Volvo Trucks NA Unveils 2007 Diesels; $7500 More

Posted on February 14, 2006

Volvo Trucks North America announced its family of heavy-duty diesel engines for the 2007 on-highway truck emissions market; the 11-liter D11, 13-liter D13 and 16-liter D16.

Volvo Trucks North America also said that the 2007 emissions technology price increase for its trucks will be $7500.

The price increase will be listed as a surcharge on invoices of new trucks built with the 2007 engines. The price increase includes Volvo trucks equipped with Cummins ISX engines, as well as the D11, D13 and D16 engines. The surcharge covers the work that has been done to meet the 2007 requirements, including new technology for the engines, exhaust aftertreatment systems, cooling system enhancements and changes to electronic engine controls, Volvo said.

As previously announced, Volvo will use cooled exhaust gas recirculation and diesel particulate filters to achieve the new emissions standards.

The D11 will be available in the Volvo VNM (medium hood length) and Volvo VNL (long hood) models. The engine will be available with 325 hp to 405 hp, with torque from 1250 to 1450 lb-ft. The Volvo D13 will be available in the Volvo VNM and Volvo VNL tractors, as well as the Volvo VHD vocational truck and tractor with ratings from 335 hp to 485 hp, with torque levels from 1350 to 1650 lb-ft. The Volvo D16 will again be available in the Volvo VNL and Volvo VT trucks and rated 450 hp to 600 hp, and with torques from 1650 lb-ft to 2050 lb-ft.

Volvo Trucks North America will also continue to offer the 15- liter Cummins ISX with 2007 emissions technology as an option in its Volvo VN and Volvo VT highway tractors.

Technical features of the Volvo diesels include ultra high fuel injection pressure, with maximum fuel injection pressures raised 20% over the Volvo D12 to 35,000 psi. The fuel system is capable of 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.

The engines will also use 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, Volvo said. An electronic actuator is used for more precise control and both the turbo bearing housing and the actuator are water-cooled. Volvo first introduced this technology on the D16 in 2005.

The cylinder head is a single-piece, rigid deck design with four valves per cylinder and 38 cylinder head fasteners to withstand the higher injection and cylinder pressures. Like the engine block, the head is cast with proprietary technology in Volvo's Skovde, Sweden foundry. A steel cylinder head gasket is also designed for the higher combustion pressures for increased reliability and durability.

A rear-mounted gear train is employed with camshaft damper driving the overhead camshaft, air compressor, and power steering pump. The viscous damper on the camshaft is designed to absorb the torsional vibrations generated by high-pressure fuel injection and routes those vibrations into the flywheel, where they are absorbed, Volvo said. Placing the gear train at the rear of the engine block also improves air flow and cooling around the engine.

Volvo said its Vectro EMS engine electronics with enhanced diagnostics builds on the established engine controls and diagnostic capabilities of the previous generations of Vectro. Vectro is designed to handle the additional requirements of the DPF's operation.

Other technology features include: full-flow oil filtration with deep-flow canisters; a bypass oil filter with a 5-micron filter; a low-return, low-flow fuel system cools fuel in the engine, not the fuel tank, designed to provide consistent fuel temperature to the injectors regardless ambient temperatures; and a standard engine mounted primary fuel filter with in-cab water-in-fuel warning indicator.

Volvo said the new engines with high- capacity cooling systems were fully integrated into each truck's design with no exterior alterations to the trucks.