Evaporative Emission Control System (EVAP) & Carbon Canister Modeling Simulation

GT-SUITE offers a complete and flexible solution for electrified vehicle design

EVAP & Carbon Canister Modeling OPTIMIZE HYDROCARBON CAPTURE

GT-SUITE simulation software includes advanced solvers and components for modeling the entire Evaporative Emission Control System (EVAP), including the flow network, carbon canister, and canister purge valve (CPV).  An activated carbon canister is used to capture hydrocarbon vapor emissions from the fuel tank as part of an EVAP system.  The user has full control over defining the heterogeneous reaction mechanism for modeling the hydrocarbon adsorption and desorption in the carbon canister.  There is increasing interest in optimizing the carbon canister size for hydrocarbon storage, and optimizing the CPV control strategy, especially for turbocharged gasoline direct injection (GDI) engines and hybrid electric vehicles (HEV/PHEV).

GT-SUITE allows you to evaluate how a purge event affects engine performance and emissions. You can also choose when and where to purge during a drive cycle, for example, in an intake manifold under vacuum conditions or upstream of the compressor during boosted conditions. EVAP system components can be modeled in isolation or together with vehicle, engine, thermal management, and control systems, making this tool uniquely suitable for system level optimization and collaborative engineering.

EVAP & Carbon Canister ModelingAPPLICATION HIGHLIGHTS

  • Automated building of 1D flow network from CAD with GEM3D
  • Advanced Navier-Stokes solver for accurate gas dynamics
  • Advanced carbon canister modeling features
  • Axial species diffusion using the implicit flow solver (fuel vapor diffusing from tank to canister)
  • Various levels of fidelity for CPV modeling
  • Real Time Capable run times
Reference: "EVAP System Fluid-Dynamics and Chemistry Modelling for EMS Purge Control Development and Optimization," Les Smith and Ali Hussain Jaguar Land Rover, Enrico Pautasso, Emanuele Servetto and Eduardo Graziano Powertech Engineering S.r.l., Jon Brown Gamma Technologies, Inc., 2015 SIA Powertrain Conference
Reference: "EVAP System Fluid-Dynamics and Chemistry Modelling for EMS Purge Control Development and Optimization," Les Smith and Ali Hussain Jaguar Land Rover, Enrico Pautasso, Emanuele Servetto and Eduardo Graziano Powertech Engineering S.r.l., Jon Brown Gamma Technologies, Inc., 2015 SIA Powertrain Conference

Advanced Features

  • Detailed fuel tank model including fuel evaporation

  • Diurnal test cycle, modeling the flow and diffusion of fuel vapor from the fuel tank to the carbon canister during low/zero flow conditions
  • Carbon canister fuel vapor loading and purging
  • Canister Purge Valve (CPV) design and optimization, duty cycle analysis
  • Canister vent (check) valve modeling
  • Air Induction System Hydrocarbon Trap (AIS HC Trap) modeling

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Learn more about EVAP & Carbon Canister Modeling RELATED GT APPLICATIONS

Ready to learn more about GT’s simulation capabilities?

Reach out to us with questions about our technology or to discuss your current simulation needs.