Analysis of variable mb star c3 turbine technology

The turbocharger is a stunner of a love-hate relationship mb star c3 many played with a friend of "T" has the experience, especially some of the old petrol supercharged model. Natural turbocharger unparalleled high speed power love, hate nothing more than the "turbo lag" effect (for some civilian players feeling particularly). Ever since, the car engineers tried various methods to shorten the time of the "turbo lag", now the already considerable part of the model has been very dynamic linear plot close to the naturally aspirated engine, variable turbine blade technology is a model.
Hybrid turbo turbocharger variable throat, variable turbocharger tongue or the protagonist of this variable vane turbocharger turbine are inseparable from a design rule, it is a disguised form A \ R value Trim value with the speed change effect.
HKS produced the GT2530 turbine hybrid representatives take a small turbine compressor. The compressor A \ R value of 80, the turbine A \ R value of 60, and has a low speed small turbo responsive advantages, high speed rely on large compressor to ensure horsepower advantage. The disadvantage is that if the mix is ​​too extreme, prone to discharge pressure is too large even meltdown leaves. The solution change sensitive wastegate exhaust pipe of large diameter and high strength titanium alloy blades
This technology actually been  BMW GT1 applied early in the diesel engine, named VGT (Variable Geometry Turbocharger). Why only mention the diesel engine it? Because the diesel engine's exhaust temperature is much lower than gasoline (1000 degrees gasoline, diesel 400 degrees), the requirements of the materials is much lower than gasoline, so widely used. The first hands-on is a sports car the nobles Porsche 911 disadvantage can not be arranged on the innate shape than 4.0L displacement greater level of the mid-engine, so must leave no stone unturned anywhere press power, the turbocharger is natural one of the "key point".

 Porsche eventually teamed BorgWarner overcome this problem (famous BorgWarner's KKK but the turbine manufacturers oh), lies in the use of high-temperature aerospace materials as variable vane, which developed the first equipped with variable turbine blade technology petrol engine. Subsequently, the Porsche name  VAS 5054A  VTG (Variable Turbine Geometry).