Abstract: Virtual Driveability & NVH Development of HEV Impulse Start from Concept to SOP

Virtual Driveability & NVH Development of HEV Impulse Start from Concept to SOP

Dr Stephen Jones, Principal Product Manager Systems, AVL List GmbH

  • HEV impulse start challenging re time allowed & driveability
  • New simulation enables early specification of HW system
  • Model based control of AT, e-Motor, separation clutch & ICE
  • Virtually quantify & optimize impulse start driveability

(P)HEV impulse start refers to the process whereby a carefully orchestrated sequence of controlled actions smoothly and quickly starts the stationary ICE from pure electric driving, with the high voltage e-Machine via a separation clutch. It is extremely challenging with regard to the short time duration allowed and the driveability demanded (i.e. good comfort and performance response), especially at high vehicle speeds or propulsion power levels. The extended simulation toolchain employed enables reliable and early specification of the right mechanical/electrical/hydraulic hardware system. The simulation toolchain being subsequently used to virtually develop sophisticated and coordinated model based control strategies, including application calibrations, for the automated transmission, e-Machine, separation clutch, and the ICE itself. Crucially the toolchain allows the first time the virtual quantification and optimization of impulse start driveability.

About:

Dr Stephen JonesDr Stephen Jones
Principal Product Manager Systems
AVL List GmbH

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