Automotive technology is developing more and more every day, becoming more useful, efficient and environmentally friendly. With the ever-changing understanding of transportation and change, the most modified part of a vehicle is the engine. There are many types of engines, and depending on the type of vehicle, the most suitable engine is used. The most curious of these engines is the naturally aspirated engine. The atmospheric engine has the feature of working by using the air of the environment in which the car is located. We told you what a naturally aspirated engine is, is it a turbo or aspirated, which is better and how aspirated works. Let’s start by answering the question, what is a naturally aspirated engine.

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What is a naturally aspirated engine?

Most internal combustion engines used in the automotive industry are still naturally aspirated. Atmospheric engines are engines that work by directly sucking air or an air-fuel mixture into a combustion chamber located in the cylinder of internal combustion engines when the piston moves. The performance of naturally aspirated engines is determined only by the amount of air sucked into the combustion chamber by the piston. Atmospheric engines do not have such high performance as supercharged and turbo engines. Atmospheric engines have state-of-the-art technology thanks to single point, direct injection and multi-point systems. Now that we have learned what a naturally aspirated engine is, let’s look at the characteristics of a naturally aspirated engine.

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Characteristics of the naturally aspirated engine

The machine

Atmospheric engines have more complex components than new generation engines in terms of technology. These engines have more power and combustion chamber volume to deliver the desired performance. The tax, fuel consumption and production cost of a car engine with high power and volume are increasing. For this reason, car manufacturers avoid large engines. Today, cars with small volume, low fuel consumption and high performance are more in demand.

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How does a naturally aspirated engine work?

What is a naturally aspirated engine

Atmospheric internal combustion engines operate using only the air of the environment in which the vehicle is located. Atmospheric engines take in and use the fuel and air in the cylinder thanks to the piston. In this case, the performance and power of the engine are related to the air pressure perceived by the piston. Air or a fuel-fuel mixture is sucked into the combustion chamber under vacuum. These engines absorb 1 bar of atmospheric pressure and are transferred to the cylinders for combustion. Therefore, the fuel entering the engine under conditions of high temperature and high pressure generates energy by external ignition.

What is the difference between naturally aspirated and turbocharged engines?


Turbocharged engines are even more preferred than naturally aspirated engines. The main reasons for this are small cylinder displacement, high air pressure and less complex engine components compared to atmospheric pressure. In addition, the cost of fuel for turbo engines is much less than for naturally aspirated engines. Turbo engines produce more power than naturally aspirated engines by using smaller cylinders. Thus, a more efficient principle of operation arises. But naturally aspirated engines also have many advantages. Atmospheric engines are more environmentally friendly as they only use the vehicle’s energy. In addition, in the case of some car brands, the use of naturally aspirated engines minimizes engine damage.

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