September 30, 2013
Volvo Trucks announced Monday that all model year 2014 Volvo engines will offer fuel efficiency improvements as a result of optimized and enhanced engine componentry.
Volvo trucks equipped with a 2014 Volvo D11, D13 or D16 engine will see an increase in fuel efficiency ranging from .5 to 2 percent, the company says.
“Volvo trucks equipped with 2014 engine technology will deliver substantial fuel efficiency benefits, while also providing the power and performance customers expect from a Volvo powertrain,” says Gӧran Nyberg, president of Volvo Trucks North American Sales & Marketing.
At the heart of fuel efficiency benefits are multiple optimized or new engine components. Low-friction cylinder improvements – including a redesigned piston and liner developed with smoother surfaces – and a clutched air compressor, which completely disengages the clutch from the engine, have been introduced in the 2014 engine models.
A new seven-hole injector offers improved fuel atomization for a more even distribution of fuel within the cylinder while maximizing fuel efficiency, Volvo says.
A new crankcase ventilation system filters more oil from blowby gases before leaving the engine and at the same time improves engine backpressure for better performance.
Along with fuel efficiency improvements, design changes have been made to improve serviceability, such as the two-piece valve cover. Volvo says it also removed lead from the valvetrain of its 2014 engines to reduce its environmental impact.
Powertrain improvements are just part of a multi-tiered effort to boost fuel economy at Volvo. The company also introduced aerodynamic components – redesigned mirror heads with aerodynamic shrouds and arms, redesigned hood mirrors that also increase visibility, and additional ground effect features below the bumper and side fairings – for Volvo VN model highway trucks.
In addition to fuel efficiency improvements of up to 5 percent or more with the introduction of EPA ’10 engines with SCR technology, Volvo Trucks delivers additional fuel efficiency through its XE – exceptional efficiency – powertrain package. Available on Volvo-powered VN highway tractors, the XE package boosts fuel efficiency by about three percent by lowering engine rpm at a given vehicle speed, a concept Volvo calls “downspeeding.” Possible through the combination of Volvo’s I-Shift automated manual transmission and a Volvo engine with modified software, XE allows the engine to cruise about 200 rpm less than the average truck.
Fuel efficiency improves by about 1.5 percent for every 100 rpm of downspeeding, so customers spec’ing the XE package can expect up to a 3 percent improvement when compared with another overdrive transmission in a similar operation.