TECT’s complete retrofit kit is comprised of the following:
- diesel oxidation catalyst (DOC)/thermal stabilizer
- diesel particulate converter (DPC)
- low-pressure exhaust gas recirculation (LEGR) system
- controller/micropocessor with an on-board diagnostic system (OBD)
The DOC/thermal stabilizer enhances the exhaust gas temperature profiles, assists with the incineration process, as well as the NO2 conversion. The diesel particulate converter houses the composite wire-mesh media, assembled in the form of candles.
The forgoing particulate control system can effectively support low-pressure EGR function. The LEGR system is used to reduce NOx. The EGR strategy is a mature and well-founded technique for reducing NOx by 50%.
The retrofit kit’s microprocessor is used to provide control of all the system’s components. The primary functions are: control of electric incineration, control of EGR function, communication with the engine microprocessor, and to provide an On-Board Diagnostics (OBD) signal should malfunction be detected in the system. The OBD signal(s) alerts the driver to take action to remedy or repair any malfunction.
TECT’s retrofit kit is designed to operate on Caterpillar 3126 model engines, model years 1998-2003. TECT plans to expand the eligibility of retrofitted engines to cover dominant classes of on-highway engines.