Today for our iMoformation session we will be looking at Variable Geometry Turbochargers. This is one of the many configurations used to boost the performance and efficiency of cars, it is a system that has been made popular by Porsche with their 911 turbo. Variable Geometry Turbochargers allow the engine to utilize exhaust gas effectively at both low and high RPMs by changing the A/R ratio. The A/R ratio is the ratio of the exhaust inlet to the radius of the turbo. On a Variable Geometry Turbocharger system, this ratio can be changed by utilizing Vanes which move on a pivot and is affected by the amount of air flow into the turbo. For a clearer understanding of how the system works, see the very descriptive video below hosted by Jason Fenske of Engineering Explained.
News Source: Engineering Explained
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