This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Variable Displacement Supercharger Performance Evaluation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
Annotation ability available
The Variable Displacement Supercharger (VDS) is a twin helical screw style compressor that has a feature to change its displacement and its compression ratio actively during vehicle operation. This device can reduce the parasitic losses associated with supercharging and improve the relative fuel economy of a supercharged engine.
Supercharging is a boosting choice with several advantages over turbocharging. There is fast pressure delivery to the engine intake manifold for fast engine torque response providing the fun to drive feel. The performance delivered by a supercharger can enable engine fuel economy actions to include engine downsizing and downspeeding. The cost and difficulty of engineering hot exhaust components is eliminated when using only an air side compressor. Faster catalyst warm up can be achieved when not warming the turbine housing of a turbocharger.
To quantify these effects, a 2.0L Ford Eco-Boost® engine was chosen for an analytical comparison of three boosting configurations: turbocharged, roots style supercharged, and twin screw compressor supercharged with variable displacement. A number of partial load points were chosen to compare cycle averaged fuel consumption of the boost systems with weighting factors that represent a large SUV. Engine dynamometer testing validated the simulation results.
CitationWade, R., Murphy, S., Cross, P., and Hansen, C., "A Variable Displacement Supercharger Performance Evaluation," SAE Technical Paper 2017-01-0640, 2017, https://doi.org/10.4271/2017-01-0640.
- SAE J1723 Supercharger Testing Standard.
- Dipl.-Ing. Michael Fitzen, Dipl.-Ing. Wolfgang Hatz,Dipl.-Ing. Axel Eiser, Dr.-Ing. Thomas Heiduk, Dipl.-Ing. Jörg Riegner AUDI AG, Ingolstadt, Germany The Audi 3.0l TFSI – the new top-of-the-range V6 engine, Internationales Wiener Motorensymposium 2008
- Birckett, A., Engineer, N., Arlauskas, P., Shirley, M. , “Mechanically Supercharged 2.4L GDI Engine for Improved Fuel Economy and Low Speed Torque Improvement,” SAE Technical Paper 2014-01-1186, 2014, doi:10.4271/2014-01-1186.
- Ostrowski, G., Neely, G., Chadwell, C., Mehta, D. , “Downspeeding and Supercharging a Diesel Passenger Car for Increased Fuel Economy,” SAE Technical Paper 2012-01-0704, 2012, doi:10.4271/2012-01-0704.