This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
On-highway, 4-cycle, light-, medium-, and heavy- heavy duty diesel engines; turbo-charged or naturally aspirated, EGR and non-EGR, and originally manufactured from 2002 through 2006 model years
|Retrofit Fuel, Max Sulfur||15 parts per million (ppm)|
|Reduction in particulate matter (PM)||90%|
|Reduction in nitrogen oxide (NOx)||n/a|
|Reduction in hydrocarbons (HC)||n/a|
|Reduction in carbon monoxide (CO)||50%|
Criteria to achieve emission reductions
The following operating criteria must be met in order for appropriately retrofitted engines to achieve the emissions reductions above:
- The engine may or may not have a pre-existing original equipment manufacturer oxidation catalyst.
- The engine must not have a pre-existing diesel particulate filter.
- The engine must be certified at a PM emission level of at most 0.1 grams per brake horsepower-hour (g/bhp-hr).
- The engine must be electronically controlled.
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer.
- Lube oil, or other oil, should not be mixed with the fuel.
- The engine must be operated on diesel fuel with a sulfur content of no more than 15 parts per million by weight.
- For reliable regeneration, the NOx to PM ratio, based on certified emissions levels, should be 20 or higher, and the engine cycle must be at 240° Celsius for 40% of the operation time.
Verification Letter from EPAYou may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Verification Letter (PDF)(2 pp, 135 K, April 30, 2009)