After more than a year of speculation, Volvo Trucks North America (VTNA) has announced that its new family of Volvo diesel engines will be offered in 11- and 13-liter models, in addition to the 16-liter Volvo D16 introduced earlier this year. The engines will be shown early next year and begin full production in time to meet the next round of EPA emission standards, which take effect in January 2007.
The engines will use high-performance exhaust gas recirculation technology as the primary NOx emissions control and a diesel particulate filter to comply with EPA's 2007 emissions rule. VTNA pointed out that it has installed EGR systems in its current D12 Volvo diesel to meet less stringent EPA '02 requirements.
“Volvo engines for 2007 will simply use a higher rate of EGR to achieve the lower NOx emissions,” according to Sten-Ake Aronsson, senior vp of Volvo Powertrain NA.
Other emissions-related design elements:
Advanced, high-pressure fuel injection with multiple injections per stroke
Increased peak cylinder pressures
Single-stage variable geometry turbocharger
Reinforced base engine components to handle internal loads
High-capacity cooling system integrated into truck design
- Advanced centrifugal crankcase ventilation
Aronsson said that the new engines will offer fuel economy equal to the company's current diesels even though the ultra-low-sulfur diesel fuel required for '07 contains “1.5% less energy than current diesel.”
The engines will be built at the Volvo's Hagerstown, MD, plant.