The state of Aftertreatment

A combination of better technology and better monitoring has allowed engine makers to extend DPF cleaning intervals. Either a predetermined distance or hours, combined with fuel consumption, are reliable predictors of how heavy the engine is working, and how likely the DPF is to need cleaning

In the last 15 years, manufacturers have learned a lot, and with the addition of the SCR in 2010 they have been able to tune the engine to where it allows them to reduce ash accumulation, produce more torque at lower engine RPM, which reduces the amount of fuel they burn, and that is producing higher exhaust temperatures and steadier flow. All of which lead to more effective regenerations. More effective regens mean longer intervals between cleanouts.

Despite these advancements, certain challenges persist for vocational trucks. Fleets with lighter loads, and those operating in frequent stop-and-go conditions, will still require more frequent regenerations. Neglecting this need will always lead to a derated truck. As a diesel tech, taking a proactive approach to aftertreatment maintenance can help minimize fleet downtime. Implementing a regen routine alongside a robust preventive maintenance program can prevent major repairs resulting from neglecting the regeneration process.