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Torque Control of a Small Gasoline Engine with a Variable Nozzle Turbine Turbocharger
Published November 3, 2009 by Society of Automotive Engineers of Japan in Japan
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The ideal torque curve of automotive engines should be high and flat from low engine speed. To achieve this, we installed a variable nozzle turbine (VNT) turbocharger to a retail natural aspirated (NA) small gasoline engine. In the VNT turbocharger, variable vanes are set around the turbine wheel and form nozzles that changed the flow velocity of the exhaust gas. The vane position was controlled to adjust intake pressure at a target. As a result, the maximum torque improved by 27% and the engine speed at maximum torque was lowered by 1550rpm. A flat torque curve was achieved from 5450rpm to 8000rpm.
CitationShimizu, K., Sato, W., Enomoto, H., and Yashiro, M., "Torque Control of a Small Gasoline Engine with a Variable Nozzle Turbine Turbocharger," SAE Technical Paper 2009-32-0169, 2009.
- Attard W., Watson H. C. and Konidaris S., “Highly Turbocharging a Flow Restricted Two Cylinder Small Engine - Turbocharger Development”, SAE paper 2007-01-1562, 2007.
- Moscetti J., Smith B. G. and Sick V., “Design and Development of a Turbo-Charged E85 Engine for Formula SAE Racing”, SAE paper 2008-01-1774, 2008.
- Enomoto H., Motoi H., Takahashi K., Saito K. and Yashiro M., “The Package of the Turbocharged Engine for the FSAE Vehicle with the Custom Lubricant System”, SAE paper 2007-32-0118, 2007.
- McKee R. H., McCullough G., Cunningham G., Taylor J. O. and McDowell N., “Experimental Optimization of Manifold and Camshaft Geometries for a Restricted 600cc Four-Cylinder Four-Stroke Engine”, SAE paper 2006-32-0070, 2006002E