Turbocharger operation
The exhaust gases, which are still quite hot, are fed to the turbine wheel, causing the wheel to rotate. When the turbine rotates, the gases expand and transmit excess power to the unit shaft, which is spent on compressing the air in the compressor, located on a common shaft with the turbine. The rotation frequency of the turbocharger shaft varies in the range of 20,000-115,000 rpm, which is accompanied by a characteristic "whistle" of the turbine.
Gas bypass valve past the turbine
If the pressure of the air supplied by the compressor exceeds the permissible value (lo engine reliability conditions), the exhaust gases are bypassed by the turbine by a special valve with an independent drive. The drive is a diaphragm driven by the pressure of the supercharged air. In this way, the boost pressure is regulated with feedback.
Warnings
1. Do not turn off the engine immediately after the end of the trip. Let the engine idle for 20-120 seconds to cool the turbine. This will significantly extend the service life of the turbocharger. (If possible, install a turbo timer).
2. Avoid prolonged engine operation at high speeds and sudden acceleration when the engine is not warmed up.
3. If the turbocharger fails prematurely, check:
- Engine oil level and quality.
- Turbocharger operating conditions.
- Turbocharger oil supply lines
4. Take care when removing and installing the turbocharger. Do not carry the unit by the bypass valve drive rod.
5. After removing the turbocharger, close the inlet and outlet pipes and oil holes with plastic plugs.
6. Before installing the turbocharger, flush the oil supply pipe
7. Before installation, clean the mating surfaces of the turbocharger and oil pipes.
8. When replacing fasteners, install only original products.
9. After installing the compressor, pour 20 cm³ of engine oil into the bearing housing and turn the compressor shaft by hand.
[The article is taken from a web resource: www.ToyotaMAN.ru]
10. After replacing the compressor, crank the engine with the starter for 20-30 seconds (without starting the engine) to fill the lubrication system or run the engine at idle speed for at least one minute.
11. Do not operate the engine with the air filter removed. Otherwise, the compressor wheel will fail very quickly.
