6.4L Power Stroke Emissions

6.4L Emissions Equipment Overview

The 6.4 liter Power Stroke features advanced emissions controls, never before seen on a Power Stroke engine. Working together, the new emissions systems on Power Stroke equipped trucks help keep the 6.4L emissions well within the EPA's strict requirements. The emissions system features 3 main components:

Diesel Particulate Filter:

The diesel particulate filter, or DPF, is responsible for eliminating particulate matter from the exhaust system, specifically the soot that is emitted by diesel engines. Diesel particulate filters are effective in removing 85 - 100 % of the soot emitted by diesel engines, thus the reason why the 6.4 L Power Stroke will not show visible signs of soot in the exhaust system.

Exhaust After Treatment:

The exhaust after treatment used on the 6.4 L Power Stroke cleans the diesel particulate filter. As you can imagine, a clogged DPF would lead to poor performance, efficiency, & fuel economy. To prevent the DPF from becoming clogged, the 6.4 L uses a process known as Active Regeneration. During active regeneration, the engines computer raises exhaust gas temperatures & injects fuel into the exhaust system to burn off the soot that has been collected in the DPF. Without active regeneration, the DPF would become clogged & need replacement. In order to keep the diesel particulate filter clean, active regeneration can occur several times per day.

Exhaust Gas Recirculation:

An exhaust gas recirculation (EGR) system directs a portion of exhaust gases back into the engine. The EGR system helps to drastically reduce the amount of nitrogen oxides that the 6.4 L emits. Nitrogen oxides are primarily formed when nitrogen & oxygen are subjected to high temperatures. Recirculating a portion of the exhaust gas helps to reduce the amount of excess oxygen being forced into the engine. EGR systems also reduce the peak combustion temperature, further reducing the amount of nitrous oxides produced during combustion.