Volvo Trucks North America this week unveiled its new family of heavy-duty diesel engines for 2007. The new Volvo engines – the 11-liter D11, 13-liter D13 and 16-liter D16 –
are designed to deliver excellent fuel economy, reliability, durability and driving performance. At the same time, each of the new engines meets the very strict U.S. emissions standards that take effect in 2007
“The new Volvo engine family will make our air cleaner and help our customers be more productive and efficient,” said Peter Karlsten, president and CEO of Volvo Trucks North America. “These engines will deliver fuel economy equivalent to our current engines. Drivers will enjoy outstanding driveability from the engines’ power, torque and response. And everyone benefits from lower emissions made possible by Volvo’s advanced diesel technology.”
As previously announced, Volvo Trucks North America will use high-performance cooled exhaust gas recirculation (EGR) and diesel particulate filters (DPF) to achieve the new emissions standards. This builds seamlessly on Volvo’s experience with EGR in North America since 2002, as well as years of Volvo experience with DPF in other markets. The third component of the emissions reduction formula is the ultra-low sulfur diesel, which will be introduced in North America in the fourth quarter of 2006
The new engine family gives Volvo customers a complete range of options for their operations in North America. The engine builds upon the legacy of the Volvo D12, the highest-selling heavy-duty engine model in the world in 2005.
The Volvo D11 will be available in the Volvo VNM (medium hood length) and Volvo VNL (long hood) models. The engine will be available with 325 horsepower to 405 horsepower, with torque from 1,250 to 1,450 pounds-feet. Primary applications will be pickup and delivery, less-than-truckload and regional distribution. The D11’s low weight of 2,175 pounds also suits it for weight-sensitive applications such as bulk tanker and petroleum transport.
The Volvo D13 will be available in the Volvo VNM and Volvo VNL tractors, as well as the Volvo VHD vocational truck and tractor. The D13 will be available with 335 horsepower to 485 horsepower, with torque levels from 1,350 to 1,650 pounds-feet and weighs 2,550 pounds. Primary applications for the D13 are LTL, truckload, linehaul freight and vocational duties.
The Volvo D16 was first introduced for North American use in 2005. For 2007, it has been updated to the new emissions standards. The D16 will again be available in the Volvo VNL and Volvo VT. For 2007, the D16 will be available with 450 horsepower up to 600 horsepower, and with torques from 1,650 pounds-feet to 2,050 pounds-feet. The D16 weighs 3,070 pounds. The D16 provides maximum power for applications such as heavy haul, owner-operators, and small premium fleets.
Volvo Trucks North America will also continue to offer the popular 15-liter Cummins ISX with 2007 emissions technology as an option in its Volvo VN and Volvo VT highway tractors.
The new engine family draws upon Volvo’s 60-plus years of diesel innovation and experience to deliver sophisticated technology for customers. Some important features of the new Volvo engines include:
• Ultra High Fuel Injection Pressure (UHFP), with maximum fuel injection pressures raised 20 percent over the Volvo D12 to 35,000 psi. The higher pressures improve fuel atomization and dispersal in the cylinder for more efficient combustion and lower emissions.
• Multiple fuel injections per stroke, utilizing a new proprietary actuation strategy for the dual-solenoid unit fuel injector Volvo introduced on its 2002 Volvo D12. This gives extremely precise control over fuel injection for emissions control and engine performance.
• Single-stage variable geometry turbocharger (VGT), with a sliding nozzle and electronic actuation. The VGT delivers enhanced engine response and driveability, as well as greater backpressure for the EGR system. The electronic actuator gives more precise control than a pneumatic actuator. Both the turbo bearing housing and the actuator are water-cooled. Volvo first introduced this technology on the D16 in 2005.
• Increased peak cylinder pressures allow the engine to extract more energy from each drop of fuel.
• Single-piece, rigid deck cylinder head with four valves per cylinder and 38 cylinder head fasteners is built to withstand the higher injection and cylinder pressures for increased durability and reliability. Like the engine block, the head is cast with proprietary technology in Volvo’s own foundry in Skövde, Sweden.
• Steel cylinder head gasket is also designed for higher combustion pressures for increased reliability and durability.
• Steel “ladder” reinforcement to increase stiffness of main-bearing area for today’s combustion pressures for increased reliability and durability.
• Rear-mounted gear train with camshaft damper drives the overhead camshaft, air compressor, and power steering pump. The viscous damper on the camshaft absorbs the torsional vibrations generated by high-pressure fuel injection and routes those vibrations into the flywheel, where they are effectively absorbed. This increases reliability and durability, and contributes to longer life for engine-driven components. Placing the gear train at the rear of the engine block also improves air flow and cooling around the engine.
• Volvo Engine Brake (VEB) with high retardation over the speed range, integrated into engine for safety and longer foundation brake life.
• Volvo VECTRO EMS engine electronics with enhanced diagnostics builds on the established engine controls and extensive diagnostic capabilities of the previous generations of VECTRO. VECTRO easily handles the additional requirements of the DPF’s operation.
• Full-flow oil filtration with deep-flow canisters ensuring full media usage.
• Bypass oil filter uses 5-micron filter to remove fine particles.
• Low-return, low-flow fuel system cools fuel in the engine, not the fuel tank, providing consistent fuel temperature to the injectors regardless of extreme summer heat or winter cold, for consistent power and better fuel economy.
• Standard engine mounted primary fuel filter with in-cab water-in-fuel warning indicator.
Volvo is an integrated manufacturer of trucks and engines. This expertise allowed Volvo to design the new engines to fit into the Volvo VN, Volvo VT and Volvo VHD trucks with minimal changes. The new engines with their high-capacity cooling systems were fully integrated into each truck’s design with the result that the engines require no exterior alterations to the trucks.
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