Turbocharger technology -- the differences between petrol and diesel turbochargers

30-11-2021

Turbocharger technology -- the differences between petrol and diesel turbochargers


People often ask us about the difference between diesel engine and petrol engine turbocharger in terms of working methods and uses. The following article will discuss this issue for everyone.


||The commonality between the two:


The first thing to know is that whether it is a petrol engine or a diesel engine with a turbocharger, the common basic principle is the same.

 

The idea behind any forced air intake device is to increase the amount of air and fuel entering each combustion chamber of the engine to provide additional power from each explosion. Similarly, the basic design and components of petrol and diesel turbochargers are almost the same.


||The difference between petrol engine and diesel engine:


The most important difference between petrol engine and diesel engine is that their combustion mode is completely different, petrol engine is premixed flame spread combustion, diesel engine is mainly diffuse combustion. Because of their different combustion patterns, petrol and diesel engines differ greatly in their efficiency and emissions.


Petrol Engine


Petrol engine is also known as ignition engine. It is an engine that injects Petrol into the intake pipe and mixes with air to form a combustible mixture before entering the cylinder. It is ignited and burned by a spark plug to perform work. It uses Petrol as fuel to convert internal energy into kinetic energy.


Diesel Engine:


Diesel engines are also known as Diesel engines. The origin of this name is because diesel engines are compression ignition engines and the inventor is R. Diesel. A diesel engine is an engine that burns diesel oil to obtain energy and release it.


||What is the impact on turbochargers?


Diesel Engine:


The inherent disadvantage of a diesel engine is that it is difficult to draw enough air into the combustion chamber, but turbocharging can indeed help the engine solve this problem.

For commercial diesel engines, the goal is to increase the air flow of the engine rather than increase the combustion pressure, which means that traditionally, for commercial diesel engines, the overall pressurizationprovided by the turbocharger is very low, between 5 and 8 psi.

In practice, this means that diesel turbochargers are usually larger than gasoline turbochargers, and the turbine part is larger, which can handle a large amount of exhaust gas, but also needs to provide enough intake to keep the cylinder full.


Petrol Engine:


For Petrol engines, the purpose of increasing turbocharging is to increase the power of the engine, so the goal is to increase the pressure in the combustion chamber, which means that the turbocharger tends to be smaller, and it is designed to run at a higher RPM, providing a higher pressure boost without significantly increasing the airflow.

In addition, since Petrol engines need to operate over a wider RPM range, it is important that Petrol turbocharger accelerate faster than diesel engines.

 

Thats the difference between a diesel engine and a Petrol engine, in terms of how they work and what they turbocharger.


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