Why is the power of current agricultural tractors not as good as that of previous tractors?

Let's talk about traction first: Besides horsepower, the most important factors of tractor traction are tractor self-weight and tire size. Tractors with the same horsepower level are generally lighter than old tractors, so the traction performance is far less than that of old cars. This can be made up by adding counterweight and replacing wide tires. At the same time, the rated power of Shanghai 60 tractor is 60 HP, and the engine speed of Shanghai 4 100 is 2200 rpm. The same is 60 horsepower, the displacement is different, and the engine reserve power is different. It is the same 4 105 engine as the Dongfanghong 75 horsepower tractor produced in recent years, with a nominal speed of 2400 rpm, but the speed and fuel supply are improved, so the engine torque is not improved, and it is also 60 horsepower at 2000 rpm. It is also feasible to buy a 75-horsepower one as 60 horsepower. Torque is what agricultural machinery often says, that is, what farmers often say is stupid power, not just horsepower. Just like a car, one mouth is 100 horsepower, why is it not as strong as a small four-wheel? At present, the target of tractors is generally reserve power rather than 12 hour rated power, so tractors with the same horsepower are not as powerful as classic cars.

At that time, the 180 small four-wheel tractor produced in Jiangxi saved fuel; Jinda runs fast, too, and it is also started by electricity. 180 is 18 horsepower. Man is the primary productive force. The key is to be honest and do well. Up to now, there are still 180 tractors made in Jiangxi, which are very easy to use regardless of rotation. There used to be 28 types; Type 40; Type 50 tractor. Tractors and trucks such as 70, 80 and 260“260 HP "produced now are much lighter than in the past, and the counterweight is not effective in pulling goods lightly, sometimes slipping and not very fuel-efficient. Not in a few years. The main problem is people's heart. If the tractor is done too well, the price will definitely increase. Agriculture cannot frequently replace agricultural machinery. Farmers don't change for years, and manufacturers starve to death.

Now we use EFI and other technologies. On the one hand, we should pay attention to fuel economy, on the other hand, we should pay attention to environmental protection. Therefore, the oil pump of the old car is relatively extensive, and the torque of blowing the throttle is also great. Therefore, after adopting new technology, the overall structure of new cars needs to be optimized to make up for the problem of insufficient traction and torque of the whole car, but many domestic cars have not done this yet. Classic cars are full of energy, but their efficiency and effect are not necessarily good. It is necessary to realize this. High fuel consumption, difficult driving and more serious land compaction are the shortcomings of old cars. Now the new product basically eliminates many shortcomings of the old car. Therefore, the lack of new car strength is only relative, not a bad thing.

There are three main reasons why the agricultural tractors produced in the last century are powerful: First, they are self-righteous. Second, traffic. The third speed is low.

1. In 1970s and 1980s, China's industry was still relatively backward in western developed countries. There is no advanced processing machinery. The product is "rough and bold". The processing and casting of industrial products are relatively backward, and it is difficult to achieve "small but refined". Coupled with transportation considerations, some artificial counterweights were added. Self-esteem will naturally increase.

Secondly, based on the national conditions of China at that time, agricultural tractor transportation was also a helpless move. The self-weight is light, and traction cannot realize the function of the vehicle. As for the current agricultural machinery, it is mainly based on farm work, and its self-weight is relatively light. This is one of the reasons.

Third, because the design of agricultural vehicles in the 1970s and 1980s was influenced by tradition, technology and vehicles themselves, the speed was not high. The power will naturally be great. Needless to say, knowledge of physics. Modern agricultural vehicles have a single purpose and pursue economic and practical purposes between benefits. The speed is higher than before, and the intensity is naturally not as great as that of agricultural machinery in the past.

Finally, it is not that the current engine is not good, but that the quality and technical level of the current engine are better than those of classic cars: fuel saving, easy starting, low noise, smooth operation and so on. It doesn't matter whether the new car is strong or not compared with the old one of the same level. You can buy a 120 horsepower 100 horsepower. The important thing is that the car bought will bring benefits to the mechanic.