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Equivalent Consumption Minimization Strategy for a Power Split Supercharger
Technical Paper
2019-01-1207
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Low voltage hybridization (<60 V) supports engine start/stop, regenerative braking, and constrained torque assist/regeneration at a low cost. This work studies the potential benefits of a novel hybrid system, called a power split supercharger (PSS). A 9 kW motor is shared between boosting the engine or providing hybrid functionalities, allowing it to couple with a small engine and still support good acceleration. However, the PSS operation is limited to only one of the parallel hybrid or boosting modes at each time instance. In this work an equivalent consumption minimization strategy (ECMS) is developed to select the PSS mode and the motor torque during hybrid mode. The PSS operation is simulated over standard EPA drive cycles with an engine mean value model that captures detailed air path and PSS dynamics. The results show that on the combined cycle the PSS improves the vehicle fuel economy by around 20% compared to a vehicle with a turbocharged engine, which is more than 90% of the fuel economy improvement previously predicted through a dynamic programming global fuel economy optimization.
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Authors
Citation
Nazari, S., Middleton, R., Siegel, J., and Stefanopoulou, A., "Equivalent Consumption Minimization Strategy for a Power Split Supercharger," SAE Technical Paper 2019-01-1207, 2019, https://doi.org/10.4271/2019-01-1207.Data Sets - Support Documents
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