HS code-driven procurement strategies

List of contents of this article:

• 1,HS code-driven procurement strategies Gasoline engine, diesel engine, steam engine, which one is the most efficient and which one is the least efficient, why?
• 2, Chery can only be at the bottom of the 5 domestic engines with the highest thermal efficiency?
• 3, The latest engine thermal efficiency ranking has been released! The first is not Toyota

Gasoline engine, diesel engine, steam engine, which one is the most efficient and which one is the least efficient, why?

1. The gasoline engine has the highest efficiency, which is greater than the diesel engine, and the diesel engine is greater than the steam engine. But the power is the other way around. The steam engine is the largest, followed by the diesel engine, and finally the gasoline engine. The principle of the thermal engine is to convert the chemical energy of fuel into internal energy and then into mechanical energy. The thermal engine plays an important role in human life.

2. The thermal efficiency of diesel is higher than that of gasoline, and the calorific value of diesel is higher, so the volume of the same mass is burned to release more energy, and more work is done in the work stroke. Compared with gasoline, diesel is less volatile, more powerful and flammable, and the fuel economy of small diesel engines is one-third higher than that of gasoline engines.

3. The steam engine is the most primitive, so it is the least efficient! The gasoline engine is suitable for small machinery such as small cars, while the diesel engine is used to drive heavy machinery such as trucks. If there is not enough heat engine efficiency, it is impossible to drive such heavy machinery, so the diesel engine heat engine has the highest efficiency.

4. The gasoline engine is a quantitative adjustment load. The lower the load, the smaller the air intake, and the higher the residual exhaust gas coefficient. The residual exhaust gas coefficient of the diesel engine remains roughly unchanged when the low load changes. In addition to affecting the isentropy index of the gasoline engine, this factor also slows down the combustion speed of the gasoline engine and reduces the thermal efficiency.

Chery can only be at the bottom of the 5 domestic engines with the highest thermal efficiency?

The Blue Whale engine has more than 100 patented technologies, and has won the title of China's top ten engines for three consecutive years. The highest thermal efficiency of this engine can reach 40%, and the Blue Whale 4T high-pressure direct injection technology can output a peak of 260 Nm, and the peak output of Volkswagen EA 211 is only 250 Nm.

The third-generation Chery engine ranked second in the world, which is a 5T turbocharged engine. The thermal efficiency of this engine is NO.1 among domestic engines. The power and fuel consumption are the best among engines with the same displacement, and the requirements for oil products are not strict. As long as the fuel meets the standards, The engine can adapt to it.

First place: BYD Xiaoyun 5L thermal efficiency 43% This engine is not only the strongest in China, but also the most thermally efficient mass-produced engine in the world. In the past, BYD's three-electric technology can be said to be unique in the world, but engine technology has always been a shortcoming.

However, among many domestic car companies, one of the automobiles commented that Chery, known as the "technology geek", should be the strongest in the field of engine core technology.

The latest engine thermal efficiency ranking has been released! The first is not Toyota

1. First of all, let's take a look at the first echelon, that is, the engine with thermal efficiency of more than 40%.

2. Since its launch, the Red Flag HS5 has been unanimously praised by domestic consumers, which not only stems from the national pride given by the Red Flag brand itself, but also from the 0T it carries, which is famous for its high thermal efficiency. As the domestic engine with the highest thermal efficiency at present, its thermal efficiency is as high as 39%.

3. First: Chang'an NE 5T engine (40%) Chang'an NE 5T engine is the latest technical achievement of Chang'an Automobile's British R&D center. This engine has been mass-produced and is installed on the upcoming Chang'an UNI-T.