Heavy-Duty Diesel Emission Control Strategy Installation and Maintenance
A verified DPF is required for regulatory credit toward In-use regulations for diesel engines operating in California
Every day, on and off-road diesel engines create air pollutants that can adversely affect human health. CARB requires engine manufacturers to meet strict pollution standards for newer engines. However, fleet owners may need to install a verified diesel emission control strategy to clean up emissions from older, dirtier diesel engines. A diesel emission control strategy is a technology that, if maintained properly, reduces harmful air pollution from diesel engine exhaust before it is emitted into the air. The most common technology used is a diesel particulate filter (DPF), also known as a soot filter or DECS, which substitutes for the original factory muffler. CARB evaluates and approves DPFs to meet specific particulate matter or nitrogen oxide emission reductions.
More information on the Verification of Diesel Emission Control Strategies can be found here: Verification Procedure for In-Use Strategies to Control Emissions from Diesel Engines | California Air Resources Board
Maintenance for Engines with DPFs
DECS component swapping and re-designation requirements
What if the DECS fails outside of the warranty period?
Importance of proper maintenance of diesel engines equipped with retrofit devices
DECS that do not meet the 2009 NO2 emission limit cannot be newly installed after January 1, 2009
Use of fuels/additives in engines equipped with DECS
Selecting CARB Verified Diesel Emission Control Strategies
Guidance document for managing ash generated by DECS
New requirements for DECS manufacturers or authorized installers