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Volvo/Huss Retrofits Produce CARB+ Engines

Volvo Construction Equipment entered a strategic partnership with Huss, a Swiss specialist in diesel exhaust aftertreatment, to provide retrofit systems for Volvo construction equipment that allow them to meet the “In-Use Off-Road Diesel Vehicle Regulation” of New York Local Law 77.

January 01, 2009

Huss diesel exhaust aftertreatment device installed on a Volvo wheel loader

Volvo Construction Equipment entered a strategic partnership with Huss, a Swiss specialist in diesel exhaust aftertreatment, to provide diesel exhaust retrofit systems for Volvo construction equipment that will significantly reduce exhaust emissions. The Huss system is verified to meet California's CARB Level 3 requirements (minimum 85 percent particulate collection), and Volvo equipment owners using the system will be able to meet the “In-Use Off-Road Diesel Vehicle Regulation” of New York Local Law 77.

The Huss retrofit can collect 99 percent of diesel particulate matter emissions, substantially exceeding CARB requirements, with no increase of diesel NOx emissions or other secondary pollutants. Volvo CE will begin its engine retrofit program immediately with Huss MK exhaust aftertreatment. The partnership is based on an agreement between Volvo and Huss that will make Huss systems available for Volvo Trucks, Mack Trucks, Volvo Penta, and Volvo Bus engine retrofit globally.

The retrofit system integrates a particulate filter into the vehicle exhaust system, and a Huss control unit monitors filter function to control diesel regeneration. Active filter regeneration, using an integrated fuel burner, typically takes place after 8 to 10 operating hours and is completed in 5 to 35 minutes. Engine exhaust backpressure is set to Volvo requirements.

Huss was one of the first to have a CARB-verified emissions-control technology and to establish sales, technical support and components warehousing in California to serve North America. Applications of the HUSS systems include construction/mining equipment, industrial and refuse trucks, heavy-duty on-highway vehicles and more.

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