Many people say that turbocharged engines are more delicate, so you should idle for a while before starting and after stopping, is this true?

The principle of turbocharged engines

Before considering this question, it is important to understand what is a turbocharged engine?

A turbocharged engine refers to an engine equipped with a turbocharger. Turbocharger is actually a kind of air compressor, by compressing air to increase the intake, so that it is pressurized into the cylinder, the air pressure and density increase can burn more fuel, the corresponding increase in the amount of fuel and adjust the engine speed, you can increase the output power of the engine.

Turbine life

Since turbocharged engines often use turbines, the turbines also have a certain service life, and the maintenance cost is relatively high, so many people will feel that they must be treated with care during use, otherwise the life of the turbine will be reduced, and there is a saying that after high-speed operation, they need to stop idle to cool down and then turn off.

Physical basis

According to the use environment of the turbocharger, the turbine is often in a state of high speed and high temperature, and the engine oil has the effect of cooling. In the case of engine running, the turbine can be effectively cooled. However, if the engine running suddenly stops, the oil pressure drops rapidly to zero, and oil lubrication will be interrupted. The heat inside the turbocharger can not be taken away by the oil, and the heat will make the oil inside the turbocharger become carbon deposits. Is it necessary?

In fact, the idea that the turbocharged engine needs to idle for a period of time after parking is relatively old, because the turbocharged engine has just emerged at that time, and the technology is not too mature, so the manufacturer also has certain requirements and restrictions on the use of the turbocharger environment, such as some models will also have nameplates on the engine.

However, today's turbine technology has been relatively mature, not only the service life has been increased, but also the requirements for the use of the environment have been reduced, for example, a set of electronic water pump cooling system will be added inside the turbine to cool the turbine, which will not be limited by engine stalling.

Finally, how do you know if your vehicle needs to idle for a period of time after turning off the engine? Just take out the manual and read it.