Comparison between Rule-Based and Instantaneous Optimization for a Single-Mode, Power-Split HEV

Paper #:
  • 2011-01-0873

Published:
  • 2011-04-12
Citation:
Kim, N. and Rousseau, A., "Comparison between Rule-Based and Instantaneous Optimization for a Single-Mode, Power-Split HEV," SAE Technical Paper 2011-01-0873, 2011, https://doi.org/10.4271/2011-01-0873.
Pages:
8
Abstract:
Over the past couple of years, numerous Hybrid Electric Vehicle (HEV) powertrain configurations have been introduced into the marketplace. Currently, the dominant architecture is the power-split configuration, notably the input splits from Toyota Motor Sales and Ford Motor Company. This paper compares two vehicle-level control strategies that have been developed to minimize fuel consumption while maintaining acceptable performance and drive quality. The first control is rules based and was developed on the basis of test data from the Toyota Prius as provided by Argonne National Laboratory's (Argonne's) Advanced Powertrain Research Facility. The second control is based on an instantaneous optimization developed to minimize the system losses at every sample time. This paper describes the algorithms of each control and compares vehicle fuel economy (FE) on several drive cycles. Results demonstrate that both algorithms achieve similar FE values, which serve to demonstrate the benefits of the instantaneous optimal control: because it does not require tuning by the engineers, control development time is accelerated.
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