Can a local train go to the Sichuan-Tibet line?

Ordinary cars can run, not cross-country, so the car is completely qualified. As for power reduction, it can be divided into naturally aspirated engines and turbocharged engines. From two aspects, the power reduction of the traditional naturally aspirated engine is inevitable; For turbocharged engines, there is almost no reduction in power! Many friends want to know if their cars can travel to Tibet. There are two doubts. One is the influence of high altitude environment on vehicle dynamics, and the other is whether the road conditions are suitable for vehicles with low chassis. In fact, most roads in Tibet are paved now. Ordinary cars can run completely, not cross-country. So the car is completely qualified. As for power reduction, it can be divided into naturally aspirated engines and turbocharged engines. From two aspects, the power reduction of the traditional naturally aspirated engine is inevitable; For turbocharged engines, there is almost no reduction in power! Influence of high altitude on naturally aspirated engine. The influence of high altitude on the power of naturally aspirated engine is inevitable. There is no doubt about it; According to the description in middle school textbooks, the atmospheric pressure will drop by 10% for every kilometer of elevation, which theoretically means that the air volume and power entering the combustion chamber will drop by 10% respectively. It can be simply understood that at the height of 1000m, the limit of natural inhalation is reduced by 10%, in other words, it can only reach 90% of the limit power, but don't worry, the life of a car can't reach several limits, so 90% of the power is enough for you (the specific power parameters need to be seen. If the displacement is too low, the power is too low and the altitude is too high, it will still have a great impact. At present, most cars are equipped with electronic throttles, which can be automatically corrected according to the actual oxygen content of the air. For example, an ordinary area needs to release a certain amount of electricity. Open the throttle at 3 degrees. At high altitude, you still step on the same throttle depth, but the electronic throttle will automatically increase the opening according to the actual oxygen reduction, and make up for the shortcomings of low oxygen content by adding air; So lowering the altitude of naturally aspirated engine only limits the power, but it won't affect you as long as you don't use the power limit! For a simple example, if you are at an altitude of 3000 meters, the atmospheric pressure will be reduced by 30%, and the final power will be reduced by 30%, which means that you can only play 70% of the power level in the plain area, but in fact you only need 50% of the power. In this case, it is difficult for you to feel the impact on vehicle power; But for some weak self-priming, there will still be an obvious sense of power weakening, which depends on the altitude and the power of the car!

Altitude has little effect on turbocharged engine, and there will be a slight power drop at high speed. The plateau air pressure decreases, but the ambient air pressure inside the engine does not decrease, so the exhaust pressure discharged into the manifold after the exhaust valve is opened is not low, but this part is equivalent to the exhaust pressure in the plain area. After the turbine expands, the principle is that snacks bought on the plain will expand on the plateau. Since the gas pressure behind the turbine is the actual pressure of the platform, the gas entering the turbine will expand, and vice versa. The boost pressure enables the turbocharged engine to make up for the lack of altitude. The expansion of exhaust gas after entering the turbine is equivalent to the increase of exhaust volume, so the gas pressed into the combustion chamber increases once every cycle. Altitude has little effect on the power of turbocharged engine. After all, the turbocharger is an active turbocharger, and the pressure of the intake manifold can be controlled, which is naturally easy to handle. However, at a very high rotational speed, the displacement is too large and the pressure of the expanding exhaust gas is high. Therefore, in order to prevent the turbine from rotating too fast, the decompression will be started in advance, so the power will be reduced at high speed, but it is much stronger than the naturally aspirated engine! So cars can drive in Tibetan areas. If your car is turbocharged, don't worry about the influence of altitude on power. This is absolutely enough, because the turbocharged engine is in a plateau state, so the fuel consumption can be reduced appropriately. Because turbocharged engines are more excited on the plateau; But if your car is a naturally aspirated engine, the power will be affected more or less, but as long as the altitude is not too high, the problem is not big, and the power will definitely decline. But now almost all cars have extra power, so it is no problem to reduce them appropriately!