The term “retrofit” is most often used to describe exhaust aftertreatment devices. While exhaust aftertreatment technology represents a very promising category of solutions for in-use emissions reduction, it is only one of a number of options. In addition to cleaner fuel use and idle reduction technologies and practices, here are some other opportunities
- Repair/Rebuild—Regular engine maintenance plays a critical role in ensuring proper engine performance and engine rebuilding can significantly lower emissions in some cases.
- Retrofit—The installation of exhaust aftertreatment technologies - such as particulate filters, oxidation catalysts, exhaust gas recirculation (EGR), selective catalytic reduction (SCR) devices, and NOx catalysts - can reduce emissions of particulate matter (PM) and nitrogen oxides (NOx).
- Repower—Replacing the older engine with a new clean diesel engine can be a cost-effective option for certain highly-valuable pieces of diesel equipment.
- Replace—Replacing entire vehicles or equipment may be the best, most cost-effective option for some of the oldest engines.