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Exhaust gas turbocharger
The turbocharger is driven by engine exhaust energy, referred to as exhaust turbocharging (referred to as turbocharging), as shown in the exhaust turbocharging system. Exhaust gas turbocharging is characterized by no mechanical connection between the turbocharger and the engine. They are connected by gas. Because the compressor consumes a fraction of the energy recovered by the turbine from the exhaust, the turbocharged engine not only increases the power of the engine, but also increases its thermal efficiency and fuel consumption. If you see the Turbo or T logo at the rear of the car, it means that the engine used in the car is turbocharged. The turbocharger is actually an air compressor. It uses the inertia of the exhaust gas from the engine to push the turbine. The turbine drives the coaxial impeller to compress the air sent by the air cleaner pipe to pressurize the air and enter the cylinder. When the engine speed is increased, the exhaust gas discharge speed and the turbine speed are also increased simultaneously, the impeller compresses more air into the cylinder, and the pressure and density of the air increase to burn more fuel, correspondingly increase the amount of oil and adjust the engine speed. It is possible to increase the output power of the engine.
1. Turbocharger operation check
When the engine is in operation, check according to engine idle speed and medium speed and change engine speed, so that the supercharger should run evenly, without metal impact or metal friction, no surge or abnormal vibration.
2. Turbocharger external inspection
Always check the supercharger's condition. The exhaust and the ducts are leaking the oil pipe and joints. For example, the Caterpillar electronically controlled diesel engine 3512B is equipped with a water-cooled supercharger. Check the cooling water pipe and the joint seal for leaks. Leakage and timely maintenance.
3. Turbocharger turbine and air compressor check
Check that the turbine and air compressor wheel should be completely clean, and there is carbon deposit on the back of the turbine blade, which is carbon deposit caused by oil coking or oil burning. There is dust on the back of the air compressor wheel, which is a leak in the intake pipe. Care should be taken not to collide and damage the impeller during the disassembly.
4. Turbocharger seal ring inspection
Always check that the seal ring is sealed. Poor sealing can cause oil to enter the intake pipe and the cylinder to burn. Causes engine oil to burn out.