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Volvo Trucks introduces enhanced turbo compound engine in VNL models

Volvo Trucks North America is introducing the next generation of its Turbo Compound technology, which the company says provides up to an additional 3% improvement in fuel efficiency over the current 13-liter Turbo Compound engine, the D13TC.

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Volvo-Turbo-Engine-VNL

Volvo Trucks North America is introducing the next generation of its Turbo Compound technology, which the company says provides up to an additional 3% improvement in fuel efficiency over the current 13-liter Turbo Compound engine, the D13TC.

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This new engine delivers up to 11% fuel savings overall compared to model-year 2015 trucks, Volvo says. Other improvements include enhanced efficiency over a wider range of applications, more engine ratings and a new EE Extra Efficiency drive mode. The new D13TC will be available for order in the fourth quarter of 2019 and go into production at the end of the first quarter of 2020.

“We developed our first generation of the turbo compound engine in 2017, and since then almost 300 million miles have been logged, validating the up to 8% fuel-savings benefits,” said John Moore, product marketing manager at Volvo Trucks North America. “This new D13TC further increases fuel efficiency by up to 3% over the current D13TC engine, saving approximately $1,200 per year per truck, based on the average fuel price and 125,000 miles per year.”

Volvo Trucks’ new D13TC offers three individual drive modes, Dynamic Torque, an additional 405 HP rating, and the next evolution of the Volvo Trucks’ patented wave piston design. These updates enable further-increased fuel efficiency over a wider range of loads, vehicle speeds and engine RPMs, Volvo says. This offers a broader use of applications compared to the first generation of the D13TC engine, which was designed specifically for over-the-road, long-haul applications for trucks loaded at 80,000 pounds.

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The three individual drive modes available with the new D13TC engine are Extra Efficiency, Economy and Performance. These modes will allow the driver to better optimize fuel efficiency for the vehicle with desired performance, depending on application, topography and driving conditions. This new engine also features a wider RPM efficiency band, which enables top fuel efficiency for longer periods of time.

Dynamic Torque is an incremental torque system designed to provide the right torque at the right time. Rather than operating in silos of high-torque and low-torque modes, Dynamic Torque automatically sets a torque level dependent upon the weight of the truck, the grade and the road conditions at any given time. Dynamic Torque also features an automatic 12th gear lockout on heavy loads with adaptive gearing engine ratings. A kick-down switch along with performance drive mode allow access to full torque for customers requiring it on demand.

The new engine also features a revised wave piston, designed and patented by Volvo Trucks. The improved design optimizes wave technology to evenly distribute the air/fuel mixture in the cylinder, burning the fuel more consistently than a traditional piston. Volvo’s design increases the compression ratio from 17:1 to 18:1 while maintaining up to a 90% reduction of soot in the cylinder, further improving fuel efficiency in the engine.

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