tachometer for diesel engine

• 2022-04-28

Diesel machine is contraction ignition type. The so- called diesel machine refers to the machine with diesel as the power source. It's a machine that releases the heat energy in diesel and converts it into mechanical energy. Diesel machine is characterized by large low- speed necklace, energy saving and high thermal effectiveness (about 5 advanced than gasoline machine on average). Its disadvantages are rough operation and high noise. As the energy of diesel machine, the robotic combustion point of diesel is low, only 220 ℃, which can be contraction burned at the end of contraction; At the same time, due to the high distillation range of diesel in the refining process, which is generally between 180 - 370 ℃, it's delicate for diesel to pulverize and dematerialize, and it's also delicate to form a invariant combustive admixture with air; In addition, diesel canvas has high density and high spicy value, but the combustion speed is slow.

Listen to the sound, because the diesel engine is compression ignition. So it's loud and powerful. Look at the structure. Diesel cars don't have spark plugs. You can open the fuel tank cap, which is written on the back of the fuel tank cap. Diesel is diesel.

When you enter the car and look at the tachometer for diesel engine , you can see that the red area is more than 4000, which is diesel, and most gasoline vehicles are more than 7000. The maximum speed indication of the tachometer of gasoline vehicles can be as high as 7000 ~ 8000 revolutions, individual models can be as high as more than 10000 revolutions, and the maximum speed of single cylinder motorcycles can be as high as more than 15000 revolutions; However, the maximum speed of the tachometer of diesel vehicles is generally about 4000 rpm, and the maximum speed of the tachometer of trucks is only 2800 rpm, and the most economical speed range is generally about 1500 rpm of tachometer for diesel engine , which is not recommended to be used in the high speed range.

Due to the slow combustion speed of diesel, the uneven mixing of diesel and air and the complex combustion process of diesel, the speed of diesel engine is generally not very high. If a high-speed diesel engine is forcibly designed, it will lose its own advantages. However, although the speed of the diesel engine is low, the torque is sufficient, so the gearbox with large speed ratio can be configured to improve the final output speed through the gearbox. Therefore, although the speed of the diesel engine is low, the speed of the diesel vehicle is not low.