The California Air Resources Board (CARB) extended its verification of the Huss FS-MK diesel particulate filter to include 2009 and older off-road diesel engines and 2006 and older on-road diesel engines, including select engines having internal exhaust gas recirculation (EGR). Currently, it is the only Verified Diesel Emission Control Strategy for working with any kind of EGR.
The Huss MK system, approved for use on Volvo engines utilizing V-ACT technology with internal exhaust gas recirculation, meets California's CARB Level 3+ requirements. Volvo equipment owners can use the system to help comply with the "In-Use Off-Road Diesel Vehicle Regulation," or to provide the best available control technology (BACT) for the newest machines in owners' fleets. Before CARB's extension of the HUSS verification, engines using any type of EGR had been excluded from applying exhaust retrofit technology in California.
See our Running Green section for more diesel emissions reduction resources