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The number of new passenger car models equipped with turbochargers is constantly growing. These components are increasingly found in the equipment of gasoline engines and almost all diesel engines. As a result, they can be more compact, efficient and environmentally friendly while maintaining high technical characteristics, and repair of turbines Kyiv it turns out quite budgetary.
Delphi's aftermarket turbocharger offering is a product with a wide range of applications in European and Asian vehicles and includes both wastegate and variable geometry designs. Each of these products undergoes thorough testing in the field of dynamic balancing of the rotor and calibration of the pressure control system. It also has a standard 24-month unlimited mileage warranty and an assembly kit included in the delivery. Thanks to its reliability and durability, the turbocharger provides its manufacturers with a high degree of competitiveness on the market.
Before approval, each element passes up to 30 different quality tests, the main of which are:
A. comprehensive assessment of the entire assembly,
B. installation and calibration of the control mechanism,
C. compatibility of selected components with specifications,
D. dynamic balancing of the rotary assembly,
E. Elasticity of the oil circuit,
F. completeness of the equipment with all fasteners and gaskets,
G. turbine blades are made of an alloy with a high nickel content.
Turbo systems
The very principle of turbocharging, that is, compression of the intake air with the help of engine energy, is based on the so-called positive clutch process: the more it burns in the fuel cylinders, the faster the turbine rotates, and with it the compressor, increasing the amount of air pumped into combustion chambers. However, in modern engines, this dependence requires additional modifications depending on the specific power at different loads and crankshaft rotation speeds. Therefore, the recharge rate should vary to a certain extent.
This effect is achieved by changing the speed of rotation of the turbine with the help of two alternative solutions: valve-controlled direction of the exhaust part directly into the exhaust system through a bypass channel to bypass the turbocharger, controlled by a pneumatic or electric (stepping) actuator, the position of the turbine blades relative to its axis of rotation. A valve is used to discharge excess flue gas from the inlet channel of the turbine when the boost pressure threshold is reached. This ensures constant and high power in a wide range of engine revolutions. In a turbine with variable position geometry, the blades direct the flow of gas in the housing. Thus, the efficiency of the turbocharger is regulated, and the reaction time of the engine is reduced by pressing the accelerator pedal, and the power varies over a wider range of performance characteristics.
General rules for replacing turbochargers
Simply replacing the defective part with a correctly selected new one usually does not allow to completely solve the problem, since the failure of the turbocharger is usually caused by external causes that must be eliminated first, which is what the manufacturer does repair of turbines in Cherkassy according to technical requirements. Otherwise, there is a risk of failure and the possibility of serious damage to the engine, which means high costs for repairs and loss of the manufacturer's reputation in the eyes of customers.
Therefore, it is always necessary to find the root cause that led to the malfunction and take appropriate actions before starting to assemble the spare part. The most common causes of turbocharger failures are: insufficient lubrication (insufficient oil supply), a foreign body in the lubrication or intake system (contamination of oil or intake air).
Most mechanically damaged turbocompressors can also lead to rapid destruction of new components. This is primarily the uncontrolled movement of metal particles detached from the compressor rotor in the oil supply and air intake systems.
