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Verified Retrofit Technologies from Johnson Matthey
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| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | CO | NOx | HC | |||
| Catalyzed Continuously Regenerating Technology (CCRT) | Highway, heavy-heavy, medium-heavy, light-heavy duty, urban bus, 4-cycle, non-EGR model year 1994 - 2006, turbocharged or naturally aspirated engines. | 15 | 90 | 85 | n/a | 95 |
† - Baseline assumes an unmodified engine running on 15 ppm sulfur fuel.
Note: The reductions are based on the installation of retrofits to engines that were originally produced without diesel oxidation catalysts or diesel particulate filters.
The following operating criteria must be met in order for appropriately retrofitted engines to achieve the above emissions reductions:
- The engine exhaust temperature must be at least 200° C for approximately 40 percent of the duty cycle. (As there may be significant variations from application to application, Johnson Matthey will review actual vehicle operating conditions and perform temperature data-logging prior to retrofitting an engine with their CCRT filter system to ensure compatibility.)
- The engine’s exhaust must produce a NOx/PM ratio of at least 8, with an optimum approaching 20. Johnson Matthey will make an assessment of the suitability of candidate engines, based upon the applicable emission standards or emission test data.
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer;
- Johnson Matthey must install a backpressure monitor and high pressure indicator light on all vehicles equipped with a CCRT.
- The engine must be operated with a fuel that contains a sulfur content of no more than 30 ppm.
Johnson Matthey has indicated that there is a negligible (approximately 1%) fuel economy penalty with the use of this product.
| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | CO | NOx | HC | |||
| Continuously Regenerating Technology (CRT) | All 4 cycle, model year 1994 - 2006, turbocharged or naturally aspirated engines | 15 | 90 | 85 | n/a | 95 |
† - Baseline assumes an unmodified engine running on 15 ppm sulfur fuel.
Note: This verification applies to highway engines only.
The reductions are based on the installation of retrofits to engines that were originally produced without diesel oxidation catalysts or diesel particulate filters.
The following operating criteria are required to be met when retrofitting highway engines with the CRT:
- The engine exhaust temperature must be at least 240° C for approximately 40 to 50 percent of the duty cycle. (As there may be significant variations from application to application, Johnson Matthey has indicated that they will review actual vehicle operating conditions and perform temperature data-logging prior to retrofitting a vehicle with their PM filter system to ensure compatibility.)
- The engine’s exhaust must produce a NOx PM ratio of at least 8, with an optimum approaching 20. (Johnson Matthey has indicated they will make an assessment of the suitability of candidate engines, probably based upon the applicable emission standards or emission test data. Based on discussions with Johnson Matthey, it is our understanding that one can generally expect a heavy duty diesel engine in proper operating condition to maintain an acceptable Nox/PM ratio over its operating life.)
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer;
- Johnson Matthey installs a backpressure monitor and high pressure indicator light on all vehicles equipped with a CRT.
- The engine must be operated with a fuel that contains a sulfur content of no more than 30 ppm max.
| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | CO | NOx | HC | |||
| CEM™ Catalytic Exhaust Muffler and/or DCC™ Catalytic Converter | Highway, heavy-heavy, medium-heavy, light-heavy duty, non-urban bus, 4-cycle, non-EGR model year 1991 - 2003, turbocharged or naturally aspirated engines | 500 | 20 | 40 | n/a | 50 |
† - Baseline assumes an unmodified engine running on regular 2D (<500 ppm sulfur) fuel.
Note: This verification applies to highway engines only.
The reductions are based on the installation of retrofits to engines that were originally produced without diesel oxidation catalysts or diesel particulate filters.
The following operating criteria are required to be met when retrofitting highway engines with the CEM™ or DCC™:
- The engine exhaust temperature must achieve at least 150 degrees C during its duty cycle.
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer.
- The engine must be operated with a fuel that contains a sulfur content of no more than 500 ppm.
| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) | |||
|---|---|---|---|---|---|---|
| PM | CO | NOx | HC | |||
| [Partial Continuously Regenerating Technology2 (PCRT2) Particulate Filter]a | [Highway, heavy-heavy and medium-heavy duty, 4 cycle, non-EGR, model year 1988 - 1993, turbocharged or naturally aspirated non-urban bus engines]a | 15 | [50]a | [60]a | n/a | [80]a |
a - This verification is conditional. Full verification will be achieved upon completion of additional testing and other requirements as stipulated in the attachment to the verification letter.
The following operating criteria must be met in order for appropriately retrofitted engines to achieve the aforementioned emissions reductions:
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer.
- The engine must be operated with a fuel that contains a sulfur content of no more than 15 ppm.
- The engine exhaust temperature must be at least 240 degrees C for 40% of the duty cycle at the PCRT2 inlet. As there may be variations from application to application, data-logging and a review of vehicle operating conditions is required prior to retrofitting a vehicle to ensure PCRT2 compatibility.
- Backpressure readings must be taken after initial installation of the PCRT2 System and recorded on the Record of Installation card for warranty purposes. To assess the performance of the technology and to avoid engine damage backpressure readings must be performed every six months. Results must not exceed 75 inches H2O (5.5 inches Hg). An alternative would be to install a backpressure monitoring system with a driver warning light to alert the operator if these specifications are exceeded.
- The engine’s exhaust must produce a NOx/PM ratio of at least 20. Johnson Matthey will make an assessment of the suitability of candidate engines based upon the certification emission levels or emission test data.
- Blending of lube oil with fuel is prohibited with this product.
- Certain oil additives contain elements that can damage the PCRT2 system and must be approved by Johnson Matthey prior to use.