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How will turbochargers bring higher power and efficiency in the future?

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How will turbochargers bring higher power and efficiency in the future?

Sources : The site | Release date : 2017-05-04 | View :
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We know that today's turbochargers are no longer the high-speed parts of the 1980s that are easy to break the engine. At least one of every four cars in North America is equipped with turbocharged. They are more efficient and reliable, and lower cost, many of our very favorite engines have made a compromise to the turbo.

According to turbocharged engine manufacturer Bo Tao power estimates that within five years, nearly half of the world's new light vehicles will be equipped with turbocharging technology, more than the current market more than 18 million, which is expected to account for North America Of which 39%.

Take the purpose of supercharged engine nothing less than to improve power, improve fuel economy or both. For turbocharging, the future direction of development may be to ensure energy conservation at the same time, to further improve the dynamic performance, eliminating the current turbocharged engine shortcomings.

Electric turbines and hybrid
Those who do not like the F1 car powered by the turbocharged V6 engine will now be able to open cars with similar technology in a few years. A DC motor mounted on a turbine and compressor connection shaft allows the turbine to rotate at full speed without the use of exhaust gas, and this can be done almost instantaneously, thereby minimizing turbine hysteresis to zero.

Thus, in a conventional turbine engine where the turbine has not been driven at a low speed range, the motor-driven turbine can compensate for the lack of dynamic response of the conventional turbine engine. Although the current part of the high-end models equipped with mechanical turbo double pressurization can also achieve this effect, but its high cost, space and other issues make ordinary vehicles can not popularize such a technical configuration.

Secondly, because it is electric drive through the software can be more accurate and easy to control the boost power. At the same time, the electric turbine will use the energy of excess exhaust gas to re-generate electricity, rather than let it in the turbine when the high load operation around the turbine waste. A super capacitor will be used to store these energies to drive turbines or other electrical parts, like a set of powerable hybrid systems. As a result, the use of electric turbines results in faster power transmission and more efficient fuel economy.

We have seen electric motor boosters on Ford Focus and Audi's diesel prototype, although the principle is slightly different and is not connected to the exhaust pipe. However, without considering the unconfirmed reliability of an electric turbine in a production vehicle, it faces the same biggest problem with electric machinery pressurization: requiring high power support at work as a source of energy, or requiring consumption More energy.

At peak load, the electric turbo requires 48 volts to drive the voltage, but the manufacturers have not shown much interest in redesigning their current 12 volt system. At the same time, due to power and some use of axial flow turbine structure constraints, electric turbine in high load conditions is difficult to achieve the efficiency of traditional turbines.

Therefore, in order to meet the needs of high voltage, the above mentioned F1 racing technology in the turbine generator needs to further improve the production car will be converted into electrical energy efficiency. Alternatively, high-voltage batteries on conventional hybrid models may be used to provide the driving force of the electric turbine. Moreover, it is also a potential problem if the same effect, energy consumption, heat dissipation, life, and weight of the motor system are achieved by power, especially in high load conditions.

Perhaps the low speed range using electric turbines, with high-speed range switch to traditional turbines is a two-way approach, such as Volvo and Audi in this direction in the development. But there are also technically pursuing the ultimate in technology, such as Subaru, using a more radical use of electric turbines in the full speed range of work, completely replace the traditional turbine.

But to say that even if we overcome a variety of technical problems, the need for the use of electric turbines is still in the discussion. This is because, fundamentally speaking, electric turbines require additional power, which is contrary to the purpose of energy saving for traditional turbines that use exhaust gas as a motive force. So in energy saving and performance to find a suitable balance between the people in the future need to explore.

Due to structural constraints, the traditional turbocharger has its inherent shortcomings. And in our design to make up for these deficiencies after the idea, now how to apply these new technologies to the vehicle on the hardware material is also a big test. Such as the above mentioned can withstand ultra-high temperature of the material is the turbine system to achieve higher thermal efficiency of the development of a bottleneck.

Furthermore, as technology evolves and progresses, we believe that technical issues similar to those mentioned above will soon be addressed. However, despite the smaller turbocharged engine in the United States Environmental Protection Agency (EPA) test achieved better results, but compared with the natural inspiration, in many road test small turbo did not reach the claim Fuel consumption level.

Now the test instrument recognized results often in the real road can not be qualified, indicating that the means of testing the current technical effect is not perfect, from the complete real driving environment has a certain distance. So the next step is to solve the need to find a different situation will be appropriate to match the way so that in reality can be fully achieved in the laboratory and test bench to achieve the results, otherwise everything is just on paper.