Mechanical and exhaust gas turbocharger twin supercharged combination, although turbo lag can solve the problem, but because of the technical complexity, high cost, large footprint and other issues, and it is not all models can be used. And we are currently seeing electric turbocharger for Audi released before that Taiwan 3.0L TDI diesel engine, Ford Turbo for example, did not increase too many parts, simple and reliable.
After the exhaust gas turbine cooperate with the work of this twin turbocharging system is as follows. Two booster mode at idle not start, but at low speeds, the exhaust gas turbine engine exhaust because of insufficient, still does not start. The electric turbine at this time powered by a motor, to improve the overall power of the engine. When the high-speed operation, the electric turbo is dormant, began to force the exhaust gas turbine, back to our traditional turbocharged state. Two booster mode switching, the Central cooler bypass valve controls the rear. Therefore, the electric turbocharger greatest significance is to improve the general exhaust turbine of turbo lag imagination.
Type Electric turbocharged
Currently on the market to buy an electric turbocharger is mainly divided into two types, one is the wind direction and axial flow impeller shaft in the same direction, and the two wind and centrifugal impeller shaft perpendicular to the direction. Axial very easy to understand, fans we use at home fall into this category fan. Universal Turbo The principle of the centrifugal fan and exhaust gas turbocharger impeller inside the same.
The biggest difference between the two motor-driven turbocharger is: Centrifugal operating power is increased with increasing air flow, the axial flow of air increases the amount of operating power decreased. Before, electric turbines are generally axial flow, which forms the biggest problem is that when the vehicle is running at high speed, axial-operation with the increasing amount of wind power is reduced. Simply put, the car at high speed, the air intake air has decreased. Making the trip upstream vacuum entire gas supply system, so that the pressure is reduced. In this case the electric turbo upgrade can not only play the role of power, it will make the intake is not smooth. This is why when we all converted before electric turbine, there will be a high-speed but boring feelings.
Therefore, the current electric turbocharger, a centrifugal ultimate effect will be significantly useful axial type. Of course, the centrifugal higher the cost will be.
Comments: electric turbocharger has made great progress, there is news that a whole new generation Audi Q7 will be equipped with an engine equipped with an electric turbine. The current online by selling modified electric turbocharger, due to the uneven quality in the choice of the time also need to be more cautious. Otherwise, not only can not make power upgrade, but may affect the normal operation of the engine.
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