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 (established in 1951, a famous brand product in China and a well-known trademark in China, one of the largest independent diesel engine production bases in the world, Guangxi Yuchai Machinery Group Co., Ltd. China well-known trademark, China famous brand, national high-tech enterprise, the most competitive brand, Wuxi Diesel Engine Factory of faw liberation Automobile Co., Ltd.)

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

5. Quanchai (established in 1949, China well-known trademark. Anhui famous trademark, Anhui Top 1 Enterprises, Anhui Quanchai Group Co., Ltd.)

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

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

8. CNPC Jichai (in 192, China was a well-known trademark, one of the earliest manufacturers of diesel engines in China and one of the most influential brands in the industry, Jinan Diesel Engine Co., Ltd.)

Extended information:

The advantages of diesel engines 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.

Reference: Diesel Engine _ Baidu Encyclopedia