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National Clean Diesel Campaign (NCDC)

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Formerly Verified Technologies List

Formerly Verified Retrofit Technologies
Manufacturer Technology Applicability Reductions (%)
PM NOx HC CO
Engine Control Systems Limited AZ Purimuffler or
AZ Purifier
Diesel Oxidation Catalyst (DOC)
with ECS Closed Crankcase Ventilation (CCV) system with Low Sulfur Diesel Fuel (LSD)
Highway, heavy heavy-duty, 4-cycle, mechanically or electronically injected, turbocharged or naturally aspirated, originally manufactured from 1991 through 2004 model years which meet a 5 or 4 g/bhp-hr NOx standard with open crankcase ventilation and no after treatment engines 40 n/a 75 60
Engine Control Systems Limited AZ Purimuffler
Diesel Oxidation Catalyst (DOC)
with Low Sulfur Diesel Fuel (LSD)
Highway, medium heavy-duty, 4-cycle, model years 1991 - 2003 Cummins and Navistar/International engines originally manufactured with no after treatment, turbocharged or naturally aspirated, non-EGR engines 40 n/a 70 40
Engine Control Systems Limited AZ Purimuffler or
AZ Purifier
Diesel Oxidation Catalyst (DOC)
with Low Sulfur Diesel Fuel (LSD)
Highway, heavy heavy-duty, 4-cycle, model years 1991 - 1993 Cummins engines originally manufactured without exhaust after treatment, turbocharged or naturally aspirated, non-EGR engines 35 n/a 70 40
Engine Control Systems Limited AZ Purimuffler
AZ Purifier
Highway, heavy duty, 2-cycle engines 20 n/a 50 40
Engine Control Systems Limited AZ Purimuffler
AZ Purifier
Highway, heavy duty, 4-cycle engines 20 n/a 50 40
Lubrizol PuriNOx
Water emulsion fuel
Highway & Nonroad, heavy-duty, 2 & 4-cycle 16 to 58 9 to 20 -30 to -120 -35 to 33

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Formerly Conditionally Verified Retrofit Technologies that Did Not Fulfill Necessary Conditions for Verification
Manufacturer Technology Applicability Reductions (%)
PM NOx HC CO
Engine Control Systems Limited AZM Purimuffler or AZM Purifier Diesel Oxidation Catalyst (DOC)
Highway, heavy-duty, 4 cycle engines 1991 through 2006 20 n/a 50 40
Engine Control Systems Limited AZM Purimuffler or AZM Purifier Diesel Oxidation Catalyst (DOC) with ECS Closed Crankcase Ventilation (CCV) System
Highway, heavy-duty, 4-cycle, mechanically or electronically injected, turbocharged or naturally aspirated, originally manufactured from 1991 through 2006 model years which meet a 5 or 4 g/bhp-hr NOx standard. 25 n/a 50 40
Engine Control Systems Limited Purifilter Plus (Diesel particulate filter on the engine, electrical panel for active regeneration at the garage/maintenance yard)
Original verification letter (PDF) (3 pp; 500K, March 25, 2009, About PDF)
Verification removal letter (PDF) (1 pg; 300K, May 26, 2010, About PDF)
Highway; heavy, medium, and light heavy-duty; Urban Bus; 4-cycle; model years 1994 - 2006; turbocharged or naturally aspirated; EGR engines 90 n/a 85 75

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Formerly Verified Retrofit Technologies that Do Not Comply with the 2009 NO2 Limits
Manufacturer Technology Applicability Reductions (%)
PM NOx HC CO
Caterpillar, Inc. Catalyzed Converter/Muffler (CCM) Highway, heavy-heavy and medium-heavy duty, 4 cycle, non-EGR, model year 1998 - 2003, turbocharged or naturally aspirated engines 20 n/a 40 20
Clean Diesel Technologies, Inc. Platinum Plus Purifier System
(fuel borne catalyst plus DOC)
Highway, medium heavy- and heavy heavy-duty, 4 cycle, model year 1988 - 2003, turbocharged or naturally aspirated engines 25 to 50 0 to 5 40 to 50 16 to 50
Clean Diesel Technologies, Inc. Platinum Plus Fuel Borne Catalyst/Catalyzed Wire Mesh Filter (FBC/CWMF) System Highway, medium heavy-duty, 4 cycle, model year 1991 - 2003, non-EGR, turbocharged or naturally aspirated engines 55 to 76 0 to 9 75 to 89 50 to 66
Engelhard DPX Catalyzed Diesel Particulate Filter Highway, heavy-duty, 4 cycle, model year 1994 - 2002, turbocharged or naturally aspirated engines 60 n/a 60 60
Engelhard CMX Catalyst Muffler Highway, heavy-duty, 2 cycle engines 20 n/a 50 40
Johnson Matthey Partial Continuously Regenerating Technology2 (PCRT2) Particulate Filter Highway, heavy-heavy and medium-heavy duty, 4 cycle, non-EGR, model year 1988 - 2003, turbocharged or naturally aspirated non-urban bus engines 50
(MY1988-1993)
45
(MY1994-2003)
n/a 92 68
Johnson Matthey Catalyzed Continuously Regenerating Technology (CCRT) Particulate Filter Highway, heavy-duty, urban bus, 4 cycle, non-EGR model year 1994 - 2006, turbocharged or naturally aspirated engines. 90 n/a 95 85
Johnson Matthey Continuously Regenerating Technology (CRT) Particulate Filter Highway, heavy-duty, 4 cycle, model year 1994 - 2006, turbocharged or naturally aspirated engines 90 n/a 95 85
Johnson Matthey CEM Catalyst Muffler Highway, heavy-duty, 2 cycle engines 20 n/a 50 40
Paceco Corporation MES diesel particulate filter (MES-DPF) Pre-1996 nonroad, 4-cycle, heavy-duty diesel engines in the 225 - 450 kW (NR7) power range in electrical generation applications 39 n/a 95 90
PUREM PMF Green-Tec Particulate Filter/Catalyst Highway, medium-heavy duty up to 280 hp, 4 cycle, non-EGR, model year 1998 - 2003, turbocharged or naturally aspirated engines 90 n/a 90 85
PUREM PMF Green-Tec 230 Particulate Filter/Catalyst Highway, medium-heavy duty up to 230 hp, 4 cycle, non-EGR, model year 1998 - 2003, turbocharged or naturally aspirated engines 90 n/a 95 80

Note: For after-treatment devices the reductions are based on the installation of the retrofit technology on engines that were originally produced without diesel oxidation catalysts or diesel particulate filters.

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