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What is the difference between an excavator engine and a car engine?


What is the difference between an excavator engine and a car engine? It looks similar, can they be used interchangeably? Many machine friends are more interested in this issue, so let's discuss it together today. Generally speaking, due to the different use environments and conditions, the operating principles of automobile engines and construction machinery engines (referred to as industrial machines) are different. Excavator Engine:
The excavator needs to run continuously when it is working, and it also needs to deal with various complex emergency conditions, but it does not require high speed.
Work machines require more continuous and constant power operation conditions, and require high reliability of continuous operation: the acceleration performance is not high, and they are all high-speed operation conditions (loaders and vehicles are relatively special, and there are many acceleration and deceleration conditions. ) because there is no car
The machine can be cooled by the wind, and has high requirements for cooling performance and low requirements for emissions. car engine:
In daily life, our requirements for dry cars are to be fast, stable, and able to cope with short-term harsh road conditions: In addition, the cooling conditions of automobile engines are more complicated, and they need to face long-distance uphill and downhill, and have requirements for emissions and noise. stricter

It has high requirements for economical use. Therefore, for the vehicle machine, we require the characteristics of good acceleration, large reserve power, steep torque curve, and large reserve torque.

According to the working conditions and usage requirements of the above engines, the two types of machines have different characteristics.
1, the calibration speed is different
The calibration speed of the car engine is high, because the car machine does not often run in the high-speed area for a long time, while the industrial machine needs to run in the high-speed area frequently;
2. The governor control is different
The resistance of the car is predictable, such as: bad roads, steep slopes, etc.; and the load changes of excavators are unpredictable in many cases, such as excavation, it is impossible to know what the underground geology or ground conditions are, so the engine of the excavator is unpredictable. Use full speed governor control.
Therefore, under the control of the traditional oil pump mechanical governor, the vehicle engine is controlled by a two-stage governor, while the engine is controlled by the full-range governor. Although the acceleration response is not as flexible as the two-pole governor, the engine has the ability to overcome the positive force. two-level senior
3. Different noise reduction requirements
Automobile engines have higher requirements on dry drop. For dry sound, car machines can often be written on the muffling of exhaust emissions and sound shielding to reduce the emission of drinking sound. As long as the sound does not exceed the standard in the specified parts, it can pass the acceptance.
The excavator engine does not have strict requirements in this regard, and with the sound of landing and landing, it can only work hard!
4. Different weight requirements of the machine
For the power and weight ratio of the dry machine, the car requires a smooth and light driving, so the vehicle machine requires light weight to reduce the curb weight of the car and reduce fuel consumption
However, the excavator does not have high requirements on this point due to the work demand, and sometimes even needs to increase the counterweight.