Minimizing duties via HS code optimization

List of catalogs of this article:

• 1,Minimizing duties via HS code optimization Is the self-aspirated engine more fuel-efficient or the T-engine?
• 2, What are the types of air jet engines?
• 3, Air-powered cars have been invented for many years. Why haven't they been popularized yet?
• 4, intake engine: naturally aspirated engine
• 5, Constructural principle of aerodynamic engine

Is the self-aspirated engine more fuel-efficient or the T-type engine?

Then the turbocharged engine is more fuel-efficient. The absolute power output of the 4T turbine engine can reach the level of the naturally aspirated 0-5L engine, and the torque platform of the turbine engine is wider. When driving, the engine speed can be kept low, so that the engine is in the high efficiency range.

Compared with the 5 naturally aspirated engine, the 0t engine consumes less fuel in theory, and the 5 naturally aspirated engine consumes more fuel. However, in different road conditions and different driving methods, the fuel consumption of 0t can still be driven higher than the 5 naturally aspirated engine. Next, let's make a comparison with the same brand and the same model.

It's better to choose a naturally aspirated engine. Compared with turbocharged engines, naturally aspirated engines have lower fuel and maintenance costs and a longer service life.The only point is that the power output is relatively flat. Is there a difference in the maintenance of turbocharged engines and naturally aspirated engines? However, there is a certain difference in maintenance.

L The engine performance is stable and reliable, but the fuel economy is not very good. Therefore, Volkswagen gradually eliminated this engine and widely adopted the 5L self-aspirated engine. After matching the 5L self-aspirated engine, the fuel consumption of the vehicle decreased significantly.

What are the types of air jet engines?

1. For example, broadcasting 787 and so on. Another type is the stamping engine. The wood has a compressed air fan, so it is relatively small and generally used for missiles. However, because there is a wooden compressed air fan, the initial speed of about two Maches must be used when starting, relying on the special shape of the intake airway and the high speed to press the air.

2. It can be roughly divided into two categories, air-suction engines are abbreviated as intake engines and rocket jet engines. Classification details There are two common classification principles of aircraft engines: the principle of whether the air participates in the engine work and the engine generates propulsion power.

3. It seems that it will be a great military advantage for any country to have aircraft that can be quickly manufactured with jet engines. As a result, the Germans produced the first flyable jet, Heinkel He178, in 1939. Britain then had the Glouster E-28 in 1941.

4. Classified according to the cooling method: Internal combustion engines can be divided into water-cooled engines and air-cooled engines according to different cooling methods.

Air-powered cars have been invented for many years. Why haven't they been popularized yet?

1. However, compared with electric vehicles laid out and fuel cell vehicles laid out in China, air vehicles have no advantages: low technical maturity, no supporting industrial chain, and market acceptance is self-evident.

2. In the year, French engineer Gury Negre obtained a patent for a compressed air-powered engine. Its working principle is to use the high-pressure compressed air stored in the car to drive the piston movement in the engine cylinder and drive the car forward. This is the closest to the real air-powered car.

3. At present, vehicles equipped with aerodynamic devices also mainly adopt the hybrid drive mode. The aerodynamic device can recycle the idle energy wasted when idling and the kinetic energy wasted when braking, convert it into compressed air and store it in the energy accumulator, so as to reduce the high discharge generated by the engine start. Release.

4. First of all, the gas source is insufficient, and the west gas is lost to many cities, and the use of civil gas is often limited. In addition, when LNG is stored, after the pressure is increased at room temperature, the pressure must be drained, once the vehicle is stopped for a long time.

Aspirated engine: naturally aspirated engine

Naturally aspirated engine is more suitable for drivers who pursue smooth driving and comfort.

There is no supercharging device for the naturally aspirated type, which means that the air is only through the "accelerator" air filter (usually not the "accelerator") (the oil absorber "cylinder"), and gasoline is directly injected into the intake manifold through the fuel injector (usually electronic fuel injection. Now the latest technology is a jet cylinder, which represents Volkswagen Maiteng).

According to different power sources, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle electric motors and hybrid engines, etc. According to the working mode of the air intake system, it can be divided into four types: natural intake, turbocharging, mechanical supercharging and double supercharging.

The structural principle of an aerodynamic engine

The working principle of an air engine is as follows: its engine uses compression technology to compress the air and store it in the cylinder. The engine is plugged in and inflated for 4 hours. The average speed is 80 kilometers per hour, and you can walk for 10 hours. Working principle: shock absorption and tire gas production.

The principle of aerodynamic vehicles: rn The current concept of aerodynamic vehicles mainly focuses on the use of compressed air (or other gases) to drive the vehicle forward, and its principle of action is also very simple.

The aerodynamic machine is composed of multiple gas working systems, each of which includes liquefied gas storage irrigation, evaporator, heat exchanger, engine, condenser, high-pressure pump and control mechanism.

Therefore, it is very important whether the appearance design of the vehicle conforms to the relevant aerodynamics, otherwise the car will be greatly reduced in terms of "stability" and "economy" of fuel.

The working principle of the aircraft engine The working principle of the turbine engine The working principle of the turbine engine is to drive the turbine to rotate continuously through the sprayed fuel, generating a jet thrust to push the aircraft. The turbine engine is divided into two parts: low-pressure airway and high-pressure airway.