What's the difference between naturally aspirated, supercharged and twin-turbo? When the naturally aspirated engine is running, the intake at the intake end is caused by the negative pressure generated by cylinder combustion, which is called natural inhalation. Mechanical supercharging means that the engine adds a supercharger under the condition of natural inhalation, and uses the engine's own power to drive the supercharger to blow air into the cylinder, thus providing more oxygen to help the fuel in the cylinder burn, thus improving the power. Double turbocharging, the first thing to know is turbocharging. Turbocharged engine is to supercharge the turbocharger on the engine, use the exhaust gas of the engine to drive the turbine, and use the turbine to blow air into the cylinder to achieve the purpose of providing more air. Double turbocharging means installing two turbochargers. There is also a single turbine and double scroll tube, that is, a turbocharger and two pipes blow air into two cylinders of four cylinders respectively to achieve a more efficient purpose. There is also double supercharging, that is, there is both mechanical supercharging and turbocharging. Both superchargers are supercharged by the engine. Mechanical supercharger is responsible for increasing power at low speed, and turbosupercharger is responsible for increasing power at high speed.
Simply explain, the specific things can't be finished, too abstruse and too professional. That's about it.
What's the difference in performance among naturally aspirated, supercharged, turbocharged and double supercharged? Can't say which one is superior, each has its own advantages, it depends on how the car factory does it.
Natural inhalation is very simple, and the engine itself will be even and smooth from beginning to end without any delay.
Turbocharging uses exhaust gas to drive another blade to supercharge, which will save more fuel than mechanical supercharging, because it uses exhaust gas instead of providing power alone, but the problem is that there will not be so much exhaust gas at low speed, so the effect will not be obvious, but it is often the power that is most needed at low speed.
Mechanical supercharging uses a separate system or the engine itself to provide supercharger power, which is different from turbocharging in power loss and fuel consumption, but the supercharging effect will be obvious no matter what speed.
High-end cars usually use machinery or a combination of machinery and turbines to make up for their shortcomings.
Naturally aspirated, turbocharged and supercharged have their own advantages and disadvantages. Self-priming linearity is good, turbocharging and mechanical explosive force are good. Personally, I like self-inhalation, and most of them run over and inhale naturally with large displacement.
Supercharged sports car, naturally aspirated, twin turbocharging, what's the difference between them? Mechanical supercharging relies on the engine's power to drive the supercharger, so it will consume part of the engine's power, so the power is poor in the low-speed area, but the power output when entering the high-speed area is endless. Double turbocharging is divided into series and parallel. Series connection is to reduce turbine delay and quick response. The parallel output is large, and the power is strong when accelerating. The output of naturally aspirated engine is smoother and faster than that of supercharged engine, but the power output is lower and cannot be as linear as that of turbine engine.
How to choose turbocharging for naturally aspirated turbocharging is to add a turbine shell on the basis of self-suction.
Mechanical supercharging is to add a belt on the basis of self-suction.
Self-priming is king, and the technology is stable and reliable
Turbocharging, mechanical supercharging, natural inhalation, which power is better, must be supercharged! Boost is the increased intake pressure. With more intake air, more fuel can be injected, and the power will come up, which can also improve combustion and fuel economy. Turbocharging and mechanical supercharging have their own advantages and disadvantages. Turbocharging generally refers to exhaust gas turbocharging, that is, the high-temperature gas discharged from the engine is used to drive the turbine, and the turbine then drives the supercharger, so as to achieve the purpose of turbocharging. Its advantage is that it can make full use of energy and improve fuel economy, that is, save fuel, but the reaction is slow, because the turbine needs exhaust, and the turbocharger can work better only if the engine works stably. For example, if your car suddenly accelerates, the turbocharger will have to wait for a while to respond. Mechanical supercharging directly uses the mechanical energy of the engine to drive the supercharger. Compared with turbocharging, it has the advantage of timely response, but the fuel economy is not as good as turbocharging!
What's the difference between turbocharging and mechanical supercharging? Turbocharging (turbocharging)
Short for Turbo, if you see Turbo or T at the rear of the car, it means that the engine used in the car is a turbocharged engine.
Turbocharger is actually a kind of air compressor, which increases the air intake by compressing air. Is the use of starting.
The inertia impulse of the exhaust gas from the engine drives the turbine in the turbine chamber, which in turn drives the coaxial impeller, which pressurizes the air sent by the air cleaner pipeline and makes it enter the cylinder. When the engine speed increases, the exhaust speed and the wheel speed also increase synchronously, and the impeller compresses more air into the cylinder. With the increase of air pressure and density, more fuel can be burned, and accordingly, the output power of the engine can be increased by increasing the fuel quantity.
The biggest advantage of turbocharger is that it can greatly improve the power and torque of the engine without increasing the engine displacement. Generally speaking, the engine power and torque with turbocharger will increase by 20%-30%. The disadvantage of turbocharger is lag, that is, due to the inertia of impeller, it reacts slowly to the sudden change of throttle, which makes the engine delay to increase or decrease the output power, and it will feel a little lag for a car that wants to suddenly accelerate or overtake.
Super charger (supercharger)
Aiming at the low intake efficiency of naturally aspirated (NA) engine in high-speed region, we should start with the most basic key point, that is, find ways to increase the air pressure in the intake manifold to overcome the valve interference resistance. Although the dimensions of intake manifold, valve and camshaft remain unchanged, the air that can be squeezed into the combustion chamber every time the valve is opened increases due to the increase of intake pressure, so the fuel injection quantity can also be relatively increased, which makes the working energy of the engine more than that before supercharging.
