Page 23 - WM E-Learning Handbook

Content Notes Content

Cummins Natural Gas Engines  Exhaust gas recirculation –
Emissions Control System EGR

 Three-way catalyst - TWC
 Not required for NGVs

 DEF – diesel exhaust fluid
 DPF – diesel particulate

filter
 SCR – selective catalyst

reduction
 Regeneration procedure

Gas Detection System on Vehicle  Alert drivers if there is

natural gas leaking into the

truck

 Sensor display
 Zone 1 – Cab Sensor
 Zone 2 – Engine Sensor

 Two levels of detection
 Trace – 20% of LFL (1%

gas mixed with air)
 Significant – 50% of LFL

(2.5% gas mixed with air)

Technician Safety and Awareness Training for NGVs © 2018 NGVi All Rights Reserved Page 21