What is the difference between turbo and naturally aspirated
What is the difference between turbo and naturally aspirated？
Many friends will have this experience when they go to buy a car. When introducing a car's power system, car salesmen often say that the car is equipped with a turbocharged engine or a naturally aspirated engine, but many Friends who buy a new car don’t know what the difference is It is a naturally aspirated engine, what are the advantages and disadvantages of both of them.
First of all, what is a turbocharged engine?
A turbocharged engine is actually an air compressor. It uses the exhaust gas discharged from the engine as power to drive the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which compresses the fresh air sent by the air filter pipe and sends it into the cylinder. When the engine speed is accelerated, the exhaust gas discharge speed and the turbine speed are also accelerated simultaneously, the degree of air compression is increased, the intake air volume of the engine is increased accordingly, the output power of the engine can be increased, and the horsepower of the car also increases. big.
What is a naturally aspirated engine？
The naturally aspirated engine relies on the pressure of the cylinder to inhale the outside air into the cylinder. Without a forced air intake device, a vacuum is generated when the piston moves down. At this time, the external atmospheric pressure is greater than the pressure in the cylinder, and the air enters the cylinder from the high pressure to the low pressure. That's why it's called naturally aspirated.
Advantages of turbocharged engines (i.e. disadvantages of naturally aspirated engines)
First, high efficiency and strong power. For a car of the same displacement, a turbocharged engine can compress more air, increase the amount of fuel injection, and make the fuel more sufficient. The direct impact is greater horsepower and more power.
Second, emission control, improve fuel economy and reduce exhaust emissions. Due to the sufficient fuel, in terms of emission control, turbocharging is easier to reduce emissions than naturally aspirated, especially the emission per unit of carbon dioxide. This is why European carmakers have stepped up efforts to develop turbocharged engines.
Third, fuel saving, mainly because a small-displacement turbocharged engine can output higher power than a naturally aspirated engine at the same level, which saves fuel consumption in disguise.
Disadvantages of turbocharged engines ((i.e. advantages of naturally aspirated engines)
First, the technology is immature and the stability is poor. Turbocharged engines have turbo lag from the beginning to the end. When you step on the accelerator, there will be a delay in speeding up, because the exhaust gas turbocharger needs the exhaust gas of the engine to drive. When you step on the accelerator, the turbocharger It did not improve work efficiency immediately, and it took more than two seconds to respond. The naturally aspirated engine is easier to complete, and because of its simple structure, uniform torque distribution, and linear acceleration, it has more advantages than turbocharged engines in terms of ride comfort, durability, stability, and safety.
Second, the price is expensive, because the turbocharged engine of the same level has a higher power than the naturally aspirated engine, and the turbocharged engine technology is not very mature, resulting in a car with a turbocharged engine than a naturally aspirated engine. The car is more expensive.
Third, the lifespan is low. The turbocharged engine is affected by pressure and temperature during operation, and its interior will be affected to varying degrees. Long-term accumulation will reduce the lifespan of the engine, and a certain degree of cooling and cooling are required when starting and stopping. Lubrication, compared to the natural aspirated engine life is much longer.
In general, the two engines have their own advantages and disadvantages at present, but with the development of turbocharged engine technology, it has gradually become the mainstream of automobile assembly.
