacities.

Have you at any point opened the hood of your vehicle and pondered what was happening in there? What all those mechanical parts are for? What makes the wheels of your vehicle rotate? Where is all that energy coming from?

How about we investigate the engine in detail and understand how it functions!


The journey of wheels might have started 5500 years ago until this day of technologically advance Bridgestone UAE tyre service centre, yet the invention of automobiles in 1885 by German inventor Karl Benz (1844-1929) completed the pieces of the puzzle and made it all possible. The automobile gave an exponential boom to advance transportation and global connectivity.

In spite of the fact that Karl Benz was the one who invented the car, another German engineer, Nikolaus Otto (1832–1891), was the one who successfully invented the heart of vehicle known as “four-stroke Engine” in 1872.

What is the Engine?

If we learn more about the framework of the vehicle, we come to realize that there is greater hand at work. The engine is what beats like a heart under the hood of every automobile.

In order for a vehicle to move, it needs energy. The engine produces that energy by converting fuel (chemical energy) into mechanical motion (mechanical energy). Mechanical energy is generated by the engine via an internal combustion process. Most engines produce mechanical energy in four-stroke combustion cycles, which include the following:

  1. Induction, a mixture of fuel and air move into the cylinder via the intake valve
  2. Compression, mixture inside the cylinder is compressed via piston head
  3. Ignition, the mixture inside the cylinder is ignited via spark plug
  4. Exhaust, after igniting of the mixture the burnt gases are discharged via exhaust valve.

Following are fuels are used in an engine:

  • Petrol
  • Diesel
  • Propane
  • Natural Gas

Engines are what maintain the rotational motion of those reliable continental tyres in Dubai or any other city with the splendid road. So ride that you enjoy is all because of an engine.

The bodily structure of Engine

Let us understand the bodily structure of the engine in order to better perceive the working of the engine. Following are the fundamental components of an engine:

Engine Block

The fundamental foundation of the engine is known as the engine block, it typically made up of the aluminium, and however, iron is also utilized. In terms of structure, the engine block contains huge hollow cylinders that are why engine block is also referred to as the cylinder block. These cylinders are basically a placeholder for the piston to move up and down. The more cylinders an engine has the more energy it will be able to produce.

Apart from cylinders, different conduits and paths are incorporated within the engine block that takes into consideration oil and coolant to stream to various pieces of the engine.

Combustion Chamber

The combustion chamber is the pivot point of the engine. It’s the chamber where fuel and air mixes to make a small-scale explosion that moves the piston up and down in a continuous cycle, hence generating the mechanical energy to move vehicle.

Cylinder Head

The cylinder head is a bit of metal that is used over the cylinder in the engine block. It is used to form a space cast in the cylinder head to make room for combustion.

Other engine components such as spark plug, valves, and fuel injectors are implanted into the cylinder head.


At the point when fuel ignites in the combustion chamber, the expanding gases push the piston hence moving the crankshaft.

On the highest point of the cylinder, you’ll discover three or four rings cast into the piston. The piston rings are the part that really is in contact with the walls of the combustion chamber. The pressure rings are the top rings and they press outward on the walls of the combustion chamber to give a solid seal. The oil rings are the base rings on a cylinder, it keeps oil from leaking into the combustion chamber. It likewise wipes overabundance oil down from the walls of the combustion chamber and once more into the crankcase.


The crankshaft changes the over-all movement of the piston into a rotational movement that enables the vehicle to move. The crankshaft regularly fits the long way in the motor square close to the base. The crankshaft works in the association with the timing belt, which interfaces with the camshaft and conveys mechanical energy to different pieces of the vehicle.

The crankshaft dwells in what’s known as the crankcase on a motor. The crankcase is situated underneath the cylinder block. That is also the place where your motor’s oil is put away.

Balancing lobes are along with the crankshaft that goes about as stabilizers to adjust the crankshaft and avoid overall engine harm from the wobbling that happens when the crankshaft turns.


The crankshaft through a timing belt works with camshaft to ensure the valves open and close mechanism at the right time for ideal engine execution.

This précised control of opening and closing valves is performed via egg-shaped lobes.

There are two camshafts in the V-shaped engine. One camshaft controls one side of valves, and the other camshaft controls the opposite side.

Timing Belt

The crankshaft and camshaft synchronize by the means of a planning belt or chain. The timing belt ensures that camshaft and crankshaft are in relative position all the time.


The valvetrain controls the activity of the valves. The valvetrain comprises of:

  • Lifters
  • Pushrods
  • Rocker Arms
  • Valves


There are two sorts of valves, the intake and outtake valve.

Intake valves bring a blend of fuel and air into the ignition chamber. Outtake valves let the fumes that are made after the ignition out of the combustion chamber.

The quantity of the valves might vary in vehicles, in order to optimize the performance of the engine.

Rocker Arms

Rocker arms are little switches that are used in opening the valve to let air into the combustion chamber or allowing fumes to out. Only one operation is performed at a time.

Fuel Injectors

Fuel injectors are used to inject fuel into the combustion chamber. There are three types of fuel injection systems:

  • Direct Fuel Injection
  • Ported Fuel Injection
  • Throttle Body Fuel Injection.


Over every cylinder in an engine block, there is a sparkplug. It is used to ignite the air and fuel mixture via spark.

How does the engine work?

At the point when your vehicle needs to move and generate mechanical energy, you “feed” it fuel. Much the same as humans but instead of fuel we eat food.

With the process known as “internal combustion,” the engine converts chemical energy from a fuel into mechanical energy to get the vehicle going. Controlled small scale explosion takes place inside a sealed combustion chamber to generate mechanical energy.

In the event that you initiate a small-scale explosion, inside an enclosed chamber, for example, a combustion chamber in an engine, a tremendous measure of energy is discharged in the form of the expanding gas. In the case of the engine, such gases push the piston hence moving the vehicle. This combustion cycle takes place 100 of times per minute in order to maintain the rotational motion of the wheels.

At the point when the energy from the principal explosion inside the combustion chamber has nearly run out, another explosion happens. This makes the piston to move once more. The cycle proceeds over and over, giving the vehicle the mechanical energy expected to rotate the wheel and keep the vehicle moving.

Engines utilize a four-stroke combustion cycle as discussed in ‘what is engine?’. The strokes are rehashed again and again, generating mechanical energy.

Let us now overview of what occurs during each combustion cycle.

First of all, the process of intake takes place, during the intake cycle the mixture of fuel and air is injected via intake valve into the combustion chamber and the piston moves down. This starts the cycle by bringing air and gas into the engine.

Secondly, compression takes place. As the compression cycle starts, the piston goes up and compresses the air and fuel. A little space implies all the more powerful and effective explosion.

In the third phase, the combustion takes place. The spark plug generates the spark that ignites the compressed mixture and detonates the mixture like an explosive. The intensity of the blast once again pushes the piston down generating mechanical energy.

Lastly, the residue gases are exhausted. During the last piece of the cycle, the exhaust valve opens to discharge waste gas generated as the result of the explosion. This gas is moved to the exhaust system, where it is filtered for harmful gases, finally, it leaves the vehicle through the tailpipe.

Following are the gases the residue is are made up of:

  • Carbon dioxide
  • Carbon monoxide
  • Formaldehyde
  • Hydrocarbons
  • NMOG
  • NOx



You should need to realize what is happening inside your vehicle, basically to straighten your understanding of the vehicle. Also, you need to be well educated while making a vehicle purchase, repairing your vehicle, customizing it or upgrading it.

However, modern electric engines might change the perspective of how engines will work in the future.

News Reporter
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