Turbocharging and mechanical supercharging
Simply put, the engine keeps running and generates power because gasoline enters the combustion chamber, mixes with air to form an oil-gas mixture, which is ignited by a spark plug, and the pressure generated by combustion pushes the piston to generate power. Finally, the burned waste gas is discharged to the outside through the exhaust valve and then circulated.
This process can be divided into four parts (Otto cycle)
1. Intake stroke
2. Compression stroke
3. Combustion (or power) stroke
4. Exhaust stroke
For details, please refer to the junior high school physics textbook (P if there is any), so I won't explain it in detail here. It is worth mentioning that the rotary engine is also designed according to this Otto cycle specification, but its mechanical structure is very different from others, so it can generate great power with a small displacement.
How to improve the efficiency of engine? According to the law of conservation of energy, to improve the efficiency of the engine, we can only use more energy-intake, compression, combustion and exhaust-and what engineers can do is to improve these four parts. Among them, TURBO and Super Charger are designed for the' air intake' link (nothing can be changed except exhaust, and the effect is not great).
The turbine rotates its turbine (exhaust rotor) by using the exhaust gas discharged from the exhaust stroke. When the turbine reaches a certain speed, it drives the intake rotor (coaxial with each other, with different chambers) and forcibly sucks in excess air, so the ordinary engine is called natural air intake (NA) because the turbine is "unnatural", haha.
Super charger:
The difference between Super Charger and TURBO is that its intake rotor is directly driven by the crankshaft of the engine through a belt, so compared with TURBO, it is "all the way" and works as long as the engine is started.
Ok, let's start to compare the advantages and disadvantages of the two:
-Price:
On the same engine, there is little difference between the two (here refers to the general product, which is difficult to compare with the performance of supercharged machinery), so the price is usually not considered.
-Efficiency:
This is the biggest advantage of turbocharging, because turbocharging is only driven by exhaust gas. Compared with the engine-driven super charger, it does not waste part of the engine power and is more economical and fuel-efficient.
-delay:
This is the biggest disadvantage of TURBO (the famous TURBO lag effect) and the biggest advantage of Super Charger, because you can't start the compressor until the Turbo reaches a certain speed (about 12000RPM). Although the time is short, it is very uncomfortable for the driver. Imagine that when you step on the accelerator again, it passes 1-. The super charger, the aforementioned "all the way", works as long as the engine is on without any delay.
-Heat dissipation:
Because the TURBO compressor is in the exhaust pipe (very hot place! ), plus its ultra-high speed running bearing (1above 2000 rpm! ), the resulting high temperature and high pressure are inevitable, and measures such as oil cooling/water cooling and mechanical switch/computer pressure relief need to be taken to ensure the safety of the car. In addition, almost all turbocharged vehicles must have an intercooler (central cooler) device. Because there is more compressed air, the temperature rises and the density decreases, that is, the oxygen content decreases (back to the physics book), and the combustion efficiency decreases. Therefore, it is necessary to use intercooler to reduce the air temperature. The problem with the super charger is much smaller. Generally speaking, the boost level (boost series? The intercooler is not used for pressures below 10 psi (pounds per square inch).
-Noise:
The structure of the turbine determines that it produces less noise than the supercharger, because the turbine is installed in the exhaust pipe of the turbine, and the supercharger ... exaggerates the whole equipment and exposes it above the hood (see fast &; The black dodge Charger in Fury-Speed and * * *) is very noisy, but many people just like it!
Power output:
Generally speaking, the turbine is dominant, and the peak power turbine is stronger than the super charger, but the high-power TRURBO needs to modify other parts of the engine.
-Installation:
The turbine is more complicated, because some parts have to be put into the exhaust system, and an intercooler is added.
-stability:
Generally speaking, the super charger is better, and the rotor of the exhaust pipe of the turbine car may have many problems because it is still overheated after the flameout, so I won't say much here.
What's the difference between turbocharging and mechanical supercharging? Turbocharging which is more violent, it can only be started at a certain speed, that is, its reliability and durability are not as good as that of machinery. Mechanical supercharging is involved at idle speed, and the torque is low, but its performance is not as good as that of turbocharging.
What's the difference between mechanical supercharging and turbocharging? Turbocharging is explosive, but it needs to reach a certain speed to take effect, and mechanical supercharging is soft ~
The main difference between supercharger and turbocharging is that supercharger is always working, unlike turbocharging, which has a feeling of explosion. Moreover, the advantage of mechanical supercharging lies in the middle and low speed, and the advantage of turbocharging lies in the middle and high speed.
1, what is mechanical pressurization?
Mechanical supercharging does not rely on the energy of exhaust gas to compress air, but is connected with the crankshaft through a mechanical air compressor, and the power of the engine crankshaft drives the air compressor to rotate to compress air. The compressor compresses air through the relative rotation of two rotors and the energy of crankshaft rotation. Mechanical supercharging will cause a certain degree of loss of engine output power.
2. What are the advantages and disadvantages of 2.supercharge?
Because the supercharger is always boosting, its torque output is also excellent at low engine speed. In addition, because the air compression increases linearly according to the engine speed, the whole engine operation process is very similar to that of naturally aspirated engine, and the acceleration is very linear. However, due to the huge power loss of the engine at high speed, the function of supercharger at high speed is not obvious.
To sum up, the supercharger is suitable for driving occasions that do not need high-speed operation, and the turbocharger is suitable for driving occasions that need strong power, which is the difference between them. I hope I can help you!