Page 33 - ESP (CNG) Participant Guide
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Module 3: Low-Pressure CNG Fuel System Components

             Light-Duty            Bi-fuel– same components as
             Emissions Controls     gasoline
                                      o  EGR
                                      o  Catalytic converter
                                      o  EVAP system

                                    Dedicated NGV
                                      o  EGR on most
                                      o  Catalytic converter
                                      o  No EVAP system












             Heavy-Duty
             Emissions Controls
















                                    Simplified emission controls
                                      o  Three-Way Catalyst (TWC) and Exhaust Gas Recirculation (EGR) only
                                             No DEF
                                             No DPF
                                             No SCR

















                                    NGV Essentials and Safety Practices (CNG)                              © 2023 NGVi All Rights Reserved   Page 3-5
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