Architecture Definition and Simulation

To define HEV architecture, extensive use is made of validated modelling & simulation tools

Architecture definition and performance selection

  • The program targets enable to define a range of architectures which can be simulated to validate the optimum solution for performance, cost and fuel consumption/CO2 emissions
  • The process is to define the type of hybrid, the degree of hybridisation, the e-motor and the overall configuration 

Types of Hybrids

  • Micro Hybrid BSG (Belt Starter Generator)
  • Mild Hybrid ISG (Integrated Starter Generator)
  • Strong Hybrids (LD)
         - Single Mode EVTs

         - Split Mode EVTs
         - Single Motor with BSG
         - Single Motor Design
         - Electric all wheel Drive eAWD (Launch Assist)

To support our efforts in HEV architecture definition, extensive use is made of validated modelling & simulation tools

Please click to enlarge

 

Simulation Tools

Simulation is tailored to the problem being addressed

  • Eg WAVE simulation will not be used when existing measured data exists, rather would be used to assess impact of electric supercharger for example

Approach for selecting configurations

  • Simulations will typically start with large components to assess the potential of the different configurations – i.e. not be limited by battery size in the first instance
  • Then apply constraints from packaging, cost, weight and refine selection

Tools

  • V-SIM
    • Matlab/Simulink simulation of vehicle configuration, used to assess fuel consumption and some performance characteristics

    Includes every vehicle type and sub-systems 
              - Light / heavy duty
              - Gasoline / Diesel
              - Conventional / hybrid
  • WAVE 
    1D engine simulation, is used to assess engine dynamic performance

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