State-of-the-art SCR technology

Here’s how it works.

• The engine’s stainless-steel exhaust system routes to a diesel particulate filter (DPF) and SCR system unit
• Diesel exhaust fluid (DEF) is injected into the exhaust stream between the filter and the SCR catalyst
• The heat of the exhaust turns the fluid into ammonia gas, water vapor and carbon dioxide
• Inside the catalyst, ammonia gas transforms the exhaust’s oxides of nitrogen (NOx) into harmless nitrogen gas

Together with an enhanced exhaust gas recirculation (EGR) system and variable-geometry turbocharger, SCR technology allows all Isuzu N-Series trucks to meet the demanding emissions standards.

This revised exhaust system also monitors the DPF’s particulate status and the level of DEF required for the SCR system to operate, and reports the results to the driver through the Multi-Information Display.

Under normal highway operating conditions, the DPF will regenerate itself automatically to remove particulate matter from the exhaust. But under slow-speed, stop-and-go or long-idle conditions, the system may require—and will allow—the driver to manually initiate a DPF regeneration cycle manually.