I've been wondering how much current turbocharging techniques, especially variable turbine geometries and electronic boost pressure controls, affect the fuel consumption of smaller engines. Are the efficiency gains from higher RPMs and better air mass control actually realized, or do new losses occur due to additional components? What experiences or theoretical assessments do you have on this topic? How would you weigh the pros and cons?
How do modern turbocharging techniques affect fuel consumption in small engines?
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Thanks for the interesting question – variable turbine geometry and electronic boost pressure controls can improve air mass control in small engines and reduce fuel consumption at partial load, though additional components can introduce losses at low rpm. Have you already got concrete measured values from a 1.0-litre engine with VGT to check the net effect?