Answering the challenge of US (EPA) Tier 4 interim and EU Stage IIIB legislation, Volvo Construction Equipment has adopted a combination of ‘in-cylinder’ and ‘external’ solutions to meet the emissions reductions requirements.
Not only is there significant improvements in air quality, the results of over 100,000 hours of ‘real world’ machine reliability testing of the new technology show that Volvo’s Stage IIIB/Tier 4 interim-compliant Volvo diesel engines offer performance and economy of operation in terms of power capacity, engine response and fuel efficiency.
Meeting the new engine emission requirements has required a systems approach; engine changes alone are insufficient. As it is one of the few manufacturers that design and make both engine and machine, Volvo is in a strong position, one boosted by its ability to transfer its experience and technology from its global on-road Truck and Bus solutions. (Similar emissions requirements to Tier 4i/Stage IIIB are already in force in on-highway applications.) The new generation V-ACT (Volvo-Advanced Combustion Technology) engines feature high pressure variable fuel injection systems, efficient cooled exhaust gas recirculation (EGR), precise control of the turbochargers,
new EMS engine management systems and an integrated exhaust after treatment system that features a particulate filter and thermal regenerator.