1. Brand of diesel engine:

1. Weichai (founded in 1946, a famous brand in China and a well-known trademark in China, one of the top 5 Chinese enterprises and one of the earliest diesel engine manufacturers in China, Weichai Power Co., Ltd.)

2. Yuchai (in 1951, a famous brand product in China and a well-known trademark in China, the world's largest). Guangxi Yuchai Machinery Group Co., Ltd.)

3. Xichai (started in 1943, China famous trademark, China famous brand, national high-tech enterprise, the most competitive brand, Wuxi Diesel Engine Factory of faw liberation Automobile Co., Ltd.)

4. Shangchai (started in 1947, China famous brand, China famous trademark, high-tech enterprise, state-controlled listed company, top ten diesel engine brands, Shanghai Diesel Engine Co., Ltd.)

5. Quanchai (established in 1949, China famous trademark, national key high-tech enterprise, Anhui famous trademark, Anhui Top 1 enterprise, Anhui Quanchai Group Co., Ltd.)

6. Chang Chai (China famous trademark, China famous brand product, large listed company, one of China's most influential brands, China 5 most valuable brand, Chang Chai Co., Ltd.)

7. Cummins (founded in the United States in 1919, one of the largest independent engine manufacturers in the world, a large multinational company, top ten diesel engine brands, Cummins (China) Investment Co., Ltd.)

8. CNPC Jichai (in 192, China was a well-known trademark, one of the earliest diesel engine manufacturers in China and one of the most influential brands in the industry. Jinan diesel engine co., ltd.)

2. Model of diesel engine:

1. 48 engine: 4-cylinder bore 8 48 engine has a general power of about 45~5KW, a horsepower of about 6~68, and a general load of 1~2 tons;

2. 485 engine: The general power of a 4-cylinder 85 485 engine is about 47~65KW, the horsepower is about 6~8, and the general load is 2~4 tons;

3, 49 engines: the general power of a 4-cylinder 9 49 engine is about 67KW-75KW, the horsepower is about 91-12, and the general load is 4.6 tons;

4, 41 engines: 4-cylinder 41 engines with a bore of 1 generally have a power of about 78KW-12KW, a horsepower of about 16-13, and a general load of 7-8 tons;

5, 412 engine: the general power and horsepower of 4-cylinder 12 412 engine are slightly higher than 41.

Extended information

The advantages of diesel engine are large torque and good economic performance. Each working cycle of diesel engine also goes through four strokes: intake, compression, work and exhaust.

However, because the fuel used in diesel engine is diesel, its viscosity is higher than that of gasoline, and it is not easy to evaporate, but its spontaneous combustion temperature is lower than that of gasoline, so the formation and ignition mode of combustible mixture are different from that of gasoline engine.

The main difference is that the mixture in the cylinder of diesel engine is compression-ignited rather than ignited. When the diesel engine works, air enters the cylinder. When the air in the cylinder is compressed to the end, the temperature can reach 5-7℃ and the pressure can reach 4-5 atmospheres.

when the piston approaches the top dead center, the high-pressure pump on the engine injects diesel oil into the cylinder at high pressure, and the diesel oil forms fine oil particles, which are mixed with high-pressure and high-temperature air, and the diesel oil mixture spontaneously burns, violently expands, and generates explosive force, which pushes the piston downward to do work.

At this time, the temperature can reach 19-2℃, and the pressure can reach 6-1 atmospheres, resulting in great torque, so diesel engines are widely used in large diesel vehicles.

Baidu Encyclopedia: Diesel Engine