Turbocharged cars have strong power and low fuel consumption, and even small displacement cars with a turbocharger can produce a lot of power. If there are advantages, there must be disadvantages, such as more expensive maintenance, good use of engine oil, and more expensive air filters. The price of a turbocharger is very high, and it seems that the accessories are not large and can be purchased for ten to twenty thousand yuan. So the lifespan of the turbocharger is highly valued by most car owners. Many people do not buy cars with a T because they are afraid that the lifespan of the turbocharger will be short and the maintenance cost will be high. So in order to have a long service life, besides paying attention to maintenance, there are also precautions to be taken when using it. Today, let's talk about the issue of whether a turbo car can immediately shut down after driving at high speed?

A long time ago, the lifespan of turbochargers was not very long. After 100000 kilometers, many cars began to break down. But now it's different, the lifespan of the turbines is relatively long. In addition to the technological improvement of the turbocharger itself, there have been significant improvements in heat dissipation. Many cars have both water and oil cooling, and some even have delayed cooling function. Even if the engine is turned off, the turbine cooling device will continue to work for two to three minutes. Whether or not to immediately turn off the engine after running on the highway depends on whether it needs to idle and let the turbine dissipate some heat. Vehicles with delayed heat dissipation do not require it, they can be turned off directly, and the cooling system will still work for a while after the engine is turned off. It is best for a car without it to idle for two minutes before turning off the engine, which can protect the turbocharger and extend its lifespan. Some car user manuals also clearly state that after driving at high speeds, it is necessary to idle for three minutes before turning off the engine.

Please note that it is only necessary to idle for two to three minutes and turn off the engine after driving at high speed. If it is not driving at high speed, it is not necessary, just turn off the engine directly. Due to the low working intensity of the turbine during low-speed driving, it does not even work, so there is no need to delay the engine shutdown. That is to say, basically only after entering the high-speed service area do you need to wait for a while to turn off the engine. Before entering the service area, you are driving at high speed, and when you reach the service area, you immediately stop. This is true high-speed driving. Besides, it is generally not needed at other times. Because after driving on the highway, getting off the highway will not immediately reach the destination, and there will definitely be some distance to travel. After getting off the highway, the speed cannot be too fast, and the working intensity of the turbocharger will decrease, which will also cool down. Therefore, after reaching the destination, you cannot call it "driving on the highway", and you don't need to wait for two minutes to turn off the engine. You can immediately turn off the engine. When driving in the city, there is no need to wait and the engine can be turned off directly.

Why do turbochargers have such high requirements for heat dissipation? Firstly, because its operating temperature is very high, with one end in the exhaust pipe, the temperature itself is very high. Secondly, its rotational speed is very high, reaching over 100000 revolutions per minute. After the engine is turned off, due to the inertia effect, it will continue to run at high speed for a while, generating a large amount of heat. However, after the engine is turned off, water and oil will not flow, so heat dissipation cannot be achieved. The turbocharger shaft will experience excessive wear due to high temperature and poor lubrication, shortening its lifespan.

From: WONDEE Autoparts

2024-5-21