With the development of science and technology, turbocharged engines that used to appear only in racing cars or high-end cars are now gradually being deployed in family cars. But many people still have a little understanding of turbocharging. If you don't know how to maintain the turbocharged engine, let's take a look at how the turbocharged engine works and how to maintain it today.
What is the working principle of turbocharging?
"Turbo" is a turbocharged engine, and the letter "T" becomes the representative of the turbocharged engine. In the past, due to the high cost of use and technical requirements, it was less used in the family car. Many of the big brand cars are now equipped with turbocharged models, and the new Ford Focus is equipped with the EcoBoost125 turbocharged engine.
The turbocharger uses the inertial force of the exhaust gas generated by the engine to drive the turbine in the turbine chamber. The turbine drives the coaxial impeller. The impeller pressurizes the air sent by the air cleaner pipe to pressurize it into the cylinder, thereby increasing the number of turbochargers. The amount of intake air in the cylinder also increases the amount of fuel. Increased air pressure and density can burn more fuel, increase the amount of fuel and adjust the engine's speed to increase the engine's output. Of course, the shortcomings of pure turbocharging technology are obvious, the power output is delayed, and the low-speed torque is insufficient.
In response to the above problems, the new Ford Focus EcoBoost 125 turbocharged engine adds in-cylinder direct injection to the traditional turbocharged engine technology to achieve low speed and high torque and maintain peak power over a wide range. Thus, when the vehicle is accelerating, power can be supplied immediately. In addition, the dual variable valve timing also allows the cold air intake valve and the hot air intake valve to operate simultaneously, allowing more air to enter the combustion chamber, and more dense pressurization helps to increase the engine torque.
It is precisely because the EcoBoost125 engine integrates turbocharged, in-cylinder direct injection and dual variable valve timing to make the 1.0T engine burst out with a maximum power of 92 kW/6000 rpm and 170 Nm/1500-4500 rpm. Maximum torque, enjoy the power of a 1.8-liter naturally aspirated engine.
Why turbocharged engine maintenance is more important than ordinary engines
The maximum power of a turbocharged engine can be increased by 40% compared to when the turbocharger is not installed, but the fuel consumption is not higher than that of a normal engine. As the turbocharged engine increases the output power, the maximum burst pressure and average temperature generated during the work will be greatly improved, so the maintenance of the turbocharged engine is particularly important!
Turbo Engine Maintenance Cheats
1. It takes a few minutes to warm up when the cold car starts. The role of preheating is to fully lubricate the turbocharger. This is especially important in winter when the lubrication of the oil is completed and the engine is running at high speed.
2. Do not turn off the turbine immediately after high-speed operation of the turbocharged engine. After the engine is working, the heat inside the turbocharger cannot be taken away by the oil. At this time, the high temperature of the turbocharger portion of the turbocharger will pass to the middle, and at the same time, the supercharger rotor will still rotate at high speed under the action of inertia, which will cause the turbine to increase. The bearing and shaft are damaged by "biting" between the runner shaft and the bushing. In addition, if the temperature of the exhaust manifold is high after the engine is suddenly turned off, its heat is absorbed into the turbocharger housing, causing the oil remaining inside the supercharger to become carbon deposits. Therefore, it is preferable to idle for several tens of seconds before the engine is turned off, so that the turbocharger rotor speed is lowered.
3. Choose fully synthetic motor oil. The oil used in turbocharged engines must have good wear resistance and high temperature resistance, establish a lubricating oil film block, and the oil film has high strength and stability, and synthetic motor oil or semi-synthetic motor oil can meet these needs.
4. Always check that the seal ring of the turbocharger is well sealed. If the seal ring is not sealed, the exhaust gas enters the engine lubrication system through the seal ring, dirtying the oil and increasing the crankcase pressure. In addition, the engine oil is also discharged from the exhaust pipe through the seal ring when the engine is running at low speed. The combustion chamber burns, causing excessive consumption of oil to produce "burning oil".