Diesel Particulate Filters

Existing diesel particulate filters for heavy-duty diesel engines have relatively low soot oxidation rates, which have prevented them from being used as for emission reduction in many applications.

CCT (Catalytic Combustion Technology) developed by STT Emtec uses diesel fuel from the vehicle injected into the exhaust stream causing an exothermic reaction in the catalyst upstream of the filter. The released heat increases the temperature of the particulate filter, promoting the oxidation of soot collected in the filter media.

Using this emission system makes it possible to retrofit vehicles already equipped with passive particulate filters as well as new vehicles previously not suitable for use with passive particulate filters.
The system is suitable for all types of heavy-duty applications where passive filters have failed to work due to a difficult duty cycle about, among others, low exhaust gas temperature.
The CCT system guarantees that the filter is regenerated as often as needed.

CCT System Features

This CCT system ensures the required soot oxidation rate for reliable filter regeneration during normal operational conditions for every application.
The main features of the CCT system are Transient control of injection parameters: mass flow, timing, and injection rate.
Exceptional exhaust/fuel mixture achieved through fine atomization and fuel distribution

The system contains a fuel delivery system, injection manifold and dosing nozzle, controlled by a stand-alone electronic control unit. The amount of fuel needed for every operational condition is determined by the exhaust gas flow rate and temperature increase needed.