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Verified Retrofit Technologies from Engelhard
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| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | CO | NOx | HC | |||
| DPX Catalyzed Particulate Filter | Highway, heavy-duty, 4 cycle, model year 1994 - 2002, turbocharged or naturally aspirated diesel engines | 30 | 60 | 60 | n/a | 60 |
† - Baseline assumes an unmodified engine running on regular 2D (<500 ppm sulfur) fuel.
The following operating criteria are required to be met when retrofitting highway engines with the DPX:
- The engine exhaust temperature must be at least 250° C for 30 percent of the duty cycle. (As there may be significant variations from application to application, Engelhard 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 should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer
- Engelhard installs a backpressure monitor and malfunction indicator light on all vehicles equipped with a DPX filter. In some cases Engelhard, in conjunction with the engine manufacturer, will connect the backpressure monitor to the electronic control module (ECM) which will record a trouble code if backpressure increases.
- The engine must be operated with a fuel that contains a sulfur content of no more than 30 ppm max.
A 1-3% fuel economy penalty may be realized when used in a compatible application.