Volvo Trucks North America and Mack Trucks announced Monday, Feb. 9, that both now offer dealer-installed retrofit diesel particulate filters (DPF) to meet strict new California emissions requirements for in-use vehicles. The DPFs are designed to work with non-exhaust gas recirculation (EGR) engines sold from 1996 to 2002.
The companies say the retrofit DPF is integrated into existing exhaust systems and offered in several sizes based upon engine displacement and horsepower. Each retrofit DPF comes with an installation kit, complete with brackets, engineered for the customer’s specific truck model; dealer installation is required. The DPFs come with a five-year/150,000-mile warranty and can be ordered through any Mack or Volvo dealer in the United States and Canada.
The companies say the DPF uses active regeneration to clear accumulated particulate matter (PM) from the unit’s filter element; this involves raising the heat of the DPF by injecting a small amount of diesel fuel, typically after eight to 10 hours of truck operation. The DPF system includes an electronic control unit designed to constantly monitor the filter element to precisely control PM accumulation and regeneration.
The companies say retrofit DPFs using passive and passive/active regeneration technologies are under development for 2002-2006 EGR engines. The retrofit DPF system is manufactured by Palm Springs, Calif.-based Huss, a provider of exhaust aftertreatment for diesel engines.